[Bug 29789] Re: tv card audio not working

bdowd bdowd at dentfirst.com
Thu Mar 6 22:38:08 UTC 2008


Increasing the bttv buffer size makes a large difference in length of
time audio will play back successfully using the BT878 (in the Hauppauge
WinTV PVR-350). I am using an Audigy 2 sound card. The CPU is an Intel
3Ghz with only 512K RAM.

sudo gedit /etc/modprobe.conf and change the value of gbuffers to 512

mplayer /dev/video0

Lengths of time audio and video interleave properly until "Cannot sync
MAD frame" error occurs. Both video and audio stop; then the video
restarts but the audio does not:

gbuffers=16   (29 seconds)
gbuffers=32   (1 minute 10 seconds)
gbuffers=128 (5 minutes 11 seconds)
gbuffers=256 (18 minutes 33 seconds)

SO I kept increasing gbuffers and rebooting the machine. Didn't work.
Even backing the values down again ... it now hangs after 5 seconds to a
minute. Heat?

The single line in /etc/modprobe.conf now reads "options bttv radio=1
tuner=28 card=72 gbuffers=128 i2c_delay=128"

-- 
tv card audio not working
https://bugs.launchpad.net/bugs/29789
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