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canReencodeAudioTrack()

warning

我们正在逐步淘汰 Remotion WebCodecs，并转向 Mediabunny！

属于 @remotion/webcodecs 软件包的一部分.

🌐 Part of the @remotion/webcodecs package.

warning

不稳定的 API：此软件包处于实验阶段。在我们移除此提示之前，API 可能随时更改。

给定一个 AudioTrack，确定它是否可以重新编码到另一条轨道。

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

你可以使用 parseMedia() 获取 AudioTrack，或者在使用 convertMedia() 的 onAudioTrack 回调的转换过程中获取。

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

示例​

🌐 Examples

Check if audio tracks can be re-encoded to Opus
import {parseMedia} from '@remotion/media-parser';
import {canReencodeAudioTrack} from '@remotion/webcodecs';

const {tracks} = await parseMedia({
  src: 'https://remotion.media/BigBuckBunny.mp4',
  fields: {
    tracks: true,
  },
});

const audioTracks = tracks.filter((t) => t.type === 'audio');

for (const track of audioTracks) {
  await canReencodeAudioTrack({
    track,
    audioCodec: 'opus',
    bitrate: 128000,
    sampleRate: null,
  });
}
Convert an audio track to Opus, otherwise drop it
import {convertMedia, canReencodeAudioTrack} from '@remotion/webcodecs';

await convertMedia({
  src: 'https://remotion.media/BigBuckBunny.mp4',
  container: 'webm',
  videoCodec: 'vp8',
  audioCodec: 'opus',
  onAudioTrack: async ({track}) => {
    const canReencode = await canReencodeAudioTrack({
      track,
      audioCodec: 'opus',
      bitrate: 128000,
      sampleRate: null,
    });

    if (canReencode) {
      return {type: 'reencode', audioCodec: 'opus', bitrate: 128000, sampleRate: null};
    }

    return {type: 'drop'};
  },
});

应用编程接口​

🌐 API

track​

一个 AudioTrack 对象。

🌐 A AudioTrack object.

audioCodec​

字符串 ConvertMediaAudioCodec

🌐 string ConvertMediaAudioCodec

bitrate​

number

你希望重新编码音轨时使用的比特率。

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

sampleRate​

数字 | null

🌐 number | null

你希望重新编码音轨的采样率。如果 sampleRate 为 null，则将使用原始音轨的采样率。

🌐 The sample rate with which you'd like to re-encode the audio track. If the sampleRate is null, the sample rate of the original track will be used.

返回值​

🌐 Return value

返回一个 Promise<boolean>。

🌐 Returns a Promise<boolean>.

另请参阅​

🌐 See also

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