[mythtv-users] Transcode or Nuvexport issue from mpg (mpeg) to avi

[Peter Schachte]

On Fri, Apr 28, 2006 at 08:54:41AM -0700, Chris Petersen wrote:
> As far as I can tell, there is something weird about certain kinds of 
> streams when they get converted to the raw format used by 
> mythtranscode's fifo's.  Encodes that work fine on the raw files fail 
> when you run them through mythtranscode, which is necessary in order to 
> deal with cutlists, and because it's far more robust at dealing with 
> messed up frames than any of the encoders are.

I've also been having problems with nuvexporting some DVB-T
recordings, and I wonder if my problem is related to this one,
although the symptoms are different.

For most of my DVB-T recordings, nuvexport works brilliantly.  But for
a few recordings with bad enough interference to cause audio pops or
squawks, the exported avi loses sync pretty badly after the audio
problem, for the rest of the recording.  I can play the original mpeg
recording under myth without losing sync.

I've also noticed that on a few avi files produced by nuvexport, when
I play them (using myth's internal video player), the program duration
reported by myth is much shorter than the actual program duration.  I
can skip forward up until I get to the reported duration; after that
the program will still play fine, but I can't skip forward anymore.
Using mythcommflag --video on the program fixes this permanently, so
it's not a big deal.  I haven't worked out what's special about some
recordings that makes this happen.

I'm running nuvexport version 0.3 0.20060315.svn, and the 0.19-fixes
branch of mythtv as of 2006-04-29 (sorry, I don't know the svn magic
to get the revision number) on an x86_64 under Debian sid.

-- 
Peter Schachte              The most unpardonable sin in society is
schachte at cs.mu.OZ.AU        independence of thought.
www.cs.mu.oz.au/~schachte/      -- Emma Goldman 
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