Re: Multiple Xv overlays cause blue flashing

Smoof . wrote:

>
> My plan was to do all the rendering with the same client and I know 
> that my overlay adaptor only has a single port for the YUV420 format 
> that I am using.  Can someone say if the following would be possible:
>
> Suppose I create a single overlay that is the size of the entire 
> screen.  Then I could track the absolute position and visibility of 
> the individual widget windows I want to send the video streams to.  I 
> would then tile in the images into the correct spot in the overlay to 
> match the window position.  Now, if there were some way of using the 
> alpha channel to only cause the certain portions of the overlay to be 
> seen then that might do the trick.  Or could I just manually fill the 
> areas I want to expose with the color key?  Please keep in mind that I 
> really don't know what I'm talking about and have no idea if this is 
> possible but it sounds like the only way to prevent the flashing is to 
> use a single overlay and somehow figure out how to share it among the 
> widget windows.


Does your graphics card support OpenGL?  One practical alternative is to 
render the movies into textures.

-- 
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.