[FFmpeg-devel] [PATCH] Fix Ogg data_offset computation.

[Aaron Colwell]

> If (in your example) only the first audio packet is demuxed and then
> a seek is done, the video packet will never be demuxer and thus
> data_offset will stay wrong.
>

You are right. I've attached a new patch that makes sure that
data_offset is set properly before ogg_get_headers() returns. This
should prevent the scenario you described.

A proper fix means you have to set data_offset already when the

> first packet is read/parsed.
> Concerning "valid Ogg file or not" I can only think, valid it may be,
> it just would be nice to find something one could call a "sane Ogg file".
>

I agree that it would be nice to have a stronger definition of "sane", but
unfortunately stuff like this appears to be par for the course in ogg.
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