The cards are Terratec, v4l API, bttv0.7, with sound by cable into the
MIC input of a sound card. The capture app is home-made. We have several
capture machines running, for different TV channels.
The problem is that the sound volume is abnormally low on some channels,
and even seems to change over time. But the software checks that the TV
card has VIDEO_VC_AUDIO but *NOT* VIDEO_AUDIO_VOLUME, because I have not
yet a TV board on which I could validate volume control code via the TV
(volume control is currently done via the sound muxer, and that works).
Can anyone suggest anything? Maybe the flag detection is wrong and the
Terratec *has* volume control. Maybe I am just cursed...
PS: it seems the problem is the same with PinnaclePCVT(card=39) and/or
with bttv0.9.
TIA,
--
Michel Bardiaux
Peaktime Belgium S.A. Bd. du Souverain, 191 B-1160 Bruxelles
Tel : +32 2 790.29.41
