Keith Reilly wrote: >input: >ffprobe -v quiet -print_format json -show_format >-show_streams file.mp4 >output: >ffprobe: failed to set value 'quiet' for option 'v' You may use: -loglevel quiet Hope this helps! Reto AV Preservation by reto.ch chemin du Suchet 5 | 1024 Ecublens | Switzerland Web: https://reto.ch | Twitter: @retoch