Catchim 🎬

Catchim is a high-performance video editing suite consisting of two main components: a native desktop application powered by C++ that can also compile to WebAssembly, and a modern browser-based editor.

Screenshots

Catchim Desktop App

Catchim Web Editor

Web-based video editor interface derived from OpenCut (https://github.com/OpenCut-app/OpenCut)

Architecture

Catchim is divided into two modules:

App (app/)

The native desktop video editor written in C++ (C++20, Qt6, FFmpeg, GPU acceleration).

• Independent custom engine developed for maximum performance, hardware encoding (AMD AMF, NVIDIA NVENC, Intel QSV), and real-time timeline scrubbing.
• Can be compiled to WebAssembly via Emscripten (catchim_browser_core), allowing the core native engine to run directly inside web browsers.

Web (web/)

The web-based video editor interface running on Next.js, React, Tailwind CSS, and WebGPU / Canvas rendering.

• Derived from the open-source OpenCut project.
• Enhanced with native WebAssembly engine bridges to communicate with the compiled C++ core.

Directory Structure

catchim/
├── app/               # Native C++ desktop application & WASM engine
│   ├── src/           # Core engine, timeline, audio, media decoders, Qt UI
│   ├── tests/         # Engine & regression tests
│   ├── tools/         # Build & browser deployment scripts
│   └── CMakeLists.txt # C++ build configuration
├── web/               # Web video editor frontend (OpenCut based)
│   ├── src/           # React components, timeline, renderer, WebGPU
│   ├── public/        # Static assets and WebAssembly binaries
│   └── package.json   # Web dependencies & scripts
├── docs/              # Technical specifications, audits & screenshots
├── logo.svg           # Catchim vector logo
└── LICENSE            # Project license and copyright notices

Quick Start

Running Desktop App

Requirements: CMake 3.20+, C++20 compiler (MSVC / GCC / Clang), Qt 6.6+, FFmpeg.

Build with CMake:

cmake -S app -B app/build -DCMAKE_BUILD_TYPE=Release
cmake --build app/build --config Release

Running Web Editor

Requirements: Node.js 18+ or Bun. npm run dev uses the checked-in browser WASM artifact. Building the web app also requires Rust/Cargo and the wasm32-unknown-unknown target.

cd web
npm install
npm run dev

After changing the Rust core, refresh its browser artifact with npm run build:rust:wasm. Both npm run build and npm run build:browser rebuild it automatically.

Building C++ Core for Web

./Build_Web.bat

Community and Security

• Security Policy: Vulnerability reporting procedures.
• Code of Conduct: Contributor Covenant pledge and standards.
• Contributing Guide: Setup and pull request guidelines.
• Support: Help and discussions.

License and Attribution

• app/: Developed independently by KIYO GROUP (https://github.com/kiyogo). Licensed under the MIT License.
• web/: Derived from the open-source project OpenCut (https://github.com/OpenCut-app/OpenCut), copyright OpenCut Contributors, licensed under the MIT License.