Something

convert 459.jpg -depth 8 -resize 720x480! ppm:- | ppmtoy4m -n 179 -I p -r -A 10:11 -S 420mpeg2 | ffmpeg -f yuv4mpegpipe -an -i - -sameq -s 720x480 -r 29.970 -aspect 4:3 -cmp 2 -subcmp 2 -mbd 2 -flags +trell ringing.m2v