Real time hardware based non linear horizontal scale (ie 4:3 to 16:9) using the GoPro Superview method (close to it) Click "Clone or Download" and save zip file, extract the .hlsl file
Works in Media Player Classic https://mpc-hc.org/ or similar player supporting HLSL shaders
Watch as SuperView instantaneously.
Instructions,-
Set player to desired ratio, ie 16:9 (Right click, video frame / aspect ratio / 16:9)
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Add realtime-superview-stretch.hlsl to options / shaders (Place effect in Pre-resize)
(You may also use in post-resize for better resampling at hi res but it will sometimes look wrong if not in full screen)
This was inspired by https://github.com/Niek/superview video converter tool, great for processing permanantly
Note: The above image is from a native 16:9 camera, stretched to 235:100, the principal is the same