Snowmix is a video mixer tool for mixing live and recorded video and audio feeds. It supports clipping, scaling and transparent overlay of video, png graphics and text. It supports animation of video, images and texts through native commands changing scale, placement, transparency and rotation. Animation and actions can also be controlled through native scripting and an embedded Tcl interpreter. Snowmix is designed for control over low bandwidth links and can work as a standalone CLI based program. Control over both CLI and a TCP connections.

Live and recorded video feeds can be fed to the mixer via GStreamer pipelines. Output can be accessed through GStreamer pipelines.

Currently only the Linux platform is supported though compilation on OS X has been successful.

Home page here: http://sourceforge.net/projects/snowmix/

Snowmix in action: