BoxParser.createFullBoxCtor("trex", "TrackExtendsBox", function(stream) {
	this.track_id = stream.readUint32();
	this.default_sample_description_index = stream.readUint32();
	this.default_sample_duration = stream.readUint32();
	this.default_sample_size = stream.readUint32();
	this.default_sample_flags = stream.readUint32();
});

