WebCodecs mp4-decode demo using mp4box.js set codedWidth/codedHeight incorrectly #495

 async getConfig() {
    let info = await this.source.getInfo();
    this.track = info.videoTracks[0];

    var extradata = this.getExtradata(this.source.getAvccBox());

    let config = {
      codec: this.track.codec,
      codedHeight: this.track.track_height,
      codedWidth: this.track.track_width,
      description: extradata,
    }

    return Promise.resolve(config);
  }