An open-source container that can hold unlimited video, audio, and subtitle tracks, commonly used for high-quality recordings (e.g., OBS).

This guide covers how to handle, convert, and understand files, which typically represent a Matroska Video (MKV) file that has been mislabeled, or more commonly, a video that needs to be remuxed from an MKV container to an MP4 container for better compatibility. 1. Understanding MKV vs. MP4

"Remuxing" is copying the audio and video streams into a new container without re-encoding (no quality loss). Go to File -> Remux Recordings . Drag and drop your .mkv file. Click Remux .

The universal standard container accepted by almost all devices, TVs, and editing software.