[mythtv-users] ATSC Encoder change breaks Mythtv

[Greg Maus]

Taylor,

On Fri, 2010-10-08 at 14:30 -0400, Taylor Ralph wrote:
> Greg,
> 
> On Fri, Oct 8, 2010 at 6:28 AM, Greg Maus <g.maus at fnmmail.com> wrote:
> > On Thu, 2010-10-07 at 21:06 -0400, Taylor Ralph wrote:
> >> On Thu, Oct 7, 2010 at 7:41 PM, Greg Maus <g.maus at fnmmail.com> wrote:
> >> >
> >> >> Have you tried playing back the video files in another player
> >> >> (MPlayer,
> >> >> VLC, etc). What format is the audio stream in (MPlayer will tell
> >> >> you)?
> >> >> What is your audio output configuration? That information will
> >> >> certainly
> >> >> help.
> >> >
> >> > The recorded files that will not play in Myth frontend play fine in all
> >> > of the common media players.  I am not exactly sure what you mean what
> >> > format is the audio stream.  I know that it is AC3, and that is the same
> >> > audio format as files that were recorded prior to the encoder change.
> >> > Is there a command line option in mplayer to get more specific audio
> >> > stream info?
> >> >
> >> > My Mythtv audio config is pretty basic.  ASLA:default.  I have also
> >> > tried ALSA:spdif, but there is no difference in playback regardless of
> >> > the settings.
> >> >
> >>
> >> You need to provide a small sample so a dev can take a look at what's going on.
> >>
> >> Regards.
> >> --
> >> Taylor
> >> _______________________________________________
> >> mythtv-users mailing list
> >> mythtv-users at mythtv.org
> >> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
> > A sample file has been uploaded here:
> > http://filebin.ca/mhvyt/KSTP_5.1sample.mpg
> > Thank you!
> >
> 
> I've analyzed this video and unfortunately the FFmpeg mpegts demuxer
> doesn't provide any valid video timestamps (DTS or PTS). Obviously,
> this makes A-V sync impossible to accomplish. In mplayer the video
> plays fine with perfect A-V sync but by default it doesn't use the
> FFmpeg mpegts demuxer. So it is most likely a valid video format.
> FFmpeg prints the following error when processing the video:
> 
> [mpegts @ 0x93da2c0]invalid dts/pts combination
> 
> The only way to get this resolved is to file a bug report at
> http://ffmpeg.org/bugreports.html and provide the sample which you've
> already created. Then open a ticket at
> http://svn.mythtv.org/trac/newticket and reference the FFmpeg ticket.
> Sorry I don't have better news but the sooner we get this fixed the
> better since I can only imagine other broadcasters will start using
> this new encoder at some point.
> 
> Regards.
> 
> --
> Taylor
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

I have opened tickets:
FFmpeg Issue2286
Mythtv #9076

I mentioned your name as helping me to find the problems in the file.  I
hope this is okay.

Thank you,
Greg