[mythtv-users] reported runtimes are 4-5 minutes short for a single channel

[Seth Daniel]

On Fri, Apr 20, 2007 at 04:18:00PM -0500, Keller Giacomarro wrote:
> On Fri, 2007-04-20 at 14:09 -0700, Seth Daniel wrote:
> > Hello,
> > 
> > Recently, reported runtimes for one channel (CBS received OTA here in the
> > Los Angeles, CA area) have consistently been 4-6 minutes shorter than
> > the time it was set to record for.  So, if I have a rule that recorded
> > CBS for 1 hour the reported runtime would be 54-55 minutes.  The entire
> > show will have been recorded.
> > 
> > I have seen where some people have recommended running 'mythcommflag
> > --rebuild' because they suspect the seek table is inaccurate.  I tried
> > this but the reported runtime remained the same.
> > 
> > This problem happens on all recordings on this one channel.  All other
> > recordings on other channels have correct runtimes.  
> > 
> > I get CBS OTA using an HDHomerun.  Mythtv is compiled and is a very
> > recent SVN version.  HDHomerun firmware is 20070320.
> > 
> > As far as I can tell nothing out of the ordinary is in the mythtv logs.
> > 
> 
> You mentioned that nothing is out of the ordinary in the mythtv logs.
> Do you have any lines similar to this?
> 
> [mpeg2video @ 0xb743e808]invalid mb type in B Frame at 52 43
> [mpeg2video @ 0xb743e808]ac-tex damaged at 52 34
> [mpeg2video @ 0xb7483808]ac-tex damaged at 60 23
> [mpeg2video @ 0xb7483808]00 motion_type at 3 26
> [mpeg2video @ 0xb7483808]00 motion_type at 31 12
> [mpeg2video @ 0xb743e808]00 motion_type at 43 46
> 
> >From what I understand, these are errors in the stream.  In my
> situation, they're accompanied by strange video errors that I can see
> when I play the file back.  Sometimes a few lines are garbled, sometimes
> half the image is gone for a moment.  When I have a stream with many
> errors like this, myth reports the total length as shorter than it
> should be.  It's like it doesn't count the errored section as being part
> of the total time.  I've had Lost episodes that report as 50 minutes or
> so when it gets particularly bad.
> 
> Does this sound like the same problem you're having?  


No, I get really good playback from CBS.  Now NBC occasionally has quite
a few errors, but it (NBC) still shows a runtime of 59:00-1:00:00.

-- 
seth / @sethdaniel.org
When the ax entered the forest, the trees said, "The handle is one of us!"