[mythtv] Qt warnings on mythfrontend start

[Stuart Auchterlonie]

On 07/01/2020 21:46, Klaas de Waal wrote:
> Hi Mark,
>>
>> The message is telling you that the VAAPI functionality check failed
>> and as a result you are using software playback.
>>
>> Assuming you are using wayland, I'm fairly sure the issue is that you
>> don't have the vaapi drm package installed. FFmpeg these days uses a
>> DRM connection first and only then falls back to trying an X11
>> connection.
>>
>> What does 'grep -in vaapi_drm *' show when run from your mythtv source
>> directory?
>>
>> If VAAPI DRM is available, it should show something like:-
>>
>> config.h:389:#define HAVE_VAAPI_DRM 1
>> config.mak:547:HAVE_VAAPI_DRM=yes
>>
>> Likewise 'apt search libva-drm' should tell you what packages are installed.
>>
> I am using apparently x11 as indicated by the value of XDG_SESSION_TYPE.
> The grep in mythtv/mythtv shows:
> config.ep:1399:    vaapi_drm
> config.ep:5793:check_lib vaapi_drm va/va.h va/va_drm.h vaGetDisplayDRM
> -lva -lva-drm
> config.h:389:#define HAVE_VAAPI_DRM 1
> config.mak:547:HAVE_VAAPI_DRM=yes
> configure:1855:    vaapi_drm
> configure:6169:    check_lib vaapi_drm "va/va.h va/va_drm.h"
> vaGetDisplayDRM -lva -lva-drm
> 
> Which suggests that the VAAPI stuff should be there...
> Maybe the use of x11 is the determining factor, as most people with
> Fedora 31 seem to have Wayland as this is the current default IIRC. I
> think I freshly installed  this system with Fedora 29 when X11 was
> still default, and have since then upgraded.
> 
> I just now installed this package;
> $ sudo dnf install libva-utils
> which gives us the vainfo command.
> The vainfo output also gives errors:
> [
> klaas at modu mythtv]$ vainfo
> libva info: VA-API version 1.6.0
> libva info: va_getDriverName() returns 0
> libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
> libva info: va_openDriver() returns -1
> vaInitialize failed with error code -1 (unknown libva error),exit
> 
> The library /usr/lib64/dri/i965_drv_video.so is indeed not present and
> I cannot find in which package it is hidden. If it exists.
> 

The simplest way to check i've found is just to do

# ps -ef | grep -i wayland

Regards
Stuart