static parseTFDT(reader, version) {
    const baseMediaDecodeTime = version == 1 ?
        reader.readUint64() : reader.readUint32();

    return {
      baseMediaDecodeTime,
    };
  }
Parses a TFDT Box.
@param {!shaka.util.DataViewReader} reader
@param {number} version
@return {!shaka.util.ParsedTFDTBox}