[vdr] image/sound stutter when watching live, but not in the processed recording

Reinhard Nissl rnissl at gmx.de
Sun Oct 9 22:44:43 CEST 2005


Borghart Steffen wrote:

> I am using vdr with the xine output plugin. When I tune to a certain
> channel the image stutters slightly, and the sound is off for more than
> half of the time. I thought this is the result of a bad signal, but the
> femon Plugin showed similar signal strength/ snr for all channels.
> Now i discovered the following: The divx file vdrconvert produces from
> recordings from that channel is as bad as watching that channel life;
> but the mpg file that vdrconvert uses temporarily in a certain encoding step
> is absolutely fluent without any stutter in image or sound!
> I have no clue why the quality is so bad when watching the channel
> life, because i guess the received data is o.k. My System is powerful
> enough, the load is not more than 60% when using vdr. What is going on
> there?

What happens if you replay such a recording within VDR?

Please enable the PTS logger in vdr-xine: edit xineDevice.c, locate 
cXineDevice::PlayCommon3() and comment out (//) the first "if (0)" in 
that function.
Then send me a few lines of that output on console after "soft start 
phase", i. e. about 15 seconds after switching to that channel.

Dipl.-Inform. (FH) Reinhard Nissl
mailto:rnissl at gmx.de

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