[mythtv-users] Stuttering only when audio enabled (dropping frames).
Calin Brabandt
cbrabandt at yahoo.com
Tue Jul 4 21:16:41 UTC 2006
I'm running Via Openchrome XvMC on a P4M800Pro
motherboard. When I set the audio device to /dev/null
(or other nonsense), playback is smooth. When I set
it to ALSA:default or /dev/dsp, Myth drops frames on
playback (live TV or recordings). It also drops
frames with the standard (non-Via XvMC) decoding
setting.
I've tried all the audio options available in
mythfrontend Utilities/Setup >> Setup to no avail (and
pretty much every other option too!)
Here's the output from mythfrontend -v playback
With ALSA:
http://home.comcast.net/~calinb/myth_audio
Near the bottom, you'll see the
"2006-07-04 13:15:00.916 NVP: Video is 3.05305 frames
ahead of audio, dropping frame."
which goes on continuously. (This was a short run).
With /dev/null:
http://home.comcast.net/~calinb/myth_null
there are no frame drops once playback stabilizes.
Also, without HT on FC5-32, HDTV results in cpu loads
around 60% with 3.2GHz Prescott. This seems high but
it appears XvMC is being used, based on the output
above.
Any suggestions are much appreciated.
-Cal
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