while (true) {
				int isft = avi.readUnsignedByte();
				if (isft == 73) {
					isft = avi.readUnsignedByte();
					if (isft == 83) {
						isft = avi.readUnsignedByte();
						if (isft == 70) {
							isft = avi.readUnsignedByte();
							if (isft == 84) {
								found = true;
								System.out.println("found!");
								
							}
						}
					}
				}
				i++;
			}