[Mp4-tech] 264 and CC

[Dave Singer]

At 9:46  -0800 8/12/05, Thierry Foucu wrote:
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>Hi,
>
>I'm looking for some spec describing how to encode CC in MPEG4?
>
>In MPEG2, we put the CC in the user private data at the frame level.
>What about H.264?
>
>Is there any paper out there describing such thing? Any sample?
>
>Thanks
>
Thierry
Closed Captioning is best carried as a separate stream, in my 
opinion.  There's nothing that makes it specific to the video 
compression, after all.
There are specs from 3GPP (3GPP Timed Text) and ISMA (carrying closed 
captioning data in MP4 files) that might help you.
-- 
David Singer
Apple Computer/QuickTime
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