How can I convert HEVC to MP4 on Windows 11 without losing quality

FastFlix is a free and open-source tool that acts as a nice graphical front-end for a powerful media processing backend. It makes handling video encoding much more approachable. If you want to convert HEVC to MP4 on Windows 11 using FastFlix, there's one small catch: it defaults to outputting MKV files. But don't worry—it's an easy fix.

1. Download and Install: Grab the FastFlix installer from its official website or a trusted download source. You can choose between a standard installer or a portable version, whichever you prefer.

2. Add Your Video Files: Open the app and click the "Source" button to import your HEVC video files.

3. Choose Your Encoder: In the video encoder dropdown menu, you can pick your preferred method. For example, you can use the CPU-based software encoder x265, or if you have an NVIDIA graphics card, you can select NVENC HEVC for super-fast hardware-accelerated encoding.

4. The Key Step: Set MP4 as Output: This is where you tell FastFlix to output an MP4. While the official documentation only "guarantees" MKV output, it also mentions that you can manually change the output file extension to .mp4 in the output file field. The resulting file will be a proper MP4 container. For best compatibility, set your video codec to H.264/H.265 and audio to AAC.

5. Start the Conversion: Set your output path, tweak any other settings you like, and hit the "Convert" button.

So, to convert HEVC to MP4 on Windows 11 with FastFlix, the main trick is to choose your encoder and then manually rename the output file extension to .mp4. Once you do that, you'll get a nicely compatible MP4 file without any fuss!