[M4IF Technotes] Object Descriptor Framework

[Dave Singer]

At 19:59 +0530 4/17/02, Chandra Sekhar Reddy G wrote:
>hi Bodo,
>
>If you are talking of MP4 File Format,
>Each  Elementary Stream in the MP4-File is stored as a Media Track.
>The Track is identified by a trackID (you can exploit the point that this
>trackID should be related to the ES_ID of the Elementary Stream it is
>carrying!)

It should be the same;  the MP4 file format says that the ES_ID and 
the track_ID are the same for elementary streams.  The ES_ID stored 
inside the ES Descriptor inside the track is zero;  this needs to be 
updated when the ES Descriptor is inserted into the OD stream or IOD 
(also the SL Config Descriptor will need updating to reflect the 
actual stream format, and so on).
>
>For MP4 File Format, you can directly relate with:
>ObjectDescriptor::ES_ID_Inc[]::Track_ID;
>
>otherwise, you can relate with:
>TrackBox[]::SampleTableBox::SampleDescriptionBox::SampleEntry[]::ESDBox::ES_
>Descriptor::ES_ID;
>
>Experts- please correct me if i am wrong.
>
>regards,
>Chandra
>
>
>
>----- Original Message -----
>From: <bodo.thiemann   philips.com>
>To: <Technotes   lists.m4if.org>
>Sent: Wednesday, April 17, 2024 7:02 PM
>Subject: [M4IF Technotes] Object Descriptor Framework
>
>
>>  Object Descriptors in the Object Descriptor Stream contain the ES IDs of
>the elementary streams linked
>>  to the OD ID. It is not clear to me, how the individual audio, visual
>(...) streams are then
>>  linked to the ES IDs ? Is this completely handled by DMIF ?
>>
>>  Thanks for your help,
>>
>>  Bodo
>>
>>  ----
>>     Bodo Thiemann,
>>     Systems Engineer, Philips Semiconductors, Systems Laboratory Hamburg
>>     Department: Software & Multimedia - Compression & Storage Systems
>(SM-CSS)
>>     Stresemannallee 101
>>     22529 Hamburg, Germany
>>
>>     Phone: +49 40 5613-3318,   Fax: +49 40 5613-3525,  E-Mail:
>Bodo.Thiemann   philips.com
>>
>>
>>
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-- 
David Singer
Apple Computer/QuickTime