B4 Video Return
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
Camera, click on
- Create your camera as usual, here I used a Dreamchip AtomOne
- Add your lens as usual, here I used
B4 Genericon my CI0-12-137, port 2
You can find more information:
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
You can find more information on various switcher/router integration here.
Ensure the link is working, the block should be green:
Lens buttons link
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
Search for ATEM switcher (
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 :
- In this example:
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
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.