[mythtv] [PATCH] Plextor PX-TV402 / go7007 keyframe seek fix
jack at porter.net.au
Mon May 30 07:10:29 UTC 2005
Thanks for the reply, I resolved the issue. Short answer: there's no bug
in your filters, and the bug was in my patch.
Long answer: it was caused by my first attempt at a seek synchronization
fix for the MPEG4 files the Plextor hardware generates. I was dropping
frames up to the first I-frame which mostly solved my seek problem. But
that fix is no longer necessary now that I am generating NUV sync frames
synchronized with the I-frame in the MPEG4 data coming from the hardware.
Torbjörn Jansson wrote:
> I asume you mean the filters i wrote (sf.net/projects/dsmyth)
> I haven't followed this thread very closely, but is audio always out of sync
> or only after you have seeked forward or back?
> And it's not safe to asume that all keyframes is keframedist frames apart,
> remeber the file can have been transcoded and cut.
> Getting the audio and video timestamps right is a bit complicated, for
> example the filters have to take into account that timestamps can have some
> wierd values especialy at the begining of the file and just because the
> seektable says there is a keyframe at a specific position doesn't mean that
> is always the case (old bug in mythtv, fixed long ago)
> mythtv-dev mailing list
> mythtv-dev at mythtv.org
Jack Porter Programmer
jack at porter.net.au Softmax
jack at softmax.co.kr South Korea
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