WEBCODECS_TIMESCALE

@remotion/media-parser returns all samples with normalized timestamps in microseconds.
This means the global timescale is 1_000_000.

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.

The WEBCODECS_TIMESCALE constant is exported:

Using WEBCODECS_TIMESCALE
tsx
import {WEBCODECS_TIMESCALE} from '@remotion/media-parser';
 
const timescale = WEBCODECS_TIMESCALE; // 1_000_000

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

Getting the native timescale
tsx
import {parseMedia, WEBCODECS_TIMESCALE} from '@remotion/media-parser';
 
const result2 = await parseMedia({
  src: 'https://parser.media/video.mp4',
  onVideoTrack: ({track}) => {
    return (sample) => {
      const timeInSeconds = sample.timestamp / WEBCODECS_TIMESCALE;
      console.log(timeInSeconds);
    };
  },
});

Getting the native timescale

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