[mythtv-users] What Tuner Did a Recording Come From?

Ronald Frazier ron at ronfrazier.net
Sat Sep 10 12:14:57 UTC 2011

On Sat, Sep 10, 2011 at 6:38 AM, Dan <dansto.well+myth at gmail.com> wrote:
> Yes! It would be useful. I'm currently trying to diagnose tuning
> issues in a two-tuner machine, and work out if the (intermittent)
> problem is happening one or both of the inputs.
> It doesn't matter that the information might become outdated; it'd be
> very useful in the short term.

Well, you can always grep the log once a day (after logrotate runs,
assuming you've got it setup), and store the output to a file:

zcat /var/log/mythtv/oldlogs/mythbackend.log.1.gz | grep  'Started
recording' >> /tmp/recorder_history

This assumes you have lograte set to compress you old logfiles. If
not, then change it from zcat to cat. Also change the path for the old
logfile, and the path of the recorder_history file to wherever you
want to keep it.

If you want to keep it updated during the day, so that you don't have
to wait until the next day to look at it, you can always run this
multiple times per day against the current log file. If you do this,
you will see recordings show up multiple times. To clean up the file,
just run
cat /tmp/recorder_history | sort | uniq > /tmp/recorder_history2; mv
/tmp/recorder_history2 /tmp/recorder_history

If you want a prettier way to view this, you can always change that
mythweb script mike linked to so that it gets the data from this file
instead of directly from the logs. You'll just have to be careful,
because as the size of this file grows you will get more and more data
showing up in mythweb, and that status page will take longer and
longer to load as time goes on. So you may want to change the script
so that it only looks at the last 1000 lines of the file (or whatever
number gives you acceptable performance).

Ron Frazier

More information about the mythtv-users mailing list