[mythtv-users] Raspberry Pi Improvements

[Peter Bennett]

On 08/09/2016 01:08 PM, jrh wrote:
> Nothing I do eliminate the stutter.
>
I have not seen the speedup and slowdown problem except with the Dolby
passthrough. Normally if there is a slowdown you consistently get video
behind audio messages. Probably you will have to try the full raspbian.
Use the latest one from May 2016 and install updates after setting up
the SD card.

Some other things to try -

For audio playback you can try various ALSA entries from the list, or
you can try OpenMAX:hdmi. If ALSA is not working you can try using the
raspi-config advanced audio to force audio to HDMI. Changes you make
with that will affect the ALSA default but will not affect OpenMAX:hdmi.

Make sure in the audio that you select Stereo speakers and not 5.1 or
7.1 - even if you actually have surround speakers.

In setup video playback, try both openmax normal and openmax high
quality. Do they both give the problem?

I have not tried it with Raspbian Lite. The dependencies in the package
are based on the normal Raspbian. It is possible that Raspbian Lite is
missing some OpenGL component and using a software emulation of OpenGL
instead. That causes problems. The package is designed to look for the
correct OpenGL libraries but if they are not in the expected place it
may instead use the emulation libraries. The OpenMAX high quality
profile uses OpenGL.

Peter