OptionalinputOptionalinputForce input format when piping (e.g. 'mp4', 'flv', 'ogg')
OptionaloutputOutput args (codec, filters, etc.)
OptionaloutputForce output format when piping (e.g. 'mp4', 'ogg', 'flv')
OptionalparseIf true, emit progress events
Optionalbinaryffmpeg binary override
Input readable stream (replaces file input)