JVC VN-V686UAPI - Manual (Page 9)

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 = 640 Width of JPEG.
Height 14 height = 480 Height of JPEG.
Model Name 18 type = VN-V686U Name of model that created the JPEG.
(reserved) 12 reverse = 0 (reserved)
Time Stamp 70 Timestamp =
2007101413050912
3UTC Indicates the time when the JPEG is created. This is made
up of the year/month/day, hour/minute/second, millisecond
and timezone code.
(reserved) 13 alarm = 00000000 (reserved)
Camera ID 50 camera = input01 Stores camera information set at VN-V686.
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.
Pan position 13 pan = 123.45 Indicates pan position in degrees from 0.00 to
359.99.
Tilt position 14 Tilt = 123.45 Indicates tilt position in degrees from 0.00 to
190.00.
0.00 corresponds to -5 degrees and 190.00
corresponds to 185 degrees. 5.00 and 185.00 mean
horizontal.
Zoom position 13 zoom = 12.34 Indicates zoom position from 0.00 to 99.99. EZoom
starts from about 90.89.
Preset Posision
Number 15 position = 99 Indicates preset position number after moving to
preset position
. In other cases, position = NA.
Stabilizer status 15 stabilizer = 0 Indicates status of stabilizer . 1 means that stabilizer is
on.
Fan status 8 fan = 0 Indicates status of fan . 1 means error.
Intelligent tracking
status 17 track_status = 0 Indicates status of Intelligent tracking . 0 means
completed, 1 means waiting for specifying target, 2 means
tracking, and 3 means losing.
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