[mythtv] Unichrome/XvMC VLD output segfault

Sat Nov 20 21:34:54 UTC 2004

I'm running cvs as of Thursday, with the Nov 16 Unichrome package set 
from http://www.kingcot.eclipse.co.uk/unichrome/ on an M10000 running 
Fedora Core 2. The one deviation is that I'm running the 2.6.9-1.3_FC2 
kernel with the DRM module rebuilt against it.

Anyhow, the frontend loads up just fine, no problems browsing my 
recordings library, XvMC VLD decoding is enabled in the setup, etc. 
However, whenever I try to play a recording, I get a segfault. Some 
verbose output below. I'm curious what's going on with the "No XvMC 
found" line... I'm assuming its a problem w/the Unichrome interaction, 
but all the audio stuff doesn't look so good (extra audio buffering is 
enabled, too).

I'm recompiling a freshly updated cvs copy from today with debug 
support enabled, will get a backtrace once the compile finishes. I'm 
also going to try the Nov 5 package set, I've seen positive reports for 
that one, haven't heard anything about the 16th set.

$ mythfrontend -v playback,audio,libav
2004-11-20 04:40:52.583 mythfrontend version: 0.16.20041115-1 
www.mythtv.org
2004-11-20 04:40:52.584 Enabled verbose msgs : important general 
playback audio libav
2004-11-20 04:40:55.282 Registering Internal as a media playback plugin.
Error loading image file: 
/usr/local/share/mythtv/themes/default/NOTHING.png
2004-11-20 04:41:14.859 All Programs
2004-11-20 04:41:20.897 Connecting to backend server: 192.168.3.24:6543 
(try 1 of 5)
2004-11-20 04:41:20.905 Using protocol version 14
2004-11-20 04:41:22.452 Using protocol version 14
2004-11-20 04:41:26.440 AVFD
2004-11-20 04:41:26.440 AVFD: Opening Stream #0: codec id 2
2004-11-20 04:41:26.441 detectInterlace(Detect Scan, Detect Scan, 
29.97, 480) ->Interlaced Scan
2004-11-20 04:41:26.441 Interlaced: Interlaced Scan  video_height: 480  
fps: 29.97
2004-11-20 04:41:26.458 AVFD: Looking for decoder for 4
2004-11-20 04:41:26.459 AVFD
2004-11-20 04:41:26.460 AVFD: Opening Stream #1: codec id 9
2004-11-20 04:41:26.460 AVFD: Looking for decoder for 9
2004-11-20 04:41:26.482 Stream #1 (audio track #1) is an audio stream 
with 2 channels.
2004-11-20 04:41:26.483 Auto-selecting audio track #1 (stream #1).
2004-11-20 04:41:26.483 It has 2 channels and we needed at least 2
2004-11-20 04:41:26.484 Initializing audio parms from stream #0.
2004-11-20 04:41:26.485 Estimated bitrate = 384000
2004-11-20 04:41:27.634 Position map filled from DB to: 14538
2004-11-20 04:41:27.644 SyncPositionMap prerecorded, from DB: 14539 
entries
2004-11-20 04:41:27.644 detectInterlace(Ignore Scan, Interlaced Scan, 
29.97, 480) ->Interlaced Scan
2004-11-20 04:41:27.644 Interlaced: Interlaced Scan  video_height: 480  
fps: -1
Input #0, mpeg, from 
'myth://192.168.3.24:6543/1062_20041101180000_20041101200000.nuv':
   Stream #0.0: Video: mpegvideo_xvmc_vld, 720x480, 29.97 fps
   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
2004-11-20 04:41:27.653 Position map found
2004-11-20 04:41:27.661 Killing AudioOutputDSP
2004-11-20 04:41:27.662 Opening audio device '/dev/dsp'.
2004-11-20 04:41:27.663 Opening OSS audio device '/dev/dsp'.
2004-11-20 04:41:27.670 Audio fragment size: 4096
2004-11-20 04:41:27.672 Ending reconfigure
2004-11-20 04:41:27.672 kickoffOutputAudioLoop: pid = 12873
2004-11-20 04:41:27.685 Over/underscan. V: 0, H: 0, XOff: 0, YOff: 0
No XvMC found
2004-11-20 04:41:30.204 Changing from None to WatchingPreRecorded
2004-11-20 04:41:30.206 OutputAudioLoop: audio paused
2004-11-20 04:41:30.208 nVidiaVideoSync: Could not open device 
/dev/nvidia0, No such file or directory
2004-11-20 04:41:30.208 DRMVideoSync: VBlank ioctl did not work, 
unimplemented in this driver?
2004-11-20 04:41:30.209 Using audio as timebase
2004-11-20 04:41:30.209 Video timing method: RTC
2004-11-20 04:41:30.210 Refresh rate: 33366, frame interval: 33366
2004-11-20 04:41:30.210 waiting for prebuffer...
2004-11-20 04:41:30.207 65536 bytes free on soundcard
2004-11-20 04:41:30.211 Using realtime priority.
2004-11-20 04:41:30.213 61888 bytes free on soundcard
[prior line repeats in similar fashion 10-15x]
2004-11-20 04:41:30.245 2464 bytes free on soundcard
2004-11-20 04:41:30.245 waiting for space on soundcard to write zeros: 
have 2464 need 4096
2004-11-20 04:41:30.249 3232 bytes free on soundcard
2004-11-20 04:41:30.249 waiting for space on soundcard to write zeros: 
have 3232 need 4096
[prior two lines repeat in similar fashion 30-40x]
2004-11-20 04:41:30.341 4512 bytes free on soundcard
2004-11-20 04:41:30.343 800 bytes free on soundcard
2004-11-20 04:41:30.343 waiting for space on soundcard to write zeros: 
have 800 need 4096
2004-11-20 04:41:30.345 prebuffer wait timed out..
2004-11-20 04:41:30.345 waiting for prebuffer...
2004-11-20 04:41:30.347 1568 bytes free on soundcard
2004-11-20 04:41:30.347 waiting for space on soundcard to write zeros: 
have 1568 need 4096
[prior two lines repeat in similar fashion 10-15x]
2004-11-20 04:41:30.391 1824 bytes free on soundcard
2004-11-20 04:41:30.391 waiting for space on soundcard to write zeros: 
have 1824 need 4096
2004-11-20 04:41:30.395 2592 bytes free on soundcard
2004-11-20 04:41:30.395 waiting for space on soundcard to write zeros: 
have 2592 need 4096
2004-11-20 04:41:30.396 _AddSamples bytes=4608, used=1, free=511999, 
timecode=333
2004-11-20 04:41:30.399 3360 bytes free on soundcard
2004-11-20 04:41:30.399 waiting for space on soundcard to write zeros: 
have 3360 need 4096
2004-11-20 04:41:30.403 4128 bytes free on soundcard
2004-11-20 04:41:30.405 416 bytes free on soundcard
2004-11-20 04:41:30.405 waiting for space on soundcard to write zeros: 
have 416 need 4096
Segmentation fault

-- 
Jarod C. Wilson, RHCE
jcw at wilsonet.com

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