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webcodecsController()

Pass webcodecsController() to controller to steer the convertMedia() function.

Use webcodecsController()
tsx
import {webcodecsController, convertMedia} from '@remotion/webcodecs';
 
const controller = webcodecsController();
 
convertMedia({
  src: 'https://www.w3schools.com/html/mov_bbb.mp4',
  container: 'webm',
  controller,
});
 
// Pause
controller.pause();
 
// Resume
controller.resume();
 
// Abort
controller.abort();

API​

This function returns an object that can be passed to convertMedia({controller}).

It has the following methods:

pause()​

Pauses the conversion.

resume()​

Resumes the conversion.

abort()​

Aborts the conversion.

addEventListener()​

See events below.

removeEventListener()​

See events below.

Events​

You can attach event listeners to the webcodecsController object.

Use events
tsx
import {webcodecsController, convertMedia} from '@remotion/webcodecs';
 
const controller = webcodecsController();
 
const onPause = () => {
  console.log('Paused');
};
 
const onResume = () => {
  console.log('Resumed');
};
 
controller.addEventListener('pause', onPause);
controller.addEventListener('resume', onResume);
 
// Make sure to cleanup later:
controller.removeEventListener('pause', onPause);
controller.removeEventListener('resume', onResume);

The webcodecsController object emits the following events:

pause​

Emitted when the conversion is paused.

resume​

Emitted when the conversion is resumed.

See also​