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NDI Input Freeze - all NDI Inputs freeze in Vmix after a long period of time
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Thomas K  
#1 Posted : Friday, November 14, 2025 4:27:55 AM(UTC)
Thomas K

Rank: Newbie

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Joined: 11/14/2025(UTC)
Posts: 2
Germany
Hello my fellow vmix users,

we've just had a rare problem with vmix. Our 4 NDI inputs in vmix froze. In the NDI Monitor it still worked fine. We tried to readd the inputs in vmix but they didnt show. If we readded them in the FEIM mode they worked again and did not crash again.

We are using the newest vmix version 29
Other Specs:
Hardware Coding 5070 TI
NDI Version 6.2.1

This problem has never occured in vmix 28.

Does anyone have an idea what this could cause this.

Thank you in advance!

Thomas K.
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mavik  
#2 Posted : Monday, November 17, 2025 7:14:32 AM(UTC)
mavik

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What Windows Version. And how did you receive the NDI streams. TCP, UDP, RUDP, Multicast?
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Thomas K  
#3 Posted : Tuesday, November 18, 2025 3:08:27 AM(UTC)
Thomas K

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Posts: 2
Germany
Thank you for asking. I used the newest Windows 11 Pro Version 25H2. Unicast on all cameras. I checked what protocol the cameras were using. 3 were set to UDP (Avonic CM70) , 1 was streaming in TCP (Panasonic AW HE145). Thank you for your help in advance.
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mavik  
#4 Posted : Tuesday, November 18, 2025 7:11:35 PM(UTC)
mavik

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Usually I would recommend NDI ofer UDP. BUUUUT. Windows f..ed up something in the network layer and the safest ist switching to TCP currently. So first attempt is changing from UDP to TCP and check in the vMix stats if you loose packets and in what quality they arrive. (The changing numbers. 25fps shout result in 40's or values close by).
If this does help you need to tell more of the entire network setup.
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