Simple colour correction in Avisynth?

[MasterTape]

I've been wanting to improve the colours on my captured videos for a while now as feel like they are a bit muted and dull, but then Panasonic VCR's have pale colours but i like the image quality best out of other VCRs. I don't have a clue how to work the proc-amp on my Datavideo TBC-3000, and colour correcting in Avisynth seems a bit complex, i don't know where to begin.

I know there's probably many different ways of doing it, i just want something similar to SmoothTweak where i can work with a histogram and adjust the colours without clipping them.

https://i.imgur.com/X9n5894.png

I just need something for more general use which i can safely apply across an entire clip to make the colours look a bit better, without having to adjust it for each shot (i'll only really do that with footage i deem more important) as got hundreds of tapes to go through and it's time consuming. I don't mean something automatic, but something i can adjust to keep it within the safe range, and i would skim through the clip/histogram to monitor any clipping, like i do with SmoothTweak.

[johnmeyer]

StainlessS' "GamMac" can sometimes do auto color correction. Give it a whirl.

However, trying to get automatic color correction across scenes is not likely to give you a great result. There are just too many variable as you go indoors then outdoors, bright and dark, stage lighting, and so on.

You also have to remember that most of the color in VHS video simply isn't there, especially with NTSC tapes. You can't improve what isn't there.

[Bernardd]

Perhaps, you can try this script to have a automatic mod with Stainless's RGBAdapt plugin.
https://www.dropbox.com/s/1f2gb2u8dncw6bv/RGBAdapt_Awb_Process%2032%2064%20bitsv%202023%20juin.7z?dl=0