Building a Lightweight, Zero-Config H.265 Batch Converter with Go and FFmpeg

Introduction Video storage is a constant struggle. While H.265 (HEVC) offers incredible compression, most conversion tools are either too complex or too bloated. I wanted something simple: Drag, Drop, and Done. That's why I built EZ265, a native Windows batch converter designed for speed and simplicity. The Tech Stack To keep the application snappy and portable, I chose: Go: For its excellent concurrency (ideal for job queues) and easy Windows API integration. lxn/walk: A native Windows GUI toolkit that keeps the binary size small and the UI responsive. FFmpeg: The industry-standard engine, but with a twist. Key Technical Challenges Minimalist FFmpeg Distribution Standard FFmpeg binaries are around 100MB+. For EZ265, I created a custom Docker-based build script to strip down FFmpeg to only the necessary decoders and encoders (NVENC/x265). Result: A fully functional engine at only ~3MB. Smart Hardware Acceleration I implemented auto-detection for NVIDIA NVENC. The app probes the system'