[mythtv-users] "Videos" Play too fast and choppy

[Michael T. Dean]

Nowhere wrote:

>mv'ing the .asoundrc file removed the sound altogether.
>
Which means you are not using the ALSA default device--meaning it's 
quite likely a problem with .asoundrc .

>This isn't just a sound problem tho. The video playback is in sync with the sound and
>thus the video playback is too fast also.
>  
>
And, since video is synchronized off of audio, if the sound card takes 
44100Hz input and plays it at 48000Hz (or 32000 at 44100 or 48000 Hz), 
you get chipmonk voices and fast walkers. ;)

>I tried playing some different formats with some interesting results.
>DivX 5.1.1 codec avi's play at the correct speed. MPEG2 encoded from
>nuvexport or from tmpgenc both play too fast. I haven't tried MPEG4 yet
>and will if it is necessary, but I bet this will ring a bell with
>someone.
>  
>
Since each of these files probably is using a different bit-rate for 
audio, this makes perfect sense.  Some work, some don't--depending on 
the settings in .asoundrc and the file's audio stream.

>So the question has now become why does MPEG2 play video and audio to
>fast when using mplayer through mythvideo while avi's play correctly and
>xine also plays all formats correctly?
>  
>
Different programs are probably configured to use different virtual 
devices defined in .asoundrc.  Each works differently (expects different 
input), giving predictable--although confusing--results.

I would almost guarantee that your problem is your .asoundrc based on 
this result.  Check out 
http://www.gossamer-threads.com/perl/mailarc/gforum.cgi?post=119212&t=search_engine#119212 
(my Apr 11, 2004 1:36 am post) and if it doesn't help, I'll be back in a 
week with time to walk you through fixing it (and customizing your 
.asoundrc).

Good luck,
Mike