Nofile Mp4 Info

00 00 00 XX 66 74 79 70 ... (where XX = box size, ftyp = ASCII identifier)

00 00 04 8C 6D 64 61 74 ... (where 6D 64 61 74 = mdat ) nofile mp4

00 00 00 18 66 74 79 70 69 73 6F 6D