[Mp4-tech] MP4 file parser

[Dave Singer]

At 6:52 AM +0000 8/21/04, MRUKANT POPAT wrote:
>hi all,
>I have some queries on MPEG-4 file parser.
>I have read chapter 13 of 14496-1 which describes MPEG-4 file format.
>I also came across 14496-12 (ISO Base Media file format).
>I have certain queries after reading both documents, which I hope you
>guys can help me solve.
>
>query1:- I have understood that ISO Base Media file format is superset
>for all media file formats. Am I right? If not how does it differ from
>other media file format?

This is such a general question I am not sure how to answer it.
>
>query2:- If I implement parser for MPEG-4 files, does it have to look
>for atoms mentioned in 14496-12 (ISO Base Media file format) or the
>atoms mentioned in chapter 13 of 14496-1.

If you are looking at a full spec. in chapter 13, that pre-dates the 
making of part 12.  I['d suggest lookign instead at parts 12 and 14. 
Yes, you should look at all atoms mentioned in parts 12 and 14.
>
>regards,
>MRUKANT
>
>
>
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-- 
David Singer
Apple Computer/QuickTime
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