It's on by default and set to
15 if only using OBS and if using the VP8/VP9 video codec
There is a bug in OBS where the VP8 codec (default in most cases) does not handle packet loss events. This function attempts fixes its.
You can disable this 'fix' by passing it the value
When on, it will trigger a keyframe request to combat pixel smearing caused by packet loss and poor network conditions
Triggers around every 3-seconds if needed; may not activate often with very light packet loss.
May lower video quality, or may not be desirable, so this flag lets you disable it.
Stream pushers can open the debug/stats menu and manually send keyframes also.
VP9 is far less prone to packet loss issues, but it can still happen with heavy packet loss.
Increasing the integer value passed to
&obsfix will reduce the frequency and sensitivity of the keyframe request.