[mythtv-users] On Suse9: playback has instant slowdown and audio jitter

[steve.myth at hiblue.com]

Before i start, let me just say ' I think i've tried everything.'
Really. I've spent 2 weeks on this problem and rebuilt every thing from QT to 
Nvidia drivers. And still....

...I cant play back videos via mythvideo. The  playback slows down as soon as 
I play it. After 5 seconds the audio becomes choppy. When I say 'slows down' 
I really mean s-l-o-w-i-n-g d-o-w-n audio and video. (divx5 with mp3 and AC3 
soundtracks alike - have not tried other formats now I come to think of it.)

Note i cant test mythTV TV playback at the moment as my TV card broke. Just 
using Mythvideo as a playback device right now.

I have Suse 9.0 on a Shuttle SS51 with Geforece4 ti4200, 4363 drivers (i've 
tried default and latest too), onboard sound and modified QT3 as built by 
'~oeysteio' (Thanks - your packages saved me a lot of hassle re-building QT3)
Xine works fine and xmms works well via oss and alsa. ARTS is turned off.

I've now added a soundblaster live (some others noted a difference after 
disgarding on-board sound) and it made no difference.

I've search the forums up and don but cant find anyone with the same problem. 

--verbose playback  gives this. (note the regular 19.99 fps which to me sounds 
like something is deliberately slowing down to 20 fps.) CPU util is 10%.

2004-03-26 00:15:35 Registering Internal as a media playback plugin.
2004-03-26 00:15:35 Registering MythMusic Media Handler as a media handler
2004-03-26 00:15:49 Estimated bitrate = 128000
Input #0, avi, from '/home/steve/mnt/Video/TV/Horizon on Thu, Mar 11 2004 
recomp.avi':
  Stream #0.0: Video: mpeg4, 448x336, 25.00 fps
  Stream #0.1: Audio: mp3, 44100 Hz, stereo, 128 kb/s
2004-03-26 00:15:50 Opening OSS audio device '/dev/dsp1'.
2004-03-26 00:15:50 Over/underscan. V: 0, H: 0, XOff: 0, YOff: 0
2004-03-26 00:15:50 Using XV port 105
2004-03-26 00:15:50 Changing from None to WatchingPreRecorded
2004-03-26 00:15:50 Video timing method: nVidia polling
2004-03-26 00:15:50 Refresh rate: 16665, frame interval: 40000
2004-03-26 00:15:50 waiting for prebuffer...
[mpeg4 @ 0x82c4e78]frame skip 8
'video_output' mean = '50021.37', std. dev. = '71.00', fps = '19.99'
avsync_avg: -284, warpfactor: 0.938301, warpfactor_avg: 0.9412
'video_output' mean = '50028.62', std. dev. = '97.35', fps = '19.99'
avsync_avg: -929, warpfactor: 0.9, warpfactor_avg: 0.94103
'video_output' mean = '50029.54', std. dev. = '61.38', fps = '19.99'
avsync_avg: -1218, warpfactor: 0.9, warpfactor_avg: 0.940756
'video_output' mean = '50029.57', std. dev. = '126.27', fps = '19.99'
avsync_avg: -1194, warpfactor: 0.9, warpfactor_avg: 0.940486
'video_output' mean = '50029.36', std. dev. = '171.63', fps = '19.99'


Has anyone got any ideas where I should look next? Am I being totally stupid - 
is there a config file which might say 'local fps - 20' or similar?

Any pointers gratefuly received.

Steve.