Best for creating the initial high-quality MKV from physical media. [4] 3. Summary Review: Container Performance MKV (Matroska) :

Can "remux" (change the container from MKV to MP4) without re-encoding video, preserving 100% quality instantly. Cons: Command-line only. [8, 16] MakeMKV

If you are referring to the involving a file of this name on the Firecore Infuse platform, or if you are looking for a review of the MKV to MP4 conversion process , 1. The "4032.mkv.mp4" Metadata Issue (Infuse)

Robust presets, free, open-source. Cons: Always re-encodes, which takes time and can slightly lower quality. [1, 2] FFmpeg Lossless Repacking

is close to standard 4K width) you are trying to convert, here is a review of the top tools used for this specific task: Review Summary Compression