[mythtv-users] Problem with VDPAU after broadcaster changes it encoder

[David Wong]

----- "Mark Kendall" <mark.kendall at gmail.com> wrote:
> 2009/6/1 David Wong <david.wong at marvel.com.hk>:
> > Dear Jean-Yves and MythTV-users list,
> >
> > I have problem to decode a HD H.264 stream via VDPAU after the TV
> > broadcaster changes its encoder.
> > The problem exists on both latest svn development trunk and 0.21
> stable
> > branch.
> > The screen would either corrupted or eventually endlessly looped
> within a
> > few frames(with some incorrect slice/macro block).
> > Soft reboot on linux doesn't help and it is still locked in that few
> frames.
> >
> > I am running Nvidia driver 180.51 on 9400 IGP
> >
> > latest svn snapshot (may 31, 2009) of mplayer plays it, but in slow
> motion.
> >
> > a capture of full mux of TS is uploaded at:
> > http://www.sendspace.com/file/wzmajh
> > Only the HD program is problematic, the other two SD channels are
> fine.
> 
> David
> 
> I've pulled out the 3 channels from that file and I get different
> results:-
> 
> HDJade (1080i/h264) - plays fine in Mythtv with both vdpau and
> software decoding. mplayer has problems though.
> j2 (576i/h264) - some corruption in mythtv with both vdpau and
> software decoding. same in mplayer.
> inews (576i/h264) - some corruption in mythtv with both vdpau and
> software decoding and some serious av sync problems. same video
> problems in mplayer though it handles the av sync better.
> 
> This is all tested with latest svn of both mplayer and mythtv with
> the
> 180.51 driver and a 9500GT. There may be some issues around how I
> demuxed the stream (I used vlc) but that shouldn't really impact the
> results.
> 
> So in summary, I think you've got issues with the standard definition
> encoding - mplayer complains about too many reference frames and
> discards some, which is consistent with the corruption I'm seeing and
> vlc complains about mbaff + spatial direct mode not being supported
> (but vlc seems to play back the standard def streams quite well, seg
> faults on the hd though).
> 
> regards
> 
> Mark
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Thanks Mark for your testing.
It is interesting that you have different result.

In my environment the two SD channels are all fine.

David