[mythtv-users] Audio issues with .21 - very quiet washed out sound

Sun Mar 9 02:00:31 UTC 2008

On Sat, Mar 8, 2008 at 8:58 PM, Matt S. <skd5aner at gmail.com> wrote:
> I upgraded tonight to SVN Head, made sure all the changes in .21-fixes
>  were applied.  Was running SVN ~15100 with no problems playing back
>  these videos.  Now I'm having some weird sound problems.
>
>  On some videos in my mythvideo library, the sound is very very quiet
>  and washed out.
>
>  Here's some lines from mythfrontend -v audio:
>  2008-03-08 20:54:20.544 AFD: Opened codec 0x8459bd0, id(MPEG2VIDEO) type(Video)
>  2008-03-08 20:54:20.544 AFD: codec MP2 has 2 channels
>  2008-03-08 20:54:20.544 AFD: Opened codec 0x8343590, id(MP2) type(Audio)
>  2008-03-08 20:54:20.544 AFD: Audio Track #1 is A/V stream #1 and has 2 channels
>  in the Undetermined language(7695972).
>  2008-03-08 20:54:20.544 AFD: Selected track 1: Undetermined MP2 2ch (A/V Stream
>  #1)
>  2008-03-08 20:54:20.544 AFD: Initializing audio parms from audio track #1
>  2008-03-08 20:54:20.544 AFD: Audio format changed
>                         from id(NONE)    -1Hz -1ch   0bps    ; id(NONE)    -1Hz
>  -1ch   0bps
>                         to   id( MP2) 44100Hz  2ch  16bps    ; id( MP2) 44100Hz
>   2ch  16bps
>  2008-03-08 20:54:20.547 AO: Needs upmix
>  2008-03-08 20:54:20.547 AO: Killing AudioOutputDSP
>  2008-03-08 20:54:20.547 Opening audio device 'default'. ch 6(2) sr 44100
>  2008-03-08 20:54:20.547 Opening ALSA audio device 'default'.
>  2008-03-08 20:54:20.654 in SetParameters(format=2, channels=6, rate=44100, buffe
>  r_time=500000, period_time=125000)
>  2008-03-08 20:54:20.655 get_buffer_size returned 15052
>  2008-03-08 20:54:20.655 set_period_time_near returned 21333
>  2008-03-08 20:54:20.655 get_period_size returned 940
>  2008-03-08 20:54:20.655 AO: Audio fragment size: 6144
>  2008-03-08 20:54:20.656 AO: create upmixer
>  2008-03-08 20:54:21.411 AO: create upmixer done with surround mode 2
>  2008-03-08 20:54:21.411 AO: Audio Stretch Factor: 1
>  2008-03-08 20:54:21.411 Audio Codec Used: not set
>  2008-03-08 20:54:21.411 AO: Ending reconfigure
>  2008-03-08 20:54:21.411 AO: Needs upmix
>  2008-03-08 20:54:21.411 AO: no change exiting
>  2008-03-08 20:54:21.412 AO: kickoffOutputAudioLoop: pid = 6158
>  2008-03-08 20:54:21.412 AO: OutputAudioLoop: Play Event
>  2008-03-08 20:54:21.414 AO: Needs upmix
>  2008-03-08 20:54:21.415 AO: no change exiting
>  2008-03-08 20:54:21.415 AO: Pause 1
>  2008-03-08 20:54:21.417 AO: OutputAudioLoop: audio paused
>  2008-03-08 20:54:21.438 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video Texture'
>  2008-03-08 20:54:21.444 WriteAudio: buffer underrun
>  2008-03-08 20:54:21.449 OSD Theme Dimensions W: 640 H: 480
>  2008-03-08 20:54:21.634 TV: Changing from None to WatchingPreRecorded
>  2008-03-08 20:54:21.634 AO: Pause 1
>  2008-03-08 20:54:21.635 AO: OutputAudioLoop: audio paused
>  2008-03-08 20:54:21.644 Realtime priority would require SUID as root.
>  Initialize Yadif Deinterlacer. In-Pixformat = 1 Out-Pixformat=1
>  yadifdeint: size changed from 0 x 0 -> 352 x 240
>  2008-03-08 20:54:21.754 OpenGLVideoSync()
>  2008-03-08 20:54:21.811 Video timing method: SGI OpenGL
>  2008-03-08 20:54:21.829 AO: Pause 0
>  2008-03-08 20:54:21.830 WriteAudio: buffer underrun
>  2008-03-08 20:54:25.074 TV: Attempting to change from WatchingPreRecorded to Non
>  e
>  2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- begin
>  2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- middle
>  2008-03-08 20:54:25.096 ~OpenGLVideoSync() -- end
>  2008-03-08 20:54:25.120 AO: Killing AudioOutputDSP
>  2008-03-08 20:54:25.125 AO: OutputAudioLoop: Stop Event
>  2008-03-08 20:54:25.125 AO: kickoffOutputAudioLoop exiting
>  2008-03-08 20:54:25.219 TV: Changing from WatchingPreRecorded to None
>
>
>  Any ideas?  Let me know if there's anything else I can provide.  I've
>  removed my .asoundrc file, using ALSA:Default.  Connecting to my
>  receiver via SPDIF.
>
>  Thanks!
>  Matt
>

I also see this in my logs:
2008-03-08 20:58:47.119 AO: OutputAudioLoop: Play Event
2008-03-08 20:58:47.119 WriteAudio: buffer underrun
Initialize Yadif Deinterlacer. In-Pixformat = 1 Out-Pixformat=1
yadifdeint: size changed from 0 x 0 -> 352 x 240
2008-03-08 20:59:00.360 [mpeg2video @ 0xb7282a28]warning: first frame is no keyf
rame
2008-03-08 20:59:00.369 NVP: prebuffering pause
2008-03-08 20:59:00.369 AO: Pause 1
2008-03-08 20:59:00.373 AO: OutputAudioLoop: audio paused
2008-03-08 20:59:00.519 [mpeg2video @ 0xb7282a28]invalid mb type in B Frame at 3
 12
2008-03-08 20:59:00.520 [mpeg2video @ 0xb7282a28]mb incr damaged
2008-03-08 20:59:00.520 [mpeg2video @ 0xb7282a28]end mismatch left=853 515FD0
2008-03-08 20:59:00.520 [mpeg2video @ 0xb7282a28]Warning MVs not available
2008-03-08 20:59:00.743 [mpeg2video @ 0xb7282a28]Warning MVs not available
2008-03-08 20:59:00.774 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.775 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.776 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.776 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.777 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.777 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.778 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.779 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.780 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.780 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.780 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.781 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.782 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.783 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.783 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.783 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!
2008-03-08 20:59:00.784 NVP::AddAudioData():p1: Audio buffer overflow, audio dat
a lost!

Matt