[mythtv-users] Frontend hangs on playing recordings from a channel

Michael T. Dean mtdean at thirdcontact.com
Tue Sep 7 20:40:09 UTC 2010

  On 09/07/2010 04:10 PM, Thomas Aeby wrote:
> (mythtv 0.21)
> since a few weeks I have an issue with one channel ("Das Erste" via
> DVB-S): Recordings are made, but whenever I try playing them via
> mythfrontend, the frontend just hangs. If I wait in the recordings list
> until the preview is to start playing, the frontend hangs too. Also, in
> mythweb, the preview still image is missing. When trying to re-build
> recordedseek on those recordings, mythtranscode reads the entire mpg
> appareantly without finding positions. Live TV does not work, either.
> The frontend reports "NVP: Prebuffer wait timed out 10 times" when trying
> to play the recordings, however none of the issues listed in the respecting
> wiki page seem to apply.
> The problem appears on all the frontend computers running here (from minimyth
> to ubuntu+mythtv). The backend runs Mythtv 0.21 on Debian Etch.
> Unfortunately, since the setup is rather large (backend server with a number
> of frontends), I cannot quickly try out newer mythtv versions since unfortunately
> I'd have to upgrade all of them in parallel.
> The format of the mpeg stream might have changed recently, however, the
> MPEGS are playing fine when using xine, mplayer and any other player I
> tried out (including projectX I use for cutting recordings).
> Have you got any hint for me?

My best guess is that the problem is the ancient version of the ffmpeg 
libraries used by the ancient version of MythTV.  (Remember that the 
ffmpeg libs used in 0.21 came from /before/ the 0.21 release, so 
although 0.21-fixes was updated up until 0.22 was released about 10 
months ago, you're using ffmpeg libs from ~3 years ago--it looks like 
from somewhere around November 2007.)

I think if you want to play this modern video, you may need modern 
MythTV.  :)

On the bright side, using Mythbuntu ( http://www.mythbuntu.org/ ), you 
could roll out an all-new version to all your systems rather 
quickly--and, being Debian-based, it should be rather familiar.


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