Jonathan Foste wrote:
> Currently I am not getting any sound from my hvr-1600. I have tried
> the following:
> cat /dev/video0 > /data/recordings/try2.mpg
> I then play that file with:
> mplayer /data/recordings/try2.mpg
>
> I get video but no sound. I have also tried playing directly from
> /dev/video0 using vlc, mplayer, and xine. On all of them i get a
> picture but no sound. Any sugestions?
First try turning your sound/volume up as high as you can. The beta
cx18 driver currently only has mono sound for analog capture from the
tuner, and it's a pretty low level.
Try a DVD player or VCR on the audio line in and switch to Composite
Video 1 or S-Video 1 to see if you can capture sound on those.
If that does work, compile the vl2-dbg utility and try this to
temporarily boost the tuner (and line in) audio:
$ su - root
Password:
# v4l2-dbg -d /dev/video1 -C
host 0x0: cx23418 revision 0x00000000
i2c 0x4c: cs5345 revision 0x00000000
# v4l2-dbg -d /dev/video1 -R type=i2cdrv,chip=cs5345
ioctl: VIDIOC_DBG_G_REGISTER
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00000000: e2 00 08 01 10 40 00 00 01 00 00 c0 00 00 00
00000010: 00
# v4l2-dbg -d /dev/video1 -r type=i2cdrv,chip=cs5345,reg=7,val=0x18
register 0x7 set to 0x18
# v4l2-dbg -d /dev/video1 -r type=i2cdrv,chip=cs5345,reg=8,val=0x18
register 0x8 set to 0x18
# v4l2-dbg -d /dev/video1 -R type=i2cdrv,chip=cs5345
ioctl: VIDIOC_DBG_G_REGISTER
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00000000: e2 00 08 01 10 40 18 18 01 00 00 c0 00 00 00
00000010: 00
The above sets the L and R channel gains on the cs5345 baseband audio
digitizer/multiplexer chip to its maximum +12 dB ( +0.5 dB * 0x18) from
it's normal setting of 0 dB.
If it works, this is a temporary workaround until the cx18 tuner audio
handling is fixed.
-Andy
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