MkvtoolnixMkvtoolnix 
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3DCrafter The latest version of Mkvtoolnix is 78.0 on Mac Informer. It is a perfect match for Editors & Converters in the Audio & Video category.
MKVToolNix is the ultimate solution for working with Matroska (MKV) video files on your Mac. Whether you're creating, editing, or customizing video files, this powerful tool gives you complete control. Easily access the app via the command-line or the user-friendly interface, select files, edit tags and chapters, and adjust various settings such as aspect ratio, FPS, and display dimensions. Perfect for anyone looking to work with MKV files efficiently and effectively.
MKVToolNix lets you perform a wide range of operations on Matroska files, including creating, splitting, muxing, demuxing, merging, and extracting. With a clean interface that combines side and top tabs, it helps streamline your workflow. While the program might feel a bit complex at first, its advanced features make it a great choice for users who want to fully customize their video files. The app also supports multiple formats, offering flexibility for any project.
Start by choosing the operation you want, whether it's inspecting files or editing headings and chapters. After selecting your source files, customize your settings, and configure the output parameters. You can modify tracks and tags, adjust the output aspect ratio, FPS, and set custom delays. Additionally, the app allows you to add cues to frames and adjust compression levels. While it may take a bit of time to master, MKVToolNix’s powerful features make it well worth the learning curve.
