[FFmpeg-devel] [RFC] better ogg seeking, keyframes only
Sun Mar 23 16:37:05 CET 2008
On Wed, Mar 19, 2008 at 01:16:16PM +0100, Reimar D?ffinger wrote:
> I admit this is a rather ugly patch, but it improves things a lot, so
> maybe you can have a look and get it committable.
> There are several issues with seeking: for audio, PKT_FLAG_KEY is never
> set, so the patch ignores it there, the data_offset set by the code in
> util.c is wrong, so this code overrides it, and the most annoying
> thing: a keyframe most likely is split over multiple ogg pages, so
> this code just returns the start of the last page read by the last
> get_packet as start offset for the keyframe - this means we might
> actually end up a few frames before the key frame (in theory up to 255),
> if the encoded frames are very small.
Hmm, I still get artifacts when seeking in Theora video, for example
with the samples from mphq...
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