You can use ffmpeg to do lossless trimming of files (say, to break a single video into multiple videos, or to trim off dead time). {link: http://askubuntu.com/questions/35605/splitting-an-mp4-file source } {code} -# START and LENGTH are seconds or hh:mm:ss. -ffmpeg -acodec copy -vcodec copy -ss START -t LENGTH -i ORIGINALFILE.mp4 OUTFILE.mp4 +ffmpeg -ss START -t LENGTH -i ORIGINALFILE.mp4 -codec copy OUTFILE.mp4 {endcode} {subsection: Cropping}