[FFmpeg-devel] [PATCH] Clip-Wrapped MXF support (attempt #4)

Benjamin Larsson banan
Mon Feb 21 21:43:12 CET 2011

On 02/21/2011 01:34 PM, Maksym Veremeyenko wrote:
> Benjamin Larsson ???????(??):
>> On 02/21/2011 12:36 PM, Maksym Veremeyenko wrote:
>>> Benjamin Larsson ???????(??):
>>> [...]
>>>> I think the best way to support these kind of files is to parse the
>>>> file
>>>> to find all mxf indexes and then generate one index that is use for
>>>> getting packets and seeking. These kind of streams are actually VBR as
>>>> the first frame is ca 100bytes larger then the rest. Using a fixed
>>>> EditUnitByteCount will cause bad framing or the need to drop the first
>>>> frame.
>>> Great! Could you provide a patch for this?
>>> Is it better to apply this patches and find a minimal support of
>>> Clip-wrapped MXF files or wait until somebody who interesting in VBR
>>> support will ever implement that feature?
>> I need this feature. And I intent to implement it also.
> So you have own patches set for implementing VBR Clip-Wrapped support?
> I am also interesting what is source of VBR Clip-Wrapped files?

Well I meant I need the P2 support feature and the P2 files are pseudo
VBR. The P2 files seem to demux properly now, I implemented a somewhat
ok solution. But I don't have any player for avc intra so I'm not sure.

Benjamin Larsson

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