Deploy webrtc on rpi 4

Product support balenaOS
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1

hello i try to deploy a angular server on a rpi4 but i have a problem with a webrtc feature
but when i deploy my server i have an error “navigator.mediaDevices” is undifined

FROM balenalib/%%BALENA_ARCH%%-node:14-buster-run

WORKDIR /usr/src/app

RUN npm install -g angular-http-server

COPY . ./

CMD ["npm", "run", "start:prod"]

my command in package.json :
"start:prod": "angular-http-server --path dist/front"

Do you have any idea
i can send you more information

2

Hi thomiyi

Have you allowed the browser to use your camera in the settings for webrtc?

Do you see undefined in a simple html/js page, without angular if you enter something like this?

async function getMedia(constraints) {
let stream = null;

try {
stream = await navigator.mediaDevices.getUserMedia(constraints);
/* use the stream /
} catch (err) {
/ handle the error */
}
}

It should only work with https or localhost otherwise will error, you can test if this is the issue with:
chrome://flags/#unsafely-treat-insecure-origin-as-secure
or this: Enabling the Microphone/Camera in Chrome for (Local) Unsecure Origins | by Scott Carmichael | Medium

Do you know which webrtc adapter you are using? GitHub - webrtc/adapter: READ ONLY FORK: Shim to insulate apps from spec changes and prefix differences. Latest adapter.js release:

4

yes it work localy

i have this :

let stream = await navigator.mediaDevices.getUserMedia({video: true});
    stream.getTracks().forEach(track => {
      screen.pc.addTrack(track, stream)
    });

maybe it’s because i don’t use https, but how can i activate it?

5

Hi
That’s good it works locally.
Do you have the PUBLIC DEVICE URL enabled in the dashboard? That should be https…
Did you add that URL to cors whitelist?

6

I can Send you the public IP tomorow
An what whitelist?
I have cors whitelist on my nodejs server and it works well, angular and nodejs communicate When it deploy

7

Hi you may need add *.balena-cloud.com to your allowlist Network Setup on balenaOS - Balena Documentation.
Let me know if that resolves it.

9

Hi
Did you get your webrtc setup to work with public IP?
Thanks!