chaert-s

chaert-s / spektrafilm-ofx

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Development repository of spektrafilm OFX.

spektrafilm.114c.de
44
1
85% credibility
Found May 27, 2026 at 44 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Objective-C++
AI Summary

Spektrafilm OFX is a professional video effects plugin that transforms digital footage to look like it was shot on real film. It simulates the color response, grain structure, and development characteristics of classic film stocks like Kodak Portra, Ektar, and Fuji Velvia. The plugin runs inside video editing software like DaVinci Resolve and uses your computer's graphics processor to render effects in real-time. You can choose a film stock, adjust how the film was 'exposed' and 'developed', add realistic grain that responds to the film format size, create the characteristic halation glow around bright areas, apply diffusion filters like photographers use, and even simulate scanning the film. The plugin supports common video camera formats and can export your color grade as a reusable file for other software.

How It Works

1
🎬 You want that beautiful film look

You've seen movies and photos with that warm, nostalgic film look and want to add it to your video projects.

2
📥 You download and install the plugin

You grab the ready-made installer from the website and install it on your computer, just like any other video effect.

3
🎞️ You pick your favorite film stock

Inside your video editor, you choose from classic films like Kodak Portra, Ektar, or Fuji Velvia—each with its own color personality.

4
✨ You dial in the perfect look

You adjust exposure, push/pull development, add realistic grain, halation glow around highlights, and diffusion filters—watching your footage transform in real-time.

5
You choose how to use your look
🎞️
Render directly

Apply the effect and render your video straight from your editor with all the film magic baked in.

📤
Export a color file

Save a .cube LUT file that preserves just the color transformation, perfect for dailies, on-set monitoring, or sharing with others.

🎉 Your video has that beautiful film soul

Your footage now carries the warmth, grain, and character of analog film—ready to share with the world.

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AI-Generated Review

What is spektrafilm-ofx?

This is a native OpenFX plugin that brings photochemical film simulation into video editing workflows. Built in Objective-C++ with Metal GPU acceleration for macOS, it models the actual spectral and density-based behavior of film and paper -- not just a color grading curve. The plugin runs inside host applications like DaVinci Resolve and gives you controls for film stock selection, push/pull development, enlarger filtration, printer lights, grain synthesis, halation, diffusion, and scanner optics. It can export display-referred LUTs for dailies and monitoring workflows, keeping the pipeline practical for professional finishing.

Why is it gaining traction?

The draw here is authenticity over approximation. This models actual film and print chemistry, not a simplified contrast curve. The LUT export path bridges simulation and production -- you can test looks in the plugin and ship a portable color transform for the rest of the pipeline. Development is active, with parity testing against the original Python implementation to catch regressions. The printer lights system using SMPTE ST 2065-2 Academy Printing Density gives it real-world lab credibility. Windows Vulkan support is early but progressing, which matters for shops split across platforms.

Who should use this?

Colorists and post-production developers building film-look tools into their pipeline. VFX artists who need to match reference footage shot on specific film stocks. Indie filmmakers who want cinematic grain and halation without buying vintage glass. Developers working on color management systems that need a film modeling component. This is less relevant for quick Instagram-style filters and more for workflows where the physics of film actually matter.

Verdict

At 44 stars this is a niche, specialist tool rather than a mainstream library. Documentation is thorough and build tooling is solid, but the community footprint is small. The 0.85 credibility score reflects active maintenance and a principled approach to accuracy. If you need real film chemistry in your app, this is the most technically rigorous open option available. For general color work, look elsewhere.

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