[FFmpeg-user] Guide to denoise VHS videos

Carl Zwanzig cpz at tuunq.com
Sun Apr 11 22:59:20 EEST 2021

On 4/11/2021 12:41 PM, Phil Rhodes via ffmpeg-user wrote:
> Did anyone ever write a TBC filter in software?
> It might be a bit dependent on picture content, but it strikes me it
> ought to be possible to do something that would match up the horizontal
> position of rows of pixels by minimising contrast between adjacent
> lines..

I don't know of one, but that doesn't mean too much. I do remember a 
discussion a few years ago with some math/video people about using FFT-based 
frequency analysis to detect horizontal shifting, so it ought to be 
possible; beyond my math skills.



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