Quick game play capture test sample running OBS Studio on Windows 11 using the Retrotink 5X and AverMedia Live Gamer 4K capture card.
OBS Studio set to capture at 1440p and the output from the Retrotink 5X set to 1220p.
Original Sega Genesis (model 2) console connected via RGB Scart.
No Scanlines.....
...
https://www.youtube.com/watch?v=q11UcsXWk_0
Original Sega Genesis (GEN1)
RGB SCART Cable
1440p Game Play Capture
OBS Studio (RGB) "Lossless AVI capture"
Elgato HD60 Pro
RetroTink 5X (Settings used below for the Tink 5X)
Input: SCART RGB
OUTPUT: 1080p (FILL)
H.Sampling: Generic 4:3
Interpolation: SHARP
Scanlines: Polyphase 50%
V.Sync: Triple Buffer
Deinterlace: Motion Adaptive
Y/C Filter: Notch
Colorspace: RGB FULL
SDTV LPF: ON
...
https://www.youtube.com/watch?v=GO-FNHZHfd4