ffmpeg -i input.mp4 -c:v libx264 -profile:v baseline -crf 23 -c:a libfaac out.mp4 {endcode} -You can use ffmpeg to to 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 } +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.