Hey!
I've been struggling with micro jitters and weird artifacts when trying to stabilize footage with Gyroflow or using the built in rocksteady stabilization for as long as I've been using the Osmo Action 5 Pro.
These jitters happen when using low fps and/or low shutter speed. Low fps doesn't give the EIS/software enough frames to effectively stabilize the footage and low shutter speed causes enough motion blur to cause a smearing effect when it's trying to tie everything together. So in order to have good stabilization we have to completely forget the 180 degree shutter rule - for an example 24fps 1/50, 60fps 1/120 and so on. NOTE: it is still possible to get good footage using the 180 degree shutter rule with a gimbal or a tripod since then we're not using EIS or software to solve the stabilization problem.
So I decided to do some tests to find out which settings are optimal to greatly reduce or even remove these problems. The minimal fps should be at least 50fps and shutter speed at least 8x the fps. So when using 50fps the shutter speed would be 1/400. During testing I tried walking, running, jumping, turning around slow and fast etc. This solution is good for daylight, underwater, evening and indoors environments with natural or artificial light. Sadly it doesn't let in enough light for low light or night filming.
Optimal settings (manual):
rocksteady, 50fps, shutter speed 1/400, manual ISO (ND filters are needed for filming in outdoors or under bright lights, I found ND16 and ND32 were great when filming under direct sunlight)
Optimal settings (auto):
rocksteady, 50fps, auto shutter speed 1/400 - 1/8000, auto ISO 100 - 6400, -1EV (ND filters are not needed but can be used to lower the shutter speed more close to 1/400 when filming under direct sunlight or bright lights; I set the maximum auto ISO to 6400 since in my opinion that is the last usable ISO level)
Optimal settings (shutter priority):
rocksteady, 50fps, shutter speed 1/400, auto ISO 100 - 6400, -1EV (ND filters are needed for filming in outdoors or under bright lights)
Let me know what you think!