text: BoxParser.tkhdBox.prototype.write = function(stream) {
  	this.version = 0;
  	//this.flags = 0;
  	this.size = 4*18+2*4;
  	this.writeHeader(stream);
  	stream.writeUint32(this.creation_time);
  	stream.writeUint32(this.modification_time);
  	stream.writeUint32(this.track_id);
  	stream.writeUint32(0);
  	stream.writeUint32(this.duration);
  	stream.writeUint32(0);
  	stream.writeUint32(0);
  	stream.writeInt16(this.layer);
  	stream.writeInt16(this.alternate_group);
  	stream.writeInt16(this.volume<<8);
  	stream.writeUint16(0);
  	stream.writeInt32Array(this.matrix);
  	stream.writeUint32(this.width);
  	stream.writeUint32(this.height);
  }
  
  