Wrong colors on raspberry pi 4 with composite-NTSC connection

[IGA]

Hello!
I use Raspberry pi 4 connected via composite to old crt-tv.
But i have a problem with running recalbox in NTSC mode (sdtv_mode=0 in config.txt).
My tv has 4 color modes: pal, secam, ntsc 4.43, ntsc 3.58.
So when i set ntsc 4.43 on tv - i've got "wrong" colors in recalbox ( green not green, purple not purple and etc.... ).
When i set ntsc 3.58 - i'v got just black-white-colored picture on display.

When run in PAL (sdtv_mode=2), all colors are fine, but i didn't want to play at 50hz, that's equaled 50 fps by emulators and all my roms are NTSC.

When i'v set pal 60 (sdtv_mode=3 in config.txt) - got black-white-colored picture too. But my tv has 60hz support:

So, i've need some "color fix" ....

As example, for retropie i've found this solution: twekwec and it's worked! But it's need phyton installed on the system. so it's unable on recalbox....

[Zing]

@IGA I do not know if there is any kind of solution for this, I have never seen this situation, check if there is anything in the documentation that will help you:
https://recalbox.gitbook.io/documentation/tutorials/video

[IGA]

First i supposed that is just problem of my TV, but after experiments with retropie' tweakwec found out that this is a some programm issue, and I don't think I'm the only one who's experienced this, cause:

*The default NTSC and PAL modes are enough for most cases where you might want to output composite video, but the Pi's video encoder is actually capable of much more than that.

PAL-M was always broken in the official firmware, and things like PAL60 were never implemented properly, either. The Pi can do both of these, and even SECAM turned out to be implemented in hardware.

Why?
The factory NTSC and PAL modes cover most typical cases for a composite output. So why you might want to use this tool?

On a display that supports it, PAL60 and/or NTSC 4.43 may produce sharper image than regular NTSC, while retaining the 60 Hz 480i or 240p raster favoured by retro enthusiasts.
You may some old sets from e.g France or Russia that only supports SECAM, or from Brazil that only supports PAL-M. tweakvec lets you revive such sets without hardware mods - although the video quality will generally be worse in those modes compared to regular PAL or NTSC.
Even if you don't need any of these special modes, tweakvec gives you access to some additional settings, such as setting horizontal position of the image, and relative horizontal position of luminance and chrominance signals.*

[IGA]

@Zing
to be understood
just make poor-bad photos of screen on cell phone, but even that we could see that colors in NTSC mode incorrect:

And there "same" pictures in PAL (sdtvmode=2), and we see right-true colors:

And so i want to be able run games with right colors (like normal PAL) but with 60 fps ~ 60 Hz and without letterboxing effect (as usual use in pal) when we get blak borders on top and bottom of screen and image is horizontally smaller

[IGA]

or maybe somehow can just install Python 3.7 on the recalbox to use tweakwec??