Trying to follow the instructions here (https://www.linuxjournal.com/content/better-raspberry-pi-streaming-solution) but can't get their repository to work. I'm using stretch on a Pi3.
I changed my /etc/sources.list to include this line; deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch main
Added the key using; curl http://www.linux-projects.org/listing/uv4l_repo/lrkey.asc | sudo apt-key add -
But when I try to run sudo apt-get update I get this error; W: GPG error: http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 978FA72DF442B950 W: The repository 'http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
Can anyone help me with this?