picam_util

Web streaming utility for the Raspberry Pi camera.

Based on the web streaming recipe in the picamera docs at https://picamera.readthedocs.io/en/release-1.13/recipes2.html#web-streaming.

Installation

• Assuming you're using a standard version of Raspbian OS, you should have the Python picamera module installed by default. If not, see https://picamera.readthedocs.io/en/release-1.13/install.html.
• Enable the camera using raspi-config.
• Save the file web_streaming.py somewhere and make it executable with chmod +x web_streaming.py.

Usage

• On the Raspberry Pi, start the streaming server: ./web_streaming.py
• In your browser, navigate to http://<pi-name-or-ip-address>:8000/

• Use the dropdown to select 640x480 or 1024x768 resolution. Note: Since this utility controls the camera, it is not meant to support multiple simultaneous browser clients.
• Show or hide center crosshairs with the checkbox.
• To calculate actual or required field of view (FOV):
  • enter the distance from the lens to the object being viewed. (The simple chart shown in the screenshot to help with focus and FOV measurements is included in this repository.)
  • enter the total length, horizontally, vertically, or diagonally that you can see/want to be able to see
  • the calculated FOV will be shown in degrees