ffmpeg -i /home/prova.mov -target pal-dvd -ps 2000000000 -aspect 16:9 /home/test.avi
Oppure
ffmpeg -i c:\spot.avi -qscale 0 -s 1920x1080 -aspect 16:9 c:\spot_ok.avi
ffmpeg -i in.avi -b 8500k -vcodec libx264 -acodec libfaac -s 720x576 out.avi