[mythtv-users] Prebuffering Pause on RH9, epia m-10000 and mythtv CVS install

[Jason Corless]

Hi all,

I've searched the mailing list archives, but haven't found anything that 
directly relates to my setup.

The problem is that I am continually getting the "prebuffing pause" 
message on Mythfrontend.  As such, the video and audio are jerky.

My setup is:
- Redhat 9 - stock w/ OSS sound drivers
- latest VIA binary drivers (0032)
- VIA M-10000 Nehmehia
- 512 MB RAM
- PVR-250 capture card

This occurs with the current (as of ~10:30am this morning) CVS of mythtv 
and the IVTV drivers from ~Sept 28th.

I have set the audio to be 48000 in all my recording profiles, and 48000 
in my PVR-250 capture profile.  I am recording at 480x480.

I have enabled CLE-266 hardware decoding -- CPU load is less than 30% 
when playing.

Note that this occurs when playing liveTV and with the playback of 
recorded programs.

DMA is enabled on my harddrive -- I'm getting ~50 MB/sec from hdparm -t 
/dev/hda.  The /mnt/store filesystem is ext2.

Any pointers would be greatly appreciated.

Below is the output from mythfrontend:

2003-10-01 11:39:24 Enabled verbose msgs : important general
connecting to backend server: 127.0.0.1:6543
Input #0, mpeg, from 'rbuf://127.0.0.1:6543/mnt/store//ringbuf1.nuv':
  Stream #0.0: Video: mpegvideo_via, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Opening OSS audio device '/dev/dsp'.
Over/underscanning. V: 0.000000, H: 0.000000, XOff: 0, YOff: 0
Using VIA CLE266 Hardware Decoding
Changing from None to WatchingLiveTV
2003-10-01 11:39:31 prebuffering pause
2003-10-01 11:39:31 prebuffering pause

...snip... repeated every few seconds....

2003-10-01 11:40:18 prebuffering pause
2003-10-01 11:40:21 prebuffering pause
Input #0, mpeg, from '/mnt/store//1005_20031001113000_20031001134500.nuv':
  Stream #0.0: Video: mpeg2video, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Changing from WatchingLiveTV to None
Changing from None to None
2003-10-01 11:41:59 prebuffering pause
2003-10-01 11:42:00 prebuffering pause
2003-10-01 11:42:02 prebuffering pause
Error: File Missing!
Input #0, mpeg, from '/mnt/store//1005_20031001113000_20031001134500.nuv':
  Stream #0.0: Video: mpeg2video, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Input #0, mpeg, from '/mnt/store//1005_20031001113000_20031001134500.nuv':
  Stream #0.0: Video: mpegvideo_via, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Opening OSS audio device '/dev/dsp'.
Over/underscanning. V: 0.000000, H: 0.000000, XOff: 0, YOff: 0
Using VIA CLE266 Hardware Decoding
Changing from None to WatchingRecording
2003-10-01 11:42:08 prebuffering pause
2003-10-01 11:42:08 prebuffering pause
2003-10-01 11:42:09 prebuffering pause

... snip ... repeated every few seconds ...

2003-10-01 11:42:53 prebuffering pause
Input #0, mpeg, from '/mnt/store//1005_20031001113000_20031001134500.nuv':
  Stream #0.0: Video: mpeg2video, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Input #0, mpeg, from '/mnt/store//1005_20031001113000_20031001134500.nuv':
  Stream #0.0: Video: mpeg2video, 480x480, 29.97 fps, 16000 kb/s
  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
Changing from WatchingRecording to None
Changing from None to None