Blender Tutorial: Correct A Tilted Video Clip Using The Movie Clip Editor
How to straighten/level a tilting/sloping video clip using Blenders Movie Clip Editor. Blender is one of the best free software/freeware editing packages available for Windows, Linux & Apple.
Link to Blender Beginners Tutorial: Basic Video Editing Using The Video Editor:-
Blender features a fully functional, production ready Non-Linear video editor called Video Sequence Editor or VSE for short. Blender’s VSE has many features including effects like Gaussian Blur, color grading, Fade and Wipe transitions, and other video transformations.