available since v4.0
In order to use ffmpeg without having to directly install it, Remotion provides it via npx remotion ffmpeg.
Note that in order to keep the binary size small, the FFmpeg binary only understand the codecs that Remotion itself supports: H.264, H.265, VP8, VP9 and ProRes. A binary from the 7.1 release line of FFmpeg is used.
Example
Convert a video file to an audio file
bashnpx remotion ffmpeg -i input.mp4 output.mp3
bashnpx remotion ffmpeg -i input.mp4 output.mp3
To find out more about FFmpeg, visit their docs.