TheMann58
Second Officer
Flight distance : 18669501 ft
United States
Offline
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JAFARINI,
First - beautiful video and editing job.
With regard to "jello" effect which is a subtle (and sometimes not so subtle) jiggling of narrow horizontal bands of the recorded video file - this is NOT a defect or hardware problem. Jello is caused by a combination of small aircraft/gimbal vibrations COMBINED with the use of a high shutter speed that is many times greater than the capture frame rate of the video recording. In the case of the P4Pro it can capture video in 4K at either 30 fps or 60 fps. To greatly reduce or eliminate video "jello" effect you need to use ND filters (available from DJI and various 3rd parties) on the P4Pro camera lens to reduce the incoming light and, thus, force the camera to use a much slower shutter speed. Ideally, you want to target using a shutter speed of about twice the video capture frame rate. At very high shutter speeds, the video image being captured can change subtly shift left/right many times as the whole frame is captured. Thus, slight shifts in the image caused by aircraft/gimbal vibrations are captured and horizontal bands of the captured image appear to jiggle slightly. Using ND filters enables the use of lower shutter speeds which greatly reduces/eliminates the subtle left-right shifts in the video image that are captured in a single frame of video and, thus, no "jello" effect.
So, if you are shooting 4K video at 60 fps, you want a shutter speed of 1/120th sec. Based on the bright, sunny day you were filming and the abundance of bright, white, reflective snow cover, you would likely have needed an ND32 (or, possibly, an ND64) filter to reduce shutter speed to 1/120th sec. |
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