[mythtv-users] Recordings playback flashes scenes slightly forward/backward

Michael Knoll michael.knoll at gmail.com
Fri Oct 13 13:57:14 UTC 2006


I tried the latency settings, that didn't have an effect.  I looked at
recordings that had commercial flagging going at the same time, and
records that weren't commercial flagging at the same time and didn't
notice a difference in frequency.  I also switched commercial flagging
down to low priority.  I record at 2500kb/s, which I think is rather
low, so I'd imagine disk bandwidth isn't an issue as the PCI Latency
page on the wiki suggests.

I'm going to try a capture without Myth tonight, just cat /dev/video1
>mpeg.  If that gets the jumping error I'll contact the IVTV group.

Thanks,
Mike

On 10/12/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
> On Oct 11, 2006, at 6:32 PM, Michael Knoll wrote:
>
> > I recently upgraded to 0.20 on my Gentoo machine with IVTV 0.7.0 on a
> > PVR350. I am using a GeForce 4 through DVI to playback.  As I am
> > watching a recording, it will flash in random locations in the video,
> > but always in the same spot.  I paused and rewound frame by frame, the
> > flashes are frames from the same recording a little ahead or behind of
> > the actual timeline.
> >
> > Does anyone know what causes this and/or how to fix it?  I can supply
> > more information, I'm just not sure what's relevant right now.
> >
> > Thanks,
> > Mike
>
> I had the same exact problem on my system with a PVR-350. It seemed
> to crop up when I added my HD-5500 card but I was going through a lot
> of changes at the time (updated kernel, ivtv and probably other
> things I'm forgetting). Eventually it went away. I'm not sure what
> fixed it since I keep as up to date as possible with ivtv and my
> kernel. I've also gone from an AMD64 3200+ to a dual core AMD64 4400+
> right around the time of my .20 upgrade. I can definitely say it's
> not your video card since it's in the recording itself and not your
> distro - I am using FC4. I'm at ivtv 0.7.1 and 2.6.17-1.2142_FC4smp.
>
> Someone suggested changing my PCI latency settings, but it didn't
> seem possible to change on my motherboard (my system took the
> commands but nothing ever changed from what I could tell). Maybe give
> that a shot? Wish I could be of more help.
>
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