[Mp4-tech] Track-ID & ES-ID in mp4 file

[Dave Singer]

At 12:27 PM +0000 8/25/04, MRUKANT POPAT wrote:
>Is the track-ID (inside track header atom)always similar to ES-ID of 
>corresponding elementary stream in a mp4 file? If it is different, 
>when is it different.

from 14496-1:
13.2.1.4	Track Identifiers
The track identifiers used in an MP4 file are unique within that 
file; no two tracks may use the same identifier.
Each elementary stream in the file is stored as a media track. The 
lower two bytes [of the track identifier] are the elementary stream 
identifier (ES_ID).  The upper two bytes are zero.
>
>regards,
>MRUKANT
>
>
>
><http://clients.rediff.com/signature/track_sig.asp>
>
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-- 
David Singer
Apple Computer/QuickTime
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