[mythtv-users] MythTV Compile Options

[Michael T. Dean]

Brian Wood wrote:

>I notice that MythTV by default seems to compile without mmx on my  
>amd64. Clearly the CPU supports the mmx instructions, so is there any  
>reason not to force it to use them? Any great benefit to using them  
>(probably de-interlace)?
>  
>
./configure --enable-proc-opt

If you compile without it, you get:
WARNING: If you plan to watch HDTV recordings you probably need to run 
./configure with --enable-proc-opt

If you compile with it, you get:
WARNING: When using --enable-proc-opt you must include the output of 
./configure along with any bug report.

So, pick your poison.

>Also, is OpenGL support required in order to use XvMc? I think the  
>"nvidia" compile-time option
>
This sounds like a Gentooism or something.  In Myth, configure takes:

--enable-opengl-vsync

and

--enable-xvmc
*
*

> really means "XvMc", but is the nVidia  
>OpenGL required in order to use this?
>
No.  (At least not OpenGL vsync--the NVIDIA drivers always come with 
support for OpenGL, so you can't install them without, so I'm assuming 
your talking about Myth's "OpenGL vsync").

>The obvious reason for the above is that if I use nVidia's OpenGL I  
>get the infamous "high CPU load" problem, but I'd like to use XvMC.  
>The way I see it right now I can't, is this correct?
>  
>
No.

>Is the best answer to try and get older versions of nVidia's drivers  
>to work on my machine? (so far I haven't been able to do that), or  
>wait and hope nVidia figures out vSync?
>  
>
Just turn off OpenGL vsync with a setting in 0.18-fixes or higher and 
turn on XvMC.

Mike