avoiding slab to matrix for alpha blending

heaversm's icon

Hi all - I've got a patcher that's nearly done, but I'm not happy with the performance. I read about the vade optimizations and watched the cycling74 tutorial on optimization. I've tried various combinations of things to get my framerate up - which you can see in this patch, such as qlim on the preview monitor, unique 1 on the movies, disabling onscreen on the preview window, etc.

One thing I have a feeling is that, while I'm rendering a syphon live camera feed and a movie together on a slab, I later use a matrix to alpha blend that with another video. I feel like there's a way to accomplish this while maintaining the use of slabs, but I haven't figured it out.

At any rate, if anyone is willing to have a peak at the patch and suggest some optimizations, or even point me in the right direction, I'd be incredibly grateful. Thanks!

sfx3.maxpat
Max Patch
Stephane Morisse's icon
Max Patch
Copy patch and select New From Clipboard in Max.

Send both sources in the jit.gl.slab objects then use the fader...