[mythtv] Logging of vaapi devices on master frontend

[David Hampton]

On Fri, 2022-07-15 at 19:51 +0200, Roland Ernst wrote:
>  I get bad logs from frontend when I enable --loglevel debug
> 
> It looks like
> 2022-07-15 18:12:42.707452 D [18722/18722] CoreContext
> mythrenderopengl.cpp:1433 (CreateShaderProgram) - 
> #version 110
> #define lowp
> #define mediump
> #define highp
> #line 1
> attribute vec2 a_position;
> attribute vec4 a_color;
> varying   vec4 v_color;
> uniform   mat4 u_projection;
> uniform   mat4 u_transform;
> void main() {
>     gl_Position = u_projection * u_transform * vec4(a_position, 0.0,
> 1.0);
>     v_color     = a_color;
> }
> etc...
> 
> Attached the log file of the frontend.
> How to debug, fix this issue?

I've seen that before.  I think Mark did that intentionally so you
could see what the shaders are being programmed to do.  I've always
just ignored it.

It should probably be moved from VB_GENERAL to something else. Maybe
VB_GPU or VB_GPUVIDEO? Or give it its own flag.

David