On Thu, 2008-08-07 at 07:28 +0200, Hans Verkuil wrote: > On Thursday 07 August 2008 00:23:40 Lonnie Borntreger wrote: > > On Wed, 2008-08-06 at 22:32 +0200, Sebastian Buks wrote: > > > I have a problem that hasn't been here all the time. I think it > > > happened when I upgraded from Ubuntu 7.10 to 8.04. However this > > > might be wrong. Reverting the kernel (and thus the driver doesnt > > > give anything). When I check my devices I see that tuner1 has no > > > audio detected while tuner0 has it. Video works fine on both > > > devices. I have no clue on why suddenly one of the tuners not > > > detecting the audio stream. > > > > > > I read back on the list and found at least one other thread where > > > similar things happened but the thread was suddenly stopped and no > > > more information was given. Here are my "v4l2-ctl --log-status -d > > > 0" and "v4l2-ctl --log-status -d 1": > > > > > > Hope anyone can help me on this, right now I'm stuck with only one > > > tuner... > > > > I had the issue where after a year of working perfectly, one of my > > tuners started not getting audio. Then several months later the > > other did the same. My fix was to add the following to > > /etc/rc.d/rc.local: ivtvctl -d /dev/video0 -q1 > > ivtvctl -d /dev/video1 -q1 > > > > I did it for the first tuner with issues, and just duplicated it when > > the other developed the same issue. > > > > I'm on old drivers (as long as it works, I don't upgrade), so maybe > > the options have changed, but for the version I have here, -q does: > > -q, --set-audio-input=<num> > > set the current audio input to <num> [VIDIOC_S_AUDIO] > > What -q1 does is that the audio demodulator is bypassed and you just get > mono audio. I would suggest testing under Windows first: I suspect > broken hardware.
I'm quite sure that you are correct in pointing at the hardware, since it's the same driver and kernel version that I've always used. I thought the same about the mono when I first tried it (since that is what the driver docs said), but oddly enough, in my office I have my speakers pretty far to each side of my head, and I can definitely hear stereo on most of my recordings. Maybe it's just "punting" the hardware and it starts working properly after that - I only have to do it once upon boot-up. If so, then it most likely is directly related to the type of hardware issue and will not be reproducible by anyone else. Here's something really weird (keep in mind that if I don't do the -q1 when the computer boots up, I get no sound), running "-Q" reports that the inputs are using "Audio Input = 0: Tuner Audio In" If I re-run the -q1 followed by -Q, I get "Audio input = 1: Audio Line 1" - and it definitely sounds like mono... running -q0 gets me back to stereo. Lonnie _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
