ffmpeg \
-i caminandes-llamigos.webm \
-f webm \
-acodec libvorbis \
-ar 44100 \
-ac 2 \
-b:a 112k \
-vcodec libvpx \
-pix_fmt yuv420p \
-r 24 \
-quality good \
-cpu-used 2 \
-vf scale=640:360 \
-b:v 320k \
-g 240 \
-keyint_min 240 \
caminandes-llamigos.webm.flat.webm