Restoring badly digitized VHS

[Selur]

So, I'm still a little puzzled about the difference between the ffmpeg/hybrid approach vs pure hybrid/vs.

I think it comes down to rounding / interpolation differences, which is what I tried to 'simulate' with the up and down scaling.
To know for sure, one probably have to look at what exactly ffmpeg is doing (in detail; debug log level might work) and maybe even crawl through the source. (at least I won't do that )

Cu Selur