cam

Cam is a simple IP camera proxy: it polls single-frame JPEG output from one or more IP cameras, and serves the frames out over HTTP in JPEG and MJPEG format.

This was a quick and dirty solution developed for a friend. More serious applications may benefit from ffmpeg, gstreamer, or a dedicated IP camera package.

Build

Clone the source:

$ git clone https://github.com/lnmx/cam
$ cd cam

Build the cam executable:

$ export GOPATH=`pwd`
# Windows: set GOPATH=%CD%
$ go build cam

Configure

Edit config.json to set up the listening port and source cameras, ex:

{
"server": { "addr": "0.0.0.0:8080" },
"sources": [
{ "name": "camera1", "url": "http://camera1/jpeg.cgi" "refresh": 1.5
},
{ "name": "camera2", "url": "http://camera2/jpeg.cgi", "user": "test", "pass": "secret",
"refresh": 1
}
]
}

Include user and pass if the camera requires HTTP basic authentication.

The refresh parameter sets the number of seconds between frames.

Run

Run cam:

$ ./cam
2016/02/02 08:08:08 connecting camera2 to http://camera2/jpeg.cgi
2016/02/02 08:08:08 connecting camera1 to http://camera1/jpeg.cgi
2016/02/02 08:08:08 http server listening on 0.0.0.0:8080
2016/02/02 08:08:08 connected to camera1
2016/02/02 08:08:08 connected to camera2
...

Output URLs are based on the sources/name attribute in config.json. Each camera has a JPEG and MJPEG output. For our example configuration:

• JPEG: http://cam-address:8080/camera1.jpeg
• MJPEG: http://cam-address:8080/camera1.mjpeg