From rajiv_bjp yahoo.co.in Thu Feb 1 13:10:21 2007 From: rajiv_bjp yahoo.co.in (Rajiv Bajpai) Date: Thu Feb 1 15:52:16 2007 Subject: [Mp4-tech] [H264] delta_pic_order_cnt[0] parameter in POC type 1 Message-ID: <873319.2400.qm@web8807.mail.in.yahoo.com> Dear Experts I have got one doubt regarding delta_pic_order_cnt[0] syntax element for POC mode 1 in slice header. Is this parameter always zero for IDR pic when poc type == 1;? This I could not find anywhere in the standard( or may be this can be implied) In the JM reference decoder, this parameter is forced to set to be zero irrespective of what is decoded from the stream. file: header.c, line no: 632 {" img->delta_pic_order_cnt[0]=0; //ignore first delta "} If there is no constraint on delta_pic_order_cnt[0] to be zero for IDR pic then above stated line of code creates problem. For example, if delta_pic_order_cnt[0] is non zero for a picture and the picture has multiple slices then the above code causes detection of new picture for every different slices of the same picture. Since saving of the current slice fields are done in ?exit_slice()? function which causes delta_pic_order_cnt[0] to be zero for old slice. So for the next slice of the same picture, old_slice.delta_pic_order_cnt[0] != img->delta_pic_order_cnt[0] condition becomes true for POC mode 1 which falsely assign the next slice of the same picture to new picture; Any feedback and comment is highly appreciated Regards, Rajiv --------------------------------- Here?s a new way to find what you're looking for - Yahoo! Answers -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070201/1f3a3be0/attachment.html From nitinmpai gmail.com Fri Feb 2 17:36:03 2007 From: nitinmpai gmail.com (Nitin PAI) Date: Fri Feb 2 14:16:09 2007 Subject: [Mp4-tech] IPCM Macroblock Message-ID: Hi Experts, I have a question on IPCM macroblocks. Does the standard define that the size of a macroblock cannot exceed 384 bytes? If so, the JM decoder should flag an error, but I see that JM decoder doesnt flag an error. Is it legal for a encoded MB to exceed 384 bytes? Also, I would like to know more about DC Saturation in terms of how often does it take place,is there any AC saturation limits too? Thanks, --Nit -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070202/4eda437d/attachment.html From mayank_2001 hotmail.com Fri Feb 2 16:58:41 2007 From: mayank_2001 hotmail.com (Mayank Agarwal) Date: Sun Feb 4 21:10:07 2007 Subject: [Mp4-tech] Cropping in JPEG Message-ID: Hi all, My purpose is to crop the JPEG image of size 176*144. sequential interleaved image that is one MCU consists of data of all the components.MCU size is 16*16 =99 MCUs in one image.How should i select the number of MCUs so that the resulting decode output YUV image is of size 100*100. Regards, Mayank _________________________________________________________________ Get Married in 2007. Join Shaadi.com http://www.shaadi.com/ptnr.php?ptnr=mhottag From pankaj_bajpai_iet operamail.com Tue Feb 6 06:23:25 2007 From: pankaj_bajpai_iet operamail.com (pankaj bajpai) Date: Tue Feb 6 09:04:06 2007 Subject: [Mp4-tech] Cropping in JPEG Message-ID: <20070206052325.DC25943888@ws5-1.us4.outblaze.com> Dear Mayank, The dimensions must be multiple of 8 and also the number of vertical and horz blocks must be multiple of Hi and Vi. Number of blocks in an MCU depends on subsampling factor. Thus for the given dimension, it is fixed. I mean to say that you cannot select MCU for a given dimension. It is fixed. Please correct me if i am wrong. With regards > From: Mayank Agarwal > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] Cropping in JPEG > Date: Fri, 02 Feb 2024 16:58:41 +0530 > > > Hi all, > My purpose is to crop the JPEG image of size 176*144. > sequential interleaved image that is one MCU consists of data of > all the components.MCU size is 16*16 =99 MCUs in one image.How > should i select the number of MCUs so that the resulting decode > output YUV image is of size 100*100. > > Regards, > Mayank > > _________________________________________________________________ > Get Married in 2007. Join Shaadi.com > http://www.shaadi.com/ptnr.php?ptnr=mhottag > > _______________________________________________ > 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. > > 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 > Pankaj Kumar Bajpai Mulitimedia Engineer India -- _______________________________________________ Search for products and services at: http://search.mail.com Powered by Outblaze From komraid googlemail.com Tue Feb 6 15:56:28 2007 From: komraid googlemail.com (S N Mirza) Date: Tue Feb 6 20:52:09 2007 Subject: [Mp4-tech] Help with MomuSys Software Message-ID: <212b0b500702060756o2ae56d22ue38d462bd91f0302@mail.gmail.com> Hi, I am using MoMusys Mpeg4 software. Can someone please guide me how can I disable periodic INTRA frame refresh option from its config files. If I set it to 0, it gives an exception. Is there any way of doing it without changing the code? I want to implement selective or random INTRA refresh mbs (like AIR) in each frame instead of INTRA frame refresh option. Regards Mirza -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070206/e8d7cfe7/attachment.html From imran5577 yahoo.com Tue Feb 6 22:07:05 2007 From: imran5577 yahoo.com (Muhammad imran latif) Date: Wed Feb 7 09:04:07 2007 Subject: [Mp4-tech] pps and SPS in H264 In-Reply-To: <200702061707.l16H7Q2s021114@lists1.magma.ca> Message-ID: <7429.8206.qm@web56203.mail.re3.yahoo.com> Dear Peoples , I want to check the PPS and SPS option in refrence software(encoder). One thing i have done is the flags named GenerateMultiplePPS and ResendPPS = 1; i have put them one and read their header that told me that this option is ON. But i dont know the video type or video input or video size, that when and where i have to change the picture size to see the changed result. Thanks in advance. regards, imran ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com From dmitriy graphics.cs.msu.ru Wed Feb 7 19:39:00 2007 From: dmitriy graphics.cs.msu.ru (Dmitriy Vatolin) Date: Thu Feb 8 14:04:09 2007 Subject: [Mp4-tech] MSU MPEG-4 AVC/ H.264 codecs comparison PRO Message-ID: <1117546961.20070207193900@graphics.cs.msu.ru> Dear video codec professionals! Pro version of MSU MPEG-4 AVC/ H.264 codecs comparison prepared now and available for companies! Full version of report contain 157 pages, 185 charts (52 pages, 47 figures in short version). It includes following additional topics: * SSIM RD curves individually for each sequence from all sequences * All codecs presets (parameters) * Differences between PSNR and SSIM results * Absolute encoding speed charts * Relative Bitrate/Relative Speed graphs individually for each sequence from test set * Relative bitrate for the same quality for all pairs of codecs * Bitrate handling graphs * Per-frame quality and dispersion graphs * Additional results for codecs (Apple, Sorenson, DivX) You contribution will help us: * To help us to continue this comparison without any participation fees (this is important for x264 and xViD AVC next year) * To avoid comparison sponsorship by codecs' developers * To keep comparison detailed and useful. Comparison page: http://www.compression.ru/video/codec_comparison/mpeg-4_avc_h264_2006_en.html -- Best regards, Dr. Vatolin mailto:dmitriy@graphics.cs.msu.ru From Nilesh.Dixit lntinfotech.com Thu Feb 8 14:14:34 2007 From: Nilesh.Dixit lntinfotech.com (Nilesh Dixit) Date: Thu Feb 8 14:04:14 2007 Subject: [Mp4-tech] MPEG-4 Xvid output Message-ID: Hi I am currently working on MPEG-4 Decoder using XVID codec code. While running the application using -i C:\\xvidcore-1.1.2\\build\\win32\\output -d where output is the mpeg bitstream file I am getting the output in PGM format with headers as P5 #xvid 480 312 255 and some bit streams................................... But I wanted the output in YUV Format ,so may i know exaclty which type of encoding it does to produce pgm format and how to obtain yuv format (4:2:0 ) from it??? Also is the any specific tool using which i can get mpeg4 stream as an output from an mp4 input Thanks ______________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070208/e462aa40/attachment.html From mayank_2001 hotmail.com Thu Feb 8 20:05:17 2007 From: mayank_2001 hotmail.com (Mayank Agarwal) Date: Thu Feb 8 20:28:06 2007 Subject: [Mp4-tech] Cropping in JPEG In-Reply-To: Message-ID: Hi all, I am trying to implement Cropping in JPEG.Suppose there is the decode r output YUV image of size 288*224 and i want to crop it to a size of 112*112 then what could be the possible approaches: One approach is to modify the final output buffer at the end of each Y/U/V component to the required size but i am not getting the correct Output.If anyone has worked on this previously,he can be of some help. Regards, Mayank >From: Nilesh Dixit >To: mp4-tech@lists.mpegif.org >Subject: [Mp4-tech] MPEG-4 Xvid output >Date: Thu, 8 Feb 2024 14:14:34 +0530 > >Hi >I am currently working on MPEG-4 Decoder using XVID codec code. >While running the application using -i >C:\\xvidcore-1.1.2\\build\\win32\\output -d where output is the mpeg >bitstream file I am getting the output in PGM format with headers as >P5 >#xvid >480 312 >255 >and some bit streams................................... > >But I wanted the output in YUV Format ,so may i know exaclty which type >of encoding it does to produce pgm format and how to obtain yuv format >(4:2:0 ) from it??? > >Also is the any specific tool using which i can get mpeg4 stream as an >output from an mp4 input > >Thanks > > >______________________________________________________________________ >_______________________________________________ >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 _________________________________________________________________ Latest updates from the world of sports http://content.msn.co.in/Sports/Default From ds.iitian gmail.com Fri Feb 9 17:40:34 2007 From: ds.iitian gmail.com (srinivas devarakonda) Date: Fri Feb 9 14:40:07 2007 Subject: [Mp4-tech] scan mode for transform coef Message-ID: <4c7769720702090410r1af3a7d3hf03b68504f8f0a50@mail.gmail.com> dear all kindly tell me, is their any provision to in h.264 to change the default zig-zig scanning pattern and alternate scanning mode . i am confused with very much thanks in adv -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070209/97f1a9a7/attachment.html From changfeng.niu gmail.com Sat Feb 10 15:17:17 2007 From: changfeng.niu gmail.com (changfeng niu) Date: Sat Feb 10 15:34:09 2007 Subject: [Mp4-tech] How to get the frame rate by the timestamp Message-ID: <9d688aea0702092317r6a2fce98h46e9b613becd8042@mail.gmail.com> Hi everyone: I want to gain the frame rate using the timestamp information in RTP header. However, it is some matter when the encoder may be skip some frame and maybe use a varialbe frame rate (means the interval between the frames is not constant). Would anyone like to tell me how to get out of the problem? thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070210/f51dbcb0/attachment.html From Ye-Kui.Wang nokia.com Sun Feb 11 11:38:19 2007 From: Ye-Kui.Wang nokia.com (Ye-Kui.Wang@nokia.com) Date: Sun Feb 11 20:22:07 2007 Subject: [Mp4-tech] How to get the frame rate by the timestamp In-Reply-To: <9d688aea0702092317r6a2fce98h46e9b613becd8042@mail.gmail.com> References: <9d688aea0702092317r6a2fce98h46e9b613becd8042@mail.gmail.com> Message-ID: <1C1F3D15859526459B4DD0A7A9B2268B031CC4B6@trebe101.NOE.Nokia.com> Hi Changfeng, Why would you think that (i.e. variable frame rate) is a problem? BR, YK ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ext changfeng niu Sent: Saturday, February 10, 2024 9:17 AM To: mp4-tech Subject: [Mp4-tech] How to get the frame rate by the timestamp Hi everyone: I want to gain the frame rate using the timestamp information in RTP header. However, it is some matter when the encoder may be skip some frame and maybe use a varialbe frame rate (means the interval between the frames is not constant). Would anyone like to tell me how to get out of the problem? thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070211/64de755f/attachment.html From changfeng.niu gmail.com Sun Feb 11 23:14:13 2007 From: changfeng.niu gmail.com (changfeng niu) Date: Sun Feb 11 20:22:11 2007 Subject: [Mp4-tech] How to get the frame rate by the timestamp In-Reply-To: <1C1F3D15859526459B4DD0A7A9B2268B031CC4B6@trebe101.NOE.Nokia.com> References: <9d688aea0702092317r6a2fce98h46e9b613becd8042@mail.gmail.com> <1C1F3D15859526459B4DD0A7A9B2268B031CC4B6@trebe101.NOE.Nokia.com> Message-ID: <9d688aea0702110714n38f4a0a7j6d916888667489af@mail.gmail.com> Hi Ye-Kui I can get the frame rate by 90kHz divided by interval between two consecutive frames. Right? However,for variable frame rate, I cannot get the right frame rate by the above way. Maybe you could give a better idea to solve the problem. Thanks for your response. Regards ChangFeng 2007/2/11, Ye-Kui.Wang@nokia.com : > > Hi Changfeng, > > Why would you think that (i.e. variable frame rate) is a problem? > > BR, YK > > ------------------------------ > *From:* mp4-tech-bounces@lists.mpegif.org [mailto: > mp4-tech-bounces@lists.mpegif.org] *On Behalf Of *ext changfeng niu > *Sent:* Saturday, February 10, 2024 9:17 AM > *To:* mp4-tech > *Subject:* [Mp4-tech] How to get the frame rate by the timestamp > > > Hi everyone: > I want to gain the frame rate using the timestamp information in RTP > header. However, it is some matter when the encoder may be skip some frame > and maybe use a varialbe frame rate (means the interval between the frames > is not constant). Would anyone like to tell me how to get out of the > problem? > thanks > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070211/24d1f89a/attachment.html From sagar sarayusoftech.com Tue Feb 13 11:22:34 2007 From: sagar sarayusoftech.com (sagar) Date: Tue Feb 13 10:52:09 2007 Subject: [Mp4-tech] Reg. MPEG- 4 SP Encoder on BF561 In-Reply-To: Message-ID: Hi Xperts, Would like to know, weather video resolution of D1@30fps can be achieved on Blackfin 561( Dual core) Processor? At present, we are running at D1@10fps. Any strategy, guidence, suggestions on.. how it can be achieved are welcome.. Splitting the MPEG 4 SP Encoder,( processing being distrbuted) between the two core's will help? Thanks in advance for any help provided... Warm Regards, Sagar -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070213/c0ae08a8/attachment.html From bs.guru gmail.com Tue Feb 13 16:17:03 2007 From: bs.guru gmail.com (Gururaj Bhat) Date: Tue Feb 13 13:16:05 2007 Subject: [Mp4-tech] [video]Padding in non standard videos Message-ID: <6ff0db9f0702130247g1e44985fg69e5b5d50261fb45@mail.gmail.com> Hi all, I have a case in which the encoded mpeg4 video is of size 176*140. Since the macroblock size is 16*16,140/16 is not an integer. So,does encoder need to take care to pad the video frame while encoding? or is it the duty of the decoder? regards, Gururaj Bhat -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070213/fa8b441e/attachment.html From Nilesh.Dixit lntinfotech.com Tue Feb 13 17:53:33 2007 From: Nilesh.Dixit lntinfotech.com (Nilesh Dixit) Date: Tue Feb 13 13:16:11 2007 Subject: [Mp4-tech] IDCT Explanation Message-ID: Hi, I am currently going thru the XVID MPEG-4 Decoder code. Can I anywhere get the detailed explaination of the idct code explaining the coding steps of IDCT Thanks in advance Nilesh Dixit Software Engineer ______________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070213/522927f9/attachment.html From dv2 naver.com Wed Feb 14 02:21:32 2007 From: dv2 naver.com (=?US-ASCII?B?Q2FydGVy?=) Date: Tue Feb 13 18:34:06 2007 Subject: =?US-ASCII?B?W01wNC10ZWNoXSB0aGUgbGF0ZXN0IEZhc3QgSURDVA==?= Message-ID: Hi~! i'm looking for the latest Fast IDCT paper or theory. so, could somebody recommand a paper or theory. once, i have been looking for paper or theory in IEEE site. But, i can't found it. please help me.. NAVER Korea's No.1 search portal -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070214/384400e9/attachment.html From garysull windows.microsoft.com Tue Feb 13 12:12:14 2007 From: garysull windows.microsoft.com (Gary Sullivan) Date: Tue Feb 13 20:22:07 2007 Subject: [Mp4-tech] the latest Fast IDCT In-Reply-To: References: Message-ID: <03CB47D9C3F8074498E4653F814D6E8F03D84AA0@WIN-MSG-20.wingroup.windeploy.ntdev.microsoft.com> Carter et al, If you have access to MPEG contributions, I would highly recommend looking into the recent MPEG work on ISO/IEC 23002-2. Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Carter Sent: Tuesday, February 13, 2024 9:22 AM To: Nilesh Dixit; mp4-tech@lists.mpegif.org Subject: [Mp4-tech] the latest Fast IDCT Hi~! i'm looking for the latest Fast IDCT paper or theory. so, could somebody recommand a paper or theory. once, i have been looking for paper or theory in IEEE site. But, i can't found it. please help me.. NAVER Korea's No.1 search portal -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070213/e72b8240/attachment.html From rajkrishnanp gmail.com Wed Feb 14 10:11:09 2007 From: rajkrishnanp gmail.com (Rajkrishnan Parameswaran) Date: Wed Feb 14 06:10:07 2007 Subject: [Mp4-tech] Audio - AAC - MP4 Message-ID: <99945fe20702132041r2f2d625dp5597157f200bcd34@mail.gmail.com> Hi I have tried to build the ISO reference AAC decoder. However there are two functions MP4TrackReaderGetNextAccessUnitWithPad() and MP4AddMediaSamplesPad() which are missing. Since I have to decode MP4 files I cannot do without these. I assume a more recent update might have taken care of this. Could anyone let me know where I could get this? Thanks Raj -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070214/bfd23b2c/attachment.html From pankaj_bajpai_iet operamail.com Wed Feb 14 06:11:36 2007 From: pankaj_bajpai_iet operamail.com (pankaj bajpai) Date: Wed Feb 14 06:10:11 2007 Subject: [Mp4-tech] [video]Padding in non standard videos Message-ID: <20070214051136.369C7CA0A4@ws5-11.us4.outblaze.com> Dear Gururaj , Yes encoder need to take care of padding. This is because the DCT is performed on the 8x8 blocks. SO for border MBs, if you dont do padding, there will not be sufficient elements to perform DCT. With regards > From: Gururaj Bhat > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] [video]Padding in non standard videos > Date: Tue, 13 Feb 2024 16:17:03 +0530 > > > Hi all, > > I have a case in which the encoded mpeg4 video is of size 176*140. > Since the macroblock size is 16*16,140/16 is not an integer. > So,does encoder need to take care to pad the video frame while encoding? > or is it the duty of the decoder? > > regards, > Gururaj Bhat > Pankaj Kumar Bajpai Mulitimedia Engineer India -- _______________________________________________ Search for products and services at: http://search.mail.com Powered by Outblaze From bs.guru gmail.com Wed Feb 14 11:21:39 2007 From: bs.guru gmail.com (Gururaj Bhat) Date: Wed Feb 14 06:10:15 2007 Subject: [Mp4-tech] [video]Padding in non standard videos In-Reply-To: <20070214051136.369C7CA0A4@ws5-11.us4.outblaze.com> References: <20070214051136.369C7CA0A4@ws5-11.us4.outblaze.com> Message-ID: <6ff0db9f0702132151y1b2d3489x3b463870f5e0a685@mail.gmail.com> Hi Pankaj, Thanks for your answer. I have one more doubt.Suppose it is padded,then what is the frame size that has to be incorporated in the header of the encoded file?is it the original size or the padded size? Suppose the padded size is included,then is there any way for the decoder to know that the video is padded,and how much? Thanks in advance. On 2/14/07, pankaj bajpai wrote: > > Dear Gururaj , > > Yes encoder need to take care of padding. This is because the DCT is > performed on the 8x8 blocks. SO for border MBs, if you dont do padding, > there will not be sufficient elements to perform DCT. > > With regards > > > > From: Gururaj Bhat > > To: mp4-tech@lists.mpegif.org > > Subject: [Mp4-tech] [video]Padding in non standard videos > > Date: Tue, 13 Feb 2024 16:17:03 +0530 > > > > > > Hi all, > > > > I have a case in which the encoded mpeg4 video is of size 176*140. > > Since the macroblock size is 16*16,140/16 is not an integer. > > So,does encoder need to take care to pad the video frame while encoding? > > or is it the duty of the decoder? > > > > regards, > > Gururaj Bhat > > > > > > Pankaj Kumar Bajpai > Mulitimedia Engineer > India > > > -- > _______________________________________________ > Search for products and services at: > http://search.mail.com > > Powered by Outblaze > -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070214/2b07d686/attachment.html From lance.lmwang gmail.com Wed Feb 14 14:50:47 2007 From: lance.lmwang gmail.com (Limin Wang) Date: Wed Feb 14 17:22:06 2007 Subject: [Mp4-tech] Audio - AAC - MP4 In-Reply-To: <99945fe20702132041r2f2d625dp5597157f200bcd34@mail.gmail.com> References: <99945fe20702132041r2f2d625dp5597157f200bcd34@mail.gmail.com> Message-ID: <20070214065047.GA6445@laptop.yuvad.cn> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 * Rajkrishnan Parameswaran [2024-02-14 10:11:09 +0530]: > > Hi > > > > I have tried to build the ISO reference AAC decoder. However there are > two functions MP4TrackReaderGetNextAccessUnitWithPad() and > MP4AddMediaSamplesPad() which are missing. Since I have to decode MP4 > files I cannot do without these. I assume a more recent update might > have taken care of this. Could anyone let me know where I could get > this? I think You need get and build mp4 file format ISO reference code(libisomediafile) and link it. Thanks, Limin -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iQEVAwUBRdKxR0ztbf7dKiuoAQLUSwf/dT1Jyt/iAg0l8p7cCA83XxdEv1tLaAFi /aD4Wn8eJA602QnLCNavJ5ucLwCuV6DNRLZ4l4+ohIhPsvRTxRPgavRsf6dI0cSW wmiT4cqk/VOan82JrWC8sV15lGalt8bMib8bcd6+KhussqvhgCMHm/QsfjEmi6/o U4A764YupM35JTurNEeObSSaEG5tfMgHfGz3OJPLSuBDzAIV05uRme7jtcUD8FJa YumglR8SyzlBwBFFh43IiFEsPHheDv0CwUJKMAWLDz7yohWllHfVuhV2jW4XqHGT lQVasJOIPzmePb0LH1jh+djpkGMfcK9YwpbspQx948LMyJzsvi5www== =vgoj -----END PGP SIGNATURE----- From melkotevinay yahoo.co.uk Wed Feb 14 17:49:33 2007 From: melkotevinay yahoo.co.uk (melkote vinay) Date: Wed Feb 14 19:28:05 2007 Subject: [Mp4-tech] Audio - AAC - MP4 Message-ID: <20070214174933.7095.qmail@web25111.mail.ukl.yahoo.com> Hi Rajkrishnan, Have you tried this link? http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/ This is where I downloaded the decoder from and it works. I use the Visual C++ build. Vinay --------------------------------- Inbox full of unwanted email? Get leading protection and 1GB storage with All New Yahoo! Mail. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070214/2e68a385/attachment.html From pankaj_bajpai_iet operamail.com Thu Feb 15 05:27:01 2007 From: pankaj_bajpai_iet operamail.com (pankaj bajpai) Date: Thu Feb 15 16:10:08 2007 Subject: [Mp4-tech] [video]Padding in non standard videos Message-ID: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> Dear Gururaj, In the sequence header, it is the original size ie non-padded size that need to be put. with regards > ----- Original Message ----- > From: "Gururaj Bhat" > To: "pankaj bajpai" > Subject: Re: [Mp4-tech] [video]Padding in non standard videos > Date: Wed, 14 Feb 2024 11:21:39 +0530 > > > Hi Pankaj, > > Thanks for your answer. > I have one more doubt.Suppose it is padded,then what is the frame size that > has to be incorporated in the header of the encoded file?is it the original > size or the padded size? > > Suppose the padded size is included,then is there any way for the decoder to > know that the video is padded,and how much? > > Thanks in advance. > > > > > On 2/14/07, pankaj bajpai wrote: > > > > Dear Gururaj , > > > > Yes encoder need to take care of padding. This is because the DCT is > > performed on the 8x8 blocks. SO for border MBs, if you dont do padding, > > there will not be sufficient elements to perform DCT. > > > > With regards > > > > > > > From: Gururaj Bhat > > > To: mp4-tech@lists.mpegif.org > > > Subject: [Mp4-tech] [video]Padding in non standard videos > > > Date: Tue, 13 Feb 2024 16:17:03 +0530 > > > > > > > > > Hi all, > > > > > > I have a case in which the encoded mpeg4 video is of size 176*140. > > > Since the macroblock size is 16*16,140/16 is not an integer. > > > So,does encoder need to take care to pad the video frame while encoding? > > > or is it the duty of the decoder? > > > > > > regards, > > > Gururaj Bhat > > > > > > > > > > > Pankaj Kumar Bajpai > > Mulitimedia Engineer > > India > > > > > > -- > > _______________________________________________ > > Search for products and services at: > > http://search.mail.com > > > > Powered by Outblaze > > > Pankaj Kumar Bajpai Mulitimedia Engineer India -- _______________________________________________ Search for products and services at: http://search.mail.com Powered by Outblaze From gehariprasath gmail.com Thu Feb 15 12:53:54 2007 From: gehariprasath gmail.com (hari prasath) Date: Thu Feb 15 16:10:13 2007 Subject: [Mp4-tech] MV extraction Message-ID: <5730fc040702142323i5c99cbb8ja0f086b9de434240@mail.gmail.com> Dear Experts, Is ther any parameter in the config file of reference software(any version) that will allow us to extarct the motion vectors generated by the encoder? If so,help me out -- Best Regards G.E.Hari Prasath -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070215/d051c3e9/attachment.html From akhalife uci.edu Thu Feb 15 09:33:06 2007 From: akhalife uci.edu (akhalife@uci.edu) Date: Thu Feb 15 22:16:05 2007 Subject: [Mp4-tech] MPEG-4 Audio NAtural tools and BSAC encoder/decoder Message-ID: <58790.128.200.9.235.1171560786.squirrel@webmail.uci.edu> Dear experts I need a MPEG-4 Audio BSAC encoder/decoder. I getthe free publically available version of the MPEG-4 Audio tools. http://isotc.iso.org/livelink/livelink/fetch/2000/2489/Ittf_Home/PubliclyAvailableStandards.htm if you look at :ISO/IEC 14496-5:2001/Amd.6:2005 I have followed theinstructions, but it does not compile . so can any body guide me where I can get a working version that compile well ? Regards Ala From hichem.mk gmail.com Fri Feb 16 17:01:46 2007 From: hichem.mk gmail.com (h M) Date: Fri Feb 16 23:04:06 2007 Subject: [Mp4-tech] [h264] Negative qp Message-ID: Dear experts, In 8.5.2 section, I have found the following note: NOTE 1 ? QP quantisation parameter values QPY and QSY are always in the range of ?QpBdOffsetY to 51, inclusive. QP quantisation parameter values QPCand QS C are always in the range of ?QpBdOffsetC to 51, inclusive. So, could we really have a negative QP for either luma or chroma? And what does it means ? Best regards Hichem -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070216/79ecc830/attachment.html From garysull windows.microsoft.com Fri Feb 16 15:45:32 2007 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Feb 16 23:52:09 2007 Subject: [Mp4-tech] [h264] Negative qp In-Reply-To: References: Message-ID: <03CB47D9C3F8074498E4653F814D6E8F03E4BDA6@WIN-MSG-20.wingroup.windeploy.ntdev.microsoft.com> Hichem et al, Yes, negative QP is possible in some profiles. But do not confuse QP with the quantizer reconstruction step size. QP is just a control parameter that controls what the step size is, it is not the step size itself. There is nothing too magical about negative or positive values. The relationship between QP and step size is approximately proportional to two raised to the power of QP/6. Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of h M Sent: Friday, February 16, 2024 8:02 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [h264] Negative qp Dear experts, In 8.5.2 section, I have found the following note: NOTE 1 ? QP quantisation parameter values QPY and QSY are always in the range of ?QpBdOffset Y to 51, inclusive. QP quantisation parameter values QPC and QSC are always in the range of ?QpBdOffsetC to 51, inclusive. So, could we really have a negative QP for either luma or chroma? And what does it means ? Best regards Hichem -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070216/5e1c0439/attachment.html From bs.guru gmail.com Tue Feb 20 18:58:10 2007 From: bs.guru gmail.com (Gururaj Bhat) Date: Tue Feb 20 15:34:19 2007 Subject: [Mp4-tech] [video]Padding in non standard videos In-Reply-To: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> References: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> Message-ID: <6ff0db9f0702200528s6aabe1efl23c6a35d7a1aa008@mail.gmail.com> Skipped content of type multipart/alternative-------------- next part -------------- A non-text attachment was scrubbed... Name: pigs.3gp Type: video/3gpp Size: 2330968 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20070220/9d9eb238/pigs-0001.bin From herbert.thoma iis.fraunhofer.de Wed Feb 21 12:49:42 2007 From: herbert.thoma iis.fraunhofer.de (Herbert Thoma) Date: Wed Feb 21 14:46:07 2007 Subject: [Mp4-tech] [video]Padding in non standard videos In-Reply-To: <6ff0db9f0702200528s6aabe1efl23c6a35d7a1aa008@mail.gmail.com> References: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> <6ff0db9f0702200528s6aabe1efl23c6a35d7a1aa008@mail.gmail.com> Message-ID: <45DC31D6.4000703@iis.fraunhofer.de> Hi, I believe that the file is correct. The encoder can put what it likes into the not displayed rows (140 - 143). The decoder has to use these decoded pixel values in case of UMV. See subclause 7.6.4 of ISO/IEC 14496-2:2004: "Note that for rectangular VOP, a reference VOP is defined by video_object_layer_width and video_object_layer_height, extended to a multiple of 16." We had a discussion about this padding issue on this reflector at the end of November 2006. Kind regards, Herbert. Gururaj Bhat schrieb: > Hi all, > > I have attached a file of size 176 x 140 (pigs.3gp) which when played on my > decoder,is showing pink patches at the bottom. > I feel that this is a non standard file in which the encoder has not padded > the remaining 4 columns with the last pel data ( ie with column 140) but > with some random data which in this case happens to be pink. > I guess that when the decoder has UMV ( unlimited motion vector's) which > point outside the frame size 176 x 140 it picks up this random data and > that's the reason for the pink patches to be seen. > Some other decoders also play this file similarly but decoders like > quicktime , real player etc play the file without any pink patches. > Could you please check how this file plays with your decoders ? > I would be interested in knowing how the MPEG VM ( verification models) > play > out this file . > > You can refer to subclause 7.6.1 of the MPEG-4 standard which explains > about > the padding process for non-standard sizes. > > Thanks > > > > On 2/15/07, pankaj bajpai wrote: >> >> Dear Gururaj, >> >> In the sequence header, it is the original size ie non-padded size >> that need to be put. >> >> with regards >> >> > ----- Original Message ----- >> > From: "Gururaj Bhat" >> > To: "pankaj bajpai" >> > Subject: Re: [Mp4-tech] [video]Padding in non standard videos >> > Date: Wed, 14 Feb 2024 11:21:39 +0530 >> > >> > >> > Hi Pankaj, >> > >> > Thanks for your answer. >> > I have one more doubt.Suppose it is padded,then what is the frame size >> that >> > has to be incorporated in the header of the encoded file?is it the >> original >> > size or the padded size? >> > >> > Suppose the padded size is included,then is there any way for the >> decoder to >> > know that the video is padded,and how much? >> > >> > Thanks in advance. >> > >> > >> > >> > >> > On 2/14/07, pankaj bajpai wrote: >> > > >> > > Dear Gururaj , >> > > >> > > Yes encoder need to take care of padding. This is because the DCT is >> > > performed on the 8x8 blocks. SO for border MBs, if you dont do >> padding, >> > > there will not be sufficient elements to perform DCT. >> > > >> > > With regards >> > > >> > > >> > > > From: Gururaj Bhat >> > > > To: mp4-tech@lists.mpegif.org >> > > > Subject: [Mp4-tech] [video]Padding in non standard videos >> > > > Date: Tue, 13 Feb 2024 16:17:03 +0530 >> > > > >> > > > >> > > > Hi all, >> > > > >> > > > I have a case in which the encoded mpeg4 video is of size 176*140. >> > > > Since the macroblock size is 16*16,140/16 is not an integer. >> > > > So,does encoder need to take care to pad the video frame while >> encoding? >> > > > or is it the duty of the decoder? >> > > > >> > > > regards, >> > > > Gururaj Bhat >> > > > >> > > >> > > >> > > >> > > Pankaj Kumar Bajpai >> > > Mulitimedia Engineer >> > > India >> > > >> > > >> > > -- >> > > _______________________________________________ >> > > Search for products and services at: >> > > http://search.mail.com >> > > >> > > Powered by Outblaze >> > > >> >> > >> >> >> >> Pankaj Kumar Bajpai >> Mulitimedia Engineer >> India >> >> >> -- >> _______________________________________________ >> Search for products and services at: >> http://search.mail.com >> >> Powered by Outblaze >> > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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 Head of Video Group 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 bs.guru gmail.com Wed Feb 21 17:34:02 2007 From: bs.guru gmail.com (Gururaj Bhat) Date: Wed Feb 21 14:46:16 2007 Subject: [Mp4-tech] [video]Padding in non standard videos In-Reply-To: <45DC31D6.4000703@iis.fraunhofer.de> References: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> <6ff0db9f0702200528s6aabe1efl23c6a35d7a1aa008@mail.gmail.com> <45DC31D6.4000703@iis.fraunhofer.de> Message-ID: <6ff0db9f0702210404j26210c5eg5ecf445af63a986d@mail.gmail.com> Thanks Herbert for your answer. did that file play on your decoder or any verification model without any pink spots? Please let me know. Regards, Gururaj Bhat On 2/21/07, Herbert Thoma wrote: > > Hi, > > I believe that the file is correct. > > The encoder can put what it likes into the not displayed > rows (140 - 143). The decoder has to use these decoded > pixel values in case of UMV. > > See subclause 7.6.4 of ISO/IEC 14496-2:2004: > "Note that for rectangular VOP, a reference VOP is defined by > video_object_layer_width and video_object_layer_height, extended > to a multiple of 16." > > We had a discussion about this padding issue on this reflector > at the end of November 2006. > > Kind regards, > Herbert. > > Gururaj Bhat schrieb: > > Hi all, > > > > I have attached a file of size 176 x 140 (pigs.3gp) which when played on > my > > decoder,is showing pink patches at the bottom. > > I feel that this is a non standard file in which the encoder has not > padded > > the remaining 4 columns with the last pel data ( ie with column 140) but > > with some random data which in this case happens to be pink. > > I guess that when the decoder has UMV ( unlimited motion vector's) which > > point outside the frame size 176 x 140 it picks up this random data and > > that's the reason for the pink patches to be seen. > > Some other decoders also play this file similarly but decoders like > > quicktime , real player etc play the file without any pink patches. > > Could you please check how this file plays with your decoders ? > > I would be interested in knowing how the MPEG VM ( verification models) > > play > > out this file . > > > > You can refer to subclause 7.6.1 of the MPEG-4 standard which explains > > about > > the padding process for non-standard sizes. > > > > Thanks > > > > > > > > On 2/15/07, pankaj bajpai wrote: > >> > >> Dear Gururaj, > >> > >> In the sequence header, it is the original size ie non-padded size > >> that need to be put. > >> > >> with regards > >> > >> > ----- Original Message ----- > >> > From: "Gururaj Bhat" > >> > To: "pankaj bajpai" > >> > Subject: Re: [Mp4-tech] [video]Padding in non standard videos > >> > Date: Wed, 14 Feb 2024 11:21:39 +0530 > >> > > >> > > >> > Hi Pankaj, > >> > > >> > Thanks for your answer. > >> > I have one more doubt.Suppose it is padded,then what is the frame > size > >> that > >> > has to be incorporated in the header of the encoded file?is it the > >> original > >> > size or the padded size? > >> > > >> > Suppose the padded size is included,then is there any way for the > >> decoder to > >> > know that the video is padded,and how much? > >> > > >> > Thanks in advance. > >> > > >> > > >> > > >> > > >> > On 2/14/07, pankaj bajpai wrote: > >> > > > >> > > Dear Gururaj , > >> > > > >> > > Yes encoder need to take care of padding. This is because the DCT > is > >> > > performed on the 8x8 blocks. SO for border MBs, if you dont do > >> padding, > >> > > there will not be sufficient elements to perform DCT. > >> > > > >> > > With regards > >> > > > >> > > > >> > > > From: Gururaj Bhat > >> > > > To: mp4-tech@lists.mpegif.org > >> > > > Subject: [Mp4-tech] [video]Padding in non standard videos > >> > > > Date: Tue, 13 Feb 2024 16:17:03 +0530 > >> > > > > >> > > > > >> > > > Hi all, > >> > > > > >> > > > I have a case in which the encoded mpeg4 video is of size > 176*140. > >> > > > Since the macroblock size is 16*16,140/16 is not an integer. > >> > > > So,does encoder need to take care to pad the video frame while > >> encoding? > >> > > > or is it the duty of the decoder? > >> > > > > >> > > > regards, > >> > > > Gururaj Bhat > >> > > > > >> > > > >> > > > >> > > > >> > > Pankaj Kumar Bajpai > >> > > Mulitimedia Engineer > >> > > India > >> > > > >> > > > >> > > -- > >> > > _______________________________________________ > >> > > Search for products and services at: > >> > > http://search.mail.com > >> > > > >> > > Powered by Outblaze > >> > > > >> > >> > > >> > >> > >> > >> Pankaj Kumar Bajpai > >> Mulitimedia Engineer > >> India > >> > >> > >> -- > >> _______________________________________________ > >> Search for products and services at: > >> http://search.mail.com > >> > >> Powered by Outblaze > >> > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > 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 > Head of Video Group > 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/ > -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070221/d4d149ce/attachment.html From herbert.thoma iis.fraunhofer.de Wed Feb 21 14:11:09 2007 From: herbert.thoma iis.fraunhofer.de (Herbert Thoma) Date: Wed Feb 21 14:46:26 2007 Subject: [Mp4-tech] [video]Padding in non standard videos In-Reply-To: <6ff0db9f0702210404j26210c5eg5ecf445af63a986d@mail.gmail.com> References: <20070215042701.D304B7ACFB@ws5-10.us4.outblaze.com> <6ff0db9f0702200528s6aabe1efl23c6a35d7a1aa008@mail.gmail.com> <45DC31D6.4000703@iis.fraunhofer.de> <6ff0db9f0702210404j26210c5eg5ecf445af63a986d@mail.gmail.com> Message-ID: <45DC44ED.9090605@iis.fraunhofer.de> Gururaj Bhat schrieb: > Thanks Herbert for your answer. > > did that file play on your decoder or any verification model without any > pink spots? > Please let me know. It did play without pink spots on my decoder. I did not test with the verification models. Herbert. > Regards, > Gururaj Bhat > > > On 2/21/07, Herbert Thoma wrote: >> >> Hi, >> >> I believe that the file is correct. >> >> The encoder can put what it likes into the not displayed >> rows (140 - 143). The decoder has to use these decoded >> pixel values in case of UMV. >> >> See subclause 7.6.4 of ISO/IEC 14496-2:2004: >> "Note that for rectangular VOP, a reference VOP is defined by >> video_object_layer_width and video_object_layer_height, extended >> to a multiple of 16." >> >> We had a discussion about this padding issue on this reflector >> at the end of November 2006. >> >> Kind regards, >> Herbert. >> >> Gururaj Bhat schrieb: >> > Hi all, >> > >> > I have attached a file of size 176 x 140 (pigs.3gp) which when >> played on >> my >> > decoder,is showing pink patches at the bottom. >> > I feel that this is a non standard file in which the encoder has not >> padded >> > the remaining 4 columns with the last pel data ( ie with column 140) >> but >> > with some random data which in this case happens to be pink. >> > I guess that when the decoder has UMV ( unlimited motion vector's) >> which >> > point outside the frame size 176 x 140 it picks up this random data and >> > that's the reason for the pink patches to be seen. >> > Some other decoders also play this file similarly but decoders like >> > quicktime , real player etc play the file without any pink patches. >> > Could you please check how this file plays with your decoders ? >> > I would be interested in knowing how the MPEG VM ( verification models) >> > play >> > out this file . >> > >> > You can refer to subclause 7.6.1 of the MPEG-4 standard which explains >> > about >> > the padding process for non-standard sizes. >> > >> > Thanks >> > >> > >> > >> > On 2/15/07, pankaj bajpai wrote: >> >> >> >> Dear Gururaj, >> >> >> >> In the sequence header, it is the original size ie non-padded size >> >> that need to be put. >> >> >> >> with regards >> >> >> >> > ----- Original Message ----- >> >> > From: "Gururaj Bhat" >> >> > To: "pankaj bajpai" >> >> > Subject: Re: [Mp4-tech] [video]Padding in non standard videos >> >> > Date: Wed, 14 Feb 2024 11:21:39 +0530 >> >> > >> >> > >> >> > Hi Pankaj, >> >> > >> >> > Thanks for your answer. >> >> > I have one more doubt.Suppose it is padded,then what is the frame >> size >> >> that >> >> > has to be incorporated in the header of the encoded file?is it the >> >> original >> >> > size or the padded size? >> >> > >> >> > Suppose the padded size is included,then is there any way for the >> >> decoder to >> >> > know that the video is padded,and how much? >> >> > >> >> > Thanks in advance. >> >> > >> >> > >> >> > >> >> > >> >> > On 2/14/07, pankaj bajpai wrote: >> >> > > >> >> > > Dear Gururaj , >> >> > > >> >> > > Yes encoder need to take care of padding. This is because the DCT >> is >> >> > > performed on the 8x8 blocks. SO for border MBs, if you dont do >> >> padding, >> >> > > there will not be sufficient elements to perform DCT. >> >> > > >> >> > > With regards >> >> > > >> >> > > >> >> > > > From: Gururaj Bhat >> >> > > > To: mp4-tech@lists.mpegif.org >> >> > > > Subject: [Mp4-tech] [video]Padding in non standard videos >> >> > > > Date: Tue, 13 Feb 2024 16:17:03 +0530 >> >> > > > >> >> > > > >> >> > > > Hi all, >> >> > > > >> >> > > > I have a case in which the encoded mpeg4 video is of size >> 176*140. >> >> > > > Since the macroblock size is 16*16,140/16 is not an integer. >> >> > > > So,does encoder need to take care to pad the video frame while >> >> encoding? >> >> > > > or is it the duty of the decoder? >> >> > > > >> >> > > > regards, >> >> > > > Gururaj Bhat >> >> > > > >> >> > > >> >> > > >> >> > > >> >> > > Pankaj Kumar Bajpai >> >> > > Mulitimedia Engineer >> >> > > India >> >> > > >> >> > > >> >> > > -- >> >> > > _______________________________________________ >> >> > > Search for products and services at: >> >> > > http://search.mail.com >> >> > > >> >> > > Powered by Outblaze >> >> > > >> >> >> >> > >> >> >> >> >> >> >> >> Pankaj Kumar Bajpai >> >> Mulitimedia Engineer >> >> India >> >> >> >> >> >> -- >> >> _______________________________________________ >> >> Search for products and services at: >> >> http://search.mail.com >> >> >> >> Powered by Outblaze >> >> >> > >> > >> > >> ------------------------------------------------------------------------ >> > >> > _______________________________________________ >> > 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 >> Head of Video Group >> 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/ >> > -- Herbert Thoma Head of Video Group 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 rajvbharadwaj yahoo.co.in Mon Feb 26 11:44:55 2007 From: rajvbharadwaj yahoo.co.in (rajesh bharadwaj) Date: Mon Feb 26 14:04:07 2007 Subject: [Mp4-tech] Mpeg4 Streaming using DSS (RFC 3016/3640) Message-ID: <553879.80838.qm@web8324.mail.in.yahoo.com> Hello there, I am streaming a MPEG4 file through a Darwin Streaming server and was noticing the SDP dump in Ethereal. I have posted the dump for your reference. /*SDP Dump*/ a=range:npt=0- 70.00000 m=video 0 RTP/AVP 96 b=AS:76 a=rtpmap:96 MP4V-ES/90000 a=control:trackID=3 a=cliprect:0,0,242,192 a=framesize:96 192-242 a=fmtp:96 profile-level-id=1;config=000001B0F3000001B50EE040C0CF0000010000000120008440FA283020F2A21F a=mpeg4-esid:201 m=audio 0 RTP/AVP 97 b=AS:20 a=? rtpmap:97 mpeg4-generic/8000/2 a=control:trackID=4 a=fmtp:97 profile-level-id=15;mode=AAC-hbr; sizelength=13; indexlength=3; indexdeltalength=3;config=1590 a=mpeg4-esid:101 ____________________________________________________________ As can be seen , the audio is being streamed using RFC 3640 spec and the Video using RFC 3016. I wanted to know How the VLC player or if DSS is doing this, can possibly do that ? Does this happen to all the MPEG4 files? Please reply. _________________ Rajesh V --------------------------------- What kind of emailer are you? Find out today - get a free analysis of your email personality. Take the quiz at the Yahoo! Mail Championship. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070226/8b02c684/attachment.html From akhalife uci.edu Mon Feb 26 17:12:11 2007 From: akhalife uci.edu (akhalife@uci.edu) Date: Tue Feb 27 07:40:04 2007 Subject: [Mp4-tech] BSAC BITSTREAM FRMAT Message-ID: <2392.128.200.9.235.1172538731.squirrel@webmail.uci.edu> Dear Folks I am using the MPEG 4 BSAC encoder to encode audio files, I need to be able to interpret the output bitstreams, like where is the bits of the header, where is the base layer boundary, where and what each it means... anyone can tell me where I can get these information? the current published standard is expensive to buy (around 300$). so is there older free version that contains these information? Thanks Ala From sowmya_an yahoo.com Tue Feb 27 12:46:35 2007 From: sowmya_an yahoo.com (Sowmya) Date: Tue Feb 27 21:34:07 2007 Subject: [Mp4-tech] RE: Channel coupling Message-ID: <20070227204635.27254.qmail@web35612.mail.mud.yahoo.com> Hi , I am working on MPEG-4 AAC-LC decoder implementation with publicly available ISO code as my reference.I had following queries regarding channel coupling How is intensity coupling different from channel coupling ? Can CCE (coupling channel element) be enabled for stereo channels ? Do we have to support CCE by default for software products claiming conformance to MPEG-4 Audio standards ? Hoping for answers in this regard , Thanks Sowmya --------------------------------- Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070227/66c69314/attachment.html From ralph.sperschneider iis.fraunhofer.de Wed Feb 28 09:58:08 2007 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Feb 28 09:04:27 2007 Subject: [Mp4-tech] Re: Channel coupling In-Reply-To: <20070227204635.27254.qmail@web35612.mail.mud.yahoo.com> References: <20070227204635.27254.qmail@web35612.mail.mud.yahoo.com> Message-ID: <45E54420.2090304@iis.fraunhofer.de> Sowmya wrote: > Hi , > > I am working on MPEG-4 AAC-LC decoder implementation with publicly > available ISO code as my reference.I had following queries regarding > channel coupling > How is intensity coupling different from channel coupling ? > Can CCE (coupling channel element) be enabled for stereo channels ? > Do we have to support CCE by default for software products claiming > conformance to MPEG-4 Audio standards ? > > Hoping for answers in this regard , > Thanks > Sowmya Dear Sowmya, I am rather confident that you can find the answers to your questions in either ISO/IEC13818-7 or ISO/IEC14496-3. In the case you have difficulties to find the answers in these documents or if you have doubts with regard to the specifications please do not hesitate to contact me again. 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 shivanim03 gmail.com Wed Feb 28 18:19:44 2007 From: shivanim03 gmail.com (shivani mittal) Date: Wed Feb 28 22:04:06 2007 Subject: [Mp4-tech] JSVM softmanual Message-ID: <837093070702280449v79175aeek99546c4a886791d4@mail.gmail.com> hi !! This is shivani. i m working on motion compensation area of H.264/AVC scalable extension. i hav downloaded the rescent JSVM source code from cvs server but dint recieve any manual to assist the code. and i m finding it bit tough to understand the code without the documentation. can u please help out with the manual. Version: JSVM 8.6 (CVS tag: JSVM_8_ 5 ) Last update: February 27, 2024 thanx, shivani -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20070228/4fcbdbe6/attachment.html