Re: [mediacapture-record] Creation of Seekable Files (#119)

A few years have passed and there is still no official solution.
The good solution I've tried so far is this `webm-duration-fix` for those who need it.
It supports fixing recording files larger than 2GB and has a low memory footprint when fixing.
based on ts-ebml，Support browser and node。
https://github.com/buynao/webm-duration-fix

```
import fixWebmDuration from 'webm-duration-fix';

const mimeType = 'video/webm\;codecs=vp9';
const blobSlice: BlobPart[] = [];

mediaRecorder = new MediaRecorder(stream, {
  mimeType
});

mediaRecorder.ondataavailable = (event: BlobEvent) => {
  blobSlice.push(event.data);
}

mediaRecorder.onstop = async () => {  
    // fix blob, support fix webm file larger than 2GB
    const fixBlob = await fixWebmDuration(new Blob([...blobSlice], { type: mimeType }));
    // to write locally, it is recommended to use fs.createWriteStream to reduce memory usage
    const fileWriteStream = fs.createWriteStream(inputPath);
    const blobReadstream = fixBlob.stream();
    const blobReader = blobReadstream.getReader();
  
    while (true) {
      let { done, value } = await blobReader.read();
      if (done) {
        console.log('write done.');
        fileWriteStream.close();
        break;
      }
      fileWriteStream.write(value);
      value = null;
    }
    blobSlice = [];
};
```

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Received on Monday, 17 January 2022 09:58:14 UTC