[mythtv] LiveTV Shuttering & Squeaky Audio

[Paul McEnery]

> > I ran this message for the last couple of days on the mythtv-users
> > list, but think it goes a little beyond the scope of normal usage and troubleshooting.
> >
> > I am running mythtv-trunk r12637 (not particularly relevant) with a DVB-C
> > card (TT C2300).
> > I am able to successfully lock onto all channels found during a scan, and 95% of
> > the channels play back correctly (livetv & recordings). About a dozen channels
> > (out of about 150) are shuttering and the audio is squeaky.
>
>
> I ran the following tests last night:
>
> I recorded a channel with squeaky audio for a couple of minutes, and
> then tried playing it back. The mythtv playback still contained
> squeaky audio. I then tried playing the recording back with mplayer.
> The audio sounded normal and playback was as you would expect.
>
> A snippet of log output from mplayer for the respective "working" and
> "broken" channels appears below. The key difference that I can see is
> that channels that work have an audio stream of 192.0 kbit/12.50%
> (ratio: 24000->192000). Channels that dont work in MythTV (playback
> AND livetv) have 128.0 kbit/8.33% (ratio: 16000->192000).
>
> Am I missing some codec in the compilation of MythTV, or is there a
> setting to compensate?



Just found this doc:

http://www.cuymedia.net/doxygen-dev-docs/html/index.html

This would seem to indicate that the problem I am experiencing could
be a bug in my ffmpeg libraries. I will checkout the latest trunk and
then recompile mythtv.

It would be nice if someone could confirm that I am heading in the
right direction...