[Mp4-tech] Re: Mp4-tech Digest, Vol 29, Issue 6

Thu Dec 8 12:36:15 ESTEDT 2005

Hello, 
 I want to do rtp packetization on H264 video stream, following the RFC 3984. I find the H.264 test models from http://iphome.hhi.de/suehring has this option in its encoder configuration file. I want to make sure it follow the RFC 3984 standard or not. If not, is there any open source to do it we can download.
 Thanks for your help!
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Today's Topics:
   1. RE: Differences between MPEG4 and MPEG4S (mayank agarwal)
   2. Re: Stsd Entry for Mp4 file containing AVC (Dave Singer)
   3. switching containers - .mp4 to .mpg (Jack Holt)
----------------------------------------------------------------------
Message: 1
Date: Wed, 7 Dec 2023 03:02:35 -0800 (PST)
From: mayank agarwal 
Subject: RE: [Mp4-tech] Differences between MPEG4 and MPEG4S
To: "Saradhi DV." 
Cc: mp4-tech lists.mpegif.org
Message-ID: <20051207110235.26760.qmail web52809.mail.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Saradhi,
ISO-14496 document that specifies MPEG-4 has the
option in which
MPEG-4 simple profile is compatible with H.263
baseline profile
In the former case the VOP header is 0x00 0x00 0x01
0xb6 and in the later case the VOP header is 0x00 0x00
0x01 0x80/81/82/83 and
in this case the MPEG-4 simple profile is compatible
with H.263
baseline profile.
 You can look for MPEG-4 standard doc at
www.iso.org,H.263 standard document can be downloaded
at www.itu.int.
Regards,
Mayank
--- "Saradhi DV." 
wrote:
> Dear Gary,
> 
> What I mean was MPEG4 Short headers.
> 
> I came to know that MPEG-4 Short headers means H.263
> video stream
> encapsulated with MPEG-4 video stream headers.
> 
> But is there any
> specification/documentation/reference code available
> for this standard.
> 
> Regards,
> Saradhi
> 
> -----Original Message-----
> From: Gary Sullivan
> [mailto:garysull windows.microsoft.com] 
> Sent: Tuesday, December 06, 2023 11:52 PM
> To: Saradhi DV.; mp4-tech lists.mpegif.org
> Subject: RE: [Mp4-tech] Differences between MPEG4
> and MPEG4S
> 
> 
> Saradhi et al,
> 
> There is nothing formally called MPEG4s or MPEG4S. 
> You did not say
> where you found that acronym, so it may be difficult
> to help you.  From
> a quick web search, I noticed that some people seem
> to be referring to
> "an MPEG4" as a video file that has been encoded in
> MPEG4 format, and
> that some people seem to be pluralizing the term by
> adding an "s" on the
> end.   So that having "some MPEG4s" refers to having
> some MPEG4-encoded
> files (similar to the way some people refer to
> having some "MP3s" when
> they refer to having some encoded audio files that
> use the MPEG-1 Layer
> 3 syntax).
> 
> Alternatively, one of the well-defined subsets of
> the technology in the
> standard is called the "Simple profile".  Therefore,
> MPEG4S might
> hypothetically refer to the Simple profile of MPEG4.
> 
> Best Regards,
> 
> Gary Sullivan 
> 
> +> -----Original Message-----
> +> From: mp4-tech-bounces lists.mpegif.org 
> +> [mailto:mp4-tech-bounces lists.mpegif.org] On
> Behalf Of Saradhi DV.
> +> Sent: Monday, December 05, 2023 12:56 AM
> +> To: mp4-tech lists.mpegif.org
> +> Subject: [Mp4-tech] Differences between MPEG4 and
> MPEG4S
> +> 
> +> Dear experts,
> +> 
> +> I am sorry to ask the basic question to experts.
> +> 
> +> Can any of you tell the differences between MPEG4
> and MPEG4s Video?
> +> I trine in web for documentation of MPEH4s, but
> it went in vain.
> +> 
> +> If any of you have useful documentation about
> MPEH4s could you please
> +> forward that to me or send me the links.
> +> 
> +> Thanks in advance.
> +> 
> +> Regards,
> +> Saradhi
> +> 
> +> 
> +> _______________________________________________
> +> NOTE: Please use clear subject lines for your
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> +> Antitrust guidelines found at 
> +>
>
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> +> itrust.php
> +> 
> 
> _______________________________________________
> NOTE: Please use clear subject lines for your posts.
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------------------------------
Message: 2
Date: Wed, 7 Dec 2023 09:57:30 -0800
From: Dave Singer 
Subject: Re: [Mp4-tech] Stsd Entry for Mp4 file containing AVC
To: INDERPAL SINGH GANDHI ,
 mp4-tech lists.mpegif.org
Message-ID: 
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
At 12:32  +0000 5/12/05, INDERPAL SINGH GANDHI wrote:
>
>Hello Experts,
>
>I am trying to understand the .mp4 file format for the AVC(H.264). 
>As I came to know, the SPS and PPS Headers reside in the Stsd table 
>of mp4 file. And there are 2-3 new table entries in Stbl field.

You'll need 14496-15, and maybe 14496-12 for the full documentation.
>
>Can someone throw some more light on the structure of stsd table and 
>about the new tables for mp4 files containing AVC as video?
>
>Is there any documentation freely available on the net?

14496-12 is freely available, yes, from ISO.
>
>From where can i get a reference parser code which parses a .mp4 
>file containg AVC as video?

The MP4 file format software covers all the mandatory structural 
stuff, and can easily be used to read/write files.  The support for 
the extensions and optional stuff is in hand.
-- 
David Singer
Apple Computer/QuickTime
------------------------------
Message: 3
Date: Wed, 7 Dec 2023 14:19:46 -0800 (PST)
From: Jack Holt 
Subject: [Mp4-tech] switching containers - .mp4 to .mpg
To: mp4-tech lists.mpegif.org
Message-ID: <20051207221946.83641.qmail web35304.mail.mud.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi everybody!
 I'm looking for a way to change the container of my file (encoded with x264, the open source one) from mp4 to mpg. That's for streaming purpose. I know that MainConcept H.264 is encoding in mpg but I found x264 better in terms of quality.
  Thanks,
   - Dan
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