[mythtv-users] Issue with the default sound volume on my PVR-150

Rage321 rage321 at optonline.net
Tue May 8 22:23:06 UTC 2007


Hi all.

When I first installed my PVR-150, everyone was more or less good to go.  I
noticed that during playback my recordings would have a noticeable hissing
sound that I couldn't figure out how to get rid of.  After a couple of days
googling, I figured out that the problem was that Myth was resetting any
volume settings I had set for the PVR-150, (v4l2-ctl
-set-ctrl=volume=63500), and using one much lower.  Once I started recording
I would run v4l2-ctl -set-ctrl=volume=63500 and everything would be fine
with that specific recording.  Audio playback was great.  No more noticeable
hissing until Myth tried to recording something else when it would reset the
volume again.

I created the following cronjob...

* * * * * /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 5; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 10; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 15; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 20; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 25; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 30; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 35; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 40; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 45; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 50; /usr/bin/v4l2-ctl -set-ctrl=volume=63500
* * * * * /bin/sleep 55; /usr/bin/v4l2-ctl -set-ctrl=volume=63500

.which resets the volume to what I want every 5 seconds.

To me, this is a band aid and am coming here to see if someone else has a
better solution for me.


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