Kdenlive/Manual/Clip Menu/Stabilize
Stabilize
This menu item is available from right click on a clip in the project tree or under the project menu when a clip is selected in the project tree.
This feature applies image stabilization algorithms to the clip which can reduce the shakiness of a shaky bit of footage.
stabilize ( vstab)
This tutorial shows how to use the stabilize feature - vstab version:
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The "shutter angle" setting that the narrator says he does not know what it does (1:35) ... Shutter angle is an angle that images could be maximum rotated for stabilization. see here.