This is a minor release. There are no major changes, rather, several bugs have been fixed, and a few new features have been added. A more complete log of changes: Fix bug allowing for transparent picture overlays. Fix bug preventing picts from being used in multitrack. Add highpass/lowpass filters Fix color filters when written out to mp4 files Fix bug in composite-merge where rgb was separated into different videos. Update live-capture (internal) data structure to use device indexes as well as strings. Enable ffmpeg logging at the racket layer IF the FF_LOG environment variable is set to racket. Add locks to fix potential inconsistent state in ffmpeg. Add a 'mirror' option to the renderer, to output to multiple places at once. Renderer can now split output into two files one for video, and one for audio. Preview window works again with live webcams