[mythtv-users] Upmixing with 0.25

[Karl Newman]

On Wed, May 16, 2012 at 4:50 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> On 17 May 2012 04:31, Karl Newman <newmank1 at asme.org> wrote:
>> Yes, the hang is after that last line. On the console, after I pkill
>> mythfrontend, it says Terminated after the last line posted above. I
>> can't see how to launch mplayer with a particular buffer size, but I
>> see aplay has a buffer-size and period-size parameters. I'll try to
>
> you don't have anything to do with mplayer, the parameter values it
> will use with alsa are the same as what mythtv chooses
>
>> experiment with this later. I'm wondering if it has something to do
>> with my overriding of the built-in ALSA devices (i.e., !default,
>> !surround51, etc.).
>
> could very well be a alsa lib bug... have you tried the latest version?

Aha! Apparently it is an ALSA bug. I tried aplay with
--buffer-size=15360 --period-size=1536 and it played the wav file and
then hung. When I terminated it with Ctrl-C it gave a glibc backtrace
warning of attempting to free an invalid pointer. So, I'll take this
up with the ALSA list.

BTW, I'm using the latest released ALSA versions for alsa-driver
(in-kernel), alsa-lib and alsa-utils, which is version 1.0.25.

Karl