[mythtv-users] troubleshooting sound issues...

[Nasa]

hi,

I am getting some stuttering with some of my video files...  error messages looks like so:

2010-03-07 20:51:23.827 TV: Attempting to change from None to Watching Video
2010-03-07 20:51:23.974 pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!pmt_cb() got a TS packet that doesn't have PMT TID!Tuning to pnum: 0x0 without CRC check on PMT
2010-03-07 20:51:24.449 AFD: Opened codec 0xfe6b380, id(H264) type(Video)
2010-03-07 20:51:24.449 AFD: codec AC3 has 2 channels
2010-03-07 20:51:24.449 AFD: Opened codec 0xe9b7ed0, id(AC3) type(Audio)
2010-03-07 20:51:24.455 Opening audio device 'spdif'. ch 2(2) sr 48000 (reenc 1)
2010-03-07 20:51:24.455 Opening ALSA audio device 'iec958:{ AES0 0x02 }'.
2010-03-07 20:51:24.465 Opening audio device 'spdif'. ch 2(2) sr 48000 (reenc 1)
2010-03-07 20:51:24.466 Opening ALSA audio device 'iec958:{ AES0 0x02 }'.
2010-03-07 20:51:24.475 Opening audio device 'spdif'. ch 2(2) sr 48000 (reenc 1)
2010-03-07 20:51:24.475 Opening ALSA audio device 'iec958:{ AES0 0x02 }'.
2010-03-07 20:51:24.518 VideoOutputXv: Desired video renderer '' not available.
                        codec 'H.264' makes 'xv-blit,xshm,xlib,' available, using 'xv-blit' instead.
2010-03-07 20:51:24.519 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video Texture'
2010-03-07 20:51:24.644 OSD Theme Dimensions W: 1280 H: 720
2010-03-07 20:51:24.751 TV: Changing from None to Watching Video
2010-03-07 20:51:24.757 New DB connection, total: 3
2010-03-07 20:51:24.758 Connected to database 'mythconverg' at host: localhost
2010-03-07 20:51:24.758 The realtime priority setting is not enabled.
2010-03-07 20:51:24.759 Couldn't load deinterlace filter 
2010-03-07 20:51:24.760 Video timing method: USleep with busy wait
2010-03-07 20:51:33.289 WriteAudio: buffer underrun
2010-03-07 20:51:33.554 WriteAudio: buffer underrun
2010-03-07 20:51:33.592 NVP(5): prebuffering pause
2010-03-07 20:51:38.037 NVP(5): prebuffering pause
2010-03-07 20:51:43.650 TV: Attempting to change from Watching Video to None

as noted in the log, i am using spdif with passthrough to my stereo system.  given that most of the 
suggestions from the wiki don't seem to make sense.

videocard:  Identification
Vendor: ‎nVidia Corporation
Description: ‎G98 [GeForce 8400 GS]
Media class: ‎VGA compatible controller
Connection
Bus: ‎PCI Express
PCI domain: ‎0
Bus PCI #: ‎7
PCI device #: ‎0
PCI function #: ‎0
PCI revision: ‎0xa1
Vendor ID: ‎0x10de
Device ID: ‎0x06e4
Sub vendor ID: ‎0x10de
Sub device ID: ‎0x05cc

soundcard, from motherboard:
Vendor: ‎nVidia Corporation
Description: ‎MCP55 High Definition Audio
Media class: ‎Audio device
Connection
Bus: ‎PCI
PCI domain: ‎0
Bus PCI #: ‎0
PCI device #: ‎6
PCI function #: ‎1
PCI revision: ‎0xa2
Vendor ID: ‎0x10de
Device ID: ‎0x0371
Sub vendor ID: ‎0x1462
Sub device ID: ‎0x7250
Driver
Module: ‎snd_hda_intel


thanks,

nasa