[mythtv] DB Error (blank frame list insert) and ERROR:file I/O

Bruce Markey bjm at lvcm.com
Wed Mar 26 15:27:53 EST 2003


Chris wrote:
> I am using one pc with two tuners.  Sometimes, i do get only one current
> recording in the Watch a Recording menu and at the same time not be able
> to watch live tv (it claims all tuners are busy even though Watch a
> Recording only shows one currently being recorded show).  Interestingly,
> though, this problem  does not happen all the time.  I can play all the
> shows I record. I cannot seek on about half of them.  

When you notice this again, run "top" and see if there are
two mythbackend processes using significant CPU time. If
this happens on a two tuner machine, both processes would
be trying to write to the same file. Disk writes are in big
clusters of blocks  and the process that writes last would
win so the file might almost be viewable. But if different
parts of the file were written by a different process the
frame alignment, timecodes and frame numbers would be messed
up and playback would certainly be terribly broken.

--  bjm





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