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Camera Client

BerryNet camera client (bn_camera) supports three types of input sources

  • Physically connected camera, e.g. USB camera and Pi camera.
  • Internet camera (IP camera) providing RTSP or MJPEG video stream.
  • Single image for development or debugging.

We will introduce how to use these different types of input sources below.

USB Camera

By default, camera client will use physically connected camera as input source:

$ bn_camera

You can use FPS parameter to control its image decoding rate:

$ bn_camera --fps 5

RPi Camera

The usage of RPi camera is the same as USB camera above.

How to verify PiCamera HW

IP Camera

Before setting RTSP/MJPEG video stream as input source, I recommend to verify that the video stream can be played by a media player (e.g. VLC media player or Totem movie player).

  • If input is RTSP video stream

    $ bn_camera --stream-src rtsp://<stream-rtsp-url> [--fps N]
  • If input is MJPEG video stream

    $ bn_camera --stream-src http://<stream-mjpeg-url> [--fps N]

To get stream URL of an IP camera, please refer to the user manual of your IP camera, or check the camera connection database.

Get Nest Camera's Snapshot URL

Follow the quick start guide to get snapshot URL. The high-level steps are:

  1. Create a "product" (the concept is like a project, we will use it for personal usage).
  2. Get access token from Nest cloud service.
  3. Get snapshot URL with the access token Nest cloud service.

Single Local Image (for Development or Debugging)

$ bn_camera --mode file --filepath <image-filepath>