[mythtv-users] running something on every channel change

[Neale Pickett]

My ASUS DigiMatrix requires, for some reason, the following command to be run 
after every channel change:

  amixer -c 1 sset Video,0 nocap; amixer -c 1 sset Video,0 cap

Basically, I have to turn off capturing and then turn it back on, on a 
particular mixer control of ALSA card #2.  I don't know why.

Anyway, is there any sneaky way to get MythTV to do this for me, while 
watching TV and recording programs?  Currently I have it doing this every 
minute in cron but that's up to a 1-minute delay.

I saw the "channel change command" in the mythtv-setup but I don't know how to 
change the channel from the command line.  If there's a program I could use 
to do that, I could wrap all three commands in a shell script and use that.

Thanks in advance,

Neale