FS#3728 - mplayer can't capture sound with v4l capture card

Attached to Project: Arch Linux
Opened by Todd Musall (twm) - Sunday, 08 January 2006, 04:00 GMT
Task Type Bug Report
Category Packages: Current
Status Closed
Assigned To arjan timmerman (blaasvis)
Architecture not specified
Severity Medium
Priority Normal
Reported Version 0.7 Wombat
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

After upgrading to kernel 2.6.15 mplayer and mencoder no longer have sound when playing/encoding from a v4l TV capture card. Sound works fine with kernel 2.6.14. Using mplayer package 1.0pre7-2.
This task depends upon

Closed by  arjan timmerman (blaasvis)
Saturday, 11 February 2006, 13:54 GMT
Reason for closing:  None
Comment by Simon Morgan (sjmorgan) - Sunday, 08 January 2006, 18:13 GMT
If you haven't already it might be worth trying xine to confirm it's a problem with mplayer rather than the driver for your TV card. If 2.6.14 works it would seem to indicate the latter.
Comment by Jan de Groot (JGC) - Sunday, 08 January 2006, 18:31 GMT
Do you have sound with applications like tvtime?
It seems the v4l stack had an update in 2.6.15, you can play sound from your TV tuner with either alsa or OSS now. On my system, using saa7134 with some workarounds (have to load tda9887 tuner module with special options, otherwise I can't tune :P), none of the sound modules get loaded. I use the passthrough cable from my TV card to my soundcard line-in, so I don't have a problem with that.
Comment by Todd Musall (twm) - Sunday, 08 January 2006, 20:27 GMT
Tvtime works fine under 2.6.15 (didn't try xine). I also use the passthrough cable from my capture card to line-in. It seems only mplayer/mencoder have this problem. It appears others have a similar problem:
http://lists.debian.org/debian-amd64/2005/12/msg00459.html
So this most likely is kernel related.
Comment by Todd Musall (twm) - Sunday, 08 January 2006, 20:41 GMT
I was going to test xine, but can't figure out how to get it to use a v4l capture device. Anyone know what's required?
Comment by Simon Morgan (sjmorgan) - Monday, 09 January 2006, 11:59 GMT
I thought xine had v4l support but I'm not so sure now. Google for "xine v4l" and you get a few results that suggest you can do "xine v4l://", but it doesn't seem to work.
Comment by Todd Musall (twm) - Monday, 09 January 2006, 23:24 GMT
I tried xine v4l:// and it worked... well sorta. Sound did turn on, but I got a nice double echo effect. After muting from xine's gui I got normal sound (no echo). When xine exited the sound remained on. So, yeah, xine works.

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