[mythtv-users] Mencoder magic for Internal player
Neil Dunbar
neil.dunbar at pobox.com
Tue Dec 11 14:29:14 UTC 2007
On Tue 11 Dec 2007 14:12:48 Joe Ripley wrote:
> A simple 'mythcommflag -f <filename> --rebuild' solved it for me.
> After this I could FF/REW, jump, skip, etc. normally (with minimal
> image corruption). mythcommflag must be marking keyframe byte
> positions or something... I'm not sure.
>
> Since you're doing external videos and not recordings, look into the
> '--video' command switch for mythcommflag.
Yup - I normally do this. And, as I say, with MPEG-2 files, they work just
hunky-dory. It's only AVIs which I produce using MPEG-4 (lavc) - I tend to
leave sound alone, since there's nothing to be gained by transcoding it. I'll
see if xvid4 produces better effects when I have time (although xvid4
generation is VERY slow compared to lavc). I also ensure that keyframes are
more liberally scattered within the file - every 30 frames rather than the
default 250. Sadly, that doesn't help. I've wondered if shifting the system
control dev.rtc.user-max-freq from 64 to 1024 might help as well, but that's
a long shot - at best.
Cheers,
Neil
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