[mythtv-users] Ticket #8509: Fast chopping / stuttering in mythmusic after hdaudio merge

Jean-Yves Avenard jyavenard at gmail.com
Sun May 30 04:43:54 UTC 2010


Hi

On Sunday, May 30, 2010, Kenneth Emerson <kenneth.emerson at gmail.com> wrote:
> I have experienced the same results with MythMusic (described in ticket 8509) since upgrading to trunk with the hdaudio merge.  Prior to the merge I was using ALSA:plughw,1,0 as my main audio device and "default" in MythMusic setup for the audio device.
>
> After upgrading to 24896, I switched the main audio device from ALSA:plughw,1,0 to ALSA:iec958:CARD=External,DEV=0.  If I leave the music audio device at default, I get the choppy,stuttering output described in ticket 8509.  When I change the music device to /dev/dsp1 the music plays normally.
>
> If I leave the music device at default and check the PCM Analog box in the general MythTV audio configuration screen, the frontend segfaults (I have a coredump).
>

Then why not provide a backtrace in the ticket?

The 8509 ticket is unfortunately close to useless.

It does not provide any information that could actually help diagnose
the problem.

/dev/dsp is OSS audio

The PCM checkbox is only necessary when using multichannel audio.

What happens if you leave the audio config like it was before? (ALSA:plughw,1,0)


> The output from the frontend is:
>
> 2010-05-29 14:14:44.166 AO: Opening audio device 'iec958:CARD=External,DEV=0' ch
>  2(2) sr 44100 sf signed 16 bit reenc 0
> 2010-05-29 14:14:44.167 Opening ALSA audio device 'iec958:CARD=External,DEV=0'.
> 2010-05-29 14:14:44.895 ScreenSaverX11Private: DPMS Deactivated 1
> 2010-05-29 14:15:01.212 ScreenSaverX11Private: DPMS Reactivated 1
> 2010-05-29 14:15:03.522 Loading menu theme from /usr/local/share/mythtv/music_se
> ttings.xml
>
> Music stutters.
>
>
> 2010-05-29 14:15:48.166 XMLParse: LoadTheme using '/usr/local/share/mythtv/theme
> s/blue-abstract-wide_old/music-ui.xml'
> 2010-05-29 14:15:48.514 XMLParse, Warning: Unknown: area in repeated image
> 2010-05-29 14:15:48.515 XMLParse, Warning: Unknown: area in repeated image
> 2010-05-29 14:15:49.029 AO: Opening audio device '/dev/dsp1' ch 2(2) sr 44100 sf
>  signed 16 bit reenc 0
>
> Music plays fine.
>
> version info:
> ken at mythtv:~$ mythfrontend --version
> Please attach all output as a file in bug reports.
> MythTV Version   : 24896
> MythTV Branch    : trunk
> Network Protocol : 57
> Library API      : 0.23.20100526-2
> QT Version       : 4.5.0
> Options compiled in:
>  linux debug using_oss using_alsa using_backend using_directfb using_dvb using_f
> irewire using_frontend using_hdhomerun using_hdpvr using_iptv using_ivtv using_j
> oystick_menu using_libfftw3 using_lirc using_mheg using_opengl_video using_openg
> l_vsync using_qtdbus using_qtwebkit using_v4l using_x11 using_xrandr using_xv us
> ing_xvmc using_xvmc_vld using_xvmcw using_bindings_perl using_bindings_python us
> ing_opengl using_vdpau using_ffmpeg_threads using_live using_mheg
>
>


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