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Live video stream of your aquarium with a raspberry pi and a Logitech c920

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Raspberry Pi c920 Fishcam

This program serves a live video feed into my home aquarium over a web service.

The video itself comes from a Raspberry Pi with an attached webcam. The video feed is already encoded in H.264 and arrives via an RTP/TCP stream created by GStreamer on the Raspberry Pi.

Currently, the Raspberry Pi is the server of the stream. You must point the web service at it via a command line argument.

To obtain the code, run the following command:

$ git clone https://github.com/ereyes01/fishcam.git

HTTP Stream Server

Make sure you have the following dependencies installed:

$ sudo apt-get install gstreamer-tools gstreamer0.10-ffmpeg gstreamer0.10-gconf gstreamer0.10-plugins-bad gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly
$ pip install tornado

For the Python stuff, it is strongly recommended that you use a virtualenv.

Take note of your camera / Raspberry Pi's IP address.

You can execute the server by running:

$ python streamer.py --camera_ip=192.168.0.5

Replace the IP above with your Raspberry Pi's IP address. The service's logs will appear on stdout.

You can also read about all the available options by printing the help message:

$ python streamer.py --help

Raspberry Pi

The raspberry-pi subdirectory contains the code that runs on the Raspberry Pi. It isn't much as you can see. The main files are:

  • capture.c: Reads H.264 bits from the Logitech c920. This code is a slightly tweaked version of the one from csete's bonecam

  • video-server This script initializes the camera and creates a video stream out of the video feed collected by the capture program. This is also derived from csete's bonecam.

Ideally, this should be packaged into a deb or something. That is a future work item.

Follow these steps to deploy this program onto your Raspberry Pi (my system is running Raspbian):

Copy the code onto your Raspberry Pi:

$ tar -cf - ./raspberry-pi | ssh pi@192.168.0.5 "tar -xvf - && mv raspberry-pi webcam"

Replace the IP above with your Raspberry Pi's IP address.

V4l / Gstreamer Dependencies:

$ sudo apt-get install libv4l-dev v4l-utils gstreamer-tools gstreamer0.10-ffmpeg gstreamer0.10-gconf gstreamer0.10-plugins-bad gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly

The capture.c program must be built with an ARM C compiler. Since it is so small of a program, the simplest way to build it would be on the Raspberry Pi itself. Installing gcc is simple:

$ sudo apt-get install gcc

... then to compile a binary for capture.c:

$ cd ~/webcam
$ gcc -O2 -Wall `pkg-config --cflags --libs libv4l2` capture.c -o capture

To start the video feed from the Raspberry Pi, run the following commands:

$ cd ~/webcam
$ ./video-server 0.0.0.0 4000

That will start a server that the web service can connect to. The LED on the camera should light up blue if this is working. This server needs to be running on the Raspberry Pi in order for the web service to work.

Now, with your Tornado server and your Raspberry Pi streaming video, you can watch your video feed on the browser by visiting:

http://localhost:9090/fishcam.html

Hope these instructions help you get up and running!

Please open an issue if you're having trouble, or if you've found that I broke something.

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