Optional ReadonlydiscardOptional ReadonlycodecOutput audio codec. Unset keeps the container's own default.
Optional ReadonlybitrateOutput bitrate in bits per second. Unset lets the encoder choose.
Optional ReadonlysampleOutput sample rate in hertz. Unset keeps the source's.
Optional ReadonlynumberOutput channel count. Unset keeps the source's.
Optional ReadonlyforceAlways re-encode audio. Unset leaves that choice to the encoder.
Drop every audio track. Defaults to true.