[mythtv] pcHDTV oddity

Fri Sep 17 18:45:47 EDT 2004

On Tuesday 14 September 2004 10:45, Jarod Wilson wrote:
> Doug Larrick wrote:
> > Jarod Wilson wrote:
> >> 2) ABC also has a very strong signal, and worked great several months
> >> back when I last had my card working. I'm not sure if its related, but
> >> this is my only 720p station... It always plays back like its in slow
> >> motion, with stuttering video and audio, both in live TV and
> >> recordings. If I pause the video, then unpause, it seems to play fine
> >> for a sec, then starts crapping out again.
> >
> > Can you post output of
> > 'mythfrontend --verbose playback'?
>
> Not at the moment, but I certainly will once I have an opportunity
> (probably end-of-day). Thanks Doug!

Here's that output, with some annotations:

$ mythfrontend --verbose playback
2004-09-16 19:28:25 mythfrontend version: 0.16.20040906-1 www.mythtv.org
2004-09-16 19:28:25 Enabled verbose msgs : important general playback
2004-09-16 19:28:27 Registering Internal as a media playback plugin.
2004-09-16 19:28:27 Registering MythDVD DVD Media Handler as a media handler
2004-09-16 19:28:27 Registering MythDVD VCD Media Handler as a media handler
2004-09-16 19:28:29 Registering MythMusic Media Handler as a media handler
2004-09-16 19:28:38 Connecting to backend server: 192.168.3.4:6543 (try 1 of 
5)
2004-09-16 19:28:38 Using protocol version 13
2004-09-16 19:28:38 Using protocol version 13
2004-09-16 19:28:38 Using protocol version 13
------------------------------------------------------------------------

Starts out with playback on the CBS channel that occasionally has audio 
issues. With a bit of further investigation, I've found the CBS station 
almost always has the audio issue when it is the first station tuned in any 
given session, but if I change to it from another station, its fine... 

------------------------------------------------------------------------
2004-09-16 19:28:42 detectInterlace(Detect Scan, Detect Scan, 29.97, 1088) 
->Interlaced Scan
2004-09-16 19:28:42 Interlaced: Interlaced Scan  video_height: 1088  fps: 
29.97
2004-09-16 19:28:42 Estimated bitrate = 384000
2004-09-16 19:28:42 Filling position map from 0 to 88
2004-09-16 19:28:42 Position map filled from Encoder to: 74
2004-09-16 19:28:42 SyncPositionMap liveTV, from Encoder: 5 entries
2004-09-16 19:28:42 detectInterlace(Ignore Scan, Interlaced Scan, 29.97, 1088) 
->Interlaced Scan
2004-09-16 19:28:42 Interlaced: Interlaced Scan  video_height: 1088  fps: -1
2004-09-16 19:28:42 Partial position map found
2004-09-16 19:28:42 Opening OSS audio device '/dev/dsp'.
2004-09-16 19:28:42 Audio fragment size: 4096
2004-09-16 19:28:42 Over/underscan. V: 0.02, H: 0.1, XOff: 2, YOff: 0
2004-09-16 19:28:42 Using XV port 146
2004-09-16 19:28:42 Image size. dispxoff 12, dispyoff: 0, dispwoff: 855, 
disphoff: 480
2004-09-16 19:28:42 Image size. imgx 190, imgy: 22, imgw: 1536, imgh: 1037
2004-09-16 19:28:44 Changing from None to WatchingLiveTV
2004-09-16 19:28:44 Using deinterlace method linearblend
pthread_setschedparam: Operation not permitted
2004-09-16 19:28:44 Running as SUID root would allow some threads to run with 
realtime priority, improving video smoothness.
2004-09-16 19:28:44 nVidiaVideoSync: VBlank ioctl did not work, unimplemented 
in this driver?
2004-09-16 19:28:44 DRMVideoSync: Could not open device /dev/dri/card0, 
Permission denied
2004-09-16 19:28:44 RTCVideoSync: Could not set RTC frequency, Permission 
denied.
2004-09-16 19:28:44 Using audio as timebase
2004-09-16 19:28:44 Video timing method: USleep with busy wait
2004-09-16 19:28:44 Refresh rate: 16681, frame interval: 33366
2004-09-16 19:28:44 waiting for prebuffer...
2004-09-16 19:28:44 prebuffer wait timed out..
2004-09-16 19:28:44 waiting for prebuffer...
2004-09-16 19:28:44 A/V diverged by 5.06504 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:44 A/V diverged by 8.72895 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 11.2296 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 12.8578 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 13.8318 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 14.315 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 14.4226 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 14.2561 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 13.8764 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 13.3219 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 12.6813 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 11.9461 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 11.1549 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 10.3067 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 9.4159 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 8.50051 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:45 A/V diverged by 7.55922 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:46 A/V diverged by 6.59848 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:46 A/V diverged by 5.63816 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:46 A/V diverged by 4.66319 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:46 A/V diverged by 3.67722 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:46 positionMap[ 74 ] == 5747536.
2004-09-16 19:28:46 positionMap[ 89 ] == 6898472.
2004-09-16 19:28:47 positionMap[ 104 ] == 8039632.
2004-09-16 19:28:47 positionMap[ 119 ] == 9193952.
2004-09-16 19:28:48 positionMap[ 134 ] == 10367448.
'video_output' mean = '40492.77', std. dev. = '13899.95', fps = '24.70'
avsync_delay: -39, avsync_avg: -39, warpfactor: 0.9, warpfactor_avg: 
0.00504102
2004-09-16 19:28:48 positionMap[ 149 ] == 11431152.
2004-09-16 19:28:49 positionMap[ 164 ] == 12574756.
2004-09-16 19:28:49 positionMap[ 179 ] == 13745996.
2004-09-16 19:28:50 positionMap[ 194 ] == 14891104.
2004-09-16 19:28:50 positionMap[ 209 ] == 16038468.
2004-09-16 19:28:51 positionMap[ 224 ] == 17206888.
2004-09-16 19:28:51 positionMap[ 239 ] == 18421180.
'video_output' mean = '33371.20', std. dev. = '792.30', fps = '29.97'
avsync_delay: -39, avsync_avg: -39, warpfactor: 0.9, warpfactor_avg: 0.0100043
2004-09-16 19:28:52 positionMap[ 254 ] == 19503308.
2004-09-16 19:28:52 positionMap[ 269 ] == 20607808.
2004-09-16 19:28:53 positionMap[ 284 ] == 21748216.
2004-09-16 19:28:53 positionMap[ 299 ] == 22880728.
------------------------------------------------------------------------

Changed channel over to the ABC station. Haven't taken a look at cpu usage 
when its on that channel...

------------------------------------------------------------------------
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 AvFormatDecoder: Video has changed from 1920x1088 to 
1280x720.
2004-09-16 19:28:55 detectInterlace(Detect Scan, Interlaced Scan, 29.97, 720) 
->Progressive Scan
2004-09-16 19:28:55 Interlaced: Progressive Scan  video_height: 720  fps: 
29.97
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 Image size. dispxoff 12, dispyoff: 0, dispwoff: 855, 
disphoff: 480
2004-09-16 19:28:55 Image size. imgx 126, imgy: 14, imgw: 1024, imgh: 691
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:55 prebuffer wait timed out..
2004-09-16 19:28:55 waiting for prebuffer...
2004-09-16 19:28:56 prebuffer wait timed out..
2004-09-16 19:28:56 waiting for prebuffer...
Unknown conversion
2004-09-16 19:28:56 prebuffer wait timed out..
2004-09-16 19:28:56 waiting for prebuffer...
2004-09-16 19:28:56 prebuffer wait timed out..
2004-09-16 19:28:56 waiting for prebuffer...
2004-09-16 19:28:56 positionMap[ 0 ] == 940.
2004-09-16 19:28:56 prebuffer wait timed out..
2004-09-16 19:28:56 waiting for prebuffer...
2004-09-16 19:28:56 A/V diverged by 6.26386 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 positionMap[ 27 ] == 881532.
2004-09-16 19:28:56 A/V diverged by 10.722 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 A/V diverged by 13.6834 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 A/V diverged by 15.5224 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 A/V diverged by 16.527 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 A/V diverged by 16.9058 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:56 A/V diverged by 16.8153 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 16.3803 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 15.6719 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 14.7585 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 13.7063 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 12.5425 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 11.295 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 9.97725 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 8.62929 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 7.24369 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 5.82236 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 4.59902 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 3.80891 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 A/V diverged by 3.00653 frames, extending frame to keep 
audio in sync
2004-09-16 19:28:57 positionMap[ 54 ] == 1761936.
'video_output' mean = '63321.30', std. dev. = '230444.27', fps = '15.79'
avsync_delay: 33, avsync_avg: 28, warpfactor: 0.9, warpfactor_avg: 0.0149401
2004-09-16 19:28:58 positionMap[ 81 ] == 2633128.
2004-09-16 19:28:59 positionMap[ 108 ] == 3549816.
2004-09-16 19:29:00 positionMap[ 135 ] == 4435296.
2004-09-16 19:29:01 positionMap[ 162 ] == 5307240.
'video_output' mean = '33335.80', std. dev. = '468.36', fps = '30.00'
avsync_delay: 23, avsync_avg: 21, warpfactor: 0.9, warpfactor_avg: 0.0198485
2004-09-16 19:29:02 positionMap[ 189 ] == 6173920.
2004-09-16 19:29:03 positionMap[ 216 ] == 7052256.
2004-09-16 19:29:04 positionMap[ 243 ] == 7930592.
2004-09-16 19:29:05 positionMap[ 270 ] == 8799904.
'video_output' mean = '33343.72', std. dev. = '481.74', fps = '29.99'
avsync_delay: 15, avsync_avg: 31, warpfactor: 0.9, warpfactor_avg: 0.0247296
2004-09-16 19:29:06 positionMap[ 297 ] == 9679932.
2004-09-16 19:29:06 positionMap[ 324 ] == 10554320.
2004-09-16 19:29:07 positionMap[ 351 ] == 11423632.
'video_output' mean = '33350.50', std. dev. = '521.64', fps = '29.98'
avsync_delay: 8, avsync_avg: 0, warpfactor: 0.9, warpfactor_avg: 0.0295837
2004-09-16 19:29:08 positionMap[ 378 ] == 12354232.
2004-09-16 19:29:09 positionMap[ 405 ] == 13195156.
2004-09-16 19:29:10 positionMap[ 432 ] == 14046232.
2004-09-16 19:29:11 positionMap[ 459 ] == 14940924.
'video_output' mean = '33344.20', std. dev. = '482.87', fps = '29.99'
avsync_delay: 15, avsync_avg: 18, warpfactor: 0.9, warpfactor_avg: 0.0344109
2004-09-16 19:29:12 positionMap[ 486 ] == 15812304.
2004-09-16 19:29:13 positionMap[ 513 ] == 16696844.
2004-09-16 19:29:14 positionMap[ 540 ] == 17572172.
2004-09-16 19:29:15 positionMap[ 567 ] == 18528528.
'video_output' mean = '33337.29', std. dev. = '1022.28', fps = '30.00'
avsync_delay: 17, avsync_avg: 8, warpfactor: 0.9, warpfactor_avg: 0.0392113
2004-09-16 19:29:15 positionMap[ 594 ] == 19330160.
2004-09-16 19:29:16 positionMap[ 621 ] == 20189320.
2004-09-16 19:29:17 positionMap[ 648 ] == 21065964.
'video_output' mean = '33348.60', std. dev. = '594.24', fps = '29.99'
avsync_delay: 42, avsync_avg: 33, warpfactor: 0.9, warpfactor_avg: 0.0439851
2004-09-16 19:29:18 positionMap[ 675 ] == 21941856.
2004-09-16 19:29:22 waiting for prebuffer...
2004-09-16 19:29:23 prebuffer wait timed out..
2004-09-16 19:29:23 waiting for prebuffer...
2004-09-16 19:29:23 prebuffer wait timed out..
2004-09-16 19:29:23 waiting for prebuffer...
2004-09-16 19:29:23 A/V diverged by 4.19589 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 positionMap[ 675 ] == 21941856.
2004-09-16 19:29:23 A/V diverged by 7.08056 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 8.71956 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 9.69406 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 10.0653 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 9.97659 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 9.54292 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 8.84301 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 7.94348 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:23 A/V diverged by 6.90167 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:24 A/V diverged by 5.73818 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:24 A/V diverged by 4.63331 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:24 A/V diverged by 3.74471 frames, extending frame to keep 
audio in sync
2004-09-16 19:29:24 positionMap[ 702 ] == 22813800.
2004-09-16 19:29:25 positionMap[ 729 ] == 23697400.
2004-09-16 19:29:26 positionMap[ 756 ] == 24601868.
2004-09-16 19:29:26 Changing from WatchingLiveTV to None
2004-09-16 19:29:26 Changing from None to None
------------------------------------------------------------------------------------

And we're done.

That ABC station is the only 720p one in my area, and no other tuner to check 
it with... I should probably try mplayer and/or xine-hd also...

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

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