[Bug 21375] Decoding dependencies

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21375

--- Comment #3 from Cyril Concolato <cyril.concolato@telecom-paristech.fr> ---
(In reply to comment #2)
> Change committed.
> https://dvcs.w3.org/hg/html-media/rev/f7f2b7226543
> 
> Added text to clarify what should happen if detailed information about the
> exact decoding dependencies is not available.
Thanks, the text helps but I don't think it covers everything.

"Remove all coded frames between the coded frames removed in the previous step
and the next random access point after those removed frames."

What if you have no RAP picture as in videos using Gradual Decoding Refresh,
where  it's the decoding of N consecutive frames that produces a RAP.

Also, what if you have an Open GoP ? Removing up to the next RAP does not
guarantee that the frames after the RAP will be decodable. 

Basically, there should be only simple SAP (as defined in DASH) in the sequence
for this to work.

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Received on Wednesday, 10 April 2013 15:36:49 UTC