# 4 Kdenlive OS: Mac OS X, Linux, FreeBSD Supported Formats: DV / HDV, AVCHD, MPEG2, MP4( MPEG4 / H. 264), AVI, WMV, FLV etc. Kdenlive shows excellent work on video editing based on the MLT Framework and KDE as an open-source free program. It allows users to merge a set of media including video, audio and image into a single file with customized resolution, frame rate, PAR and DAR. The multi-track editing with a timeline can be applied to an unlimited number of video / audio tracks. This video editing software for Mac also owns essential tools to create, delete, move and crop clips, while a diverse of effects and transitions for video / audio, like rotations, colors, phase and pitch shifting, volume and more are used for enriching the output file.