MOI (file format)

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MOI

Filename extension	.moi
Type of format	Information

MOI is a computer

files whose content they represent. They are mainly used on JVC and Canon camcorders.

Format overview

Hex offset (zero based)	Content	Example
00-01	Version	56 36 (V6)
02-05	MOI filesize (bytes)	00 00 01 C3 (451 bytes)
06-07	Year	07 D9 (2009)
08	Month	06 (June)
09	Day	1E (30th)
0A	Hour	0B (11)
0B	Minutes	16 (22)
0C-0D	Seconds	CB 20 (52000 milliseconds = 52 seconds)
0E-11	Video duration (ms)	00 08 9D 00 (564480 ms, 9 mn 24 s 12 frames)
80-83	Video aspect ratio and TV system	Low nibble of first byte: 0 and 1 for 4:3, 4 and 5 for 16:9. High nibble of first byte: 4 for NTSC, 5 for PAL.
84-85	Audio codec	00 C1 for AC3 audio / 40 01 for MPEG audio
86	Audio bitrate	01 = 64kbit/s (in steps of 16 kbit/s) to 0F = 640kbit/s
DA-DB	Video bitrate	58 96 = CBR 8.5 Mbit / 81 3D = CBR 5.5 Mbit
DD-E1	Video duration packets	Video duration (ms) (0E-11) * 5A + Video bitrate (DA-DB) (may be incremented with values at offset DA-DB, but may not be for VBR MPEG video)
E6-E7	Video bitrate	Same as at offset DA-DB
E9-ED	Video duration packets	Same as at offset DD-E1
F0-F1	COARSE table entries (zero based)	Count of 7 byte packets for coarse table (one 7-byte packet each 10 seconds)
F2-F3	FINE table entries	Count of 3 byte packets for fine table (one 3-byte packet each 480 milliseconds)
100 -	COARSE table	(F0-F1) * 7 byte packets coarse table
-	FINE table	(F2-F3) * 3 byte packets fine table