Enhancing Composite RCA Graphics of Mario Kart 64 (N64) on a 4K Monitor


Hello everyone! I currently have two N64 consoles, one European and one Japanese, but they haven’t been RGB modded, and I don’t plan on doing it myself. Instead, I decided to try another method using video processing. However, I didn’t opt for the Framemeister due to its limited availability and high import costs in my country. Instead, I made use of the tools I already had: the OSSC (Open Source Scan Converter) and the Denon AVR-X2700H.

OSSC+OSSC AddonBoard
RCA input
RGB output (component/scart)

To connect my consoles, I used the following setup:

  1. OSSC with OSSC Addon Board
  2. Input via RCA
  3. The RCA signal is then converted into RGB using the OSSC.
  4. From the OSSC, I connect to the AVR-X2700H Denon, which has 4K/8K enhancement capabilities.

I aimed for the best results on my 8K TV, but during my initial setup, the OSSC addon board hadn’t arrived yet. So, I used the Mygica HD Cap-X2, which has RCA input and HDMI output, converting it further to VGA. However, when using the OSSC addon board, you can simply plug the RCA directly into it.

My current OSSC setup (detected as 576i due to the Mygica device) provides a resolution of 240p or 480p when using the OSSC addon board. To achieve the desired visual quality, I applied the following settings:

  1. Line 2x
  2. Custom Scanlines:
    • Sub Line 2 Strength: 43%
    • Sub Line 4 Strength: 100%
    • Sub Column 2 and 4: 31%

In the Denon AVR-X2700H, the signal is upscaled to 4K at 50fps.

Here’s how it looks on my 8K QLED TV (55 inches) from Samsung:

While it may not be perfect, it certainly looks better than using RCA alone without any video processing. If you would like to see a video capture directly in 4K, you can see it below.

If you own an OSSC, feel free to try out my setup mentioned above. I hope you find it useful!

Have a nice day!

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