[mythtv-users] Garbled Closed captions with PVR-350

[Daniel Kristjansson]

On Mon, 2007-10-29 at 07:48 -0400, Jay R. Ashworth wrote:
> On Sun, Oct 28, 2007 at 10:34:26PM -0600, Brian Wood wrote:
> > Only thing I can think of so far is mis-tuning (wrong frequency) or very
> > wacked MPEG parameters, but that should result in bad pictures. That's
> > why I asked if the CC info appeared clean on line 21, but I suppose
> > without a proper waveform monitor I'm asking a little much for real info
> > on that.
> > 
> > I'll keep thinking. I have a feeling I'm overlooking something obvious here.
> 
> My vote for "something obvious" is his note that a different program,
> on the same card on the same programs on the same wire, pulls out
> perfect, ungarbled captions.  I concur with his observation that it
> must be myth, somehow.  I also concur with Mike: I can't see how.  :-)

To add a few data points:

I'm running ivtv 1.0.0 as shipped with 2.6.22.4 with SMP and preempt
enabled. I just swapped out a PVR-500 for a PVR-250 and started
experiencing the garbled captions problem with no other changes.

According to Richard Woelk using a PVR-250 ivtv versions 0.10.1 and
1.0.0 have this problem while version 0.10.0 does not.

On Sept 16th, Hans Verkuil posted to the ivtv-users mailing list
that he needed access to a machine with a PVR-250 or PVR-350 installed
located in the US and with the latest v4l-dvb repo installed in order
to fix this problem.

-- Daniel