How I can run a command that produces multiple files.

[supinder-cf]

I strongly need to run this type of commands: ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:20:00 -f segment -reset_timestamps 1 output%03d.mp4

This command takes one video as an input and produces multiple files as an output. I couldn't find a way to run this command via wasm.
Below is my finest try:

 ffmpeg.FS("writeFile", fileName, await fetchFile(filePath));
    //  ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:20:00 -f segment -reset_timestamps 1 output%03d.mp4
    await ffmpeg.run("-i", fileName, '-c', 'copy', '-map', '0', '-segment_time', '00:10:00', '-f', 'segment', '-reset_timestamps', '1', "output%03d.mp4");
    // read file from Memory filesystem 
    await fs.promises.writeFile(filePath, ffmpeg.FS('readFile', 'output%03d.mp4'));

Please suggest any idea.