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Posts: 13,033

Re: Gopro Hero 7 2.7K60 stabilization problem?

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Your definition of rolling shutter is what is perceived when watching video with rolling shutter but not necessarily what is actually happening. 


Now, first of all, I never said that IT WAS rolling shutter, but that it, "Might be a rolling shutter".


Rolling shutter is the result of not having all parts of the image of the scene being recorded at exactly the same instant. The actual frame by frame can have wobble, skew, spatial ailiasing, and temporal aliasing. Having an image written on the same frame in two seperate locations, especially with high vibration/fast movement/SLOWER SHUTTER, is very common. The "violent shaking" is perceived.  The actual frame by frame shows the horizon doen't shake but is moved by the EIS to compensate for the impact and vibration. The hard impact, fast vibration, and sudden camera movement coupled with a slower shutter, allow for the forground image (arm and phone) to get written on the one frame twice in two seperate locations.  This, plus the actual vibration of the camera and subject, and the camera EIS adjusting the picture location to maintain a stable image, exagerates the "violent shaking". Once this happens, it appears that the camera EIS is trying to regain a stable frame with potentially continued rolling shutter adjustment issues. 


A faster shutter may have helped avoid the image being written twice on the same frame in two locations.


A faster fps (especially if the Auto low light dropped the fps to 30) might have given the EIS more frames to correct itself faster.


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Posts: 48

Re: Gopro Hero 7 2.7K60 stabilization problem?

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All the artifacts in the images above occur because the movement in front of the camera is much faster than the CMOS sensor refresh rate, and is totally non-applicable to the situation described by the OP and those in the other thread I linked.    None of their videos show anything resembling your sample images. 


As I stated  (and you ignored) a rolling shutter does not EVER cause the entire frame to shake violtently at the same time.  In fact, by definition it is not possible because the entire frame is not captured at the same instant.  The only way the whole frame can move at once is if something is messing with it in post processing.. e.g.   Electronic Image Stabilization.

A rolling shutter does not EVER cause just one rectangular block in the same part of the frame to show something different than the entire rest of the frame over time, and for multiple cameras. 

Your assertion that it "might be a rolling shutter" is simply false, and only serves to obfuscate the true nature of the problem.