[mythtv-users] .asoundrc plugins work for some video files and not other with the internal player in 0.23-fixes

Robert Havlin bob.havlin at gmail.com
Sun Jun 20 14:43:48 UTC 2010


I posted a ticket regarding this issue at
http://svn.mythtv.org/trac/ticket/8559 , but thought someone on this list
might have run into a similar problem.

After recently upgrading to mythbuntu 10.04, I noticed that some files have
no sound while other behave as expected (i.e. the sound is nicely leveled /
normalized).

I have been using the .asoundrc ladspa plugin solution for volume leveling
(like in the first post here:
http://www.gossamer-threads.com/lists/mythtv/mythtvnz/422662 ) for about 1
year and never noticed this type of problem with the sound.

When I look at the frontend logfile it shows:

2010-06-13 14:03:16.312 TV: Attempting to change from None to
WatchingPreRecorded
2010-06-13 14:03:16.421 AFD: codec AAC has 2 channels
2010-06-13 14:03:16.421 AFD: Opened codec 0x9b02610, id(AAC) type(Audio)
2010-06-13 14:03:16.425 AFD: Opened codec 0x9b013f0, id(H264) type(Video)
2010-06-13 14:03:16.743 Opening audio device 'ladcomp'. ch 2(2) sr
44100 (reenc 0)
2010-06-13 14:03:16.744 Opening ALSA audio device 'ladcomp'.
2010-06-13 14:03:16.780 *AudioOutput Error: Unable to set buffer time
400000 for playback: Invalid argument*
2010-06-13 14:03:16.780 *AudioOutput Error: Unable to set ALSA parameters*
2010-06-13 14:03:16.781 *NVP(0): Disabling Audio, reason is: Unable to
set ALSA parameters*

Also, another different video (this time in mythvideo) shows the same
problem:

2010-06-13 14:10:24.317 TV: Attempting to change from None to WatchingVideo
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared
object file: No such file or directory
2010-06-13 14:10:25.819 VDPAU Error: Error at
mythrender_vdpau.cpp:1478 (#1, Unknown)
2010-06-13 14:10:25.819 VDPAU Error: Failed to create VDPAU device.
2010-06-13 14:10:25.819 VDPAU Error: No VDPAU device
2010-06-13 14:10:25.819 VDPAU: Failed to create dummy device.
2010-06-13 14:10:25.859 AFD: Opened codec 0xae5670a0, id(MPEG4) type(Video)
2010-06-13 14:10:25.859 AFD: codec MP3 has 2 channels
2010-06-13 14:10:25.859 AFD: Opened codec 0xae567890, id(MP3) type(Audio)
2010-06-13 14:10:26.283 Opening audio device 'ladcomp'. ch 2(2) sr
44100 (reenc 0)
2010-06-13 14:10:26.284 Opening ALSA audio device 'ladcomp'.
2010-06-13 14:10:26.326 *AudioOutput Error: Unable to set buffer time
400000 for playback: Invalid argument*
2010-06-13 14:10:26.326 *AudioOutput Error: Unable to set ALSA parameters*
2010-06-13 14:10:26.327 *NVP(1): Disabling Audio, reason is: Unable to
set ALSA parameters*

The files play fine (audio level issues aside) if I use mythtv setup
screen (Utilities/Setup->Setup->General->Audio System) to configure
the audio output device as "alsa:default" instead of "alsa:ladcomp"
(using the compressor/limiter).

 My .asoundrc is:

 pcm.ladcomp {
      type plug
      slave.pcm "ladcomp_compressor";
  }
 pcm.ladcomp_compressor {
      type ladspa
      slave.pcm "ladcomp_limiter";
      path "/usr/lib/ladspa";
      plugins [
          {
              label dysonCompress
              input {
                  #peak limit, release time, fast ratio, ratio
                  controls [0 1 0.5 0.99]
              }
          }
      ]
  }
 pcm.ladcomp_limiter {
      type ladspa
      slave.pcm "plughw:0,0";
      path "/usr/lib/ladspa";
      plugins [
          {
              label fastLookaheadLimiter
              input {
               #InputGain(Db) -20 -> +20 ; Limit (db) -20 -> 0 ;
Release time (s) 0.01 -> 2
               controls [ 20 0 0.8  ]
              }
          }
     ]
  }


 My system is mythbuntu 10.04 LTS


MythTV Version   : 25073
MythTV Branch    : branches/release-0-23-fixes
Network Protocol : 56
Library API      : 0.23.20100429-1
QT Version       : 4.6.2
Options compiled in:


linux debug using_oss using_alsa using_pulse using_jack
using_pulseoutput using_backend using_dvb using_firewire using_frontend
using_glx_proc_addr_arb using_hdhomerun using_hdpvr using_iptv
using_ivtv using_joystick_menu using_libudev using_lirc using_mheg
using_opengl_video using_opengl_vsync using_qtwebkit using_v4l using_x11
 using_xrandr using_xv using_xvmc using_xvmc_vld using_xvmcw
using_bindings_perl using_bindings_python using_opengl using_vdpau
using_ffmpeg_threads using_libavc_5_3 using_live using_mheg


If you have any ideas how to fix this, please let me know.


Thanks,
Bob
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