[Mp4-tech][Video] Short video header

[pankaj bajpai]

Hi Alex!!
Some of the conformance bitstrems for Mpeg4 Shortvideoheader are available at 
http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_IEC_14496-4_2004_Conformance_Testing/video_conformance/version_1/simple/short.zip
In this zip floder, following 5 sequences I think have some errors as the Microsoft decoder (July 3rd 2000 version 2 FDAM1-2.3-001213) fails on the following streams:
1. short\hit035.m4v
2. short\mit021.m4v
3. short\mit022.m4v
4. short\mit023.m4v
5. short\mit024.m4v
I guess the error is that the resync marker are appearing at not align boundary.
If some one has more bitstreams, then please share them.
With regards
pankaj
From: Alex <zombiyaga yahoo.com>
To: tma iis.fhg.de Sandip Parikh <sparikh sarnoff.com>
Cc: mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech][Video] Short video header
Date: Sat, 5 Nov 2023 13:27:14 -0800 (PST)
Hi All,
Do you have any samples of MPEG-4 (short header mode)
?
thanks,
----- Original Message -----
From: mp4-tech-request lists.mpegif.org
To: mp4-tech lists.mpegif.org
Subject: Mp4-tech Digest, Vol 28, Issue 3
Date: Sun, 6 Nov 2023 12:13:02 -0500 (EST)
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>     1. Re: [Mp4-tech][ISO-fileformat] stco box (Dave Singer)
>     2. Re: [Mp4-tech][Video] Short video header (Alex)

From: Dave Singer <singer apple.com>
To: agulati neomagic.com mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech][ISO-fileformat] stco box
Date: Fri, 4 Nov 2023 11:57:40 -0800
>
> 
> At 12:27  +0530 2/11/05, Atul Gulati wrote:
> > Hi,
> >
> > I am currently working on a Player for encrytped MPEG4 File. 
> > According to the encryption standard only the samples are 
> > encrypted (actual frames) and not meta data. But the encrpyption 
> > is done not per sample , but taking a chunk as a block.
> >
> > From the "stco" box i am able to get the chunk offset but not the 
> > size of the chunk. Is there any way i can get the size of the 
> > chunk.If need the size and the offset both for the chunks present 
> > in the MPEG4 File.
> 
> The sampel to chunk box tells you how many samples are in each 
> chunk, and the sample size box tells you how big each is;  sum the 
> sizes of the samples...
> 
> >
> > Regards,
> > Atul.
> >
> > _______________________________________________
> > 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: Alex <zombiyaga yahoo.com>
To: tma iis.fhg.de Sandip Parikh <sparikh sarnoff.com>
Cc: mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech][Video] Short video header
Date: Sat, 5 Nov 2023 13:27:14 -0800 (PST)
>
> 
> Hi All,
> 
> Do you have any samples of MPEG-4 (short header mode)
> ?
> thanks,
> 
> 
> --- Herbert Thoma <tma iis.fhg.de> wrote:
> 
> > Sandip Parikh wrote:
> > > > Hi,
> > > > Could someone please clarify short_video_header
> > for me:
> > > > At the elementary stream level
> > (video_plane_with_short_header() and
> > > below) is a MPEG-4 stream with short_video_header
> > = 1 identical to a
> > > H.263 stream in syntax or there is a difference ?
> >
> > MPEG-4 short_video_header is identical to h.263
> > baseline, i.e. h.263
> > without any annex.
> >
> > Regards,
> >  Herbert.
> >
> > > Thank you,
> > > > Regards,
> > > > Sandip Parikh
> > > > _______________________________________________
> > > 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
> >
> 
> 
> --
> Regards,
> Alex
> 
> 
> 		
> __________________________________
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>
> 
> _______________________________________________
> 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.
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> Conduct on the mailing list is subject to the Antitrust guidelines 
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> http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php

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