Provide multi-purpose Worker.run(args, options)

[caugner]

Is your feature request related to a problem? Please describe.
So far, I have been using videoconverter.js, which provided a general-purpose ffmpeg_run() method that took arguments and files and returned a list of files as a result.

Describe the solution you'd like
It would be great if ffmpeg.js could offer an equivalent method. This would allow easy migration from videoconverter.js.

Describe alternatives you've considered
Alternatively, there could be a guide on how to migrate from videoconverter.js.

Additional context
One use case is giving ffmpeg an audio file and exporting several extracts into individual files:

// ffmpeg -i input.wav -map 0 -c copy -f segment -segment_time 120 -reset_timestamps 1 out%02d.wav

const blob = new Blob(/** from user */, { type: "audio/wav" });
const file = new File([blob], 'input.wav');

const fs = require('fs');
const { createWorker } = require('@ffmpeg/ffmpeg');

const worker = createWorker();

(async () => {
  await worker.load();
  const { files } = await worker.run('-i input.wav -map 0 -c copy -f segment -segment_time 120 -reset_timestamps 1 out%02d.wav', { files: [file] });
  files.forEach(file => fs.writeFileSync(file.name, file.data));
})();

[jeromewu]

Good suggestion! I will add this API in next release.

[jeromewu]

Hi, I have added Worker.run in ffmpeg.js v0.3.0, you can check here for usage: https://github.com/ffmpegjs/ffmpeg.js/blob/master/docs/api.md#worker-run