Mac users interested in Syphon recorder 10.6.8 generally download:
Syphon Recorder is a Mac OS X application that allows you to record video in realtime from any Syphon-enabled application, and capture stills. Syphon Recorder is written by Tom Butterworth and Anton Marini. Syphon Recorder is free, with no restrictions on its use.
Syphon Virtual screen is a tool to share video output in applications that can go full-screen but are not yet Syphon-enabled. The framebuffer resides in CPU memory, so maybe it could not be the best solution for heavy video processing: every frame has to be uploaded to the GPU RAM to be published on a syphon server, and this is a (relatively) slow operation.
