set -a
mkdir -p frames
ffmpeg \
-i colamath-dv.avi \
-vf 'yadif=1,scale=256:192' \
-an \
-y 'frames/colamath-%04d.png'
-vn \
-ac 1 \
-ar 15734 \
-acodec pcm_u8 \
-y 'colamath-audio.wav'