This is a quick update following release of version 0.5. MJPEG recording is now officially implemented and supported on Mac and Linux both in bundle and running from source. Unlike version 0.5.3 we no longer rely on a ffmpeg executable to be present for this. Its back to simply download and install the bundle. New Feature: MJPEG direct recording By setting bigger file, less CPU in the recorder options, CPU load of recording is reduced to almost 0. While the file size of this recoding type is more that the MPEG4 compressed format we usually use, we can save substantial CPU time by simply saving camera jpeg frames into a .mkv container. This also yields the best possible image quality. We really recommend this option when disk space is plentiful (most cases) while CPU load directly affects battery lifetime on mobile computers. If you are running Pupil from source please make sure to use our fork of PyAV