[Mp4-tech] Re: Mp4-tech Digest, Vol 24, Issue 24

Tue Jul 26 07:52:06 EDT 2005

  mpeg-4 AAC+sbr...docs,source everything u will get from 3gpp.org
On Sun, 24 Jul 2023 mp4-tech-request lists.mpegif.org wrote :
>Send Mp4-tech mailing list submissions to
> 	mp4-tech lists.mpegif.org
>
>To subscribe or unsubscribe via the World Wide Web, visit
> 	http://lists.mpegif.org/mailman/listinfo/mp4-tech
>or, via email, send a message with subject or body 'help' to
> 	mp4-tech-request lists.mpegif.org
>
>You can reach the person managing the list at
> 	mp4-tech-owner lists.mpegif.org
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of Mp4-tech digest..."
>
>
>Today's Topics:
>
>    1. Re: How to decode video of H264 (Frank Xu)
>    2. Re: AAC+SBR (Andreas Schneider)
>    3. MPEG-4 Sprite Generation softweare (Mike Cho)
>    4. RE: H.246 on DVB (Gary Sullivan)
>    5. MPEG-4 packetizing using UDP (bala kumar)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Fri, 22 Jul 2023 11:35:13 -0400
> From: "Frank Xu" <fghxu hotmail.com>
>Subject: Re: [Mp4-tech] How to decode video of H264
>To: "viraj ambetkar" <princeofpersia79 gmail.com>
>Cc: mp4-tech lists.mpegif.org
>Message-ID: <BAY106-DAV11A637F6A445F0E75DC0BBABC90 phx.gbl>
>Content-Type: text/plain;	charset="ISO-8859-1"
>
>Hi Viraj,
>
>Where did you find the foreman_4cif30.yuv?  I can find the qcif and cif
>video seqence online but not the 4cif.
>
>As for the paths.  you can open the config files and manually change the
>video paths inside.  please use the Unix absolute paths.
>
>I think I did encode one layer of video, but not other layers.  (by modifing
>files under jsvm/JSVM0-config-samples/Munich-Test-Points/cfg ,  using the
>template like *.cfg.linux  in the directory:
>jsvm/JSVM0-config-samples/Palma-CE1-Conditions/cfg )
>
>Since I don't have knowledge of how to decode video, I have no way to see
>what did I encoded.  Do you know how to decode a file?
>
>
>Cheers
>
>
>Frank
>
>----- Original Message -----
> From: "viraj ambetkar" <princeofpersia79 gmail.com>
>To: "Frank Xu" <fghxu hotmail.com>
>Sent: Thursday, July 21, 2023 2:52 PM
>Subject: Re: [Mp4-tech] YUV viewer for Linux
>
>
>Hi Frank,
>
>I have managed to obtain 2 layers (basically 2 different files) from
>the original CIF Foreman sequence using DownConvertStatic in
>~/jsvm/bin.
>
>layer0 - QCIF Foreman
>layer1 - CIF Foreman
>layer2 - 4CIF Foreman
>
>I just used the following commands at the prompt for obtaining layers
>2 and 0 respectively:
>
>/DownConvertStatic -tmm foreman_cif30.yuv 352 288 foreman_4cif30.yuv
>704 576 [0[0[ ]]]
>
>/DownConvertStatic -tmm foreman_cif30.yuv 352 288 foreman_qcif30.yuv
>176 144 [0[0[ ]]]
>
>My next step is to encode the above layers in a single bitstream using
>H264AVCEncoderLibTestStatic.  For that, you will have to modify
>encoder.cfg, layerX.cfg (where X corresponds to 0, 1, or 2) in
>~/jsvm/JSVM/H264Extension/data.  Most of the stuff is self-explanatory
>there. You can encode the layers as:
>
>/H264AVCEncoderLibTestStatic -pf encoder.cfg
>
>But I am facing problems with the paths of the layerX.cfg files, there
>is some hard coding in the source which is preventing the encoder from
>reading the .cfg files.  So, I am unable to encode any further.  Did
>you have any further luck with the software?  I hope to get the
>encoder working soon.  Keep me posted!
>
>Viraj
>
>
>On 7/19/05, Frank Xu <fghxu hotmail.com> wrote:
> > Hi Viraj,
> >
> > Have you tried to encode/decode a video?   I tried whole day and seems I
> > can't encode a video.  Do you know how to encode a video in H264 with SNR
> > scalability?  I suppose this version of reference software is able to do
> > that, right?  I will try it harder.
> >
> > Regards
> >
> > Frank
> >
> >
> > ----- Original Message -----
> > From: "viraj ambetkar" <princeofpersia79 gmail.com>
> > To: <mp4-tech lists.mpegif.org>
> > Sent: Monday, July 18, 2023 5:50 PM
> > Subject: [Mp4-tech] YUV viewer for Linux
> >
> >
> > > Hi all,
> > >
> > > Does anyone know of a YUV viewer for Linux?  I have seen plenty of YUV
> > > viewers for Windows, but am I am unable to find one for Linux.
> > >
> > >
> > > Thanks,
> > >
> > > Viraj
> > >
> > > _______________________________________________
> > > 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
> > >
> >
>
>
>--
>Viraj Ambetkar
>Research Assistant
>Mobile Communication and Information Systems Lab
>Wright State University, Dayton, Ohio, USA
>
>------------------------------
>
>Message: 2
>Date: Fri, 22 Jul 2023 16:47:06 +0100
> From: Andreas Schneider <snd codingtechnologies.com>
>Subject: Re: [Mp4-tech] AAC+SBR
>To: <sakthi.narayanan soc-soft.com>
>Cc: mp4-tech-bounces lists.mpegif.org, mp4-tech lists.mpegif.org
>Message-ID:
> 	<OF929077F5.99E5D007-ONC1257046.0054C81E-41257046.0056B582 codingtechnologies.com>
>
>Content-Type: text/plain; charset="US-ASCII"
>
>Hello,
>
>mp4-tech-bounces lists.mpegif.org wrote on 20.07.2023 15:44:47:
>
> > Hi all,
> >
> >  Whether  MPEG4 AAC+SBR  is a standard like MPEG4  AAC.
> > What is happening inside the SBR part.Can anybody tell me where
> > Can I get standard document of AAC+SBR decoder.
>
>The SBR standard is currently available at the ISO-store as amendment 1 to
>the 2001 version (2nd ed.) of the MPEG-4 audio standard (
>http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=38148&ICS1=35&ICS2=40&ICS3=).
>
>Best regards,
>
>Andreas
>
> >
> > With Regards,
> > Sakthi
> >
> > 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 GmbH
>Deutschherrnstr. 15-19
>90429 Nuernberg, Germany
>phone: +49 (0) 911 92891 -26
>fax: +49 (0) 911 92891 -99
>
>mailto:snd CodingTechnologies.com
>
>
>------------------------------
>
>Message: 3
>Date: Fri, 22 Jul 2023 10:20:20 -0700 (PDT)
> From: Mike Cho <mkwcho yahoo.com>
>Subject: [Mp4-tech] MPEG-4 Sprite Generation softweare
>To: mp4-tech lists.mpegif.org
>Message-ID: <20050722172020.79198.qmail web50201.mail.yahoo.com>
>Content-Type: text/plain; charset=iso-8859-1
>
>Dear All,
>
>According to MPEG-4 VM 18 document App D and MPEG-4
>Part 7 Optimized software, there are two sprite
>generation methods proposed. Please advise where I can
>find the software of them.
>
>Thanks.
>
>Regards,
>
>Mike
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
>------------------------------
>
>Message: 4
>Date: Sat, 23 Jul 2023 05:29:29 -0700
> From: "Gary Sullivan" <garysull windows.microsoft.com>
>Subject: RE: [Mp4-tech] H.246 on DVB
>To: "Stephen Henry" <Stephen.Henry elixent.com>,
> 	<mp4-tech lists.mpegif.org>
>Message-ID:
> 	<91D7F2CEE3425A4A9D11311D09FCE2460FA18716 WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com>
>
>Content-Type: text/plain; charset="us-ascii"
>
>This would not be a "safe" assumption in general.  We discussed whether
>to impose such a constraint on encoders, and decided not to.
>
>The concept that we considered to be a viable alternative was to operate
>the parsing process of a decoder in a serial fashion, and take advantage
>of parallelism in the rest of the decoding process but not in the
>parsing.  Designing a decoder in this fashion prevents us from needing
>to impose constraints on encoders to force them to be "nice" to
>parallel-oriented decoder designs.
>
>Best Regards,
>
>Gary Sullivan
>
>
>________________________________
>
> 	From: mp4-tech-bounces lists.mpegif.org
>[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Stephen Henry
> 	Sent: Friday, July 22, 2023 6:28 AM
> 	To: mp4-tech lists.mpegif.org
> 	Subject: [Mp4-tech] H.246 on DVB
>
>
>
> 	Hi all,
>
>
>
> 	I have a couple of questions, could someone please help me with
>them?
>
>
>
> 	I'm interested in using H.264 for HDTV and higher resolutions.
>To me, it seems like the natural way to enhance a hardware accelerator
>for H.264 is through parallelizing the system using multiple slices. For
>example, four independent encoders can encode 4 quarters of the one
>frame in a quarter of the time of just one. What I wanted to know is
>whether it would be safe to assume whether this can be done at the
>decoder as well? I was thinking that it is unlikely that for broadcast
>H.264, high resolution frame would need to be partitioned into slices to
>be encoded in real time and therefore it would be safe to assume that
>such parallelism is available at the decoder as well.
>
>
>
> 	Does anyone know whether the DVB standards impose a number upon
>the minimum number of slices that a decoder can assume are present?
>
>
>
> 	Thanks,
>
>
>
> 	SCH
>
>-------------- next part --------------
>An HTML attachment was scrubbed...
>URL: /pipermail/mp4-tech/attachments/20050723/76a6dcb5/attachment-0001.html
>
>------------------------------
>
>Message: 5
>Date: Sun, 24 Jul 2023 04:19:10 -0700 (PDT)
> From: bala kumar <balakumarcg yahoo.com>
>Subject: [Mp4-tech] MPEG-4 packetizing using UDP
>To: mp4-tech lists.mpegif.org
>Message-ID: <20050724111911.53392.qmail web32012.mail.mud.yahoo.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Hi everyone,
>
>My harward card gives me  ISO/IEC 14496-2 SOP level3 streams.
>I want to render it using DirectX8.1(DirectShow) and DivX.
>
>What will be the packet format that i have to use to sent that streams over a UDP packet?
>what kind of Filters i have to use to render this RawStream?
>
>Thanks in advance
>balakumarcg
>
>
>---------------------------------
>  Start your day with Yahoo! - make it your home page
>-------------- next part --------------
>An HTML attachment was scrubbed...
>URL: /pipermail/mp4-tech/attachments/20050724/965ab5cb/attachment-0001.html
>
>------------------------------
>
>_______________________________________________
>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
>
>End of Mp4-tech Digest, Vol 24, Issue 24
>****************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20050726/77375645/attachment-0001.html