How to set Keyframe frequency/I-Frame(keyframe) Interval (S) for YouTube & Facebook Live by Oupree IP Video Encoder?

Oupree Video Encoder Settings for I-Frame-keyframe-Interval (S) - YouTube or Facebook Live

What Is A Keyframe?

The keyframe (i-frame) is the full frame of the image in a video. Subsequent frames, the delta frames, only contain the information that has changed. Keyframes will appear multiple times within a stream, depending on how it was created or how it’s being streamed.    

How to set Keyframe frequency/I-Frame(keyframe) Interval (S) for YouTube & Facebook Live by IP Streaming Encoder?

For Facebook,

An I-frame (keyframe) must be sent at least every 2 seconds throughout the stream.

YouTube

Keyframe frequency: Recommended 2 seconds. Do not exceed 4 seconds
 

Keyframe frequency/I-Frame(keyframe) Interval (S)= GOP/FPS. The beolow stream I-Frame Interval (S) then is 2S, that is GOP/FPS=120/60