[mythtv-users] Am I getting full channel sound?

[Gabe Rubin]

On Mon, Aug 31, 2009 at 5:17 PM, Jean-Yves Avenard<jyavenard at gmail.com> wrote:
> 2009/9/1 Gabe Rubin <gaberubin at gmail.com>:
>
>> Is there some sample I can download and test to make sure I am getting
>> more than 2 channels?
>
> Are you running trunk or 0.21-fixes?

I am running .21-fixes (whatever the latest non-bijou package is
available from atrpms)
>
> Try this one
> http://www.avenard.org/files/media/videotest/Test%20AC3%20v2.0.avi
>
> That's a 5 channels AC3 video

I tried that and could hear the sound going to each of the speakers
(and I am sure my downstairs neighbors loved the bass that shook my
floor, their roof).  So I think everything is proper, but I do still
indication of ch2(2) in the console output:
2009-08-31 19:24:45.255 Using protocol version 40
2009-08-31 19:24:45.277 TV: Attempting to change from None to
WatchingPreRecorded
2009-08-31 19:24:47.896 AFD: Opened codec 0x93067a0, id(MPEG4) type(Video)
2009-08-31 19:24:47.897 AFD: codec AC3 has 6 channels
2009-08-31 19:24:47.901 AFD: Opened codec 0x9305a60, id(AC3) type(Audio)
2009-08-31 19:24:47.921 Opening audio device 'default'. ch 2(2) sr 48000
2009-08-31 19:24:47.922 Opening ALSA audio device 'default'.
2009-08-31 19:24:47.972 Opening audio device 'default'. ch 2(2) sr 48000
2009-08-31 19:24:47.972 Opening ALSA audio device 'default'.
2009-08-31 19:24:48.090 VideoOutputXv: XVideo Adaptor Name: 'NV17 Video Texture'
2009-08-31 19:24:48.175 Unable to parse themeinfo.xml for glass-wide
2009-08-31 19:24:48.175 The theme (glass-wide) is missing a themeinfo.xml file
2009-08-31 19:24:48.176 OSD Theme Dimensions W: 640 H: 480
2009-08-31 19:24:50.235 TV: Changing from None to WatchingPreRecorded
greedyhdeint: size changed from 0 x 0 -> 640 x 480
2009-08-31 19:24:50.243 Using realtime priority.
2009-08-31 19:24:50.342 Video timing method: USleep with busy wait
2009-08-31 19:25:23.104 RingBuf(/movies/Test AC3 v2.0.avi): Waited 1.0
seconds for data to become available...
2009-08-31 19:25:23.148 NVP: prebuffering pause
2009-08-31 19:25:24.104 RingBuf(/movies/Test AC3 v2.0.avi): Waited 2.0
seconds for data to become available...
2009-08-31 19:25:24.478 NVP: Prebuffer wait timed out 10 times.
2009-08-31 19:25:24.492 TV: Attempting to change from
WatchingPreRecorded to None
2009-08-31 19:25:24.527 TV: Changing from WatchingPreRecorded to None
>
> There are ways in MythTV to get upmixed sound from stereo to 5.1
> audio, similar to what Pro-Logic does, except the decoding is done on
> the PC directly. It gives a nice surround audio effect, even for plain
> stereo audio
> Like this video:
> http://www.avenard.org/files/media/videotest/channelsPLII.mpg
>
> While pure stereo, thanks to ProLogic II, will give you discrete 5.1 audio.
> Check ticket #5900 , there's a patch for both 0.21-fixes and trunk

I am using optical out to drive my receiver, and I believe the
receiver does upmixing.  Just wanted to make sure I was not choosing
some settings that are less than ideal.