[mythtv] [mythtv-commits] Ticket #1356: DTVRecorder::FindKeyframes in 0.19 causes video gltiches in firewire recordings

Steven Adeff adeffs.mythtv at gmail.com
Thu Feb 23 03:32:45 UTC 2006


On 2/22/06, Mark Buechler <mark.buechler at gmail.com> wrote:
> On 2/22/06, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> >
> > On 2/21/06, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> > > On 2/21/06, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> > > > On 2/20/06, MythTV <mythtv at cvs.mythtv.org> wrote:
> > > > > #1356: DTVRecorder::FindKeyframes in 0.19 causes video gltiches in
> firewire
> > > > > recordings
> > > > >
> -----------------------+----------------------------------------------------
> > > > >  Reporter:  anonymous  |       Owner:  ijr
> > > > >      Type:  defect     |      Status:  new
> > > > >  Priority:  minor      |   Milestone:
> > > > > Component:  mythtv     |     Version:  0.19
> > > > >  Severity:  high       |
> > > > >
> -----------------------+----------------------------------------------------
> > > > >  In 0.18.1, DCT6200 firewire recordings work fine. In 0.19, a video
> glitch
> > > > >  occurs every few seconds. I replaced the DTVRecorder::FindKeyframes
> in
> > > > >  0.19 with the code in 0.18.1 modified to work with the changed
> signature.
> > > > >  The video glitches went away. DVB recordings work fine in both
> 0.18.1 and
> > > > >  0.19.
> > > >
> > > > did you notice the glitches when using test-mpeg2? I have a similar
> > > > issue where my glitch rate within MythTV SVN is much higher than with
> > > > test-mpeg2, I'm going to give your patch a go against 0.19 and let you
> > > > know how it works out for me. Thanks for looking into this!
> > >
> > > well, so far so good, about 1hr of tv and I haven't noticed a glitch
> > > at all so far, which is great. I'll let you know if I notice any or
> > > see any other oddities that were not there prior to the patch.
> >
> > after even more testing I've found that this completely solves the
> > glitch problem I've been having running SVN up to 0.19. I've yet to
> > notice a the glitches I was getting quite often before.
> >
> Can you describe the glitch? I have been seeing glitches with 720p DVB
> recordings where every few tens of seconds video falls behind audio and
> suddenly catches up.
>
> - Mark.

no this is missing data that shows up as blockiness and lost frames.
Its glitches in the datastream. Your issue is something else, which I
haven't seen.

--
Steve


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