I have this problem where (for some unknown reason), MythTV will mute my TV card's audio out periodically. This results in recordings with no audio. It's not a frontend or sound card issue. I have found it can be re-enabled by issuing a command to the v4l driver, namely, "v4lctl volume mute off".
I tried putting this command into a cron job, but the problem is that everytime it's run, it causes a 1/2 second blank out of the audio. I then tried putting it into the "external command" for changing channels tuner, but the problem is that when that happens, Myth doesn't change the channels properly anymore because it thinks my unmute-volume script is doing the job.
Is there some way that I could get MythTV to run my script when starting a recording? Or how can I poll the MythTV tuner status? Since that info is not stored in mythconverg, I was thinking of polling and parsing the last 1000 or so lines from the mythbackend log file every minute.
Thanks!
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