[mythtv-users] Trouble with HD playback
Michael S. Keller
samsara at tulsaconnect.com
Mon Nov 1 23:26:28 UTC 2004
> Xv helps, but a ton is still done in hardware. XvMC does a whole lot more in
> hardware, but doesn't look as good (and places other limitations on what you
> can do w/your output in Myth). However, judging from the guy who is able to
> play back those HD clips on a 1.4GHz Celery w/a GF FX 5200 and XvMC, it does
> help out a ton, so you might try that w/your onboard graphics...
That was me. Once my cards arrive, if I can get the automatic transcode
to produce satisfactory results, I should be happy. So far it's a
problem, because A/V sync is off after transcoding to MPEG4 (regardless
of MPEG2 source), it's no longer using XvMC and the aspect ratio is
wrong. It stutters even when I drop the transcode bitrate to lowest
> DVDs are 720x480, HDTV (in its two best forms) is 1280x720 or 1920x1080. That
> ABC clip is 1280x720, the CBS clip is 1920x1080.
The ABC clip played fine. The CBS clip's audio was a bit off and it
wasn't scaled right (1/4 to 1/3 of the image was missing off the right
side), but what I could see was smooth and the A/V sync was good. In
both cases, bringing up the OSD brought immediate stutter and the only
way to clear it was to save position, exit and play again.
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