[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, 2007 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, 2007 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 2007 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 

 

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