[mythtv-users] MythTV Light on RPi 3b
gedakc at gmail.com
Mon Jan 11 18:14:14 UTC 2021
Doh! I accidentally hit send. Here is full message.
Currently I'm setting up an RPi4 as a combined FE/BE with MythTV 31. So
far it has gone well and I do not experience any tearing.
With my Intel x86_64 setup I had a devil of a time fixing this and
finally used a OpenGL with a compositor on Mythbuntu 14.04 . That
version has proven stable for me and family members so I have not
Now back to responding to your questions:
I used the instructions  from Jim Abernathy, which use the playback
profile MMAL decode only + OpenGL YV12 renderer.
I installed Raspberry Pi OS Lite 2020-12-02 and hence avoid the overhead
I use the MMAL decoder settings as described in the first post of the
mythtv forum thread .
I am documenting my steps but have a ways to go before I share these
'Hope that helps,
On 2021-01-11 12:53 a.m., Martin Bene wrote:
> I've just spent the last couple of days upgrading my mythtv system (backend plus 5 Raspberry 3b Frontends).
> I wanted to go from 0.27 to 31, but in the end I gave up on 31 and went with 30 instead because I could not get acceptable playback on 31.
> Both on .27 and on 30 Playback up to and including 1920p50 works perfectly using the openmax decode and openmax render methods, even without MPEG license.
> For 31, I installed 2020-12-02-raspios-buster-armhf, updated and followed the wiki instructions for new playback profile using V4L2 decode only + OpenGL YV12 renderer (both with and without MPEG license). With all settings I tried I had slight tearing in playback.
> Can you post the /boot/config.txt you're using and the playback profile settings you settled on? Are you using a decoder license? Do you run mythtv from an lxsession or are you using eglfs?
> I could get autostart working for lxsession using .config/lxsession/LXDE-pi/autostart; running QT_QPA_PLATFORM=eglfs mythfrontend didn't work for me.
> Regards, Martin
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