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vMix Call doesn't work properly - Only from one particular mobile phone it works, all other guests cant connect
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AlliedEsportsEU  
#1 Posted : Thursday, February 25, 2021 10:23:23 PM(UTC)
AlliedEsportsEU

Rank: Newbie

Groups: Registered
Joined: 2/25/2021(UTC)
Posts: 1
Germany
Location: Hamburg
I have a strange problem:

When I set up a vMix call, no guest can connect with their mobile phone (IOS and Android) or with their browser - except for one. It works fine with another Android phone, but not with any other. It does not matter whether the guests are in the vMix network, in the WLAN of another external network or mobile.
The guests, for whom it does not work, see themselves in the call (cam overlay) but otherwise only see a blue screen.

Here are excerpts from the Call Manager's error log:

Quote:
Scar 11:51:59 AM
logged in

Scar 11:52:01 AM
Caller has made initial contact!

Scar 11:52:01 AM
Call Disconnected

Scar 11:52:01 AM
System.Exception: There is a media type mismatch between the local stream at index 0 (Audio) and the media description at index 0 (Video).
at FM.IceLink.Connection.ProcessAndSetDescription(SessionDescription description, Boolean isLocalDescription, Promise`1 promise)
at FM.IceLink.Connection.DoSetRemoteDescription(Promise`1 promise, SessionDescription remoteDescription)

Scar 11:52:01 AM
System.NullReferenceException: Object reference not set to an instance of an object.
at FM.IceLink.Future`1.DoWaitForResult(ManagedCondition condition)
at FM.IceLink.Future`1.WaitForResult()
at PhoenixInstance3.IceLink3Instance.CreateOfferAnswerInternal(Boolean offer)
at PhoenixInstance3.IceLink3Instance.ReceiveOfferAnswer(String json, String peerId)
at PhoenixLibrary.WebRTCSession.MessageThread()

Scar 11:52:04 AM
Microphone turned off.


Quote:
Benny 11:56:20 AM
logged in

Benny 11:56:23 AM
Caller has made initial contact!

Benny 11:56:23 AM
Call Disconnected

Benny 11:56:23 AM
Call Disconnected

Benny 11:56:23 AM
Sending our reply to initiate the call...



Either these error messages (top quote) appear or the status "Sending our reply to initiate the call..." (bottom quote)

In addition, the connection with the functioning guest breaks off as soon as another guest wants to connect - but this may have something to do with the original problem.

The strange thing about this is that the connection over this one phone works without any problems!

Thank you for help!
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DWAM  
#2 Posted : Sunday, March 7, 2021 7:08:43 PM(UTC)
DWAM

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Joined: 3/20/2014(UTC)
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Location: Bordeaux, France

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Make sure to use Chrome browser on your devices.

I suspect a firewall issue, most likely on your router.

https://www.vmix.com/kno...ll-firewall-requirements
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