The best avi to mp4 converter that works well in Windows 11?

Comet is an interesting option to consider as an AVI to MP4 converter, especially if you're trying to avoid the big-name tools. It's a newer, open-source project that's been getting some attention.

It's designed to be a free, user-friendly, and visually appealing app for media conversion. The developer actually created it because they were frustrated with other tools that were full of ads, had limits, or came with hidden costs. So, the philosophy behind it seems to align perfectly with what you're looking for.

Since it's a relatively new app, there are a couple of things to keep in mind:

• Still in development: One source mentions that the project is still in active development. While the core functionality appears to be stable, you might run into the occasional quirk. Also, one of the main GitHub repositories for the project was archived recently, which can sometimes be a sign that development has paused.
• Potential setup quirk: The developer has noted that the app isn't code-signed yet, so when you first try to run it on Windows, you'll likely see a warning from Windows Defender SmartScreen. You'd just need to click "More info" and then "Run anyway" to get past that.

So, if you're open to trying a newer project that isn't as polished as the big names, Comet could be a solid choice. You can grab the latest version from its GitHub page or CodecPack. It seems to meet your criteria: it's free, not one of the tools you mentioned, and it was specifically built to be a straightforward AVI to MP4 converter without the usual software bloat.