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B4 Video Return

Overview​

The goal is to use RET, VTR buttons on B4 lenses to be able to act on the video return from the switcher.

Camera set up​

The first step is to configure the camera and the lens.

Here, I created a Dreamchip AtomOne with a Canon B4 lens:

  • On the web UI Configuration, in Camera, click on +
  • Create your camera as usual, here I used a Dreamchip AtomOne
  • Add your lens as usual, here I used B4 Generic on my CI0-12-137, port 2

You can find more information:

  • on Dreamchip camera setup here.
  • on B4 lens set up here.

Switcher set up​

The second step is to configure the switcher and link my camera (configured above) to the correct input.

Here, I created an ATEM switcher and linked my camera DC to the input 1.

You can find more information on various switcher/router integration here.

Ensure the link is working, the block should be green:

Now, navigate to /dev/app.html. If my RCP is RCP-18-4 and I use the URL: http://10.192.18.4, then it is http://10.192.18.4/dev/app.html

Search for ATEM switcher (CTRL+F)

Click on the title, and you should see a panel on the right:

Set up the B4 video return by changing the field video_return (empty by default):

  • It is a list, separated by ;
  • Each item in this list follows the syntax : output:live_input,program_input,ret1_input,ret2_input
  • In this example: Aux5:1,2,3,4 means:
    • Aux5 : my monitor output on my ATEM
    • 1 : my camera is on input 1, input 1 is displayed when no button is pressed
    • 2 : input 2 is displayed when program button is pressed
    • 3 : input 3 is displayed when RET1 button is pressed
    • 4 : input 3 is displayed when RET2 button is pressed
note

Depending on the switcher, names can differ.

Here on my ATEM, output 5 is named as Aux5, on another router, it could be simply 5.

Refer to the configuration page of the RCP to ensure names match.