l-smash: l-smash (open source mp4 handler) l-smash: l-smash: l-smash is a set of simple open source tools for the mp4 container. It l-smash: rivals Mp4Box from GPAC in muxing, demuxing and tagging mp4, mov, 3gp, l-smash: 3g2, m4a and m4v files. l-smash: l-smash: Included in the package are four executables: boxdumper, muxer, l-smash: remuxer, and timelineeditor. There are no man pages for these, but l-smash: each one can be run with --help to see usage information. l-smash: l-smash: