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Adding Zoom calls to vMix with return video and audio

The below guide will explain how to use vMix and NDI to bring in a Zoom.us caller from another PC or Laptop and also send them a return video and audio feed. This is the recommended method for best performance.
If you would like to add Zoom into vMix from the same computer, then please see the following knowledge base article guide: https://www.vmix.com/knowledgebase/article.aspx/226/adding-zoom-calls-to-vmix-from-the-same-computer


1. Separate laptop or PC running Windows, Zoom, vMix Desktop Capture and vMix Basic HD or higher.
2. Main PC running vMix for your production
3. Both computers should be connected to a Gigabit Ethernet network.



Step By Step

1. Zoom PC
a) Install VB audio cable or Virtual Audio Cable. VB audio cable is free.
b) Install and run the latest version of vMix (vMix 17 or higher required)
c) In Settings -> Audio Outputs set the Master Output to go to the virtual audio cable option
d) In the vMix Audio Mixer turn the headphones control completely off by dragging it down with the mouse
e) Turn on External Output
f) Run vMix Desktop Capture
g) In Zoom set the Video to vMix Video and audio output (microphone) to VB audio cable

h) Zoom will now send whatever is in vMix back to the Zoom caller which we can use as the return feed
vMix can be minimised on the Zoom system once setup, it just acts as a bridge from NDI to Zoom
2. Main vMix PC
Install vMix 17 or later and configure the following settings (below instructions are for vMix 20 and higher):
a) Settings -> Outputs/NDI: Select the NDI button next to Output 1 (where it says Record / Stream / External to the far right) and Audio Outputs. The buttons should then be green and say "NDI On". These are what we will send to the Zoom computer.
b) Settings -> Audio Outputs: Set the "A" bus to "Enabled" to enable it
3. Connecting both PCs together
Zoom PC:

1. Go to Add Input -> NDI and add the "vMix Output" source from the Main vMix PC
2. From the Audio Mixer in vMix drag the volume fader for this input down to 0 to mute it
3. Go to Add Input -> NDI and add the "vMix Audio - A" from the Main vMix PC
4. Make sure the audio for this input is on by checking the Audio button is green
Main vMix PC:
1. Go to Add Input -> NDI and add the "Display 1" input from the Zoom PC vMix Desktop Capture
2. From the Audio Mixer, turn on the "A" button for all audio sources you wish to send back to the caller, this should be all audio sources except for the "Display 1" input you just added.
After completing all the steps above you will now have a Zoom call in vMix with full return feed capabilities for the caller.
You may also want to Crop or Zoom In the Display 1 input in vMix to remove some of the Zoom elements that may appear on screen. 
This can be done by double clicking the Input in vMix and going to the Position tab

Last Updated: Tuesday, 24 March 2020 4:32:00 PM