MOI (file format)
| Filename extension |
.moi |
|---|---|
| Type of format | Information |
MOI is a computer file format used primarily to represent information. MOI files are associated with MOD or TOD 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 | in miliseconds CB 20 (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 16kbit/s) to 0F = 640kbit/s |
| DA-DB | Video bitrate | 58 96 = CBR 8.5Mbit / 81 3D = CBR 5.5Mbit |
| 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 |
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