Video Stream become Black screen if not using WIFI

Help
1

Hi everyone, I just faced an issue on when trying to connect between the devices, if I using the same network with WIFI it running well all devices that connected can see each device that connected,
but if I change the network like using Mobile Data Plan, and the others using wifi, the one that using Mobile Data Plan just showing a black screen for a video that streamed and also in another device, it will show a black screen

the case:
#1
DEVICE 1 : USING WIFI (Same Networks)
DEVICE 2 : USING WIFI (Same Networks)
DEVICE 3 : USING WIFI (Same Networks)
this will be running well

#2
DEVICE 1 : USING WIFI
DEVICE 2 : MOBILE DATA PLAN
DEVICE 3 : MOBILE DATA PLAN
2,3 device will show a black screen

this show that showing running perfectly because use the same networks and WIFI

photo_2020-05-01 12.09.14
photo_2020-05-01 12.09.141280×590 64.8 KB

this is pict that showing a black screen, at the bottom left, it should show video stream from another peer

photo_2020-05-01 15.11.42
photo_2020-05-01 15.11.421280×590 56.3 KB

the getting offer and sending answer was logged same,

what things can be caused this issue? is that because of the signaling server? or ISP ? or firewall? or just my code? still cannot get the real issue of this.

Thanks a lot

2

I had similar issue using mobile data. Anyone can help us on this?

3

Best bet would be to use a STUN and TURN server.
Some mobile networks can be overly unpredictable.

4

I’m already using TURN server connection through numb.viagenie.ca but I’m still getting a black screen and I see no errors on degub console. Any help would be greatly appreciated.

5

It seems that WEBRTC peer connection only works if both devices are connected on the same network. How can we resolve this problem?

6

ya bro, ive changed it, and now its running well

7

you can try this one for testing and development purpose
hi @bcgoodmate i just fixed this issues with changing our STUN and TURN server, you can try this public server

  webex_config: {
    iceServers: [
      {urls: 'stun:stun.l.google.com:19302'},
      {
        url: 'turn:numb.viagenie.ca',
        credential: 'muazkh',
        username: 'webrtc@live.com',
      },
    ],
  },
1 Like
8

Wow. It worked. Thank you so much.

I found that sample earlier but never tried it as thought it’s an outdated one. Instead I created my own by registering it here https://numb.viagenie.ca/cgi-bin/numbacct but I wonder why it doesn’t worked when in fact the only difference is the credential and username and it also passed when I tested it on https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice. Did I missed some important configuration? Hmmm…