JVC VN-V686UAPI - Manual (Page 6)

When ptz_info=on is specified, boundary, pan/tilt/zoom information and JPEG file will be sent out continuously after
HTTP Response as follows.
Example of Booundary and pan/tilt/zoom information:
--foo<CRLF>
Content-Type: image/jpeg<CRLF>
Content-Length: 31200<CRLF>
X-Puls-Pan: 0<CRLF>
X-Puls-Tilt: 0<CRLF>
X-Posi-Zoom: 0<CRLF><CRLF>
Range of X-Puls-Pan is from 0 to 35999.
Range of X -Puls-Tilt is from 0 to 19000. 0 corresponds to -5 degrees and 19000 corresponds to 185
degrees. 500 and 18500 mean horizontal.
Range of X-Posi-Zoom is from 0 to 9999.
Details of JPEG file format is explained later.
5) When the client wants to stop current JPEG transmission, the client disconnects TCP80.
VN-V686 does not accept further API via current TCP that is used for JPEG transmission. To change parameter,
disconnect current TCP to stop the JPEG transmission, connect new TCP, and send API with new parameter.
6
,,,
HTTP Response
JPEG (No. 1)
JPEG (No. 2)
,,,
boundary
pan/tilt/zoom information
pan/tilt/zoom information
boundary