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Revision 8de45adb

ID8de45adb37bb0591626645e1f7d1303339b2bc9f
Parent d5551265
Child a2eef3e9

Added by Philip Langdale about 9 years ago

CrystalHD: Add auto-detection of packed b-frame bug.

I still don't fully understand the cause but the difference between
the samples that trigger the bug and the samples that don't is
that the former uses delay frames and the later uses drop frames
as placeholders for the packed frame. So, if we see the one type
of frame, we can assume the bug will or won't be present.

Right now, I'm detecting the frame types by size, which may not be
safe in general, but given the specific codec and file type, I
expect any scenario where we encounter these frames where they
aren't being used for b-frame packing won't care one way or
another whether the work around is in effect or not.

Signed-off-by: Philip Langdale <>

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