[FFmpeg-devel] [PATCH] Enable PAFF decoding

Reinhard Nissl rnissl
Sun Oct 14 17:16:52 CEST 2007


Loren Merritt wrote:

>>> Isn't that like with mpeg2? Take any piece out of a continous stream (TV
>>> broadcast, ...) that starts with a sequence header (mpeg2) or IDR frame
>>> (h264). In both cases there are B-frames before the I/IDR in
>>> presentation order. Decoders should skip them as they can't get decoded
>>> properly - neither with mpeg2 nor with h264....
>> But in MPEG2, there exists the closed group of pictures flag which
>> means, that such B frames would only reference the previous I frame and
>> not any P or I frame of the previous GOP, which is not available for
>> decoding in such a case.
> H264 has a closed GOP flag too: it's called IDR.

Sure. BTW: is there something similar to MPEG2's broken link flag in H.264?

Dipl.-Inform. (FH) Reinhard Nissl
mailto:rnissl at gmx.de

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