QOV - Quite OK Video

A simple, fast video format inspired by QOI (Quite OK Image) and QOA (Quite OK Audio).

• Simple format - Easy to implement encoder/decoder
• Fast encoding/decoding - Designed for real-time performance
• LZ4 compression - Optional chunk-level compression for smaller files
• Streaming support - Progressive loading and on-demand frame decoding
• Multiple colorspaces - RGB, RGBA, YUV 4:2:0, YUV 4:2:2, YUV 4:4:4
• Alpha channel support - Transparent video with RGBA and YUVA420 modes
• Keyframe seeking - Efficient random access via keyframe index
• Cross-platform - TypeScript/JavaScript and C#/.NET implementations

Browser-based tools built with TypeScript and WebCodecs.

Recorder Capture video from your camera and encode directly to QOV format.

Player Play QOV files with detailed statistics including file header info, timeline visualization, and keyframe markers. Supports streaming from URLs.

Converter Convert standard video files (MP4, WebM, MPEG, etc.) to QOV format with configurable settings:

• Keyframe interval
• Target frame rate
• Output resolution
• Colorspace selection
• LZ4 compression toggle

# Install dependencies
npm install

# Start development server
npm run dev

# Build for production
npm run build

Then open http://localhost:5173 in your browser.

A complete .NET 8.0 implementation with encoding, decoding, and command-line tools. Located in the csharp_qov/ directory.

• Full QOV Specification 1.0 support
• Stream-based encoding/decoding for efficient memory usage
• Cross-platform (Windows, Linux, macOS)
• Command-line tools for encoding, playback, and screen recording
• Comprehensive test suite

• QovPlayer - Console-based video playback
• QovEncoder - Convert image sequences to QOV
• QovScreenRecorder - Record screen activity to QOV format
• QovValidator - Validate QOV file format compliance

cd csharp_qov
dotnet build
dotnet test

# Run tools
dotnet run --project QovPlayer -- --file video.qov --info
dotnet run --project QovEncoder -- --help

See csharp_qov/README.md for detailed documentation and usage examples.

See the full format specification: qov-specification.md

src/                      # TypeScript/JavaScript implementation
  qov-types.ts            # Type definitions and constants
  qov-encoder.ts          # QOV encoder implementation
  qov-decoder.ts          # QOV decoder (full file)
  qov-streaming-decoder.ts # Streaming decoder (on-demand)
  lz4.ts                  # LZ4 compression/decompression
  color-utils.ts          # YUV/RGB conversion utilities
  player.ts               # Player application
  recorder.ts             # Recorder application
  converter.ts            # Converter application

csharp_qov/               # C#/.NET implementation
  QovLibrary/             # Core encoding/decoding library
  QovPlayer/              # Console video player
  QovEncoder/             # Image sequence encoder
  QovScreenRecorder/      # Screen recording tool
  QovValidator/           # Format validation tool
  QovLibrary.Tests/       # Test suite

MIT