- Posts: 3
- Joined: Tue Sep 04, 2018 2:39 pm
- Real Name: Stefano Gasparini
Well all depends on your complete chain of hardware.
Semi pro cameras have about 1 to 3 frames latency, Prosumer camera's and DSLR's can easily have up to 8 frames of latency in there video..
The Atem has 1 frame latency because of the Framebuffer. (Or 2 if you are going to use the DVE).
You screen depending on that it is.. (Ledwall, LCD's, Beamer) if any scaling is happening because the input resolution is not the Native resolution will add latency.. A beamer in most cases will add 3 - 5 frames latency!
In 50Hz every frame is 20 milliseconds 1/50=20 In 60hz every frame is 16 ms..
So to count up for example 50Hz setup..
Camera 1 to 8 frames = 20ms to 160ms
Atem 1 frame = 20ms
Screen 2 to 6 frames = 20ms to 140ms
So the Atem isn't that bad in latency..
If you are going to use proffesional cameras that can be Genlocked to a BlackBurst or Trilevel sync you can even scratch the 1 frame of the Atem is setup correctly. Because you don't use the Frame buffer due to the Genlocked sources..
Also most proffesional cameras that will Genlock have a Latency of maximum 1 frame!!
So a lot to gain if you are going to use proffesional broadcast cameras all genlocked to a genlock generator.