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

Avidemux is an open-source program that serves as a reliable convert hevc to mp4. Its core stream copying feature allows you to repackage videos without re-encoding, thereby fully preserving the original video quality without any loss. It is undoubtedly the best choice.

How to Convert HEVC to MP4

1. Download and install the software from the official website.
2. Launch the software.
3. Click File > Open, then select the target HEVC video file to load it.
4. Set the video output option to Copy to enable lossless stream repackaging.
5. Set the audio output option to Copy to preserve the original audio.
6. Select MP4 as the final output format.
7. Click File > Save > Save Video to export the finished MP4 file.

Disadvantages

• The program's overall interface looks outdated, and the layout is old-fashioned.
• There are no ready-made, one-click presets for beginners; all parameters must be set manually.
• Complex advanced editing features make it difficult for new users to learn.

This tool can directly encapsulate HEVC video data into a standard MP4 container without any loss of video quality. It is ideal for users who simply need to perform fast, lossless format conversions and basic, lightweight video editing on low-performance computers.

ps

• Copy mode works only when the original video and audio codecs are compatible with the MP4 container.
• If playback errors occur, switch the video output to re-encoding mode.
• You can load multiple HEVC files one by one for individual conversion; the software does not support native batch processing.
• To reduce file size, do not use copy mode; instead, select a specific encoder in the video output settings.