Refer the instruction manual for detailed infomation.
2.5.JPEG File Format Sent Out by the camera
JPEG file from the camera is JFIF compliant and consist of the following.
FFD8 | Start Code |
FFE0 | Application Segment |
FFFE | Comment Segment 1 |
FFFE | Comment Segment 2 (reserved) |
FFC4 | DHT Huffman Table |
FFDB | DQT Quantization Table |
FFDD | DRI Restart Interval |
FFC0 | SOF Frame Information |
FFDA | Data Start Segment |
FFD9 | End Code |
The following information is stored in the comment segment 1. Each item has a fixed length.
Item | Size | Example |
| Note |
Version Information | 9 | JVC V1.0 |
| Indicates the version of information stored in the |
|
|
|
| comment segment. |
File Size | 18 | size = 123456 |
| Indicates JPEG size in bytes. |
Width | 13 | width = 1920 |
| Width of JPEG. |
Height | 14 | height = 1080 |
| Height of JPEG. |
Model Name | 18 | type = |
| Name of model that created the JPEG. |
(reserved) | 12 | reverse = 0 |
| (reserved) |
Time Stamp | 70 | timestamp | = | Indicates the time when the JPEG is created. This is |
|
| 2012030623341253 | made up of the year/month/day, hour/minute/second, | |
|
| 8UTC |
| millisecond and timezone code. |
|
|
|
| |
(reserved) | 13 | alarm = 00000000 |
| (reserved) |
Camera ID | 50 | camera = input01 |
| Stores camera information set at |
Motion Detect Setting | 11 | motion = 1 |
| Specified as 1 when the motion detect is ON. |
Motion Detect Result | 7 | md = 1 |
| Specified as 1 if motion is detected at the time when |
|
|
|
| JPEG is created. |
Tampering Detect | 14 | tampering = 0 |
| Specified as 1 if tampering is detected at the time when |
Result |
|
|
| JPEG is created. |
Pan position | 16 | digipan = 123 |
| Indicates pan position in pixels from 0 to 1278. |
Tilt position | 17 | digitilt = 123 |
| Indicates tilt position in pixels from 0 to 958. |
Zoom position | 17 | digizoom = 1.23 |
| Indicates zoom value from 0.25 to 8.00. |
Preset Posision | 15 | position = 19 |
| Indicates preset position number after moving to |
Number |
|
|
| preset position. In other cases, position = NA. |
Item names and values, excluding the version information that does not include =, are stored in the following
format.
name
space
=
space
value
(stuffed with 0x00)
fixed length for each item
10
