[mythtv-commits] Ticket #9419: Alsa buffer under run

Sat Jan 1 19:25:13 UTC 2011

#9419: Alsa buffer under run
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 Reporter:  bernhart2002@…          |          Owner:  jyavenard
     Type:  Bug Report              |         Status:  infoneeded_new
 Priority:  minor                   |      Milestone:
Component:  MythTV - Audio Output   |        Version:  0.24-fixes
 Severity:  medium                  |     Resolution:
 Keywords:                          |  Ticket locked:  0
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Comment (by bernhart2002@…):

 here is output from mythfront -v audio

  2011-01-01 14:13:19.855 TV: Attempting to change from None to
 WatchingVideo

  2011-01-01 14:13:19.967 Pulse: Operation: success 1 remaining 1

  2011-01-01 14:13:19.988 Pulse: Operation: success 1 remaining 0

  2011-01-01 14:13:19.998 Pulse: PulseAudio suspend OK

  2011-01-01 14:13:20.001 AO: Sample rate 44100 is supported

  2011-01-01 14:13:20.001 AO: Sample rate 48000 is supported

  2011-01-01 14:13:20.001 AO: Sample rate 96000 is supported

  2011-01-01 14:13:20.001 AO: 2 channel(s) are supported

  2011-01-01 14:13:20.012 AO: AC3 or DTS capable

  2011-01-01 14:13:20.012 AO: 6 channel(s) are supported

  2011-01-01 14:13:20.013 AO: Killing AudioOutputDSP

  2011-01-01 14:13:20.147 VDPAU: Version 1

  2011-01-01 14:13:20.147 VDPAU: Information NVIDIA VDPAU Driver Shared
 Library  195.36.24  Thu Apr 22  19:52:55 PDT 2010

  2011-01-01 14:13:20.147 AFD Warning: ScanATSCCaptionStreams() called with
 no PMT

  2011-01-01 14:13:20.147 AFD: Opened codec 0x432b2b0, id(MPEG4)
 type(Video)

  2011-01-01 14:13:20.147 AFD: codec AAC has 2 channels

  2011-01-01 14:13:20.148 AFD: Opened codec 0x4329b00, id(AAC) type(Audio)

  2011-01-01 14:13:20.148 AFD: Audio Track #1 is A/V stream #1 and has 2
 channels in the English
 language(6647399).

  2011-01-01 14:13:20.148 AFD: Selected track 1: English AAC 2ch (A/V
 Stream #1)

  2011-01-01 14:13:20.149 AFD: Initializing audio parms from audio track #1

  2011-01-01 14:13:20.149 AFD: Audio format changed
                         from id(NONE)     -1Hz -1ch -1bps     to id( AAC)
 48000Hz  2ch 16bps

  2011-01-01 14:13:20.149 AO: Killing AudioOutputDSP

  2011-01-01 14:13:20.268 Pulse: Operation: success 1 remaining 1

  2011-01-01 14:13:20.288 Pulse: Operation: success 1 remaining 0

  2011-01-01 14:13:20.299 Pulse: PulseAudio resume OK

  2011-01-01 14:13:20.368 Pulse: Operation: success 1 remaining 1

  2011-01-01 14:13:20.389 Pulse: Operation: success 1 remaining 0

  2011-01-01 14:13:20.399 Pulse: PulseAudio suspend OK

  2011-01-01 14:13:20.401 AO: Sample rate 44100 is supported

  2011-01-01 14:13:20.401 AO: Sample rate 48000 is supported

  2011-01-01 14:13:20.401 AO: Sample rate 96000 is supported

  2011-01-01 14:13:20.401 AO: 2 channel(s) are supported

  2011-01-01 14:13:20.413 AO: AC3 or DTS capable

  2011-01-01 14:13:20.413 AO: 6 channel(s) are supported

  2011-01-01 14:13:20.413 AO: Killing AudioOutputDSP

  2011-01-01 14:13:20.413 AO: Original codec was AAC, signed 16 bit, 48
 kHz, 2 channels

  2011-01-01 14:13:20.413 AO: enc(0), passthru(0), canAC3(1), canDTS(1),
 canLPCM(0),
 configured_channels(2), 2 channels supported(1)

  2011-01-01 14:13:20.413 AO: Opening audio device
 'iec958:CARD=NVidia,DEV=0' ch 2(2) sr 48000 sf signed
 16 bit reenc 0

  2011-01-01 14:13:20.414 ALSA: SetParameters(format=2, channels=2,
 rate=48000, buffer_time=200000,
 period_time=50000)

  2011-01-01 14:13:20.414 ALSA: Buffer time = 200000 us

  2011-01-01 14:13:20.414 ALSA: Period time = 50000 us

  2011-01-01 14:13:20.442 ALSA: Buffer size = 9600 | Period size = 2400

  2011-01-01 14:13:20.462 AO: Audio fragment size: 4800

  2011-01-01 14:13:20.462 AO: Audio Stretch Factor: 1

  2011-01-01 14:13:20.462 AO: Ending Reconfigure()

  2011-01-01 14:13:20.462 AudioPlayer: Enabling Audio

  2011-01-01 14:13:20.463 AO: Reconfigure(): No change -> exiting

  2011-01-01 14:13:20.463 AO: kickoffOutputAudioLoop: pid = 23717

  2011-01-01 14:13:20.463 AO: OutputAudioLoop: Play Event

  2011-01-01 14:13:20.537 VDPAU: Created 2 output surfaces.

  2011-01-01 14:13:20.537 VDPAU: Created VDPAU render device 1280x720

  2011-01-01 14:13:20.565 AFD: No DTS Seeking Hack!

  2011-01-01 14:13:20.575 AO: OutputAudioLoop: Play Event

  2011-01-01 14:13:20.619 Player(0): Video timing method: USleep with busy
 wait

  2011-01-01 14:13:20.619 TV: Changing from None to WatchingVideo

  2011-01-01 14:13:20.626 AO: OutputAudioLoop: Play Event

  2011-01-01 14:13:20.627 VDPAU: Added 2 output surfaces (total 4, max 4)

  2011-01-01 14:13:21.671 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:23.228 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:24.676 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:26.227 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:27.676 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:29.229 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:30.676 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:32.228 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:33.676 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:35.219 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:36.676 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:38.228 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:39.677 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:41.228 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:42.669 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:44.227 ALSA, Error: WriteAudio: buffer underrun

  2011-01-01 14:13:44.974 AO: Pause 1

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Ticket URL: <http://code.mythtv.org/trac/ticket/9419#comment:2>
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