[mythtv-users] Anyone else? - Reproducible frontend crash playing HD MPEG2

[Phil Bridges]

On Dec 18, 2007 9:45 AM, Mike LaPlante <mike at dividia.net> wrote:
>
> Rich West wrote:
> > William Price wrote:
> >
> >> Hello.  I'm new to the list and I'm looking for other users who share my
> >> problem.  My frontend will segfault on certain files, always at the same
> >> location.  It has happened so far on two different HD recordings from
> >> two different channels and is 100% reproducible.  I've tested this on
> >> two different frontend boxes, both running 64-bit Fedora 7.  Aside from
> >> this, Myth has been rather stable.
> >>
> >> Any help or redirection is appreciated; what follows is the tail of my
> >> console error out:
> >>
> >> [mpeg2video @ 0x2aaaac4a6040]invalid mb type in P Frame at 3 39
> >> [mpeg2video @ 0x2aaaac4a6040]invalid mb type in P Frame at 29 40
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 63 39
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 19 41
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 28 40
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 56 40
> >> [mpeg2video @ 0x2aaaac4a6040]mb incr damaged
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 60 41
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 3 42
> >> [mpeg2video @ 0x2aaaac4a6040]mb incr damaged
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 62 42
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 35 43
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 7 44
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 60 43
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 50 44
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 42 44
> >> [mpeg2video @ 0x2aaaac4a6040]ac-tex damaged at 77 44
> >> [mpeg2video @ 0x2aaaac4a6040]end mismatch left=55 81AC
> >> [mpeg2video @ 0x2aaaac4a6040]Warning MVs not available
> >> [mpeg2video @ 0x2aaaac4a6040]end mismatch left=54 8196
> >> [mpeg2video @ 0x2aaaac4a6040]Warning MVs not available
> >> [mpeg2video @ 0x2aaaac4a6040]end mismatch left=55 81AC
> >> [mpeg2video @ 0x2aaaac4a6040]Warning MVs not available
> >> [mpeg2video @ 0x2aaaac4a6040]end mismatch left=54 8196
> >> Segmentation fault
> >>
> >
> > I get these errors on my backend system when playing HD recordings that
> > were captured via an OTA antenna.  The recordings play fine (most
> > times), but the errors usually correspond to dropped signal/bad data in
> > the captured video.  I haven't had a frontend crash because of this,
> > though...
> >
> > -Rich
> >
> I've gotten these errors as well. I get them on HD recordings via
> firewire. It has only caused a segfault once on an episode of  Conan O
> Brian. Most of the time it just skips several seconds of playback. (bad
> guy pointing gun at good guy.... skip.... bad guy on the ground dieing,
> damn it! what just happened).
>
> Rich's news is disturbing, I plan to go OTA soon and a I was hoping
> these things were firewire related. Anyways, the one time I had it
> segfault was months ago and upgraded SVN trunk several times since then.
> Its possible some update made the frontend handle these better.
>
> Mike

If it makes y'all feel any better, I get these errors recording QAM
over cable, too.