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webFsWriter

warning

We are phasing out Remotion WebCodecs and are moving to Mediabunny!

💼 Important License Disclaimer
This package is licensed under the Remotion License.
We consider a team of 4 or more people a "company".

For "companies": A Remotion Company license needs to be obtained to use this package.
In a future version of @remotion/webcodecs, this package will also require the purchase of a newly created "WebCodecs Conversion Seat". Get in touch with us if you are planning to use this package.

For individuals and teams up to 3: You can use this package for free.

This is a short, non-binding explanation of our license. See the License itself for more details.
warning

Unstable API: The writer interface is experimental. The API may change in the future.

A writer for @remotion/webcodecs that writes to the browser's file system using the File System Access API.

Can be used for convertMedia() to write the converted output directly to a temporary file in the browser's origin-private file system.

Availability​

This writer is only available in browsers that support the File System Access API. Use canUseWebFsWriter() to check if it's available.

Example​

Using webFsWriter
import {convertMedia} from '@remotion/webcodecs';
import {webFsWriter} from '@remotion/webcodecs/web-fs';

const result = await convertMedia({
  src: 'https://remotion.media/BigBuckBunny.mp4',
  container: 'webm',
  writer: webFsWriter,
});

const blob = await result.save();

canUseWebFsWriter()​

A function that returns a Promise<boolean> indicating whether the webFsWriter can be used in the current environment.

Checking availability
import {canUseWebFsWriter, webFsWriter} from '@remotion/webcodecs/web-fs';

const canUse = await canUseWebFsWriter();
if (canUse) {
  // Use webFsWriter
} else {
  // Fall back to bufferWriter or another writer
}

See also​