[mythtv-users] choppy audio during/after recording TV

Dean Wilson dean.k.wilson at gmail.com
Wed Mar 30 22:28:40 UTC 2005


I'm having trouble with recorded audio through my PVR250, and I'm
hoping someone here can point me in the right direction to resolve the
issue.

When I first boot my mythTV box, I can use "mplayer -vo xv
/dev/video0" to play a video stream with no problems -- both audio and
video are fine.  (The same holds true when I'm watching live TV in
mythTV.)

However, once I record a program, the audio gets louder and extremely
choppy.  What's worse -- once I've recorded a program, the audio
problem persists even after quitting mythTV !  (Running "mplayer -vo
xv /dev/video0" has choppy audio as well).  The only fix I've found so
far is to reboot the machine.  (Unfortunately, this only works until I
try to record again, which renders my PVR250 with mythTV rather
useless...)

Has anyone encountered a similar problem?  It seems like mythTV may be
making a change to the card settings, but I don't know how to figure
out what the change is, or what to do about it.

I'm relatively confident that the problem isn't in my audio setup --
sound (and recordings) continue to work just fine for my Air2PC card,
and music/Videos play without any problem.

I'm running 
mythbackend version: 0.17.20050130-1
mythfrontend version: 0.17.20050130-1
compiled with internal ALSA support and ALSA:spdif

Any help would be greatly appreciated...
~Dean

Output from mythbackend: <snipped>
2005-03-30 16:06:19.304 Changing from None to WatchingLiveTV
2005-03-30 16:06:34.096 Reschedule requested for id 41.
2005-03-30 16:06:34.253 Scheduled 81 items in 0.2 = 0.10 match + 0.05 place
2005-03-30 16:06:34.395 Changing from WatchingLiveTV to None
2005-03-30 16:06:34.480 Started recording "Home Improvement" on
channel: 2010 on cardid: 2, sourceid 2
2005-03-30 16:06:34.986 Changing from None to RecordingOnly
2005-03-30 16:06:35.053 MainServer::HandleAnnounce Playback
2005-03-30 16:06:35.053 adding: hercules.hepcats.net as a client (events: 0)
2005-03-30 16:06:36.102 MainServer::HandleAnnounce Playback
2005-03-30 16:06:36.102 adding: hercules.hepcats.net as a client (events: 0)
2005-03-30 16:07:33.350 Reschedule requested for id 41.
2005-03-30 16:07:33.441 Scheduled 81 items in 0.1 = 0.00 match + 0.09 place

Output from mythfrontend <snipped>
2005-03-30 16:06:37.014 Opening audio device 'spdif'.
2005-03-30 16:06:37.021 Using XV port 145
2005-03-30 16:06:37.166 Using realtime priority.
2005-03-30 16:06:37.167 Changing from None to WatchingRecording
2005-03-30 16:06:37.269 Video timing method: RTC
2005-03-30 16:06:54.215 Changing from WatchingRecording to None
2005-03-30 16:06:54.221 Changing from None to None


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