Ruotare di 90 gradi CW un video:

mencoder -vf rotate=1 -ovc lavc -oac copy 05042010029.mp4 -o rotate.avi

Convert other video to FLV

ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320×240 video.flv

ffmpeg -i input.mpg -ab 56k -ar 11025 -b 500k -r 15 -s 320×240 output_320.flv

-i input file name
-ar audio sampling rate in Hz
-ab audio bit rate in kbit/s
-f output format
-s output dimension

ed il contrario da FLV ad AVI o MPG

ffmpeg -i FileVideo.flv -ab 56 -ar 22050 -b 500 -s 320×240 -vcodec xvid -acodec mp3 VideoConvertito.avi

ffmpeg -i FileVideo.flv -ab 56 -ar 22050 -b 500 -s 320×240 VideoConvertito.mpg

oppure usando mencoder:

mencoder video.flv -oac copy -ovc lavc -o video.avi