Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs. Tasks can be automated using projects, job queue and powerful scripting capabilities
You can use Avidemux to cut scenes from an existing video, merge multiple clips, apply a variety of video filters ans optionally re-encode the video to a different format. Other features include a built-in bitrate calculator, automatic video settings for popular uses (iPod, DVD etc.) and several advanced video toolsMost common codecs are supported (M-JPEG, MPEG, DivX, Xvid, huffyuv, WMA, etc.)Avidemux is available for Linux, BSD, Mac OS X and Microsoft Windows under the GNU GPL license.