[mythtv] Funky 720p playback

[Mark Buechler]

Hi

On Fri, Feb 22, 2008 at 7:47 AM, Robert Kulagowski <rkulagow at gmail.com>
wrote:

> Kevin Kuphal wrote:
> > On Feb 20, 2008 12:45 AM, Bill Cizek <cizek at rcn.com
> > <mailto:cizek at rcn.com>> wrote:
> >
> >
> >     A few weeks ago I noticed playback problems on some of ABC's 720p
> >     programs.
> >
> >     The symptoms are jerky playback, out of sync audio, and incorrect
> >     program length
> >     (an hour long program will be displayed as 45 minutes in the OSD).
> >
> >     The frontend log shows a bunch of lines like
> >         'video_output' mean = '22090.37', std. dev. = '7938.94', fps =
> >     '45.27'
> >         'video_output' mean = '22820.35', std. dev. = '8543.71', fps =
> >     '43.82'
> >
> >     Interspersed with dozens of messages:
> >          "NVP: Video is xxx frames ahead of audio."
> >
> >     If I watch the recorded video in mplayer I get the same audio
> >     problem and
> >     constant warnings like this:
> >
> >         Warning! FPS changed 47.952 -> 59.940  (-11.988010) [7]   2%
> >      5.7% 9 0
> >         A:75362.5 V:75362.4 A-V:  0.021 ct:  0.189 1399/1353 45%  2%
> >      5.6% 9 0
> >         demux_mpg: 24000/1001fps progressive NTSC content detected,
> >     switching framerate.
> >         A:75362.5 V:75362.4 A-V:  0.045 ct:  0.191 1401/1354 44%  2%
> >      5.6% 9 0
> >         demux_mpg: 30000/1001fps NTSC content detected, switching
> framerate.
> >         Warning! FPS changed 47.952 -> 59.940  (-11.988010) [7]   2%
> >      5.6% 9 0
> >         A:75362.8 V:75362.8 A-V: -0.004 ct:  0.195 1418/1366 44%  2%
> >      5.4% 9 0
> >         demux_mpg: 24000/1001fps progressive NTSC content detected,
> >     switching framerate.
> >
> >     This started at the end of January using recent SVN. It's on ABC in
> >     Chicago.
> >     The only thing I found on the web is
> >     http://forum.videohelp.com/topic344584.html ,
> >     which implies ABC did something to new program episodes.
>  Unfortunately
> >     my depth of
> >     knowledge on this topic is quite shallow.
> >
> >     My questions:
> >
> >     Has anyone else noticed this?
> >     Is this something that is wrong with the broadcast or should the
> player
> >     be able to handle it?
> >
> >     Just curious.  It's been a long time since I've had any non-trivial
> >     problems in MythTV --
> >     It's been rock solid.
> >
> >
> > I've seen the same thing on ABC HD programming in Chicago for about the
> > past two months.  It only occurs on HD programs, not SD programs in HD
> > (like Supernanny) with letterboxing.  I've tried finding a place to
> > notify them about it but haven't and also haven't put much effort into
> it.
>
> I'm assuming that this happened to everyone again yesterday during Lost?
>  If it did, how are you obtaining the content:  OTA or QAM?
>

Does the issue go away after a pause/unpause?


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- Mark.
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