[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



More information about the mythtv-users mailing list