...Direct interaction with the video allows to be fast and reactive, and to move and deform them on screen.
The output of your operations is shown in the output window, typically displayed in full-screen on an external monitor or a projector. But the output can also be saved as a video file.
Control GLMixer through network using OpenSoundControl, and generate graphics with ShaderToy GLSL code.
Download : https://sourceforge.net/projects/glmixer/files/
Please note GLMixer is discontinued and superseded by vimix
https://brunoherbelin.github.io/vimix/