I've created a video mixer that responds to amplitude (of particular frequencies or not) that control the values of the [colorRGB] object. Each video has its own subpatch that governs the way (and frequencies, gain, etc.) [colorRGB] responds. That is, each video can respond independently to incoming sound, from the same channel or otherwise.

However, when I run both videos into [pix_mix], I run into a problem. The videos mix fine but only the [colorRGB] object for the first video (running into the left inlet) is affecting the color and it does no matter where the fader is. That is, regardless of how I may alter the second inlet video's [colorRGB], it seems to be bypassed and affected only by the first video's inlet [colorRGB]. I have no idea how it is doing this nor why. I've tried getting around the problem by creating a 'fader' with additional [colorRGB] objects for each video and inverting the values of alpha to no avail. The new object resets each value of the original [colorRGB] and all is lost.

I'm thinking trying to use a similar alpha-inverse subpatch and rendering them to the same rectangle? Baahh! Should be easy...

I can't say for sure without seeing your patch, but this sounds like a problem I solve with a liberal sprinkling of pix_separator all over the place.

Hmmm, I was not aware of that object. I'll try it and hopefully it works! Otherwise, you'll be hearing back from me... With the patch, of course.