From rchawla neomagic.com Tue Jun 1 13:36:46 2004 From: rchawla neomagic.com (rchawla) Date: Tue Jun 1 06:13:35 2004 Subject: [Mp4-tech] MPEG4 video + AMR audio Message-ID: <40BC2B06.6030209@neomagic.com> Is a file writer reference software available on the net which can save MPEG4 video+AMR audio in a .mp4 file? Thanks for any help/suggestions. Regards, Rana From jean-claude.dufourd enst.fr Tue Jun 1 13:46:55 2004 From: jean-claude.dufourd enst.fr (Jean-Claude Dufourd) Date: Tue Jun 1 08:10:26 2004 Subject: [Mp4-tech] MPEG4 video + AMR audio In-Reply-To: <40BC2B06.6030209@neomagic.com> References: <40BC2B06.6030209@neomagic.com> Message-ID: <40BC5E9F.2030105@enst.fr> rchawla wrote: > Is a file writer reference software available on the net which can > save MPEG4 video+AMR audio in a .mp4 file? AMR audio is not possible in MP4 files. The interface with AMR audio is a 3GPP extension to the ISO base media file format. Now if your question was: "Is a file writer reference software available on the net which can save MPEG4 video+AMR audio in a .3gp file?" then did you try mpeg4ip ? Mp4Box (from the GPAC package) ? They should be able to do that. If you have a copy of mp4tool (which is not distributed anymore for licensing reasons), mp4tool is able to do this. Best regards JC From a_p_21 indiainfo.com Tue Jun 1 18:16:25 2004 From: a_p_21 indiainfo.com (anuradha prabhu) Date: Tue Jun 1 16:39:18 2004 Subject: [Mp4-tech] about AAC + streams Message-ID: <20040601114625.EC7022B2B58@ws5-7.us4.outblaze.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040601/d80c2b73/attachment.html From sanjayn1975 yahoo.com Wed Jun 2 00:31:26 2004 From: sanjayn1975 yahoo.com (Sanjay N) Date: Wed Jun 2 03:22:39 2004 Subject: [Mp4-tech] Need BSAC encoded Audio data Message-ID: <20040602063126.77931.qmail@web10806.mail.yahoo.com> Hi All, I am developing a BSAC decoder (for audio data MPEG4). Could someone please tell me where I can find a test BSAC encoded stream. ISO audio code has a BSAC encoder. (http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/audio.zip). But I am not able to find the right switch combination to encode using BSAC. Please let me know if there are BSAC streams already available for download or please let me know how to use BSAC in ISO code. Thank you in Advance. Best Regards, Sanjay --------------------------------- Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040601/d924413e/attachment.html From vasista_dsp hotmail.com Wed Jun 2 15:00:51 2004 From: vasista_dsp hotmail.com (vasista) Date: Wed Jun 2 05:42:36 2004 Subject: [Mp4-tech] Sampling frequencies and bit rates supported by HE AAC References: <20040602063126.77931.qmail@web10806.mail.yahoo.com> Message-ID: Hi to all, Can anybody please help in knowing sampling frequencies and bit rates that are supported by HE AAC decoder. Regards. Datta -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040602/2e92cb34/attachment.html From rdangerf hns.com Wed Jun 2 12:23:55 2004 From: rdangerf hns.com (Rick Dangerfield) Date: Wed Jun 2 12:02:24 2004 Subject: [Mp4-tech] Video test bitstreams for MPEG-4 Simple Profile Message-ID: Hi All, I have not able to find out where the bitstreams donated by the MPEG-4 Platform Verification Bitstream Development Project are located. Does anyone know how to locate these bitsreams? thanks Rickey Dangerfield -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040602/3f412985/attachment-0001.html From holger.grahn bitmanagement.de Thu Jun 3 01:02:24 2004 From: holger.grahn bitmanagement.de (Holger Grahn - Bitmanagement) Date: Thu Jun 3 01:45:49 2004 Subject: [Mp4-tech] MPEG4 video + AMR audio References: <40BC2B06.6030209@neomagic.com> <40BC5E9F.2030105@enst.fr> Message-ID: <00be01c448ed$49c283b0$0502a8c0@Maximum> Hi Jean Claude > If you have a copy of mp4tool (which is not distributed anymore for > licensing reasons), mp4tool is able to do this. Its a shame that you as a long time MPEG-4 systems chair man with your many contributions can not distribute MPEG-4 systems tools for licensing reasons. So does it means MPEG-LA kills use of Mpeg ? Greetings Holger From zhweizh mailst.xjtu.edu.cn Thu Jun 3 12:33:41 2004 From: zhweizh mailst.xjtu.edu.cn (zhweizh) Date: Thu Jun 3 01:50:57 2004 Subject: [Mp4-tech] about XVID Message-ID: <200406030332.i533VwDC011684@lists1.magma.ca> Hi, Recently, I download the XVID software Version 1.0 in www.xvid.org. But when I build the project:libxvidcore Win32 Release, there are following error messages: ------------------------------------------------------------------------------------------------- E:\xvidcore-1.0.0\src\plugins\plugin_2pass2.c(445) : error C2520: conversion from unsigned __int64 to double not implemented, use signed __int64 E:\xvidcore-1.0.0\src\plugins\plugin_2pass2.c(445) : error C2520: conversion from unsigned __int64 to double not implemented, use signed __int64 --------------------------------------------------------------------------------------------------- Please tell me How to correct the error. ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh@mailst.xjtu.edu.cn ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-06-03 From oamato wanadoo.fr Thu Jun 3 08:32:48 2004 From: oamato wanadoo.fr (Olivier Amato) Date: Thu Jun 3 10:02:15 2004 Subject: [Mp4-tech] MPEG-4 and timecode References: Message-ID: <005101c4492c$37a81ed0$0a00000a@tototxoxqlsjoa> Dear experts, I need to produce MPEG-4 files with the same timecode than the original content ( MPEG-2 and DV ), for low-resolution editing purpose. Is there a standardized way to include a timecode track into MP4 file format ? Which tools ( players, encoders, muxers, editing softwares, etc. ) are able to handle MPEG-4 files with timecode so far ? Thanks in advance. Olivier From gpascutto nero.com Thu Jun 3 09:23:21 2004 From: gpascutto nero.com (Gian-Carlo Pascutto) Date: Thu Jun 3 10:04:59 2004 Subject: [Mp4-tech] about XVID References: <200406030332.i533VwDC011684@lists1.magma.ca> Message-ID: <001801c44933$475b6bf0$6501a8c0@Dell> >E:\xvidcore-1.0.0\src\plugins\plugin_2pass2.c(445) : >error C2520: conversion from unsigned __int64 to double >not implemented, use signed __int64 > > Please tell me How to correct the error. Install at least Service Pack 5 for your MSVC compiler. -- GCP From helmut.ziegler stud.tu-ilmenau.de Thu Jun 3 12:21:37 2004 From: helmut.ziegler stud.tu-ilmenau.de (Helmut Ziegler) Date: Thu Jun 3 10:07:44 2004 Subject: [Mp4-tech] [Systems] MPEG-4 Authoring Tools Message-ID: <40BEEDA1.8070400@stud.tu-ilmenau.de> Hi, I'm a student and currently doing my final academical work. As part of it I'd like to give an overview about existing MPEG-4 Authoring Tools. Below you find a list with the tools I've found so far. If anyone of you knows other implementations or can give me further information please let me know. Best regards Helmut Kyungpook National University (MPEG-4 Studio, 2D) Fraunhofer HHI (2D) Institute for Research and Technology Hellas (MPEG-4 Toolbox, 3D) Digimax (Maxpeg Author, 3D) National Taiwan University (seems to be the same as Digimax Maxpeg Author) Envivio (4Mation, 2D) iVAST (Studio Author, 2D) ETRI (2D) GPAC (V4Studio, 2D) Mindego (2D, 3D) University of Port Elizabeth (2D) IBM (XMTEdit, 2D) ENST (MPEG-Pro, 2D, no longer maintained) TDK (WonderCreator, 2D, no information available) Philips (Veon Studio, 2D, no information available) Hong Kong University of Science and Technology (no information available) From dipankar.mitra lgsoftindia.com Thu Jun 3 16:57:13 2004 From: dipankar.mitra lgsoftindia.com (Dipankar Mitra) Date: Thu Jun 3 10:10:25 2004 Subject: [Mp4-tech] [3gpp] Video samples extracted from .3gp Message-ID: Hi All, I am trying to use the decoder from Microsoft "microsoft-vfdis-v10-990812", to decode video samples extracted from a .3gp file. But I get the following errors ... Bitstream without short headers detected VO 22... ERROR: Unknown complexity estimation method number 1. 20750 Anyone has any ideas what could be wrong here?? Regards, Dipankar -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040603/32359d2c/attachment.html From stefan.goor ucd.ie Thu Jun 3 18:12:06 2004 From: stefan.goor ucd.ie (Stefan A. Goor) Date: Thu Jun 3 14:43:51 2004 Subject: [Mp4-tech] VOP sequence number or timestamp? Message-ID: Hey All, I'm trying to reconstruct YUV from streams that have been transmitted with losses but I'm finding it difficult to map the encoded video frames to the decoder frames because of the IPB layout of the video. Is there any header in mpeg-4 content that indicates a VOP's time or sequence number for the decoded content? Thanks, Stefan From stefan.goor ucd.ie Thu Jun 3 20:29:53 2004 From: stefan.goor ucd.ie (Stefan A. Goor) Date: Thu Jun 3 15:51:27 2004 Subject: [Mp4-tech] IPB frames, maybe someone can explain a bit more in detail? Message-ID: Hey again, I'm still working on reconstructing a YUV video from an m4v bitstream but I a bit stuck. The video was transmitted a across a lossy network and filtering was used at the client to ensure that only full frames were passed to the decoder. So at the client I have an m4v file that contains an integer number of I P and B VOPs and this is decoded to a YUV file. I want to use this file for PSNR comparision so I need it to be the same length as the original video on the server. I planned to use YUV frame replication to cover the case where frames are lost because I know the decoding timestamps of all the VOPs and from this I can calculate their corresponding position in the decoded video. However, there are some IPB configurations that don't output the expected number of frames. For example if I have the streamed content: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 I P B B B P B B P B B I B B P now, lets assume that alot of the content is lost and we only get: 0 10 11 12 I B I B when I decode this, the output is: B B I but there is only 3 frames decoded! I would have expected 4 frames to be decoded e.g. I B B I, but the later I frame is discard, why is this? I would really apreciate if someone could explain why this occurs and if there are any useful links that discuss IPB coding and decoding in detail, I'd be very interested. Any help with this matter would be greatly appreciated, Regards, Stefan From sparikh sarnoff.com Thu Jun 3 19:39:18 2004 From: sparikh sarnoff.com (Sandip Parikh) Date: Thu Jun 3 20:04:25 2004 Subject: [Mp4-tech] YUV422 viewer References: <8433273875.20040527201920@mail.ru> Message-ID: <40BFA896.B384C320@sarnoff.com> Does anyone know of a YUV422 viewer ? Thanks, Sandip Stanislav Tihohod wrote: > Hello mp4-tech, > > New version of YUV Player Deluxe is available on www.yuvplayer.com. > Several new features was added, and the interface was improved. > > -- > Best regards, > Stanislav mailto:tihohod@mail.ru > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From ansgar.hoffmann gmx.de Sun Jun 6 12:23:11 2004 From: ansgar.hoffmann gmx.de (Ansgar Hoffmann) Date: Sun Jun 6 11:28:30 2004 Subject: [Mp4-tech] about XVID In-Reply-To: <200406030332.i533VwDC011684@lists1.magma.ca> References: <200406030332.i533VwDC011684@lists1.magma.ca> Message-ID: <40C2E27F.3020709@gmx.de> zhweizh schrieb: >Hi, >Recently, I download the XVID software Version 1.0 in www.xvid.org. >But when I build the project:libxvidcore Win32 Release, there are following error messages: >------------------------------------------------------------------------------------------------- >E:\xvidcore-1.0.0\src\plugins\plugin_2pass2.c(445) : error C2520: conversion from unsigned __int64 to double not implemented, use signed __int64 >E:\xvidcore-1.0.0\src\plugins\plugin_2pass2.c(445) : error C2520: conversion from unsigned __int64 to double not implemented, use signed __int64 >--------------------------------------------------------------------------------------------------- > >Please tell me How to correct the error. > > > Try this link, it helped me quite a lot: http://www.discdude.net/xvid/compile.html Apart from that, have you tried the user forum on the xvid site? Regards, Ansgar -- ******************************************************************** Neutrales Geld ist nicht alles -- aber ohne neutrales Geld ist alles nichts. Was ist neutrales Geld? www.geldreform.de From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:02:11 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:47:33 2004 Subject: [Mp4-tech] Re: [audio] AAC bitstream - headers In-Reply-To: <40A22BB9.A566B07D@cal.interrasystems.com> References: <40986B73.709E8483@cal.interrasystems.com> <409FBBE9.2050308@iis.fraunhofer.de> <40A1D9DB.ACC0C516@cal.interrasystems.com> <40A216E5.3020207@iis.fraunhofer.de> <40A22BB9.A566B07D@cal.interrasystems.com> Message-ID: <40C5B8D3.6040909@iis.fraunhofer.de> Anubrata Chakarabarti wrote: > Ralph Sperschneider wrote: > > >>Levels specify the complexity of the decoding process. This might be due to the >>number of channels, due to the sampling frequency, due to the number of objects, >>due to the permitted amount of FEC etc. > > > That means if I'm analyzing the input (but not decoding) then I need not worry about levels, right? That should be right. >>>2. If CRC check is present in ADTS frame then what measures will have to be taken at the decoder side? >> >>You don?t need to do anything but just skipt the crc word. If you wonna make >>sure that the received data is integer, you can derive the crc on decoder side >>and compare it with the transmitted crc word. > > > I believe for derivation of CRC i''ll need the CRC polynomial. Where do I get it? It is defined in the standard. >>>If yes then what should be the treatment for Data Stram Elemnts and/or Fill elements (from the perspective of an analyzer - do >>>they have any significance?) My question is based on the basic AU definition that all values in an AU are associated with time data. >> >>Data transmitted in the extension payload (I guess you talk about those data) >>might be of different kind. It might be directly related to the transmitted >>audio data (e.g. SBR, DRC) or just cover any kind of not specifically defined >>ancillary data. >> > > > Can they be considered as part of AU? I mean should I ignore them while decoding? The extension payload is part of the AU. Some kinds of extension payload are optional, while others are mandatory to be evaluate by a decoder. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:11:05 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:50:20 2004 Subject: [Mp4-tech] Re: [audio] Encoding with Error resilence (ERAACLC) In-Reply-To: <80464F9A4D2BF042A154DD067F1F539322EACD@CEL-BANGT-M01> References: <80464F9A4D2BF042A154DD067F1F539322EACD@CEL-BANGT-M01> Message-ID: <40C5BAE9.8030801@iis.fraunhofer.de> Dattaguru B.N wrote: > Hi, > I am talking about ISO encoder set up for AAC LC. > Now I want to set up ISO AAC LC encoder with ER support. > I found that ER source code is in aacErrRobTrans, but how > to include this into the AAC LC encoder workspace. I feel > without adding these files, I will not be able to encode audio > with ER support for AAC LC. > Thanks > Datta Hi, you cannot simply combine the code available in the direcectory aacErrRobTrans with the encoder code. As the name suggests, it is a transcoder. So it might be possible to first encode your audio data to AAC LC and than to transcode it to ER AAC LC. You might however run into trouble with regard to the file formats: The transcoder accepts only raw (headerless) data, and writes only raw data. I have some doubts whether the reference encoder provides raw data and the reference decoder reads raw data. Hope this helps, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:20:30 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:51:33 2004 Subject: [Mp4-tech] Re: [audio] best coder for 64kbit/s In-Reply-To: <40A4CAB0.7070900@ecs> References: <40A4CAB0.7070900@ecs> Message-ID: <40C5BD1E.6090803@iis.fraunhofer.de> Dear Noor, Noor Othman wrote: > Hi, > > Can anyone help me to understand, what is the best coder at 64kbit/s > and above? Do you mean 64kbit/s/channel? > And did I get it right that TwinVQ is only operates at bit > rates between 6-16 kbit/s? You are right with respect to what is permitted in the MPEG Audio standard. > But I have tried for higher bitrate it gives > better output. TwinVQ generally operates also for higher bitrats and as you found the quality still increases with the number of bits spend. However, above 16 kbit/s it is recommended to use AAC since it provides better quality at those bitrates than TwinVQ. TwinVQ uses a vector quantizer for the redundancy reduction, but AAC uses Huffman coding. Huffman coding is lossless, while the vector quantizer is not. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:30:37 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:52:40 2004 Subject: [Mp4-tech] any Latest test vectors available for MPEG4 In-Reply-To: <000501c443ae$62a4e240$c700a8c0@sathyavratha> References: <000501c443ae$62a4e240$c700a8c0@sathyavratha> Message-ID: <40C5BF7D.7090401@iis.fraunhofer.de> Sathyavratha wrote: > Dear friends, > > > > I’m working on MPEG4 for TMS3206414 processor, please > let me know the latest test vectors available for MPEG4. > > > > Regards > > Sathyavratha > > Are you actually going to implement the whole MPEG-4 technology on that processor? Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:41:36 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:53:38 2004 Subject: [Mp4-tech] Re: [MPEG4][Audio] Handling erroneous aac streams In-Reply-To: References: Message-ID: <40C5C210.6090406@iis.fraunhofer.de> S. R. Quackenbush wrote: > Dear Brata, > > If you are reading the AAC stream from an MPEG-4 file then you know the > AccessUnit framing and one AccessUnit is typically one AAC raw data block. > Since each AAC raw data block is decodable by itself (subject to boundary > overlap-add errors), you can skip forward and backward as you wish. > > If you really have an MPEG-2 AAC bitstream, which is a sequence of AAC raw > data blocks, you have to parse every block to know when the next starts. > Sorry! Unless ADTS is used, which comes with its own sync and framing. But since we (according to the subject) most likely talk about MPEG-4, why not mention LOAS/LATM, which is the (more flexible) MPEG-4 Audio transport and multiplex scheme? BTW: It would very much help if questioners would clearly state what they have and what they want (MPEG-2 AAC (which profile?) or MPEG-4 AAC (which AOT?), kind of transport (ADTS, LATM) or file format (ADIF, MP4FF)). Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Jun 8 16:45:21 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 9 10:54:47 2004 Subject: [Mp4-tech] where can download MP4 files In-Reply-To: <005101c4448f$2f6a8a60$6b7410ac@excha> References: <005101c4448f$2f6a8a60$6b7410ac@excha> Message-ID: <40C5C2F1.9080507@iis.fraunhofer.de> ranzhao wrote: > > Dear All > > Could anyone please tell me where can download MP4 files. > > Thanks > > Best Regards, > zhaoran > I guess you mean "where can _I_ download MP4 files". You will most likely not get an answer unless you specify which kind of content (Audio, Video, ...) you would like. There are plenty of mp4 files with totally different content available and spread over the internet, and noone will collect all those addresses for you just because you did not specify more clearly what are you looking for. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From bulegato libero.it Tue Jun 8 21:17:31 2004 From: bulegato libero.it (Bule) Date: Wed Jun 9 10:55:47 2004 Subject: [Mp4-tech] question about H.264 Message-ID: <000801c44d84$dddf7e90$a1141997@master> Hi I am an italian student of Telecomum?nications Engineering on Padua and i am writing a thesis about H.264 for my thrre years degree..but i have some questions. I have serached on internte but and i don't find any answer so i hope someone of you can help me: - i don't understand the meaning of the variable rem_intra4x4_pred_mode[ luma4x4BlkIdx ] of the ITU standard, where is set the value of this variable and why sometimes i have to consider it instead of the predIntra4x4PredMode which is the most prbable mode ( following the definition of vcodex), perhaps because using the prediction mode defined by predIntra4x4PredMode i'll do an error which is higer than the maximum permitted ?? Please help me REgards, Luca PS Sorry for my english. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040608/4c07ad2b/attachment-0001.html From bulegato libero.it Tue Jun 8 21:26:54 2004 From: bulegato libero.it (Bule) Date: Wed Jun 9 10:56:58 2004 Subject: [Mp4-tech] question on H.264 Message-ID: <003201c44d86$2d9173c0$a1141997@master> Hi I am an italian student of Telecomum?nications Engineering on Padua and i am writing a thesis about H.264 for my thrre years degree..but i have some questions. I have serached on internte but and i don't find any answer so i hope someone of you can help me: - i don't understand the meaning of the variable rem_intra4x4_pred_mode[ luma4x4BlkIdx ] of the ITU standard, where is set the value of this variable and why sometimes i have to consider it instead of the predIntra4x4PredMode which is the most prbable mode ( following the definition of vcodex), perhaps because using the prediction mode defined by predIntra4x4PredMode i'll do an error which is higer than the maximum permitted ?? Please help me REgards, Luca PS Sorry for my english. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040608/6749aaed/attachment.html From nso01r ecs.soton.ac.uk Wed Jun 9 17:39:54 2004 From: nso01r ecs.soton.ac.uk (Noor Othman) Date: Wed Jun 9 13:52:20 2004 Subject: [Mp4-tech] Usage of AAC of stereo input Message-ID: <40C72F4A.2090103@ecs> Hello, Can anyone help me, on how to use AAC with stereo input. Should I set the environment to since it has 2 channels here. I used this command in hope of encoding the 2 channels as 2 single_channel_elements: ./Linux_g++_O0d/enc -d 3 -r 64000 -c "-lc" -o mozart_64.aac mozart_60s.wav however, the output that I obtained only half of the file has been encoded and decoded. Can anyone help? And if I were to encode the 2 channels (of stereo input file) one channel_pair_element, how would the command change? And how should I set the raw file? Thanks. From bulegato libero.it Wed Jun 9 19:14:51 2004 From: bulegato libero.it (Bule) Date: Wed Jun 9 13:57:22 2004 Subject: [Mp4-tech] [video] H.264 and the selection of the best intra4x4mode Message-ID: <002a01c44e3c$e5a88f50$d4291997@master> Hi I am an italian student of Telecomum?nications Engineering on Padua and i am writing a thesis about H.264 for my thrre years degree..but i have some questions. I have serached on internte but and i don't find any answer so i hope someone of you can help me: - i don't understand the meaning of the variable rem_intra4x4_pred_mode[ luma4x4BlkIdx ] of the ITU standard, where is set the value of this variable and why sometimes i have to consider it instead of the predIntra4x4PredMode which is the most prbable mode ( following the definition of vcodex), perhaps because using the prediction mode defined by predIntra4x4PredMode i'll do an error which is higer than the maximum permitted ?? Please help me REgards, Luca PS Sorry for my english. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040609/7b714c29/attachment.html From garysull windows.microsoft.com Wed Jun 9 10:57:22 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Wed Jun 9 14:02:15 2004 Subject: [Mp4-tech] question about H.264 Message-ID: <91D7F2CEE3425A4A9D11311D09FCE246095FE150@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Skipped content of type multipart/alternative From j.dahlberg spray.se Wed Jun 9 20:15:30 2004 From: j.dahlberg spray.se (Jonas Dahlberg) Date: Wed Jun 9 14:07:30 2004 Subject: [Mp4-tech] AAC versions In-Reply-To: <200406091600.i59G0Xo3014722@lists1.magma.ca> References: <200406091600.i59G0Xo3014722@lists1.magma.ca> Message-ID: <40C745B2.2010201@spray.se> Hi all, this is a question of no importance :-) I've just bougth a Nokia phone with mp4 capabilities but can't get it to play AAC audio, neither in a mp4 video or only audio from Quicktime. It seems like AAC audio exporting from quicktime puts the audio in another container compared to the AAC-files allready on the phone, and the phones files can't be played from quicktime but in other players like VLC. The strange thing is that when I use AAC-audio in a MPEG-4 movie it's silence in the phone, so I'm not shure if it is only the container that mess things up. Nokia support had funny but irrelevant answers... Any clues? Cheers. From mfhsieh knowledgeack.com.tw Thu Jun 10 10:03:49 2004 From: mfhsieh knowledgeack.com.tw (Wilson) Date: Thu Jun 10 10:05:35 2004 Subject: [Mp4-tech] Acquire for MPEG4 PS sample Message-ID: <002401c44e86$ca993940$0b01a8c0@IBM7D4665E6A54> Hello All, I'm testing my MPEG-4 PS parser and player. Since I got only one sample file for testing, I'd like to run the program with more samples for verification, especially on the format of program stream and the sync between A/V. Could somebody kindly send me one such file with synchronized A/V streams ? Or it there any free tool I can use for generating such a file ? Responses to either question will be appreciated. Thank you. :) Regards, Wilson -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/a621e8c8/attachment.html From vasista_dsp hotmail.com Thu Jun 10 11:32:01 2004 From: vasista_dsp hotmail.com (vasista) Date: Thu Jun 10 10:08:34 2004 Subject: [Mp4-tech] [audio]Down sampling frequency of conformance tool References: <40A4CAB0.7070900@ecs> <40C5BD1E.6090803@iis.fraunhofer.de> Message-ID: Hi, I am working on MPEG4 HE-AAC decoder. Can anybody please help me in finding the down sampling frequency of the down sampler in the SBR conformance tool. Regards, Dattaguru BN Vasista From hans-juergen.bardenhagen arcor.de Thu Jun 10 06:03:01 2004 From: hans-juergen.bardenhagen arcor.de (Hans-Juergen Bardenhagen) Date: Thu Jun 10 10:12:14 2004 Subject: [Mp4-tech] AAC versions In-Reply-To: <40C745B2.2010201@spray.se> Message-ID: <9AaM3uDzTuB@ID-50271.user.uni-berlin.de> Hi Jonas, on 09.06.04, 19:15 local time (received 10.06.04, 01:15 GMT+2) you wrote: > Any clues? Try to create MPEG-2 AAC LC files with ADTS headers and the *.aac file extension. There are several ways to achieve this, either you extract these files from the MP4 container with a tool like mp4creator, or you could also encode them with a codec that can output this format like FAAC (default), Nero or compaact. Other hardware decoders like some Philips Expanium CD portables also play this file format only, not the AAC bitstream in a MP4 container. By the way, the iTunes file extension *.m4a is a MP4 file container, too, it simply uses another file extension for it. ZZee ya, Hans-J?rgen From rkiran emuzed.com Thu Jun 10 15:17:15 2004 From: rkiran emuzed.com (Ravi Kiran) Date: Thu Jun 10 10:14:44 2004 Subject: [Mp4-tech] [Audio]About BSAC Conformance Test Streams Message-ID: <001901c44ec7$8c9cc800$260aa8c0@blr.emuzed.com> Hi All, I am developing MPEG4 BSAC decoder. I downloaded the conformance streams from FhG FTP site. ISO/IEC 14496-4 (conformance testing) says that er_bs06_ep0/1 streams contain SBA data but the streams that I downloaded do not have it. Also none of the streams have PNS data. Can anybody throw some light on this? Are there any updates in conformance streams and if so where can I find them? Thanks in advance. Warm Regards, Ch. Ravi Kiran -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/ed3c3883/attachment.html From naveenu tataelxsi.co.in Thu Jun 10 15:57:40 2004 From: naveenu tataelxsi.co.in (Naveenu Vishwa Prakash P) Date: Thu Jun 10 10:17:19 2004 Subject: [Mp4-tech] Need mpeg4 Source code.. Message-ID: <01f001c44ecd$2d660760$a201090a@naveenu> Dear Friends, Can any one tell where can I get windows based mpeg4 source code. Thanks in Advance. Regards Naveenu -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/06aa03dc/attachment.html From PatrickSchuchardt gmx.de Thu Jun 10 13:52:00 2004 From: PatrickSchuchardt gmx.de (Patrick Schuchardt) Date: Thu Jun 10 10:21:05 2004 Subject: [Mp4-tech] (no subject) Message-ID: <30708.1086864720@www6.gmx.net> Hi to all, I am create some mp4 files with 3D content from XMT-A/XMT-O.Now I am searching for some Tools, which convert xmt to mp4. The Ibm-Toolkit is able to do this, but it cant handle with 3D-XMT-O. Thanks Patrick -- +++ Jetzt WLAN-Router für alle DSL-Einsteiger und Wechsler +++ GMX DSL-Powertarife zudem 3 Monate gratis* http://www.gmx.net/dsl From PatrickSchuchardt gmx.de Thu Jun 10 13:52:16 2004 From: PatrickSchuchardt gmx.de (Patrick Schuchardt) Date: Thu Jun 10 10:23:25 2004 Subject: [Mp4-tech] XMT-O Message-ID: <31938.1086864736@www6.gmx.net> Hi to all, I am create some mp4 files with 3D content from XMT-A/XMT-O.Now I am searching for some Tools, which convert xmt to mp4. The Ibm-Toolkit is able to do this, but it cant handle with 3D-XMT-O. Thanks Patrick -- +++ Jetzt WLAN-Router für alle DSL-Einsteiger und Wechsler +++ GMX DSL-Powertarife zudem 3 Monate gratis* http://www.gmx.net/dsl -------------- next part -------------- A non-text attachment was scrubbed... Name: Patrick Schuchardt.vcf Type: text/x-vcard Size: 1 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20040610/e91736b3/PatrickSchuchardt.bin From satish samsung.com Thu Jun 10 19:17:31 2004 From: satish samsung.com (Satish Hipparagi) Date: Thu Jun 10 10:26:17 2004 Subject: [Mp4-tech] Re: [MPEG4][Audio] Handling erroneous aac streams References: <40C5C210.6090406@iis.fraunhofer.de> Message-ID: <001a01c44ee9$1934e560$73466c6b@sisodomain.com> Hi ALL, Can somebody tell me where can I find MPEG4 Annex L Rate Control document? Thanks in advance, Regards, Satish From rkiran emuzed.com Thu Jun 10 19:31:06 2004 From: rkiran emuzed.com (Ravi Kiran) Date: Thu Jun 10 10:30:01 2004 Subject: [Mp4-tech] [Audio] About BSAC Conformance Test Streams Message-ID: <010001c44eeb$035acd20$260aa8c0@blr.emuzed.com> Hi All, I am developing MPEG4 BSAC decoder. I downloaded the conformance streams from FhG FTP site. ISO/IEC 14496-4 (conformance testing) says that er_bs06_ep0/1 streams contain SBA data but the streams that I downloaded do not have it. Also none of the streams have PNS data. Can anybody throw some light on this? Are there any updates in conformance streams and if so where can I find them? Thanks in advance. Warm Regards, Ch. Ravi Kiran -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/aea0d1e0/attachment.html From Efi gizmoz.com Thu Jun 10 17:02:13 2004 From: Efi gizmoz.com (Efi Ben-Moshe) Date: Thu Jun 10 10:32:58 2004 Subject: [Mp4-tech] MP4/3GP File Format Message-ID: Nicolas Can you please explain the way you wrrap both H.263 & AMR file into one .3gp file? Thank U! Efi -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/95e8b3e8/attachment.html From stefan.goor ucd.ie Thu Jun 10 18:09:01 2004 From: stefan.goor ucd.ie (Stefan A. Goor) Date: Thu Jun 10 14:51:12 2004 Subject: [Mp4-tech] Need mpeg4 Source code.. In-Reply-To: <01f001c44ecd$2d660760$a201090a@naveenu> Message-ID: Here a link for the mpeg-4 reference software: http://megaera.ee.nctu.edu.tw/mpeg/ Best Regards, Stefan -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Naveenu Vishwa Prakash P Sent: 10 June 2023 10:28 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Need mpeg4 Source code.. Dear Friends, Can any one tell where can I get windows based mpeg4 source code. Thanks in Advance. Regards Naveenu -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040610/3a5c7d82/attachment.html From swhong csis.hku.hk Fri Jun 11 00:56:26 2004 From: swhong csis.hku.hk (swhong@csis.hku.hk) Date: Thu Jun 10 14:52:10 2004 Subject: [Mp4-tech] How to Create a Header for 16-bit PCM Audio Raw Data Message-ID: <1086882986.40c884aa070b5@intranet.csis.hku.hk> I'm trying to create a MP4 file that accepts 16-bit PCM audio raw data. But, I've problem in filling in the decoder specific header information in the ESDS atom. I've checked the MPEG-4 part 3 standard that no decoder type code was given for PCM raw data. Only decoder type code, for example AAC, CELP etc, was given. Would anybody here advise me how to do that. Actually, I'm query whether I can simply attach the raw audio data, I mean PCM data, to the MP4 file without wrapping the data with a mpeg4 recognized encoder (e.g. AAC, CELP etc.). Please advise me. Thanks in advance. -- Philip Hong ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/ From rkiran emuzed.com Fri Jun 11 11:00:05 2004 From: rkiran emuzed.com (Ravi Kiran) Date: Fri Jun 11 10:57:29 2004 Subject: [Mp4-tech] Need mpeg4 Source code.. References: <01f001c44ecd$2d660760$a201090a@naveenu> Message-ID: <005201c44f6c$c92390b0$260aa8c0@blr.emuzed.com> Hi Naveen, What part of MPEG-4 source code do you require - audio,video or systems? MPEG-4 source code for audio can be obtained from ftp.tnt.uni-hannover.de/incoming. You may require login and password for this. Hope this helps. Regards Ravi Kiran ----- Original Message ----- From: Naveenu Vishwa Prakash P To: mp4-tech@lists.mpegif.org Sent: Thursday, June 10, 2023 2:57 PM Subject: [Mp4-tech] Need mpeg4 Source code.. Dear Friends, Can any one tell where can I get windows based mpeg4 source code. Thanks in Advance. Regards Naveenu ------------------------------------------------------------------------------ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040611/0abba019/attachment.html From bvs soc-soft.com Fri Jun 11 18:24:23 2004 From: bvs soc-soft.com (Naga Raju B.V.S.) Date: Fri Jun 11 10:58:39 2004 Subject: [Mp4-tech] HE AAC Audio Message-ID: Hi, Where can I get standards for HE AAC. Regards, B.V.S.Nagaraju The information contained in this e-mail message and in any annexure is confidential to the recipient and may contain privileged information. If you are not the intended recipient, please notify the sender and delete the message along with any annexure. You should not disclose, copy or otherwise use the information contained in the message or any annexure. Any views expressed in this e-mail are those of the individual sender except where the sender specifically states them to be the views of SoCrates Software India Pvt Ltd., Bangalore. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040611/e8106a68/attachment.html From cyril.concolato enst.fr Fri Jun 11 14:56:19 2004 From: cyril.concolato enst.fr (Cyril Concolato) Date: Fri Jun 11 10:59:52 2004 Subject: [Mp4-tech] [Systems] In-Reply-To: <30708.1086864720@www6.gmx.net> References: <30708.1086864720@www6.gmx.net> Message-ID: <40C99DE3.5020404@enst.fr> Hi Patrick, Patrick Schuchardt wrote: > Hi to all, > > I am create some mp4 files with 3D content from XMT-A/XMT-O.Now I am > searching for some Tools, which convert xmt to mp4. > The Ibm-Toolkit is able to do this, but it cant handle with 3D-XMT-O. The MP4Box tool from the gpac project (gpac.sourceforge.net) is able to encode XMT-A documents into BIFS and store the BIFS in an mp4 file. Best, -- Cyril Concolato Dept. Comelec Ecole Nationale Sup?rieure des T?l?communications, Paris 46, rue Barrault 75013 Paris Tel: +33145817991 Fax: +33145804036 From grl iis.fhg.de Fri Jun 11 16:50:46 2004 From: grl iis.fhg.de (Bernhard Grill) Date: Fri Jun 11 11:01:16 2004 Subject: [Mp4-tech] AAC versions In-Reply-To: <40C745B2.2010201@spray.se> References: <200406091600.i59G0Xo3014722@lists1.magma.ca> <40C745B2.2010201@spray.se> Message-ID: <40C9B8B6.3090800@iis.fhg.de> Jonas Dahlberg wrote: > Hi all, this is a question of no importance :-) > > I've just bougth a Nokia phone with mp4 capabilities but can't get it to > play AAC audio, neither in a mp4 video or only audio from Quicktime. It > seems like AAC audio exporting from quicktime puts the audio in another > container compared to the AAC-files allready on the phone, and the > phones files can't be played from quicktime but in other players like > VLC. The strange thing is that when I use AAC-audio in a MPEG-4 movie > it's silence in the phone, so I'm not shure if it is only the container > that mess things up. Nokia support had funny but irrelevant answers... > Dear Jonas, the Nokia Phone is probably complying to the 3GPP Specifications. If so, it might refuse the mp4 container file which is slightly different to the 3gpp container file format, although both formates are derived from the same ISO base file format and very similar. 3gpp insisted on this different flavour. The argument was that only in 3gpp-files it can be guaranteed that only the codec versions 3gpp mandates or recommends are included. mp4 files in general could contain more complex versions of MPEG-4 Video (e.g. Advanced Simple Profile) or e.g. AAC Main Profile or the MPEG-4 CELP speech coder which are not included in the 3gpp specification. In your case this mechanism might be the cause of failure, although the AAC LC tracks created by Quicktime in the mp4 files should play on the phone without any problem. Exchanging the mp4 ID in the file with the 3G ID is probably already enough to fix your problem. It is fairly easy with the ISO file format reference software to create a tool that fixes this tag issue. But there might be an easier way: AFAIK, QT from version 6.5 on can read and write the 3GPP file format. Still, hopefully somebody from Nokia is copying this mail and maybe future versions of the phone might be more tolerant to files with the mp4 ID -:). Best regards, Bernhard Grill > Any clues? > > Cheers. > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate identifier to > indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines > found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Dr. Bernhard Grill email: grl@iis.fhg.de Head of Audio Department, Fraunhofer IIS phone: +49 9131 776-351 Am Wolfsmantel 33, D-91058 Erlangen, Germany FAX: +49 9131 776-398 From purnhage tnt.uni-hannover.de Fri Jun 11 18:40:48 2004 From: purnhage tnt.uni-hannover.de (Heiko Purnhagen) Date: Sun Jun 13 14:58:43 2004 Subject: [Mp4-tech] Need mpeg4 Source code.. References: <01f001c44ecd$2d660760$a201090a@naveenu> <005201c44f6c$c92390b0$260aa8c0@blr.emuzed.com> Message-ID: <40C9D280.E2317622@tnt.uni-hannover.de> Hi, > Ravi Kiran wrote: > > Hi Naveen, > What part of MPEG-4 source code do you require - audio,video or > systems? MPEG-4 source code for audio can be obtained from > ftp.tnt.uni-hannover.de/incoming. You may require login and password > for this. Hope this helps. For publicly downloadable source code of MPEG-4 Audio, check http://www.tnt.uni-hannover.de/project/mpeg/audio/ftp/ and look for ISO/IEC 14496-5 in http://www.itscj.ipsj.or.jp/sc29/29w42911.htm where you for example find http://www.iso.org/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/ and http://www.itscj.ipsj.or.jp/sc29/open/29view/29n5897c.htm Heiko > > Regards > Ravi Kiran > > ----- Original Message ----- > From: Naveenu Vishwa Prakash P > To: mp4-tech@lists.mpegif.org > Sent: Thursday, June 10, 2023 2:57 PM > Subject: [Mp4-tech] Need mpeg4 Source code.. > > Dear Friends, > > Can any one tell where can I get windows based mpeg4 source > code. > > Thanks in Advance. > Regards > Naveenu > > ------------------------------------------------------------ From purnhage tnt.uni-hannover.de Fri Jun 11 18:48:02 2004 From: purnhage tnt.uni-hannover.de (Heiko Purnhagen) Date: Sun Jun 13 15:01:10 2004 Subject: [Mp4-tech] HE AAC Audio References: Message-ID: <40C9D432.2F986531@tnt.uni-hannover.de> Hi, > "Naga Raju B.V.S." wrote: > > Hi, > > Where can I get standards for HE AAC. > MPEG-4 High-Efficiency AAC is defined in ISO/IEC 14496-3:2001/Amd.1:2003 "MPEG-4 Part 3: Audio, AMENDMENT 1: Bandwidth extension" This standard was published about half a year ago and should be available from ISO or your national standardization body. For further details and info about an upcoming corrigendum (ISO/IEC 14496-3:2001/Amd.1:2003/Cor.1), check also http://www.itscj.ipsj.or.jp/sc29/29w42911.htm#MPEG-4 Best regards Heiko > > > Regards, > > B.V.S.Nagaraju > > The information contained in this e-mail message and in any annexure is > confidential to the recipient and may contain privileged information. If you are not > the intended recipient, please notify the sender and delete the message along with > any annexure. You should not disclose, copy or otherwise use the information contained > in the message or any annexure. Any views expressed in this e-mail are those of the > individual sender except where the sender specifically states them to be the views of > SoCrates Software India Pvt Ltd., Bangalore. > > --------------------------------------------------------------- From ralph.sperschneider iis.fraunhofer.de Fri Jun 11 20:21:35 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Sun Jun 13 15:01:49 2004 Subject: [Mp4-tech] Re: [audio] best coder for 64kbit/s In-Reply-To: <40C5C7E0.6090804@ecs> References: <40A4CAB0.7070900@ecs> <40C5BD1E.6090803@iis.fraunhofer.de> <40C5C7E0.6090804@ecs> Message-ID: <40C9EA1F.8090704@iis.fraunhofer.de> Noor Othman wrote: > Dear Ralph Sperschneider, > > Thank you for your reply. At the moment, I have yet to understand > what is the different between 1 channel or multi-channel. In the uncompressed (pcm) domain, each channel contributes to the overall bitrate equivalently. Hence, a stereo wav-File of a certain duration has twice the size of a mono wav-File of the same duration, assuming that the same bitrate and the same sample-coding has been used. In a general point of view, this is similar in the compressed domain. However, the audio coder might be able to reduce the overall bitrate using joint coding tools (the most common one in the case of AAC is M/S coding). > If you don't > mind, can I ask you about stereo sample file, which has 2 channels, and > how do I pass this into AAC coder? Or should I combined both, to be > mono, and then just pass it through 1 or single channel? The encoder has to be informed about the number of channels available in the input file and the number of channels it shall encode. > What does this multi-channel do? Splitting the info? Can a mono audio > input file, being passed through a multi-channel encoder? I am in a > great confusion... Thank you so much if you can help. A multi-channel encoder is usually able to encode up to n channels. So yes, it can also encode mone signals. Ralph > > Noor > > > Ralph Sperschneider wrote: > >> Dear Noor, >> >> Noor Othman wrote: >> >>> Hi, >>> >>> Can anyone help me to understand, what is the best coder at >>> 64kbit/s and above? >> >> >> >> Do you mean 64kbit/s/channel? >> >> >>> And did I get it right that TwinVQ is only operates at bit rates >>> between 6-16 kbit/s? >> >> >> >> You are right with respect to what is permitted in the MPEG Audio >> standard. >> >> >>> But I have tried for higher bitrate it gives better output. >> >> >> >> TwinVQ generally operates also for higher bitrats and as you found the >> quality still increases with the number of bits spend. However, above >> 16 kbit/s it is recommended to use AAC since it provides better >> quality at those bitrates than TwinVQ. TwinVQ uses a vector quantizer >> for the redundancy reduction, but AAC uses Huffman coding. Huffman >> coding is lossless, while the vector quantizer is not. >> >> Best regards, >> >> Ralph >> > > -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Fri Jun 11 20:53:01 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Sun Jun 13 15:03:50 2004 Subject: [Mp4-tech] Re: [Audio] Order of Syntactic elements In-Reply-To: <20040517130616.M2962@lion.unknow> References: <20040517130616.M2962@lion.unknow> Message-ID: <40C9F17D.20600@iis.fraunhofer.de> Anubrata Chakrabarti wrote: > Dear Ralph > I have the folllowing query: > > 1. Is the order of syntactic elements in the raw data block predefined? Is it > going to be the same as mentioned under section: 4.5.2.1.2? The order of syntactic elements in a raw_data_block() is not predefined. It is howevernot recommendable to vary it unless a program_config_element() is available to assure the correct channel mapping. > My concern is whether a raw data block can be decoded and passed to the > player (through application) as an independent unit? This can be done even if the order of syntactic elements in a raw_data_block() is not predefined. Note: Each syntactic element comes with an element_instance_tag (except of the fill_element()). This allows the decoder to assure the correct relationship between consecutive syntactic elements in the case that there is more than one syntactic element of the same kind present in a raw_data_block(). > If it's true then we can safely conclude that each raw data block will have > exactly the same number of syntactic elements (except DSE & FIL ) as the > number of channels. This can be concluded for single_channel_elements() and lfe_channel_elements(). channel_pair_elements() provide two channels. The number of SCEs, CPEs, CCEs and LFEs shall be the same in each consecutive raw_data_block(), but the order might vary (although I know no reason why it actually should). > What will be the sequence for streams having CCE? is it like > ... A coupling_channel_element() does never come on its own, since it will always be coupled on a SCE or CPE. > > Thanks & Regards > Anubrata Chakrabarti > Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ugeetha tataelxsi.co.in Mon Jun 14 12:32:27 2004 From: ugeetha tataelxsi.co.in (Geetha U) Date: Mon Jun 14 02:28:24 2004 Subject: [Mp4-tech] Re:[Video]SCR calculation Message-ID: <000001c451d5$41284aa0$4501080a@ugeetha> Hi, I have a problem in reading SCR value from Mpeg2 stream. I get the pack start code and then, if( (ps->ps_data[4] & 0xC0) == 0x40 ) { /* MPEG-2 */ ps->scr = ((u64)(ps->ps_data[4] & 0x38) << 27) | ((u64)(ps->ps_data[4] & 0x3) << 28) | ((u64)(ps->ps_data[5] & 0xff) << 20) | ((u64)(ps->ps_data[6] & 0xf8) << 12) | ((u64)(ps->ps_data[6] & 0x3) << 13) | ((u64)(ps->ps_data[7] & 0xff) << 5) | ((u64)(ps->ps_data[8] & 0xf8) >> 3); } Is this code correct. I want the value to be of type short. Will anyone help me in getting SCR value of short type? Thanks in advance, Geetha From vasista_dsp hotmail.com Mon Jun 14 13:29:44 2004 From: vasista_dsp hotmail.com (vasista) Date: Mon Jun 14 04:15:24 2004 Subject: [Mp4-tech] [audio]parametric stereo + SBR References: <1086882986.40c884aa070b5@intranet.csis.hku.hk> Message-ID: Hi to all, Can any body please explain me about parametric stereo ( suggest some links) and how it is related to SBR (the band width extension)? Thanks in advance, Regards Datta From saptarshi_bec yahoo.com Mon Jun 14 03:01:17 2004 From: saptarshi_bec yahoo.com (Saptarshi Ghosh) Date: Mon Jun 14 09:22:13 2004 Subject: [Mp4-tech] [Audio] ADTS Message-ID: <20040614090117.66649.qmail@web21202.mail.yahoo.com> Hi all, Could anyone please answer the following two questions: Question 1. Is it necessary to overlap/add the raw data blocks in a SINGLE ADTS frame with the raw data blocks in any other frame or can the data in a SINGLE frame be decoded independently ? Question 2. For crc checking, CRC16 polynomial 0x1021 is used. In this respect, please clarify the following parameters of the crc algorithm used: 1. Initial value of 16-bit register when the algorithm starts 2. Whether each byte is reflected before it is processed 3. Whether the final register value is to be reflected 4. Whether any 16-bit number is to be XORed to the final register value 5. The checksum for the data string "123456789" as produced by this algorithm. Thanking you, S.G. __________________________________ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/ From bvs soc-soft.com Mon Jun 14 18:46:00 2004 From: bvs soc-soft.com (Naga Raju B.V.S.) Date: Mon Jun 14 09:25:40 2004 Subject: [Mp4-tech] HE AAC test streams Message-ID: Hi, Can you please tell where can I get HE AAC test streams. Thanks in advance, B.V.S.Nagaraju The information contained in this e-mail message and in any annexure is confidential to the recipient and may contain privileged information. If you are not the intended recipient, please notify the sender and delete the message along with any annexure. You should not disclose, copy or otherwise use the information contained in the message or any annexure. Any views expressed in this e-mail are those of the individual sender except where the sender specifically states them to be the views of SoCrates Software India Pvt Ltd., Bangalore. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040614/b25c92aa/attachment.html From rob.koenen mpegif.org Mon Jun 14 16:47:12 2004 From: rob.koenen mpegif.org (Rob Koenen (MPEGIF)) Date: Mon Jun 14 14:15:16 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: Message-ID: <001e01c45216$19cd9c80$dde4aa0c@corp.intertrust.com> The information contained in this e-mail message and in any annexure is confidential to the recipient and may contain privileged information. If you are not the intended recipient, please notify the sender and delete the message along with any annexure. You should not disclose, copy or otherwise use the information contained in the message or any annexure. Any views expressed in this e-mail are those of the individual sender except where the sender specifically states them to be the views of SoCrates Software India Pvt Ltd., Bangalore. A reminder to all of you with similar footnotes: you may not send confidential and/or privileged information on this list. Rob -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040614/8245a11c/attachment.html From rlei ati.com Mon Jun 14 16:38:57 2004 From: rlei ati.com (Ryan Lei) Date: Mon Jun 14 18:34:17 2004 Subject: [Mp4-tech] question about QuickTime file format Message-ID: Hi, all I have some quick time test clips. When I open them in a Hex Editor, I found some atom types or 4cc types are not defined in the file format specification. such as (C)nam, (C) aut, etc. the specification I have is the 2003 version. Anybody know a link to get the most recent version of the specification? thx Ryan Lei, Ph.D ATI Technologies Inc. Handheld Products Team 33 Commerce Valley Dr. East 1-905-8822600 ext 2712 (o) www.discover.uottawa.ca/~leizj/ -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040614/4a24498a/attachment.html From lzm02 mails.tsinghua.edu.cn Tue Jun 15 11:13:13 2004 From: lzm02 mails.tsinghua.edu.cn (Li Zhengming) Date: Tue Jun 15 01:55:22 2004 Subject: [Mp4-tech] [Audio] About AAC Audio Streaming Message-ID: <287265593.08220@mails.tsinghua.edu.cn> Dear all, I'm testing streaming mp4 with aac audio now. I encode a two-channel wav file into an aac file with ADTS header. Then I try to listen to this aac file with some aac decoders, it's ok and both two channels are present. But when I create a mp4 file with this aac file using mp4creator60 of the MPEG4IP project, and stream it with Darwin Server, the player can only give me the left channel. I have tried many files with two channels, and the results are the same. Then I extract the right channel from the audio file, and encode it into an aac file, and then create a mp4 file from it. Then while streaming with Darwin Server it works! The audio seems perfect, except that the volume is somewhat little. What's the reason of this? Is it due to the fact that streaming two-channel aac is not allowed, or that some operations in my process are wrong? Thank you all for your kind responses! Li Zhengming From snd codingtechnologies.com Tue Jun 15 11:47:09 2004 From: snd codingtechnologies.com (Andreas Schneider) Date: Tue Jun 15 07:38:35 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: References: Message-ID: <40CEB78D.8060708@codingtechnologies.com> Hello, assuming you mean HE AAC conformance streams, they can be found on the FhG ftp server in the subdirectory mpeg4audio-conformance/compressedMp4/sbr_new. Regards, Andreas Naga Raju B.V.S. wrote: > Hi, > > > > Can you please tell where can I get HE AAC test streams. > > > > Thanks in advance, > > > > B.V.S.Nagaraju > > The information contained in this e-mail message and in any annexure is > confidential to the recipient and may contain privileged information. If you are not > the intended recipient, please notify the sender and delete the message along with > any annexure. You should not disclose, copy or otherwise use the information contained > in the message or any annexure. Any views expressed in this e-mail are those of the > individual sender except where the sender specifically states them to be the views of > SoCrates Software India Pvt Ltd., Bangalore. > > > ------------------------------------------------------------------------ > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- _______________________________________________________________________ Andreas Schneider | Research Engineer | Coding Technologies | phone: +49 (0) 911 92891 -26 | Deutschherrnstr. 15-19 fax: +49 (0) 911 92891 -99 | 90429 Nuernberg, Germany mailto:snd@CodingTechnologies.com | http://www.CodingTechnologies.com From azaka abo.fi Tue Jun 15 20:07:38 2004 From: azaka abo.fi (Asim Pervez Zaka) Date: Tue Jun 15 17:59:39 2004 Subject: [Mp4-tech] Momusys mpeg4 In-Reply-To: References: Message-ID: <1087315658.40cf1eca1fbde@webmail.abo.fi> Hi, I need momusys mpeg4 codec's C implementation for linux. Can anybody help me with the link? BR Asim From bdv78 mail.ru Tue Jun 15 18:49:47 2004 From: bdv78 mail.ru (Dmitry Briliuk) Date: Tue Jun 15 18:36:17 2004 Subject: [Mp4-tech] [streaming] Video/audio translation over internet Message-ID: <6710730531.20040615174947@mail.ru> Hello, There is a need to perform video(and audio) stream transmission over the internet. Is there a some ready-to-use tools (probably paid) in order just to plug it into the own source code and transmit video? It is desirable to receive video stream both by standard software (Windows Media Player, RealPlayer, etc) and by own software. Is there some COM-interface or API for Windows Media Player, RealPlayer or QuickTime? Is the same possbile for PocketPC platform? -- Best regards, Dmitry From bdv78 mail.ru Tue Jun 15 18:50:11 2004 From: bdv78 mail.ru (Dmitry Briliuk) Date: Tue Jun 15 18:42:05 2004 Subject: [Mp4-tech] [general] which codec to choose Message-ID: <10610753984.20040615175011@mail.ru> Hello, Which codec to choose for video surveillance system? The requirements are: - maintain wide range of quality/speed parameters from high quality to low bandwidth video - store (and search) custom data in the video stream - it will be a benefit when the standard software will understand this codec Is there a some ready-to-use tools (probably paid) in order just to plug it into the own source code and compress/decompress video/audio stream? -- Best regards, Dmitry From Xianbin99 aol.com Tue Jun 15 23:24:13 2004 From: Xianbin99 aol.com (Xianbin99@aol.com) Date: Wed Jun 16 06:34:38 2004 Subject: [Mp4-tech] stream thinning Message-ID: <6b.2c0c8613.2e01094d@aol.com> Hi, there, I am a new comer to this forum. Can anybody give me a brief explanation of the thinning mechanism used in Apple's Darwin streaming server? Thanks, xavier -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040615/29d7c0ef/attachment.html From mihir ti.com Wed Jun 16 19:16:18 2004 From: mihir ti.com (Mody, Mihir) Date: Wed Jun 16 09:07:28 2004 Subject: [Mp4-tech] Regarding H.264 content in MP4 file format Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A74094791@dbde2k01.ent.ti.com> Hi, Where can I find H.264 content in MP4 file format as MPEG4- part 15? Does there are PC based software which supports H.264 encoding as per MPEG4 part 15? Regards, Mihir -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040616/f374ff49/attachment.html From tejasavora rediffmail.com Thu Jun 17 04:52:16 2004 From: tejasavora rediffmail.com (Tejas A Vora) Date: Thu Jun 17 01:51:25 2004 Subject: [Mp4-tech] MPEG 4 Frame Type (I,P,B) Message-ID: <20040617035211.662.qmail@webmail36.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040617/cdba5179/attachment.html -------------- next part -------------- Hi We are creating a software to parse MPEG4 data. Can anyone tell me how to extract the Frame Type (I,P,B) frame type from the whole RTP packet? I mean I have RTP packet with MPEG4 payload in it, then how to extract the Frame type information from it? Thanks, Tejas Vora From oh sait.samsung.co.kr Thu Jun 17 12:37:43 2004 From: oh sait.samsung.co.kr (Eunmi Oh) Date: Thu Jun 17 01:57:57 2004 Subject: [Mp4-tech] [MPEG4 Audio] BSAC Message-ID: <004101c45414$10d79720$2a33024b@MMlab> Skipped content of type multipart/alternative-------------- next part -------------- ER_BSAC Examples ============================= Encoding to fl4 (48 kHz mono @ 64 kbits/s) $MP4AUDVM/mp4auenc -d 1 -m tf -r 64000 -c "-aac_sys_bsac" ${TESTDIR}/m48.au -o ${TESTDIR}/m48_bsac64.fl4 Encoding to fl4 (48 kHz stereo @ 128 kbits/s) $MP4AUDVM/mp4auenc -d 1 -m tf -r 128000 -c "-aac_sys_bsac" ${TESTDIR}/s48.au -o ${TESTDIR}/s48_bsac128.fl4 Decoding of fl4 (using all layers) $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff" ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff" ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au Decoding of fl4 (using only base layer) $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au Conversion to mp4 $MP4AUDVM/fl4_to_mp4 -d 1 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.mp4 $MP4AUDVM/fl4_to_mp4 -d 1 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.mp4 Decoding of mp4 (using all layers) $MP4AUDVM/mp4audec -d 1 -c "-mp4ff" ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -c "-mp4ff" ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au Decoding of mp4 (using only base layer) $MP4AUDVM/mp4audec -d 1 -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au From dgson e2plus.co.kr Thu Jun 17 14:18:51 2004 From: dgson e2plus.co.kr (???) Date: Thu Jun 17 02:02:44 2004 Subject: [Mp4-tech] IPB frames, maybe someone can explain a bit more in detail? Message-ID: Hi We are creating a software to parse MPEG4 data. Can anyone tell me how to extract the Frame Type (I,P,B) frame type from the whole RTP packet? I mean I have RTP packet with MPEG4 payload in it, then how to extract the Frame type information from it? Thanks, Tejas Vora From g0300189 nus.edu.sg Thu Jun 17 16:16:50 2004 From: g0300189 nus.edu.sg (Gu Yan) Date: Thu Jun 17 09:58:50 2004 Subject: [Mp4-tech] Does anybody know what is the lastest status of 3DMC in MPEG-4 ? Message-ID: <956E640BDF0A3B4B973504784433C81325ED28@MBOX22.stu.nus.edu.sg> Hello, Anybody here know the current status of 3DMC (3D mesh coding) in MPEG-4? Is 3DMC still used in MPEG-4? Where can I find the implementation of this coding? Thank you! From tma iis.fhg.de Thu Jun 17 12:03:55 2004 From: tma iis.fhg.de (Herbert Thoma) Date: Thu Jun 17 10:02:34 2004 Subject: [Mp4-tech] MPEG 4 Frame Type (I,P,B) In-Reply-To: <20040617035211.662.qmail@webmail36.rediffmail.com> References: <20040617035211.662.qmail@webmail36.rediffmail.com> Message-ID: <40D15E7B.4080108@iis.fhg.de> vop_coding_type is encoded in the first 2 bits after vop_start_code. vop_start_code is 00 00 01 b6 (hex) vop_coding_type means: 0 0 I VOP 0 1 P VOP 1 0 B VOP 1 1 S VOP Regards, Herbert. Tejas A Vora schrieb: > Hi > > We are creating a software to parse MPEG4 data. Can anyone tell me how to extract the Frame Type (I,P,B) frame type from the whole RTP packet? > > I mean I have RTP packet with MPEG4 payload in it, then how to extract the Frame type information from it? > > Thanks, > Tejas Vora > > > ------------------------------------------------------------------------ > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ From suren4541 hotmail.com Fri Jun 18 01:34:19 2004 From: suren4541 hotmail.com (Surendra) Date: Thu Jun 17 15:56:46 2004 Subject: [Mp4-tech] Motion Estimation used in H.264 reference code Message-ID: Hi, I have downloaded the JVT 8.2 reference source code for H.264 Video Codec from http://bs.hhi.de/~suehring/tml/ to understand how Motion estimation is implemented in the software. I guess I have to study the theory before I debug the code. Is any documentaion available on the Motion estimation technique used in JVT 8.2 ? Thanks Surendra -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040618/091706a3/attachment.html From teruhiko av.crl.sony.co.jp Thu Jun 17 18:18:05 2004 From: teruhiko av.crl.sony.co.jp (Teruhiko Suzuki) Date: Thu Jun 17 18:44:34 2004 Subject: [Mp4-tech] Re: [jvt-experts] Regarding H.264 content in MP4 file format In-Reply-To: <0908EAA859AF3641B7D9BEDAB8DD6A74094791@dbde2k01.ent.ti.com> References: <0908EAA859AF3641B7D9BEDAB8DD6A74094791@dbde2k01.ent.ti.com> Message-ID: <20040617171128.BBC4.TERUHIKO@av.crl.sony.co.jp> Dear Mihir, > Where can I find H.264 content in MP4 file format as MPEG4- part 15? > Does there are PC based software which supports H.264 encoding > as per MPEG4 part 15? I think conformance and software of MP4 for H.264/AVC is the work item of MPEG systems Gp. I think they know the current status of conformance and reference software of MP4. Best Regards, Teruhiko Suzuki Imaging Technology Center, IMNC Sony Corp. TEL: +81-3-5795-7966 FAX: +81-3-5795-8563 From i.g.richardson rgu.ac.uk Fri Jun 18 09:46:19 2004 From: i.g.richardson rgu.ac.uk (i.g.richardson@rgu.ac.uk) Date: Fri Jun 18 06:14:00 2004 Subject: [Mp4-tech] Motion Estimation used in H.264 reference code Message-ID: <80A9EC5F99C0744896728B5579E36D364E4893@EXVS001.rgu.ac.uk> You could have a look at document VCEG-N83 which describes an earlier version of the test model and includes an overview of the motion estimation mechanisms. It's available at HYPERLINK "http://ftp3.itu.ch/av-arch/video-site/0109_San/"http://ftp3.itu.ch/av-arch/video-site/0109_San/ Regards Iain Richardson -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Surendra Sent: 17 June 2023 20:04 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Motion Estimation used in H.264 reference code Hi, I have downloaded the JVT 8.2 reference source code for H.264 Video Codec from HYPERLINK "http://bs.hhi.de/~suehring/tml/"http://bs.hhi.de/~suehring/tml/ to understand how Motion estimation is implemented in the software. I guess I have to study the theory before I debug the code. Is any documentaion available on the Motion estimation technique used in JVT 8.2 ? Thanks Surendra --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.701 / Virus Database: 458 - Release Date: 07/06/2023 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.701 / Virus Database: 458 - Release Date: 07/06/2023 -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040618/7c4d506d/attachment.html From deborah sj.co.uk Fri Jun 18 15:09:54 2004 From: deborah sj.co.uk (Deborah Crook) Date: Fri Jun 18 09:49:47 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: <40CEB78D.8060708@codingtechnologies.com> References: <40CEB78D.8060708@codingtechnologies.com> Message-ID: <20040618140831.Y61409@newephebe.sj.co.uk> On Tue, 15 Jun 2004, Andreas Schneider wrote: > Hello, > > assuming you mean HE AAC conformance streams, they can be found on the > FhG ftp server in the subdirectory > mpeg4audio-conformance/compressedMp4/sbr_new. > > Regards, > > Andreas > > Naga Raju B.V.S. wrote: > > Hi, > > > > > > > > Can you please tell where can I get HE AAC test streams. > > > > > > > > Thanks in advance, Is there a publicly-available document anywhere that specifies the content of these streams? Thanks, Deborah From snd codingtechnologies.com Fri Jun 18 17:29:37 2004 From: snd codingtechnologies.com (snd@codingtechnologies.com) Date: Fri Jun 18 13:53:31 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: <20040618140831.Y61409@newephebe.sj.co.uk> Message-ID: Deborah, the output document of the 68th meeting N6468 contains among other things the most recent description of the content of the HE-AAC conformance bitstreams. Regards, Andreas Schneider Deborah Crook wrote on 18/06/2023 03:09:54 PM: > On Tue, 15 Jun 2004, Andreas Schneider wrote: > > > Hello, > > > > assuming you mean HE AAC conformance streams, they can be found on the > > FhG ftp server in the subdirectory > > mpeg4audio-conformance/compressedMp4/sbr_new. > > > > Regards, > > > > Andreas > > > > Naga Raju B.V.S. wrote: > > > Hi, > > > > > > > > > > > > Can you please tell where can I get HE AAC test streams. > > > > > > > > > > > > Thanks in advance, > > Is there a publicly-available document anywhere that specifies the content > of these streams? > > Thanks, > Deborah From deborah sj.co.uk Fri Jun 18 16:43:17 2004 From: deborah sj.co.uk (Deborah Crook) Date: Fri Jun 18 13:58:36 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: References: Message-ID: <20040618154229.G61409@newephebe.sj.co.uk> On Fri, 18 Jun 2023 snd@codingtechnologies.com wrote: > Deborah, > > the output document of the 68th meeting N6468 contains among other things > the most recent description of the content of the HE-AAC conformance > bitstreams. > > Regards, > > Andreas Schneider Thanks. Is that available online anywhere? I'm not an MPEG member, so don't have access to their server. Deborah From snd codingtechnologies.com Fri Jun 18 18:39:43 2004 From: snd codingtechnologies.com (snd@codingtechnologies.com) Date: Fri Jun 18 14:03:48 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: <20040618154229.G61409@newephebe.sj.co.uk> Message-ID: Deborah, no, this document is only available to MPEG members. Regards, Andreas Schneider Deborah Crook wrote on 18/06/2023 04:43:17 PM: > On Fri, 18 Jun 2023 snd@codingtechnologies.com wrote: > > > Deborah, > > > > the output document of the 68th meeting N6468 contains among other things > > the most recent description of the content of the HE-AAC conformance > > bitstreams. > > > > Regards, > > > > Andreas Schneider > > Thanks. Is that available online anywhere? I'm not an MPEG member, so don't > have access to their server. > > Deborah From snd codingtechnologies.com Sat Jun 19 22:20:51 2004 From: snd codingtechnologies.com (snd@codingtechnologies.com) Date: Sat Jun 19 17:17:23 2004 Subject: [Mp4-tech] HE AAC test streams In-Reply-To: Message-ID: Deborah, I have to correct myself: actually it is currently publicly available since it's a draft under ballot.Find it at http://www.itscj.ipsj.or.jp/sc29/open/29view/29n5909t.doc Regards, Andreas Schneider mp4-tech-bounces@lists.mpegif.org wrote on 18/06/2023 05:39:43 PM: > Deborah, > > no, this document is only available to MPEG members. > > Regards, > > Andreas Schneider > > Deborah Crook wrote on 18/06/2023 04:43:17 PM: > > > On Fri, 18 Jun 2023 snd@codingtechnologies.com wrote: > > > > > Deborah, > > > > > > the output document of the 68th meeting N6468 contains among other > things > > > the most recent description of the content of the HE-AAC conformance > > > bitstreams. > > > > > > Regards, > > > > > > Andreas Schneider > > > > Thanks. Is that available online anywhere? I'm not an MPEG member, so > don't > > have access to their server. > > > > Deborah > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate identifier to > indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at http://www.mpegif.org/public/documents/vault/mp- > out-30042-Antitrust.php From Alptekin.Temizel visioprime.com Mon Jun 21 17:17:48 2004 From: Alptekin.Temizel visioprime.com (Alptekin.Temizel@visioprime.com) Date: Mon Jun 21 12:28:49 2004 Subject: [Mp4-tech] [video] Scalability Message-ID: As far as I understand, MPEG-4 standard defines both temporal and spatial scalability, but I failed to find any implementation claiming to be doing scalable encoding. Does anyone know any MPEG-4 encoder with scalability implementation? What we need to do is to decompress a lower resolution (or lower fps) sequence in some cases (because of the processing power limitations). However this doesn't seem to be possible unless two separate compressor is used. (For instance, in the case of a D1 video, odd-fields and even-fields could be compressed using individual compressor and streams could be stored separately and when there isn't enough processing power only odd -or even- fields are decompressed and displayed). I would appreciate any pointers and/or ideas regarding the scalability aspects. Thanks in advance, Alptekin Temizel ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ From ralph.sperschneider iis.fraunhofer.de Mon Jun 21 20:46:44 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Jun 21 16:37:49 2004 Subject: [Mp4-tech] Re: A Clarification abt HQ Audio Profile... In-Reply-To: <4FC99DFBEFD0D211888F0090272B96E307A76361@us-sj-xmsg-4.am.sony.com> References: <4FC99DFBEFD0D211888F0090272B96E307A76361@us-sj-xmsg-4.am.sony.com> Message-ID: <40D71F04.9080504@iis.fraunhofer.de> Visharam, Mohammed wrote: > Hello Ralph, > I need a quick clarification from you regarding the High Quality Profile in > MPEG. I really appreciate ur help... > > 1. Which document can I find the description for High Quality Audio Profile? > I have 14496-3: 2001 and was looking at (29n43661). Is this the > right document.? or is there a more recent version. > > Mainly I would like to know about the High Quality Audio Profile(especially > the audioProfileLevelIndication values). > > Where can I obtain this value from? > > Appreciate your help > Best regards, > -------------------------------------------------- > Mohammed Zubair V, > MPD/PTCA, > Sony Electronics, Inc. Dear Mohamed, the audioProfileLevelIndication values can be found in ISO/IEC 14496-3:2001/Cor 1:2002 (available via ISO). BTW: The most recent version of the MPEG-4 Audio standard is currently SC29/N6006, the mentioned Cor. is already integrated there. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From tihohod mail.ru Tue Jun 22 01:08:08 2004 From: tihohod mail.ru (Stanislav Tihohod) Date: Mon Jun 21 16:39:13 2004 Subject: [Mp4-tech] YUV422 viewer Message-ID: <605124046.20040622000808@mail.ru> Dear Sandip, I've added the support of YUV422 to YUV Player Deluxe. By the way, my program should work under NT4 SP6 now. Also minor improvements in its interface. See http://www.yuvplayer.com. -- Best regards, Stanislav mailto:tihohod@mail.ru From saptarshi_bec yahoo.com Mon Jun 21 23:34:34 2004 From: saptarshi_bec yahoo.com (Saptarshi Ghosh) Date: Tue Jun 22 04:53:04 2004 Subject: [Mp4-tech] [Audio] AAC test streams Message-ID: <20040622053434.37630.qmail@web21203.mail.yahoo.com> Hi all, Could anyone please tell me how to get AAC audio test streams having CCE, CPE and either ADIF header or raw data blocks only (NOT MP4)? Regards, Saptarshi __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail From tejasavora rediffmail.com Tue Jun 22 06:34:39 2004 From: tejasavora rediffmail.com (Tejas A Vora) Date: Tue Jun 22 04:55:42 2004 Subject: [Mp4-tech] Streaming MPEG Server Message-ID: <20040622053435.31477.qmail@webmail45.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040622/9400c246/attachment.html -------------- next part -------------- Hi All, For testing my program that takes Mpeg streaming video as input, I am looking to access a streaming mpeg server with the following features: 1. Serves mpeg streams containing I and P frames, over RTP and/or 2. has RTCP protocol implemented. I will be thankful if anyone can point me to publicly or commercially available server software or accessible servers on the Internet, with the above features. Thanks, Tejas VOra From i.g.richardson rgu.ac.uk Tue Jun 22 10:45:51 2004 From: i.g.richardson rgu.ac.uk (i.g.richardson@rgu.ac.uk) Date: Tue Jun 22 06:30:13 2004 Subject: [Mp4-tech] [video] Scalability Message-ID: <80A9EC5F99C0744896728B5579E36D364E48B3@EXVS001.rgu.ac.uk> I'm not aware of any commercial implementations of scalable MPEG-4 coding (but if you find any, I would be very interested in the details !) Regards Iain Richardson www.vcodex.com -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Alptekin.Temizel@visioprime.com Sent: 21 June 2023 16:18 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [video] Scalability As far as I understand, MPEG-4 standard defines both temporal and spatial scalability, but I failed to find any implementation claiming to be doing scalable encoding. Does anyone know any MPEG-4 encoder with scalability implementation? What we need to do is to decompress a lower resolution (or lower fps) sequence in some cases (because of the processing power limitations). However this doesn't seem to be possible unless two separate compressor is used. (For instance, in the case of a D1 video, odd-fields and even-fields could be compressed using individual compressor and streams could be stored separately and when there isn't enough processing power only odd -or even- fields are decompressed and displayed). I would appreciate any pointers and/or ideas regarding the scalability aspects. Thanks in advance, Alptekin Temizel ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.701 / Virus Database: 458 - Release Date: 07/06/2023 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.701 / Virus Database: 458 - Release Date: 07/06/2023 From aji phreaker.net Tue Jun 22 20:28:55 2004 From: aji phreaker.net (Aji) Date: Tue Jun 22 11:02:06 2004 Subject: [Mp4-tech] MJPEG Type B Files Message-ID: Hi, Can I know where I can get MJPEG type B test files. Is it available in some specific site. Or can any one help me with a few files. TIA Aji From raghu vidiator.com Tue Jun 22 18:22:54 2004 From: raghu vidiator.com (Raaghu Nagaraj) Date: Wed Jun 23 02:05:20 2004 Subject: [Mp4-tech] MPEG-J Message-ID: <787ED0EC136B854DB341E7662D666CD6A1D076@bels002.mediator.com> I was wondering about the status of MPEG-J. Specifically whether it has gained traction in the Industry, whether it has gained foothold on handsets etc? >From what I understand, it is a Java API that allows applications to render MPEG streams. Is this correct? ------------------------------------------------------------------------ ---- Raghavendra Nagaraj Research Engineer Vidiator Technology (US) Inc. 10900 NE 8th St, Suite 600 Bellevue, WA 98004. USA. www.vidiator.com Telephone: 1.425.688.8811 x2153 Email: raaghun@vidiator.com This e-mail message (including any attachment) is intended only for the personal use of the recipient(s) named above. This message is confidential and may be legally privileged. If you are not an intended recipient, you may not review, copy or distribute this message. If you have received this communication in error, please notify us immediately by e-mail and delete the original message. Any views or opinions expressed in this message are those of the author only. Furthermore, this message including any attachment does not create any legally binding rights or obligations whatsoever, which may only be created by the exchange of hard copy documents signed by a duly authorized representative of Vidiator Technology (US) Inc. ------------------------------------------------------------------------ ---- -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040622/0f202231/attachment.html From maheshm_patil2004 yahoo.com Wed Jun 23 04:13:29 2004 From: maheshm_patil2004 yahoo.com (Mahesh Patil) Date: Wed Jun 23 07:59:31 2004 Subject: [Mp4-tech] new to AAC In-Reply-To: <40D71F04.9080504@iis.fraunhofer.de> Message-ID: <20040623101329.39786.qmail@web50005.mail.yahoo.com> To All, I am new to AAC and we are implementing LC-AAC decoder.I wanted to know where can i start from ? I wanted to know the path for the source code (publicly available) and the test conformance stream.I also wanted some good documents on AAC. Thanks and Regards Mahesh Ralph Sperschneider wrote: Visharam, Mohammed wrote: > Hello Ralph, > I need a quick clarification from you regarding the High Quality Profile in > MPEG. I really appreciate ur help... > > 1. Which document can I find the description for High Quality Audio Profile? > I have 14496-3: 2001 and was looking at (29n43661). Is this the > right document.? or is there a more recent version. > > Mainly I would like to know about the High Quality Audio Profile(especially > the audioProfileLevelIndication values). > > Where can I obtain this value from? > > Appreciate your help > Best regards, > -------------------------------------------------- > Mohammed Zubair V, > MPD/PTCA, > Sony Electronics, Inc. Dear Mohamed, the audioProfileLevelIndication values can be found in ISO/IEC 14496-3:2001/Cor 1:2002 (available via ISO). BTW: The most recent version of the MPEG-4 Audio standard is currently SC29/N6006, the mentioned Cor. is already integrated there. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040623/920064e0/attachment.html From ralph.sperschneider iis.fraunhofer.de Mon Jun 21 13:32:23 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 23 08:01:35 2004 Subject: [Mp4-tech] Re: [Audio] ADTS In-Reply-To: <20040614090117.66649.qmail@web21202.mail.yahoo.com> References: <20040614090117.66649.qmail@web21202.mail.yahoo.com> Message-ID: <40D6B937.4010109@iis.fraunhofer.de> Saptarshi Ghosh wrote: > Hi all, > Could anyone please answer the following two > questions: > > Question 1. > Is it necessary to overlap/add the raw data blocks in > a SINGLE ADTS frame with the raw data blocks in any > other frame or can the data in a SINGLE frame be > decoded independently ? not the raw data blocks but the 2048 decoded samples need to be processed using overlap and add. This is true for AAC independently on the transport or storage format. It is due to the nature of the MDCT/IMDCT. > > Question 2. > For crc checking, CRC16 polynomial 0x1021 is used. In > this respect, please clarify the following parameters > of the crc algorithm used: > > 1. Initial value of 16-bit register when the algorithm > starts > 2. Whether each byte is reflected before it is > processed > 3. Whether the final register value is to be reflected > 4. Whether any 16-bit number is to be XORed to the > final register value > 5. The checksum for the data string "123456789" as > produced by this algorithm. I would suggst that you check out the example implementation available in the referene software. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Mon Jun 21 14:45:59 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 23 08:05:31 2004 Subject: [Mp4-tech] Re: [Audio] About AAC Audio Streaming In-Reply-To: <287265593.08220@mails.tsinghua.edu.cn> References: <287265593.08220@mails.tsinghua.edu.cn> Message-ID: <40D6CA77.6060507@iis.fraunhofer.de> Li Zhengming wrote: > Dear all, > > I'm testing streaming mp4 with aac audio now. I encode a two-channel wav file into > an aac file with ADTS header. Then I try to listen to this aac file with some aac > decoders, it's ok and both two channels are present. But when I create a mp4 file > with this aac file using mp4creator60 of the MPEG4IP project, and stream it with > Darwin Server, the player can only give me the left channel. I have tried many > files with two channels, and the results are the same. A two channel signal is usually coded using a channel_pair_element(). It is almost impossible to extract just one channel out of this channel_pair_element(), when manipulating the data only in the coded domain. Thus, the channel_pair_element() is most likely also in the second case present and is being decoded using the AAC decoder. It is most likely just not rendered. This might be due to wrong settings in the AudioSpecificInfo(), which needs to be created at the time of the conversion from adts to mp4ff. Hope this helps, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Wed Jun 23 19:20:20 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Jun 23 14:54:16 2004 Subject: [Mp4-tech] Re: [Audio] AAC test streams In-Reply-To: <20040622053434.37630.qmail@web21203.mail.yahoo.com> References: <20040622053434.37630.qmail@web21203.mail.yahoo.com> Message-ID: <40D9ADC4.1020007@iis.fraunhofer.de> Saptarshi Ghosh wrote: > Hi all, > Could anyone please tell me how to get AAC audio test > streams having CCE, CPE and either ADIF header or raw > data blocks only (NOT MP4)? > > Regards, > Saptarshi > Look at: ftp://mpaudconf:adif2mp4@ftp.iis.fraunhofer.de/mpeg2aac-conformance/compressedAdif/ Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From mikael sevenier.com Wed Jun 23 10:27:00 2004 From: mikael sevenier.com (Mikael Bourges-Sevenier) Date: Wed Jun 23 15:01:07 2004 Subject: [Mp4-tech] MPEG-J In-Reply-To: <787ED0EC136B854DB341E7662D666CD6A1D076@bels002.mediator.com> Message-ID: <200406231627.i5NGR2Et020433@lists1.magma.ca> Dear Raghavendra, MPEG-J was finalized about 2 years ago. It has been designed to allow programmatic control of an MPEG-4 terminal resources. Using Java and MPEG-J API, one can control network access, decoders, and the scene. From a presentation point of view, MPEG-J doesn't render MPEG-4 streams but allow you to control what is rendered. Recently (since March), a new activity has started called MPEG-4 Part 21 "MPEG-J extensions for rendering" whose goal is to allow a Java application to access directly the rendering resources and hence control more finely what is rendered on screen. This activity has been triggered following the requirements of various industries and in particular the mobile industry. Kind regards, Mikael Bourges-Sevenier VP & CTO, Mindego Inc. Chair, MPEG SNHC 5201 Great America Parkway, Suite 320 Santa Clara, CA 95054, USA tel: +1 408.873-1694 _____ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Raaghu Nagaraj Sent: Tuesday, June 22, 2023 5:23 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] MPEG-J I was wondering about the status of MPEG-J. Specifically whether it has gained traction in the Industry, whether it has gained foothold on handsets etc? >From what I understand, it is a Java API that allows applications to render MPEG streams. Is this correct? ---------------------------------------------------------------------------- Raghavendra Nagaraj Research Engineer Vidiator Technology (US) Inc. 10900 NE 8th St, Suite 600 Bellevue, WA 98004. USA. www.vidiator.com Telephone: 1.425.688.8811 x2153 Email: raaghun@vidiator.com This e-mail message (including any attachment) is intended only for the personal use of the recipient(s) named above. This message is confidential and may be legally privileged. If you are not an intended recipient, you may not review, copy or distribute this message. If you have received this communication in error, please notify us immediately by e-mail and delete the original message. Any views or opinions expressed in this message are those of the author only. Furthermore, this message including any attachment does not create any legally binding rights or obligations whatsoever, which may only be created by the exchange of hard copy documents signed by a duly authorized representative of Vidiator Technology (US) Inc. ---------------------------------------------------------------------------- -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040623/c665c012/attachment.html From singer apple.com Wed Jun 23 15:36:50 2004 From: singer apple.com (Dave Singer) Date: Wed Jun 23 18:35:35 2004 Subject: [Mp4-tech] MPEG4 video + AMR audio In-Reply-To: <40BC2B06.6030209@neomagic.com> References: <40BC2B06.6030209@neomagic.com> Message-ID: At 12:36 PM +0530 6/1/04, rchawla wrote: >Is a file writer reference software available on the net which can >save MPEG4 video+AMR audio in a .mp4 file? well, AMR isn't strictly an MPEG-4 codec, so QuickTime will save this only in a .3GP file (which happens to be structurally the same as MP4 for all intents and purposes). > >Thanks for any help/suggestions. > >Regards, >Rana > >_______________________________________________ >NOTE: Please use clear subject lines for your posts. Include [audio, >[video], [systems], [general] or another apppropriate identifier to >indicate the type of question you have. > >Note: Conduct on the mailing list is subject to the Antitrust >guidelines found at >http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- David Singer Apple Computer/QuickTime From yswapna2004 hotmail.com Wed Jun 23 16:34:59 2004 From: yswapna2004 hotmail.com (Yeleswarapu Swapna Prasad) Date: Thu Jun 24 01:54:59 2004 Subject: [Mp4-tech] About Mpeg4 Message-ID: Hi everyone, I am doing a thesis on MPEG4 implementation. I wanted to know where i could download a codec for the same that would work on Windows. I would also appreciate if someone could tell me about how to run the codec. Any kind of help in this matter would be greatly appreciated. Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040623/23c29444/attachment.html From pablo ximpo.com Thu Jun 24 03:03:05 2004 From: pablo ximpo.com (Pablo 'merKur' Kohan) Date: Thu Jun 24 02:00:30 2004 Subject: [Mp4-tech] MPEG4 video + AMR audio In-Reply-To: <40BC2B06.6030209@neomagic.com> References: <40BC2B06.6030209@neomagic.com> Message-ID: <40DA0C29.5010906@ximpo.com> rchawla wrote: > Is a file writer reference software available on the net which can > save MPEG4 video+AMR audio in a .mp4 file? We (Ximpo) have added support for AMR-NB, AMR-WB, and H.263 in MPEG4IP (on .3gp files). You can check it: http://mpeg4ip.sf.net/ PS: It was done some months ago on the 1.0 release, and the merge into 1.1 is on its way. -- ____________________________ ________ _______________________________ | Pablo 'merKur' Kohan \ \ / | | Founder, CTO \ \/ To bring IN-OVATION turn to | | mailto:pablo@ximpo.com /\ \ your open source of solutions | | Phone: +972-544-225371 / \ \ | | Fax: +972-151-544-225371 -------- http://www.ximpo.com/ | |__________________________ Ximpo Group _____________________________| From oamato wanadoo.fr Thu Jun 24 11:21:00 2004 From: oamato wanadoo.fr (Olivier Amato) Date: Thu Jun 24 11:23:57 2004 Subject: [Mp4-tech] MPEG-4 AVC vs. MPEG-21 SVC Message-ID: <003a01c459c4$39a938b0$0a00000a@tototxoxqlsjoa> Dear experts, I'm looking for comparison testings between MPEG-4 AVC Main Profile and MPEG-21 SVC wavelett-based codec ( for broadcast and D-Cinema applications ). Has anybody seen such comparisons yet ? Thanks in advance. Olivier From ralph.sperschneider iis.fraunhofer.de Thu Jun 24 15:52:30 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Thu Jun 24 11:29:20 2004 Subject: [Mp4-tech] Re: Could not find AAC test streams as indicated In-Reply-To: <20040624055556.43622.qmail@web21202.mail.yahoo.com> References: <20040624055556.43622.qmail@web21202.mail.yahoo.com> Message-ID: <40DACE8E.50601@iis.fraunhofer.de> Saptarshi Ghosh wrote: >>Saptarshi Ghosh wrote: >> >> Hi all, >> Could anyone please tell me how to get AAC audio >>test streams having CCE, CPE and either ADIF header > > or raw data blocks only (NOT MP4)? > >> >> >>Ralph wrote >>Look at: >> > > ftp://mpaudconf:adif2mp4@ftp.iis.fraunhofer.de/mpeg2aac-conformance/compressedAdif/ > >>Ralph >> > > > Hello Ralph, > > Thank you for your response. > But I could not download any files from the above > link. when I open the link using Windows Explorer, I > see the names of many audio files, but when I try to > download any of the files, there occurs the error - NO > SUCH FILE OR DIRECTORY. > > Also, if I use ftp to connect to the above server (as > anonymous user), I cannot find any directory named > mpeg2acc-conformance. Please clarify. > > Thanks in advance, > Regards, > Saptarshi. > The server cannot be accessed using IE, there is a known incompatibility. As anonymous user you cannot access the test sequences. As obvious from the URL I sent you, the user is mpaudconf and the password is adif2mp4. Hope this helps, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From swhong cs.hku.hk Fri Jun 25 00:52:28 2004 From: swhong cs.hku.hk (swhong@cs.hku.hk) Date: Thu Jun 24 12:17:10 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format Message-ID: <1088092348.40daf8bc5a106@intranet.csis.hku.hk> Dear all, I'm trying to add G.723 compressed audio stream to the MP4 formatted file. I can't find the part-3 of the Standard talks about this kind of audio codec. Would anybody here advise me the audio object code for G.723, and also I would like to know what kind of standard player under Windows XP can be used to playback MP4 file with G.723 audio MP4 file. Thanks in advance. -- Philip ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/ From ohm ient.rwth-aachen.de Thu Jun 24 19:19:13 2004 From: ohm ient.rwth-aachen.de (Jens-Rainer Ohm) Date: Thu Jun 24 17:55:17 2004 Subject: [Mp4-tech] MPEG-4 AVC vs. MPEG-21 SVC In-Reply-To: <003a01c459c4$39a938b0$0a00000a@tototxoxqlsjoa> Message-ID: <000001c45a06$fcfeff10$2827e289@OHM2> Dear Olivier, a report exists which should be available as public document from MPEG (N6383- Subjective test results for the CfP on Scalable Video Coding Technology). This does however not really cover the application domains you are mentioning. You should be aware that MPEG-21 SVC is at the very beginning of a standardization process, where some of the technology proposed in the CfP (wavelet-based is one option) is presently investigated in Core Experiments. Best regards, Jens > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Olivier Amato > Sent: Thursday, June 24, 2023 10:21 AM > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] MPEG-4 AVC vs. MPEG-21 SVC > > > Dear experts, > > I'm looking for comparison testings between MPEG-4 AVC Main > Profile and MPEG-21 SVC wavelett-based codec ( for broadcast > and D-Cinema applications ). Has anybody seen such > comparisons yet ? Thanks in advance. > > Olivier > > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php From mihir ti.com Thu Jun 24 23:26:54 2004 From: mihir ti.com (Mody, Mihir) Date: Thu Jun 24 18:01:17 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A742F77CD@dbde2k01.ent.ti.com> Hi Philip, The MP4 format doesn't support G.723. You should look at other format like QTtime (.mov) Regards, Mihir -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of swhong@cs.hku.hk Sent: Thursday, June 24, 2023 9:22 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format Dear all, I'm trying to add G.723 compressed audio stream to the MP4 formatted file. I can't find the part-3 of the Standard talks about this kind of audio codec. Would anybody here advise me the audio object code for G.723, and also I would like to know what kind of standard player under Windows XP can be used to playback MP4 file with G.723 audio MP4 file. Thanks in advance. -- Philip ------------------------------------------------- This mail sent through IMP: http://horde.org/imp/ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From udhb5 umkc.edu Thu Jun 24 15:46:05 2004 From: udhb5 umkc.edu (Damodaran, Usha (UMKC-Student)) Date: Thu Jun 24 18:06:44 2004 Subject: FW: [Mp4-tech] About Mpeg4 Message-ID: <051D9E794E394F4B8A03A2FC4F234D78026331ED@KC-MAIL4.kc.umkc.edu> ________________________________ From: Yeleswarapu Swapna Prasad [mailto:yswapna2004@hotmail.com] Sent: Thu 6/24/2004 2:41 PM To: Damodaran, Usha (UMKC-Student) Subject: Re: [Mp4-tech] About Mpeg4 Hi, I have tried that codec, but am not able to work with it. Also, I was looking for a codec without FGS. I am having a lot of difficulties working with it. Can some one please help me. Thanks. Swapna ----- Original Message ----- From: "Damodaran, Usha (UMKC-Student)" To: "Yeleswarapu Swapna Prasad" Sent: Thursday, June 24, 2023 11:36 AM Subject: RE: [Mp4-tech] About Mpeg4 You can check this link: http://megaera.ee.nctu.edu.tw/mpeg/Ref_Software/cd_software_with_FGS/ this is supposed to have the latest error free mpeg-4 video codec software which can run on windows. once you download this code, you will know how to run etc. ________________________________ From: mp4-tech-bounces@lists.mpegif.org on behalf of Yeleswarapu Swapna Prasad Sent: Wed 6/23/2004 5:34 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] About Mpeg4 Hi everyone, I am doing a thesis on MPEG4 implementation. I wanted to know where i could download a codec for the same that would work on Windows. I would also appreciate if someone could tell me about how to run the codec. Any kind of help in this matter would be greatly appreciated. Thanks. From udhb5 umkc.edu Thu Jun 24 18:14:15 2004 From: udhb5 umkc.edu (Damodaran, Usha (UMKC-Student)) Date: Fri Jun 25 03:44:39 2004 Subject: [Mp4-tech] (video) Mpeg4 Ref code Message-ID: <051D9E794E394F4B8A03A2FC4F234D78026331EF@KC-MAIL4.kc.umkc.edu> Hi, I am trying to use the MPEG4 reference code from Microsoft. The encoder encodes only first 8 frames of the video (.yuv) input. Is the encoder designed that way or is there any parameter that can be changed to change that? Any pointers to this would be greatly appreciated. Thank you, Usha From rob.koenen mpegif.org Fri Jun 25 10:47:36 2004 From: rob.koenen mpegif.org (Rob Koenen (MPEGIF)) Date: Fri Jun 25 04:18:23 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format In-Reply-To: <0908EAA859AF3641B7D9BEDAB8DD6A742F77CD@dbde2k01.ent.ti.com> Message-ID: <000601c45a88$af3f2660$0300a8c0@corp.intertrust.com> Mhihir, thanks for the response. To add to this, Part 3 of MPEG-4 (MPEG-4 Audio) indeed does not support G.723. The MP4 file format does not support it natively, but it is possible to register private object types and put them in an MP4 file. The MP4 file format and the MPEG-4 standard are sometimes seen as equivalent, especially in the press, but MP4 is really a part of the larger MPEG-4 standard. To be precise, MPEG-4 Part 12 gives the base text for the ISO Media File format, and part 14 gives the MPEG-4 specific extensions. Over time, the MP4 file format has found uses outside of MPEG-4 (3GPP, JPEG2000) and that's why MPEG has separated out the generics from the MPEG-4 specifics, even though these two parts are technically still both a part of MPEG-4. An AVC-specific extension is also being drafted (part 15). Best, Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Mody, Mihir > Sent: Thursday, 24 June 2023 18:57 > To: swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Hi Philip, > > The MP4 format doesn't support G.723. You should look at > other format like QTtime (.mov) > > Regards, > Mihir > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of > swhong@cs.hku.hk > Sent: Thursday, June 24, 2023 9:22 PM > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Dear all, > > I'm trying to add G.723 compressed audio stream to the MP4 > formatted file. I > can't find the part-3 of the Standard talks about this kind > of audio codec. > Would anybody here advise me the audio object code for G.723, > and also I would > like to know what kind of standard player under Windows XP > can be used to > playback MP4 file with G.723 audio MP4 file. > > Thanks in advance. > > -- Philip > > > ------------------------------------------------- > This mail sent through IMP: http://horde.org/imp/ > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From Dakshinamoorthy.R lntinfotech.com Fri Jun 25 14:33:34 2004 From: Dakshinamoorthy.R lntinfotech.com (Dakshinamoorthy R) Date: Fri Jun 25 04:19:26 2004 Subject: [Mp4-tech] (video) Mpeg4 Ref code Message-ID: HI, you can see a config file in reference encoder, change the parameter for number of frame in config file, Now it will encode as per the frame count set by you. ( the frame count should be less then or equal to the frame count of your input YUV file) Regards, R.Dakshinamoorthy Project Leader, DSP- Group, Embedded System, L&T Infotech Ltd, Chennai. INDIA Phone +91 44 22527072 Fax +91 44 22523514 This document is classified as : ( ) L&T Infotech Proprietary & Confidential ( ) L&T Infotech Confidential ( X) L&T Infotech Internal Use only ( ) L&T Infotech General Business Information "Damodaran, Usha \(UMKC-Student\)" Sent by: mp4-tech-bounces@lists.mpegif.org 25/06/2023 03:44 AM To: "Damodaran, Usha \(UMKC-Student\)" , cc: Subject: [Mp4-tech] (video) Mpeg4 Ref code Hi, I am trying to use the MPEG4 reference code from Microsoft. The encoder encodes only first 8 frames of the video (.yuv) input. Is the encoder designed that way or is there any parameter that can be changed to change that? Any pointers to this would be greatly appreciated. Thank you, Usha _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php ______________________________________________________________________ ______________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040625/e79d62a7/attachment.html From dipankar.mitra lgsoftindia.com Fri Jun 25 15:05:41 2004 From: dipankar.mitra lgsoftindia.com (Dipankar Mitra) Date: Fri Jun 25 05:51:59 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format Message-ID: Hi Rob, Regarding ... "but it is possible to register private object types and put them in an MP4 file." Does this mean that I can add any audio codec as a private object type and still call it an MP4 file (.mp4 extension)? How will other players (which do not support the audio codec) understand that the audio content is to be ignored? Regards, Dipankar -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Rob Koenen (MPEGIF) Sent: Friday, June 25, 2023 1:18 PM To: 'Mody, Mihir'; swhong@cs.hku.hk; mp4-tech@lists.mpegif.org Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format Mhihir, thanks for the response. To add to this, Part 3 of MPEG-4 (MPEG-4 Audio) indeed does not support G.723. The MP4 file format does not support it natively, but it is possible to register private object types and put them in an MP4 file. The MP4 file format and the MPEG-4 standard are sometimes seen as equivalent, especially in the press, but MP4 is really a part of the larger MPEG-4 standard. To be precise, MPEG-4 Part 12 gives the base text for the ISO Media File format, and part 14 gives the MPEG-4 specific extensions. Over time, the MP4 file format has found uses outside of MPEG-4 (3GPP, JPEG2000) and that's why MPEG has separated out the generics from the MPEG-4 specifics, even though these two parts are technically still both a part of MPEG-4. An AVC-specific extension is also being drafted (part 15). Best, Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Mody, Mihir > Sent: Thursday, 24 June 2023 18:57 > To: swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Hi Philip, > > The MP4 format doesn't support G.723. You should look at > other format like QTtime (.mov) > > Regards, > Mihir > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of > swhong@cs.hku.hk > Sent: Thursday, June 24, 2023 9:22 PM > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Dear all, > > I'm trying to add G.723 compressed audio stream to the MP4 > formatted file. I > can't find the part-3 of the Standard talks about this kind > of audio codec. > Would anybody here advise me the audio object code for G.723, > and also I would > like to know what kind of standard player under Windows XP > can be used to > playback MP4 file with G.723 audio MP4 file. > > Thanks in advance. > > -- Philip > > > ------------------------------------------------- > This mail sent through IMP: http://horde.org/imp/ > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From bautz bsoft.info Fri Jun 25 12:26:00 2004 From: bautz bsoft.info (stefano battista) Date: Fri Jun 25 05:54:09 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format References: <000601c45a88$af3f2660$0300a8c0@corp.intertrust.com> Message-ID: <00c601c45a96$6e30e970$0c72a8c0@Bsoft004> dear Mihir, Rob, and all-- just to add a short note... on the 3GP side (I know Rob, this has nothing to do with MPEG :) the Technical Spec 26.234, e.g. version 5.6.0, publicly available from www.3gpp.org, tells how to "extend the ISO file format the 3GP way" to codecs such as H.263 Video and AMR-NB Audio, but does not cover G.723, even though this is the format for video-communication adopted by 3GP... regards, --Stefano --Stefano Battista bSoft -- www.bsoft.info tel/fax +39-0733-261845 mobile +39-335-7213624 ----- Original Message ----- From: "Rob Koenen (MPEGIF)" To: "'Mody, Mihir'" ; ; Sent: Friday, June 25, 2023 9:47 AM Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > Mhihir, > > thanks for the response. To add to this, Part 3 of MPEG-4 (MPEG-4 Audio) > indeed does not support G.723. The MP4 file format does not support it > natively, but it is possible to register private object types and put them > in an MP4 file. > > The MP4 file format and the MPEG-4 standard are sometimes seen as > equivalent, especially in the press, but MP4 is really a part of the larger > MPEG-4 standard. > > To be precise, MPEG-4 Part 12 gives the base text for the ISO Media File > format, and part 14 gives the MPEG-4 specific extensions. Over time, the MP4 > file format has found uses outside of MPEG-4 (3GPP, JPEG2000) and that's why > MPEG has separated out the generics from the MPEG-4 specifics, even though > these two parts are technically still both a part of MPEG-4. > > An AVC-specific extension is also being drafted (part 15). From rob.koenen mpegif.org Fri Jun 25 15:50:34 2004 From: rob.koenen mpegif.org (Rob Koenen (MPEGIF)) Date: Fri Jun 25 09:41:43 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format In-Reply-To: Message-ID: <000001c45ab3$021eb830$0300a8c0@corp.intertrust.com> You can put a lot of stuff in an MPEG-4 stream or an MP4 file that is not MPEG-4 itself. Whether the resulting stream/file is still MPEG-4 compliant is a matter of definition ... you can make it comply to the Systems (MP4) syntax, but it won't be co,pliant to the codec specs. Whether that's a problem is up to you. Other players would be able to tell that they don't understand the object type. Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Dipankar Mitra > Sent: Friday, 25 June 2023 10:36 > To: mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Hi Rob, > Regarding ... "but it is possible to register private object > types and put them in an MP4 file." > > Does this mean that I can add any audio codec as a > private object type and still call it an MP4 file (.mp4 > extension)? How will other players (which do not support the > audio codec) understand that the audio content is to be ignored? > Regards, > Dipankar > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Rob > Koenen (MPEGIF) > Sent: Friday, June 25, 2023 1:18 PM > To: 'Mody, Mihir'; swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > Mhihir, > > thanks for the response. To add to this, Part 3 of MPEG-4 > (MPEG-4 Audio) > indeed does not support G.723. The MP4 file format does not support it > natively, but it is possible to register private object types > and put them > in an MP4 file. > > The MP4 file format and the MPEG-4 standard are sometimes seen as > equivalent, especially in the press, but MP4 is really a part > of the larger > MPEG-4 standard. > > To be precise, MPEG-4 Part 12 gives the base text for the ISO > Media File > format, and part 14 gives the MPEG-4 specific extensions. > Over time, the MP4 > file format has found uses outside of MPEG-4 (3GPP, JPEG2000) > and that's why > MPEG has separated out the generics from the MPEG-4 > specifics, even though > these two parts are technically still both a part of MPEG-4. > > An AVC-specific extension is also being drafted (part 15). > > Best, > Rob > > > -----Original Message----- > > From: mp4-tech-bounces@lists.mpegif.org > > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Mody, Mihir > > Sent: Thursday, 24 June 2023 18:57 > > To: swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > > > > Hi Philip, > > > > The MP4 format doesn't support G.723. You should look at > > other format like QTtime (.mov) > > > > Regards, > > Mihir > > > > -----Original Message----- > > From: mp4-tech-bounces@lists.mpegif.org > > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of > > swhong@cs.hku.hk > > Sent: Thursday, June 24, 2023 9:22 PM > > To: mp4-tech@lists.mpegif.org > > Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > > > > Dear all, > > > > I'm trying to add G.723 compressed audio stream to the MP4 > > formatted file. I > > can't find the part-3 of the Standard talks about this kind > > of audio codec. > > Would anybody here advise me the audio object code for G.723, > > and also I would > > like to know what kind of standard player under Windows XP > > can be used to > > playback MP4 file with G.723 audio MP4 file. > > > > Thanks in advance. > > > > -- Philip > > > > > > ------------------------------------------------- > > This mail sent through IMP: http://horde.org/imp/ > > _______________________________________________ > > NOTE: Please use clear subject lines for your posts. Include > > [audio, [video], [systems], [general] or another apppropriate > > identifier to indicate the type of question you have. > > > > Note: Conduct on the mailing list is subject to the Antitrust > > guidelines found at > > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti > trust.php > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate > identifier to indicate > the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines > found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From tejasavora rediffmail.com Sat Jun 26 09:42:19 2004 From: tejasavora rediffmail.com (Tejas A Vora) Date: Sat Jun 26 07:15:04 2004 Subject: [Mp4-tech] I and P frame Comparison Message-ID: <20040626084213.18554.qmail@webmail36.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040626/ecffee40/attachment.html -------------- next part -------------- Hi, Comparing the video quality objectively is not very easy. So I'm thinking about comparing two mpeg4 videos by comparing the counts of received I-frames and P-frames. But I think we should treat I and P frames differently. Then my question is how different we should treat them? Is there any formula or scheme that can convert the received I and P frame count into the video quality measure? Thanks, Tejas From raaja47 yahoo.com Sat Jun 26 11:42:57 2004 From: raaja47 yahoo.com (=?iso-8859-1?q?Gulistan=20Raja?=) Date: Sat Jun 26 07:21:46 2004 Subject: [Mp4-tech] [video] MPEG Message-ID: <20040626094257.64129.qmail@web11405.mail.yahoo.com> Dear All Encoding a sequence using Micrsoft Reference MPEG4 encoder for certain frames, we get PSNR values for each frame. I am confused about the PSNR value of last frame that whether it is the last frame PSNR or average PSNR of all encoded frames. Could anyone, please clear my confusion Thanks Raja ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html From sunx pollux.usc.edu Sun Jun 27 01:31:14 2004 From: sunx pollux.usc.edu (sunx) Date: Sun Jun 27 05:06:22 2004 Subject: [Mp4-tech] [video] MPEG In-Reply-To: <20040626094257.64129.qmail@web11405.mail.yahoo.com> Message-ID: It should be the PSNR of the last frame. However, you can compute the PSNR for each Y, U, V components, or for the average of them. You can also compute the arithmetic or geometric mean as the PSNR value. Best regards, Xiaoming On Sat, 26 Jun 2004, [iso-8859-1] Gulistan Raja wrote: > Dear All > > Encoding a sequence using Micrsoft Reference MPEG4 > encoder for certain frames, we get PSNR values for > each frame. I am confused about the PSNR value of last > frame that whether it is the last frame PSNR or > average PSNR of all encoded frames. Could anyone, > please clear my confusion > > Thanks > Raja > > ________________________________________________________________________ > Yahoo! Messenger - Communicate instantly..."Ping" > your friends today! Download Messenger Now > http://uk.messenger.yahoo.com/download/index.html > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > From grigory letsVision.com Mon Jun 28 12:38:23 2004 From: grigory letsVision.com (Grigory A.) Date: Mon Jun 28 04:15:37 2004 Subject: [Mp4-tech] [Video: mpeg-4.2] profiles level questions. Message-ID: <161242872.20040628113823@letsVision.com> Hi! Could some one help me? Me question is following: Annex N of mpeg-4.2 describes "Visual profiles@levels" so does it means SP L1 can have up to 4 VO? and if answer is "yes" - how these 4 VO are combined on final scene? or if I am wrong - what does is the meaning of "4" in column "Max ob-jects" in this annex? -- Best wishes, Grigory A. e-mail: grigory@letsvision.com From rob.koenen mpegif.org Mon Jun 28 11:58:09 2004 From: rob.koenen mpegif.org (Rob Koenen (MPEGIF)) Date: Mon Jun 28 05:48:19 2004 Subject: [Mp4-tech] [Video: mpeg-4.2] profiles level questions. In-Reply-To: <161242872.20040628113823@letsVision.com> Message-ID: <000c01c45cee$093e0d90$0300a8c0@corp.intertrust.com> Your assumption is correct. Composition does not happen at the vidoe layer but at the systems layer. In practice, this possibility is not used a lot (or at all). Level 0, which was added later, does away with this capability of splitting the available macroblock area into multiple indpendent objects. Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Grigory A. > Sent: Monday, 28 June 2023 04:38 > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] [Video: mpeg-4.2] profiles level questions. > > > Hi! > > Could some one help me? > Me question is following: > > Annex N of mpeg-4.2 describes "Visual profiles@levels" > so > does it means SP L1 can have up to 4 VO? > and if answer is "yes" - how these 4 VO are combined on final scene? > or if I am wrong - what does is the meaning of "4" in column > "Max ob-jects" in this annex? > > > -- > Best wishes, > Grigory A. > e-mail: grigory@letsvision.com > > > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php From mihir ti.com Mon Jun 28 17:42:49 2004 From: mihir ti.com (Mody, Mihir) Date: Mon Jun 28 10:28:17 2004 Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A740947A3@dbde2k01.ent.ti.com> Hi Rob, I agree with this. The fallout of this kind of extension will be loss of interoperability with other players. In many cases, there is need to play content produced by one device (e.g. embedded product) to another players (e.g. PC). So even if we get flexibility of extending format, it comes at limitation of closed system implementation. Regards, Mihir -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Rob Koenen (MPEGIF) Sent: Friday, June 25, 2023 6:21 PM To: 'Dipankar Mitra'; mp4-tech@lists.mpegif.org Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format You can put a lot of stuff in an MPEG-4 stream or an MP4 file that is not MPEG-4 itself. Whether the resulting stream/file is still MPEG-4 compliant is a matter of definition ... you can make it comply to the Systems (MP4) syntax, but it won't be co,pliant to the codec specs. Whether that's a problem is up to you. Other players would be able to tell that they don't understand the object type. Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Dipankar Mitra > Sent: Friday, 25 June 2023 10:36 > To: mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > Hi Rob, > Regarding ... "but it is possible to register private object > types and put them in an MP4 file." > > Does this mean that I can add any audio codec as a > private object type and still call it an MP4 file (.mp4 > extension)? How will other players (which do not support the > audio codec) understand that the audio content is to be ignored? > Regards, > Dipankar > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Rob > Koenen (MPEGIF) > Sent: Friday, June 25, 2023 1:18 PM > To: 'Mody, Mihir'; swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > Mhihir, > > thanks for the response. To add to this, Part 3 of MPEG-4 > (MPEG-4 Audio) > indeed does not support G.723. The MP4 file format does not support it > natively, but it is possible to register private object types > and put them > in an MP4 file. > > The MP4 file format and the MPEG-4 standard are sometimes seen as > equivalent, especially in the press, but MP4 is really a part > of the larger > MPEG-4 standard. > > To be precise, MPEG-4 Part 12 gives the base text for the ISO > Media File > format, and part 14 gives the MPEG-4 specific extensions. > Over time, the MP4 > file format has found uses outside of MPEG-4 (3GPP, JPEG2000) > and that's why > MPEG has separated out the generics from the MPEG-4 > specifics, even though > these two parts are technically still both a part of MPEG-4. > > An AVC-specific extension is also being drafted (part 15). > > Best, > Rob > > > -----Original Message----- > > From: mp4-tech-bounces@lists.mpegif.org > > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Mody, Mihir > > Sent: Thursday, 24 June 2023 18:57 > > To: swhong@cs.hku.hk; mp4-tech@lists.mpegif.org > > Subject: RE: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > > > > Hi Philip, > > > > The MP4 format doesn't support G.723. You should look at > > other format like QTtime (.mov) > > > > Regards, > > Mihir > > > > -----Original Message----- > > From: mp4-tech-bounces@lists.mpegif.org > > [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of > > swhong@cs.hku.hk > > Sent: Thursday, June 24, 2023 9:22 PM > > To: mp4-tech@lists.mpegif.org > > Subject: [Mp4-tech] Audio Object Code for G.723 of MP4 format > > > > > > Dear all, > > > > I'm trying to add G.723 compressed audio stream to the MP4 > > formatted file. I > > can't find the part-3 of the Standard talks about this kind > > of audio codec. > > Would anybody here advise me the audio object code for G.723, > > and also I would > > like to know what kind of standard player under Windows XP > > can be used to > > playback MP4 file with G.723 audio MP4 file. > > > > Thanks in advance. > > > > -- Philip > > > > > > ------------------------------------------------- > > This mail sent through IMP: http://horde.org/imp/ > > _______________________________________________ > > NOTE: Please use clear subject lines for your posts. Include > > [audio, [video], [systems], [general] or another apppropriate > > identifier to indicate the type of question you have. > > > > Note: Conduct on the mailing list is subject to the Antitrust > > guidelines found at > > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti > trust.php > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate > identifier to indicate > the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines > found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From behin1 yahoo.com Mon Jun 28 11:49:58 2004 From: behin1 yahoo.com (Mohsen) Date: Mon Jun 28 15:03:49 2004 Subject: [Mp4-tech] I.P. B frames Message-ID: <20040628174958.57984.qmail@web41412.mail.yahoo.com> Hi everybody, How can i distinguish the frames in an encoded MPEg-$ bit-stream? Please answer to mohsena@sce.carleton.ca __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail From vodprof yahoo.com Tue Jun 29 00:25:13 2004 From: vodprof yahoo.com (Veni Soni) Date: Tue Jun 29 04:18:32 2004 Subject: [Mp4-tech] MPEG-4 Video VBV.. Buffer Analysis Message-ID: <20040629062513.84038.qmail@web53304.mail.yahoo.com> Folks, 1. In case of VBV (annex-D), nothing is specified about the input rate of the VBV buffer (R). Assume R to be constant we can model the VBV. In real scenario (like ISMA, MPEG-4 AV over RTP), who determine this R. To be specific, does the transmit time of RTP determine R (assuming constant delay between receiver and sender). 2. For maintaining the bitrate, mpeg4 provide the stuffing codewords which can be inserted before startcodes. Does this account for the VBV buffer 3. DTS of a frame = prev frame CTS (provided there are no B frames). why it is so where as in case of mpeg2 DTS of a frame = CTS of the frame (provided there are no B frames) Thanks in advance, veni enJOY life __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail From RajeshMN soc-soft.com Tue Jun 29 15:09:55 2004 From: RajeshMN soc-soft.com (RajeshMN@soc-soft.com) Date: Tue Jun 29 05:06:28 2004 Subject: [Mp4-tech] I and P frame Comparison Message-ID: Hi, Objective estimation of video quality can be done as per the ITS Method and we found that it is suitable. And i am not sure about your I and P frame Comparison Method. Can u please elaborate. with best wishes, Rajesh MN -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Tejas A Vora Sent: Saturday, June 26, 2023 2:12 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] I and P frame Comparison Hi, Comparing the video quality objectively is not very easy. So I'm thinking about comparing two mpeg4 videos by comparing the counts of received I-frames and P-frames. But I think we should treat I and P frames differently. Then my question is how different we should treat them? Is there any formula or scheme that can convert the received I and P frame count into the video quality measure? Thanks, Tejas The information contained in this e-mail message and in any annexure is confidential to the recipient and may contain privileged information. If you are not the intended recipient, please notify the sender and delete the message along with any annexure. You should not disclose, copy or otherwise use the information contained in the message or any annexure. Any views expressed in this e-mail are those of the individual sender except where the sender specifically states them to be the views of SoCrates Software India Pvt Ltd., Bangalore. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040629/0f96bf80/attachment.html From bernie_lang hotmail.com Tue Jun 29 18:09:15 2004 From: bernie_lang hotmail.com (Bernhard Lang) Date: Tue Jun 29 17:24:11 2004 Subject: [Mp4-tech] problems with mp4 video files Message-ID: hi, i want to convert a *.mp4 video file to *.media, *.nhnt and *.info with "mp4tool" by ENST. i'm trying to get a *.mp4-file by converting a divx-avi with divx 5.0.2. but i always get error messages telling me, that the input *.avi file isn't convertable, altough it is a divx 5.0.2 encoded file. can anyone help me with this problem? thanks in advance, bernie _________________________________________________________________ Behalten Sie Ihre Hotmails, den Messenger und die Suchfunktionen stets im Auge! http://toolbar.msn.at?DI=43&XAPID=2170 From k_kotegar yahoo.co.in Tue Jun 29 16:32:39 2004 From: k_kotegar yahoo.co.in (=?iso-8859-1?q?karunakar=20A.K.?=) Date: Tue Jun 29 17:29:10 2004 Subject: [Mp4-tech] best motion estimation Message-ID: <20040629143239.76319.qmail@web8202.mail.in.yahoo.com> Please tell me which is the best block based motion estimation algorithm? I consider the fast dimond search, is it true or not? with regards kk Yahoo! India Matrimony: Find your partner online. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040629/60f3ccb3/attachment.html From jean-claude.dufourd enst.fr Wed Jun 30 00:48:36 2004 From: jean-claude.dufourd enst.fr (Jean-Claude Dufourd) Date: Wed Jun 30 05:30:23 2004 Subject: [Mp4-tech] problems with mp4 video files In-Reply-To: References: Message-ID: <40E1E3B4.2050302@enst.fr> Bernhard Lang wrote: > i want to convert a *.mp4 video file to *.media, *.nhnt and *.info > with "mp4tool" by ENST. > i'm trying to get a *.mp4-file by converting a divx-avi with divx > 5.0.2. but i always get error messages telling me, that the input > *.avi file isn't convertable, altough it is a divx 5.0.2 encoded file. mp4tool looks for the 4cc codes "divx", "dv50" and "xvid". If your file has something else, you may change the 4cc code in any hex editor and try again. Sorry for suggesting such a hack, but we cannot distribute new versions... Best regards JC From alexandros.tourapis thomson.net Tue Jun 29 19:03:54 2004 From: alexandros.tourapis thomson.net (Tourapis Alexandros) Date: Wed Jun 30 05:32:54 2004 Subject: [Mp4-tech] best motion estimation Message-ID: <8FC831532CEE564AB88AC1D999C29DEBC534C7@prinsmail01.am.thmulti.com> It depends on how/what you quantify/qualify as "best". There are many items you need to consider, implementation complexity (hardware vs software), memory requirements, quality peformance, speed up increase etc. Other constrains within your system could also affect your decision of the ME scheme, while depending on the codec you use, i.e. MPEG4-AVC, other features such as Mode decision are critical. There is a book by Peter Kuhn named "Algorithms, Complexity Analysis and Vlsi Architectures for Mpeg-4 Motion Estimation" which provides some overview, but it might be considered a bit outdated while you can definitely find much better references online. For certain applications (especially in hardware) Hierarchical algorithms can be for certain applications (esp in hardware) the better option, while for others you can go for predictive algorithms (although you can claim that maybe I am biased on this prediction). DS in general is not considered a very good scheme. You can see the following : M.Gallant, G.Cote, and F.Kossentini, "A Computation Constrained Block-based Motion Estimation Algorithm for Low Bit Rate Video Coding", IEEE Transactions on Image Processing, 8(12), Dec'99 A.M.Tourapis, O.C.Au, and M.L.Liou, "ighly efficient predictive zonal algorithms for fast block-matching motion estimation,"IEEE Transactions on Circuits and Systems for Video Technology, Vol.12, Iss.10, Pages: 934- 47, Oct'02 A.M.Tourapis, "Enhanced Predictive Zonal Search for Single and Multiple Frame Motion Estimation," in proceedings of Visual Communications and Image Processing 2002 (VCIP-2002), pp. 1069-79, San Jose, CA, Jan'02 H.Y. Cheong, A.M. Tourapis, "Fast Motion Estimation within the H.264 codec," in proceedings of 2003 IEEE International Conference on MultiMedia & Expo (ICME-2003), Baltimore, MD, July 6-9, 2003 There are also several algorithms in the literature with tiny variations (e.g. using different patterns for example) but more or less the concept is the same. Select a set of predictors, examine their reliability, select the best one(s), and if necessary refine using certain patterns within a small area around them. Best regards Alexis ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of karunakar A.K. Sent: Tuesday, June 29, 2023 10:33 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] best motion estimation Please tell me which is the best block based motion estimation algorithm? I consider the fast dimond search, is it true or not? with regards kk Yahoo! India Matrimony : Find your partner online . From vodprof yahoo.com Wed Jun 30 02:14:00 2004 From: vodprof yahoo.com (Veni Soni) Date: Wed Jun 30 05:35:28 2004 Subject: [Mp4-tech] I and P frame Comparison In-Reply-To: Message-ID: <20040630081400.9053.qmail@web53310.mail.yahoo.com> Hi, Cant we get down to the basics like SNR (sample to noise ratio to get the quality of video irrespective of I/B/P veni --- RajeshMN@soc-soft.com wrote: > > Hi, > > Objective estimation of video quality can be done > as per the ITS Method > and we found that it is suitable. > > And i am not sure about your I and P frame > Comparison Method. Can u > please elaborate. > > with best wishes, > Rajesh MN > > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf > Of Tejas A Vora > Sent: Saturday, June 26, 2023 2:12 PM > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] I and P frame Comparison > > > > Hi, > > Comparing the video quality objectively is not very > easy. So I'm > thinking about comparing two mpeg4 videos by > comparing the counts of > received I-frames and P-frames. > > But I think we should treat I and P frames > differently. > Then my question is how different we should treat > them? Is there any > formula or scheme that can convert the received I > and P frame count into > the video quality measure? > > Thanks, > Tejas > > > > > > > > > The information contained in this e-mail message and > in any annexure is > confidential to the recipient and may contain > privileged information. If you are not > the intended recipient, please notify the sender and > delete the message along with > any annexure. You should not disclose, copy or > otherwise use the information contained > in the message or any annexure. Any views expressed > in this e-mail are those of the > individual sender except where the sender > specifically states them to be the views of > SoCrates Software India Pvt Ltd., Bangalore.> _______________________________________________ > NOTE: Please use clear subject lines for your posts. > Include [audio, [video], [systems], [general] or > another apppropriate identifier to indicate the type > of question you have. > > Note: Conduct on the mailing list is subject to the > Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail From andrewk vbrick.com Wed Jun 30 09:48:12 2004 From: andrewk vbrick.com (Andrew Krupiczka) Date: Wed Jun 30 18:44:56 2004 Subject: [Mp4-tech] best motion estimation Message-ID: Hi kk, >From our somewhat limited experiences I'd also suggest to look at frequency based "translation motion measurements" approach, namely phase correlation method, originally developed by Thomas from BBC R&D in late 80s. As the major advantage here I regard the fact that complexity of doesn't depend on the motion searching range making it very desirable for higher video resolutions. Also because of normalization stage involved this algorithm is completely insensitive to illumination changes i.e. still correctly measures occuring motions what might become a serious issue for algorithms operating in spatial domain. Regards, Andrew > -----Original Message----- > From: Tourapis Alexandros [mailto:alexandros.tourapis@thomson.net] > Sent: Tuesday, June 29, 2023 6:04 PM > To: karunakar A.K.; mp4-tech@lists.mpegif.org > Subject: RE: [Mp4-tech] best motion estimation > > > It depends on how/what you quantify/qualify as "best". There are many > items you need to consider, implementation complexity (hardware vs > software), memory requirements, quality peformance, speed up increase > etc. Other constrains within your system could also affect > your decision > of the ME scheme, while depending on the codec you use, i.e. > MPEG4-AVC, > other features such as Mode decision are critical. There is a book by > Peter Kuhn named "Algorithms, Complexity Analysis and Vlsi > Architectures > for Mpeg-4 Motion Estimation" which provides some overview, > but it might > be considered a bit outdated while you can definitely find much better > references online. For certain applications (especially in hardware) > Hierarchical algorithms can be for certain applications (esp in > hardware) the better option, while for others you can go for > predictive > algorithms (although you can claim that maybe I am biased on this > prediction). DS in general is not considered a very good scheme. > > You can see the following : > > M.Gallant, G.Cote, and F.Kossentini, "A Computation Constrained > Block-based Motion Estimation Algorithm for Low Bit Rate > Video Coding", > IEEE Transactions on Image Processing, 8(12), Dec'99 > A.M.Tourapis, O.C.Au, and M.L.Liou, "ighly efficient predictive zonal > algorithms for fast block-matching motion estimation,"IEEE > Transactions > on Circuits and Systems for Video Technology, Vol.12, Iss.10, Pages: > 934- 47, Oct'02 > A.M.Tourapis, "Enhanced Predictive Zonal Search for Single > and Multiple > Frame Motion Estimation," in proceedings of Visual Communications and > Image Processing 2002 (VCIP-2002), pp. 1069-79, San Jose, CA, Jan'02 > H.Y. Cheong, A.M. Tourapis, "Fast Motion Estimation within the H.264 > codec," in proceedings of 2003 IEEE International Conference on > MultiMedia & Expo (ICME-2003), Baltimore, MD, July 6-9, 2003 > > There are also several algorithms in the literature with tiny > variations > (e.g. using different patterns for example) but more or less > the concept > is the same. Select a set of predictors, examine their reliability, > select the best one(s), and if necessary refine using certain patterns > within a small area around them. > > Best regards > > Alexis > > > > > > ________________________________ > > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of karunakar A.K. > Sent: Tuesday, June 29, 2023 10:33 AM > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] best motion estimation > > > Please tell me which is the best block based motion estimation > algorithm? I consider the fast dimond search, is it true or not? > with regards > kk > > Yahoo! India Matrimony > : Find your partner online . _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php From smatwankar pace.stpp.soft.net Wed Jun 30 22:52:35 2004 From: smatwankar pace.stpp.soft.net (Swapna Matwankar) Date: Wed Jun 30 18:46:38 2004 Subject: [Mp4-tech] Problem in 3gp stream References: <20040630081400.9053.qmail@web53310.mail.yahoo.com> Message-ID: <001701c45ebe$741336f0$cd64a8c0@psil> Hi All, I am getting problem in playing a 3gp file in quicktime player. Is there any way that I can find the exact problem in the stream? The stream gets played properly by the phillips player but in quicktime player, only audio gets played but for video only green frames are seen. thanks and regards, swapna From behin1 yahoo.com Wed Jun 30 13:39:11 2004 From: behin1 yahoo.com (Mohsen) Date: Wed Jun 30 18:47:58 2004 Subject: [Mp4-tech] Video Evaluation Message-ID: <20040630193911.8563.qmail@web41414.mail.yahoo.com> Hi I wonder when there is jitter in receiving video frames, how we should evaluate video quality? Even in calcualting PSNR, there is a confusion once you want to do frame by frame subtraction. regards Mohsen __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail