There are different Timing methods around. They are listed from most to less recommended.

* RTA Segmented. Real Time Attempt Segmented this is accurate but takes extra work. First Frame after transition where you can do gamepad inputs till the Frame you grab orb or leave the stage.

* RTA Split. Here you need to explain how you split since every runner might do this different. A good split might go from Health refill after the Orb grab to the next one. Frame counting is also just possible with a good 60 fps Source Video.