[Mp4-tech] H.263 Non-standard Resolution

[Dzung Hoang]

The H.263 standard specifies the video bitstream syntax and decoding
semantics. MOV is a container format. A compliant H.263 decoder should
follow the H.263 standard and not the MOV format. This is clear and
unambiguous. The question about what resolution a player application should
display is up for debate.
Regards,
- Dzung Hoang
   _____  
From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Mohit Garg
Sent: Tuesday, November 20, 2023 2:51 AM
To: Mario Tilli
Cc: mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech] H.263 Non-standard Resolution
Thanks Mario.
Yes. It should move to the nearest multiple of 16. However, my basic doubt
is w.r.t. the resolution given in the container vs. the resolution in the
bitstream. Is there a convention as to what should override the other in
case of a conflict? 
regards
Mohit
On Nov 19, 2023 7:21 PM, Mario Tilli <HYPERLINK
"mailto:mario7102 hotmail.it"mario7102 hotmail.it> wrote:
Hi, I suppose that your decoder accepts only multiple of 16 video format, so
the decoder will be bring 240x180 near the first integer multiple of 16, for
example 240x192
   _____  
Date: Mon, 19 Nov 2023 13:21:10 +0530
From: HYPERLINK "mailto:lists.mohit gmail.com" \nlists.mohit gmail.com
To: HYPERLINK "mailto:mp4-tech lists.mpegif.org" \nmp4-tech lists.mpegif.org
Subject: [Mp4-tech] H.263 Non-standard Resolution
Hi All,
Apologies if this is a dumb question but I could not find any discussion on
this anywhere. I would be grateful if you could spare a few minutes to help
me with this. 
I have a H263 video contained in a MOV file: 
*	The resolution specified in the H.263 bitstream is 352x288 (CIF)
*	The resolution specified in the MOV header is 240x180
What is the desired decoder behaviour? Which of the above over-rides the
other? 
Any pointers to a standard/acceptable-practice would be really helpful. 
thanks and regards
Mohit Garg
Personal Homepage: HYPERLINK "http://www.mohrahit.in/" \nwww.mohrahit.in
Social Work: HYPERLINK "http://www.noragging.com/" \nwww.noragging.com 
   _____  
Tutti i tuoi account di posta sul desktop..con Windows Live Mail! HYPERLINK
"http://www.windowslive.it" \nWindows Live Mail
_______________________________________________
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 HYPERLINK
"http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php"
\nhttp://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.503 / Virus Database: 269.16.1 - Release Date: 11/19/2007 12:00
AM
No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.503 / Virus Database: 269.16.1 - Release Date: 11/19/2007 12:00
AM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20071120/4e37be03/attachment.html