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.
>

Yes, I ran the SDL GL test program (testgl) and here is the output

Screen BPP: 32

Vendor     : Mesa project: www.mesa3d.org
Renderer   : Mesa GLX Indirect
Version    : 1.3 Mesa 4.0.4
Extensions : GL_ARB_imaging GL_ARB_multitexture GL_ARB_texture_border_clamp 
GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_texture_env_combine 
GL_ARB_texture_env_dot3 GL_ARB_transpose_matrix GL_EXT_abgr 
GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract 
GL_EXT_texture_env_add GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 
GL_EXT_texture_lod_bias

I don't know anything about openGL or textures but I'll start doing some 
research.

I should have mentioned earlier that for this project I can specify any 
video card I want.  So if someone has a suggestion of what would be the best 
video card for this type of application please let me know.

Thanks for the help.