[mythtv] FFmpeg sync

Mark Buechler mark.buechler at gmail.com
Fri Sep 19 13:27:44 UTC 2008


On Fri, Sep 19, 2008 at 12:33 AM, John P Poet <jppoet at gmail.com> wrote:

> On Thu, Sep 18, 2008 at 1:35 PM, Erik Hovland <erik at hovland.org> wrote:
> > On Wed, Sep 17, 2008 at 06:51:39PM -0600, John P Poet wrote:
> >> > I have not tried 1080i H.264.  I have been avoiding it because of all
> >> > the segfaults.  I will try to remember to give that a shot tonight
> >> > with the new code, to see if it is improved.
> >>
> >> Even with this patch applied, trying to watch 1080i HD-PVR generated
> >> h.264 material causes mythfrontend to crash, right after:
> >>
> >> 2008-09-17 18:46:35.049 [h264 @ 0xb7375180]Cannot parallelize
> >> deblocking type 1, decoding such frames in sequential order
> >
> > I have a few patches that attempt to fix defects in h264.c in ffmpeg
> > trunk. I have no idea if they will help the problem you keep running
> > into, but they are attached to this email if you want to give them a
> > try.
> Thanks Erik.  Your patches *may* make it more stable, but I am still
> getting crashes.  They do seem to be less frequent, though.
> If I have time this weekend, I will try to come up with some back traces.
> John

John, I have the feeling your segfaults are during the deblocking phase.
Have you tried applying the skiploop patch? Though that wouldn't obviously
be the fix, it may get you past your issue.

- Mark.
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