[mythtv-users] Problem with video buffer when watching a DVD

[Adam Jimerson]

Jean-Yves Avenard wrote:
> Hi
>
> On 23 March 2011 12:40, Adam Jimerson <vendion at gmail.com> wrote:
>> When watching a DVD myth will stop playback taking me back to the menu with
>> a popup informing me that the video frame buffer has failed to many times.
>> I have already tried manually increasing the size of the buffers for asound
>> and restarting ALSA because when running the frontend in verbose mode I saw
>> where it was complaining about the audio buffer underrun.  I increase the
>> size of the buffer from 64 to 3072 and it is still happening.  This only
>
> The ALSA buffer has nothing to do with the video buffer.
>
> So increasing that buffer won't fix your issue.
>
> The minimum buffer recommended is 128kB now ; but many audio cards
> (e.g. most audio cards other than HDA ones) will only have a 64kB
> buffer.
>
> In practice it should work for most people even with only 64kB if all
> you play is stereo audio (or AC3/DTS). For multi-channels audio (LPCM
> or analog) you do need more buffer than 64kB.
>
> back on topic.
>

Yea I found that out the hard way now myth won't let me use
"surround71:CARD=SB,DEV=0" as my audio device anymore saying the device
is in use or invalid.  One of the reasons why I bumped it up was because
I use upmixing constantly and have a couple of multi-channel audio
tracks.  The troubleshooting guide suggested 3072... now I guess have
have to troubleshoot the problem the troubleshooting has caused...

Under /proc/asound/card0 I have pcm0c,pcm0p,pcm1c,pcm1p,pcm2c the only
one that is showing active is the pcm0p everything else is showing
"closed" any ideas as to what I need to do to re enable this device?

>> happens on some disks, but on the disks it does happen to it happens at the
>> same spot every time, I have checked these disks for physical damage but
>> didn't find anything but a couple of finger prints which I preceded to
>> clean.  I don't know what else to check for in this case any help will be
>> gratefully appreciated.  If it helps here is my output
>> http://pastebin.com/EJjD253c
>
> What's the version of the mythfrontend you are running.
> mythfrontend --version
>

vendion ~ $ mythfrontend --version
Please attach all output as a file in bug reports.
MythTV Version   : 0.24
MythTV Branch    : exported
Network Protocol : 63
Library API      : 0.24.20101028-1
QT Version       : 4.7.1
Options compiled in:
 linux release using_alsa using_oss using_backend using_bindings_perl
using_bindings_python using_dvb using_firewire using_frontend
using_hdhomerun using_hdpvr using_iptv using_ivtv using_joystick_menu
using_lirc using_mheg using_opengl_video using_opengl_vsync
using_qtdbus using_qtwebkit using_v4l using_x11 using_xrandr using_xv
using_xvmc using_xvmc_vld using_xvmcw using_bindings_perl
using_bindings_python using_mythtranscode using_opengl using_vdpau
using_ffmpeg_threads using_live using_mheg

According to Pacman the build date for the packages is Wed 10 Nov 2010

>>
>> Also side question what kind of mixer is mythtv looking for for volume
>> controls?  On my system I see a /dev/mixer /dev/mixer1 and /dev/mixer2 I'm
>> not sure why i have mor than one but I only have one sound card and a
>> HVR-950Q connected to my system.
>>
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>>
>>
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