This readme helps you output RTSP stream to a virtual webcam device using FFmpeg. Once you've completed the steps in the document, you can use your preferred video conferencing software to stream the video feed from the camera without granting direct access to the RTSP feed. This can be useful for situations where you want to show outside spaces to friends or family without giving them direct access to the camera's feed.

Please note that this script is for informational purposes only and should be used in compliance with all applicable laws and regulations, and in good faith.

First, we need to install Motion, which is a software package that can capture and process video streams from cameras.

sudo apt update
sudo apt install motion

Next, we need to obtain RTSP credentials. You can find instructions for doing this on the manufacturer's website or by contacting your sysadmin.

After installing Motion, we need to edit its configuration file to add the RTSP stream as a video source. The configuration file is located at /etc/motion/motion.conf, and you can edit it using a text editor such as nano.

sudo nano /etc/motion/motion.conf

Add the following lines to the configuration file, replacing username and password with the credentials you want to use to access the stream:

stream_port 8081
stream_localhost off
stream_authentication username:password

Save the file and exit the editor.

We can now start Motion to capture the video stream.

sudo service motion start

You should now be able to access the camera's video stream from the Ubuntu tower by opening a web browser and navigating to http://localhost:8081. You will be prompted to enter the username and password you configured earlier.

To output the DVR's feed to a virtual webcam device, we need to install v4l2loopback. This package creates a virtual video device that you can use as a webcam input in your streaming app.

sudo apt install v4l2loopback-dkms
sudo modprobe v4l2loopback

Finally, we can use FFmpeg to capture the video stream from Motion and output it to the virtual webcam device.

ffmpeg -i http://localhost:8081 -pix_fmt yuv420p -f v4l2 /dev/video0

This command tells FFmpeg to capture the video stream from Motion and output it to the virtual webcam device /dev/video0. You can then select /dev/video0 as your webcam input in your streaming app.

Note: Make sure to customize the script by replacing username and password with your own credentials, and adjust the configuration settings as needed for your specific use case.

This script is released under the MIT License.