ffmpeg -f lavfi -i mandelbrot -t 10 -c:v rawvideo -pix_fmt uyvy422 mandelbrot.avi

ffplay mandelbrot.avi

ffmpeg -f lavfi -i "sine=frequency=440" -t 10 -c:a pcm_s16le -ar 48k -ac 2 la.wav

ffplay la.wav

ffmpeg -i mandelbrot.avi -i la.wav -c:v copy -c:a copy mandela.avi

ffplay mandela.avi

ffprobe mandela.avi

ffprobe -show_format -show_streams -print_format json mandela.avi

ffprobe -show_format -show_streams -print_format json mandela.avi > mandela.txt