WEBCODECS_TIMESCALE

warning

@remotion/media-parser 返回所有带有微秒标准化时间戳的样本。这意味着全局时间尺度是 1_000_000。

通过将时间尺度硬编码为 1_000_000，样本可以直接传递给 EncodedVideoChunk 和 EncodedAudioChunk，它们期望输入以微秒为单位。

🌐 By hardcoding the timescale to 1_000_000, the samples can be directly passed to EncodedVideoChunk and EncodedAudioChunk, which expect the input to be in microseconds.

WEBCODECS_TIMESCALE 常量已导出：

🌐 The WEBCODECS_TIMESCALE constant is exported:

Using WEBCODECS_TIMESCALE
import {WEBCODECS_TIMESCALE} from '@remotion/media-parser';

const timescale = WEBCODECS_TIMESCALE; // 1_000_000

要获取样本的时间（以秒为单位），可以将时间戳除以 WEBCODECS_TIMESCALE 常量。

🌐 To get the time in seconds of a sample, you can divide the timestamp by the WEBCODECS_TIMESCALE constant.

Getting the native timescale
import {parseMedia, WEBCODECS_TIMESCALE} from '@remotion/media-parser';

const result2 = await parseMedia({
  src: 'https://remotion.media/video.mp4',
  onVideoTrack: ({track}) => {
    return (sample) => {
      const timeInSeconds = sample.timestamp / WEBCODECS_TIMESCALE;
      console.log(timeInSeconds);
    };
  },
});

获取本地时间尺度

🌐 Getting the native timescale

如果你对音轨的原生时间尺度感兴趣，可以从 originalTimescale 属性获取。并非所有的容器格式都支持这一点，有些可能会返回 1_000_000。

🌐 If you are interested in the native timescale of a track, you can get it from the originalTimescale property.
Not all container formats may support this, some may return 1_000_000 instead.

Getting the native timescale
import {parseMedia} from '@remotion/media-parser';

const result2 = await parseMedia({
  src: 'https://remotion.media/video.mp4',
  onVideoTrack: ({track}) => {
    console.log(track.timescale); // 1_000_000, always
    console.log(track.originalTimescale); // 12800
    return null;
  },
});

获取本地时间尺度​

获取本地时间尺度