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canReencodeAudioTrack()

Part of the @remotion/webcodecs package.

warning

Unstable API: This package is experimental. We might change the API at any time, until we remove this notice.

Given an AudioTrack, determine if it can be re-encoded to another track.

You can obtain an AudioTrack using parseMedia() or during the conversion process using the onAudioTrack callback of convertMedia().

Examples​

Check if audio tracks can be re-encoded to Opus
tsx
import {parseMedia} from '@remotion/media-parser';
import {canReencodeAudioTrack} from '@remotion/webcodecs';
 
const {audioTracks} = await parseMedia({
  src: 'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
  fields: {
    tracks: true,
  },
});
 
for (const track of audioTracks) {
  await canReencodeAudioTrack({
    track,
    audioCodec: 'opus',
    bitrate: 128000,
  });
}
Check if audio tracks can be re-encoded to Opus
tsx
import {parseMedia} from '@remotion/media-parser';
import {canReencodeAudioTrack} from '@remotion/webcodecs';
 
const {audioTracks} = await parseMedia({
  src: 'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
  fields: {
    tracks: true,
  },
});
 
for (const track of audioTracks) {
  await canReencodeAudioTrack({
    track,
    audioCodec: 'opus',
    bitrate: 128000,
  });
}
Convert an audio track to Opus, otherwise drop it
tsx
import {convertMedia, canReencodeAudioTrack} from '@remotion/webcodecs';
 
await convertMedia({
  src: 'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
  container: 'webm',
  videoCodec: 'vp8',
  audioCodec: 'opus',
  onAudioTrack: async ({track}) => {
    const canReencode = await canReencodeAudioTrack({
      track,
      audioCodec: 'opus',
      bitrate: 128000,
    });
 
    if (canReencode) {
      return {type: 'reencode', audioCodec: 'opus', bitrate: 128000};
    }
 
    return {type: 'drop'};
  },
});
Convert an audio track to Opus, otherwise drop it
tsx
import {convertMedia, canReencodeAudioTrack} from '@remotion/webcodecs';
 
await convertMedia({
  src: 'https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4',
  container: 'webm',
  videoCodec: 'vp8',
  audioCodec: 'opus',
  onAudioTrack: async ({track}) => {
    const canReencode = await canReencodeAudioTrack({
      track,
      audioCodec: 'opus',
      bitrate: 128000,
    });
 
    if (canReencode) {
      return {type: 'reencode', audioCodec: 'opus', bitrate: 128000};
    }
 
    return {type: 'drop'};
  },
});

API​

track​

A AudioTrack object.

audioCodec​

string ConvertMediaAudioCodec

bitrate​

number

The bitrate with which you'd like to re-encode the audio track.

Return value​

Returns a Promise<boolean>.

See also​