cat /dev/video0 | ffmpeg \
-threads 3 \
-i - ... \
-t 15 \
-vcodec h264 \
-b 700kb/s \
-r 29.97 \
-acodec aac \
-ab 128kb/s \
-ac 2 \
-alang eng \
-deinterlace \
tmp.mp4