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

ServalC4t — Thu, 26 Mar 2026 12:34:15 +0000

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

Smart Hardware Acceleration
I implemented auto-detection for NVIDIA NVENC. The app probes the system's capabilities at runtime; if a compatible GPU is found, it uses hardware acceleration. If not, it seamlessly falls back to CPU-based x265 encoding.
Native Windows Integration
To make the workflow truly "EZ," I integrated the app directly into the Windows Shell. Users can right-click any video file in Explorer to add it to the encoding queue instantly via Registry manipulation.

Features at a Glance
Batch Processing: Queue multiple files with pause/resume support.

Single Instance IPC: Uses TCP IPC to ensure new files are sent to the already running window.

Low Priority Mode: Encodes in the background without lagging your PC.

Bilingual UI: Auto-detects Japanese/English system settings.

Open Source & Support
EZ265 is fully open-source under the MIT License. Check out the code and the build process on GitHub:

👉 ServalC4t/EZ265 on GitHub

If you find this tool useful for your workflow, feel free to support the development!

I built 3 useful Windows tools in 14 DAYS using AI (Before going offline for 2 months)

ServalC4t — Mon, 23 Mar 2026 20:02:01 +0000

Since March 10th, I’ve been coding non-stop with AI as my "senior developer" partner. In just two weeks, I managed to release three practical tools for Windows.

I'm sharing these today because in 6 days, I’ll be going offshore for 2 months without any internet access. I’d love for you to try these out while I'm away!

1.DualMice (Mouse Hooking):"Control a browser with a 2nd mouse while gaming in full-screen."

"Implemented complex Win32 Raw Input API handling in just a few days with AI assistance."

2.ClipX (Video Processing):"High-speed video clipper for gamers with zero-config FFmpeg."

"Developed an auto-setup engine for FFmpeg and GPU acceleration from scratch in just a few days."

3.Right-Click to Share (Shell Extension):"One-click file sharing directly from the Windows context menu."

"Simplified Windows Shell integration, a task that usually takes weeks, into just 3 days."

Support & Feedback
I won't be able to reply to issues or PRs for the next 2 months, but I’ll check everything as soon as I return!

If you find these tools helpful, "Buying me a coffee" via PayPal would be a huge motivation for my return.

Support via GITHUB Paypal

DEV Community: ServalC4t

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

I built 3 useful Windows tools in 14 DAYS using AI (Before going offline for 2 months)