Issue 175 in mp4v2: Support for Track Reference Atoms

[mp...@googlecode.com]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium

New issue 175 by raftisa...@gmail.com: Support for Track Reference Atoms
https://code.google.com/p/mp4v2/issues/detail?id=175

I recently learned about the track reference atoms. These are really useful
for describing the relationship between tracks within an alternate group,
and are used by Apple TV (and probably other players) to determine the
correct tracks to use within an alternate group. For example:

'forc' - Marks a subtitle track as "forced"
'fall' - Marks a track as a fallback or another track. For example an AC-3
audio track could mark an AAC audio track as a fallback.
'folw' - Marks a "following" track. For example, you have two subtitle
tracks, one forced and one full track. In an audio track, this indicates
the primary subtitle track, and in a subtitle track, this indicates the
alternate subtitle track.

There's others that could also be useful, but these are the most important.

What version of the product are you using? On what operating system?

Version 2.0

Please provide any additional information below.

Gory details about these atoms can be found at:
https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html

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[mp...@googlecode.com]

Comment #1 on issue 175 by raftisa...@gmail.com: Support for Track
Reference Atoms
https://code.google.com/p/mp4v2/issues/detail?id=175

I'm not sure if I missed it or not, but this should be entered as an
enhancement.