It is extremely fast because it does not re-encode video; it simply "cuts" the data stream. It supports MKV, MP4, and many other formats natively.
If you are looking for a way to perform a "new cut" on an MKV file without losing quality, LosslessCut is the top-rated tool for this specific task. ProjectNew Cut mkv
While Final Cut Pro 12 (released early 2026) offers advanced features like AI-powered dialogue search and magnetic masking, users often still need to convert MKV to MP4 or MOV using tools like VLC or CapCut before starting their edit. It is extremely fast because it does not
mifi/lossless-cut: The swiss army knife of lossless video/audio editing While Final Cut Pro 12 (released early 2026)
Extracting specific scenes from large files like raw camera footage or game captures. 2. Final Cut Pro (Creating a "New Project" with MKV)
Many users search for how to start a "new project" or "new cut" in using MKV files, as Apple’s professional software historically had limited native support for the format.