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canReencodeVideoTrack()

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 VideoTrack，确定它是否可以重新编码到另一条轨道。

🌐 Given a VideoTrack, determine if it can be re-encoded to another track.

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

🌐 You can obtain a VideoTrack using parseMedia() or during the conversion process using the onVideoTrack callback of convertMedia().

示例​

🌐 Examples

Check if video tracks can be re-encoded to VP8
import {parseMedia} from '@remotion/media-parser';
import {canReencodeVideoTrack} from '@remotion/webcodecs';

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

const videoTracks = tracks.filter((t) => t.type === 'video');

for (const track of videoTracks) {
  await canReencodeVideoTrack({
    track,
    videoCodec: 'vp8',
    resizeOperation: null,
    rotate: null,
  });
}
Convert a video track to VP8, otherwise drop it
import {convertMedia, canReencodeVideoTrack} from '@remotion/webcodecs';

await convertMedia({
  src: 'https://remotion.media/BigBuckBunny.mp4',
  container: 'webm',
  videoCodec: 'vp8',
  audioCodec: 'opus',
  onVideoTrack: async ({track, resizeOperation, rotate}) => {
    const canReencode = await canReencodeVideoTrack({
      track,
      videoCodec: 'vp8',
      resizeOperation,
      rotate,
    });

    if (canReencode) {
      return {type: 'reencode', videoCodec: 'vp8'};
    }

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

应用编程接口​

🌐 API

track​

一个 VideoTrack 对象。

🌐 A VideoTrack object.

videoCodec​

字符串 ConvertMediaVideoCodec

🌐 string ConvertMediaVideoCodec

支持的视频编解码器之一："vp8"、"vp9"。

🌐 One of the supported video codecs: "vp8", "vp9".

resizeOperation​

你想要应用的调整大小操作。

🌐 The resize operation you would like to apply.

rotate​

你想要应用的旋转操作。

🌐 The rotate operation you would like to apply.

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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