ffmpeg -i 13.Orbital_-_Petrol.ogg -i cover.jpg -map 0:a -map 1:v -preset slow -movflags +faststart -c:a libopus -b:a 90k -c:v libvpx-vp9 -pix_fmt yuv420p -loop 0 -r 1 -y /tmp/Orbital_-_Petrol.webm