I ran this command: ffmpeg -i mymovie.mpg -deinterlace -ar 44100 -r 25 -qmin 3 -qmax 6 mymovie.flv and then I try to play that with this tool http://www.longtailvideo.com/players/jw-flv-player/ I did this before but last time someone else converted to FLV for me. Now the flv-player just says "Buffering" and never plays... Did I do the conversion wrong?