[mythtv-users] Slow/choppy playback problem (not the usual ones, either!)

Michael T. Dean mtdean at thirdcontact.com
Sat Oct 16 03:31:06 UTC 2004

On 10/15/2004 08:32 PM, Joshua M. Thompson wrote:

>Ok as expected switching to AGP did not help. Now the X CPU usage
>between mplayer and mythtv is now even greater; "mplayer /dev/video0"
>eats up 6.6% CPU (down from 30%) and "mythtv" eats 60% (down from 70%).
>Here is another datapoint: I take an XviD file stored on my NFS server
>and play it with mplayer. It plays great. I then play it with mythtv and
>get the same stuttering audio and video. The output from mythtv is about
>the same as watching live TV except it doesn't connect to the backend
>2004-10-15 20:24:41 Opening OSS audio device '/dev/dsp'.
>2004-10-15 20:24:41 Audio fragment size: 4096
>2004-10-15 20:24:41 Using XV port 105
>2004-10-15 20:24:41 Changing from None to WatchingPreRecorded
>2004-10-15 20:24:42 prebuffering pause
>2004-10-15 20:24:42 prebuffering pause
>2004-10-15 20:24:43 prebuffering pause
>2004-10-15 20:24:43 prebuffering pause
>I'd say this at least rules out the backend. The problem is in the
>frontend player somewhere. Not sure where to go from here; is there some
>option I can flip or something I can change and recompile?
>Oh and since my mplayer config file by default uses ALSA directly I
>tried the same experiments with "mplayer -ao oss" and got the same
>results, so I don't think it's the sound drivers.
I still think it's the audio configuration.  (I can be a bit stubborn 
that way--ask anyone on the list. :)  If you don't mind humoring me, 
please provide your sound card type, ALSA version, .asoundrc file, and 
sound-related lines from /etc/modprobe.conf.


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