Livestreaming webcam through WebSockets

This is a proof-of-concept demo of using WebSockets to stream a video camera feed through WebSockets, so any browser can access it.

At the moment, it is very work-in-progress. The stream is coming in as the raw JPEG binary, which is then read as a blob that's loaded into an Image(), which is then drawn onto an HTML5 canvas.

The latency is about ~0.1s, but with relatively high CPU usage (NEW! Down from ~50% to ~20% CPU usage)

To demo this, make sure you have opencv-python and websockets installed, and you have Python 3.6+.

Demo

1. Ensure you have the prerequisites, try pip install -r requirements.txt
2. Run python server.py
3. Visit localhost:8000 to view the stream. A corresponding window will also be loaded with the current time.

Running this in a Raspberry Pi

This currently works pretty well; I'm noticing ~0.4s latency between frames, but it runs at 30fps otherwise.

To try it out, make sure you have the v4l2 drivers installed. Then, enable it with sudo modprobe bcm2835-v4l2. You can add it at boot by adding bcm2835-v4l2 to /etc/modules.