PHP + ffmpeg video converter

Features: 1. converts input video to several video formats including audio format mp3 2. calculate video duration in next format 00:00:00 (hh:mm:ss) 3. takes picture from video 4. prevents uploading unsuported files before uploading is startet 5. user have an option to set quality of video/audio file 6.suported files: input:3gp, avi, mpg, mpeg, mpe4, mov, m4a, mj2, flv, wmv, mp3, ogg, webm output: .flv, mp4, avi, wmv, mp3, ogg, webm