Create, edit, and play Matroska video files (MKV) on your Mac. Use a common way or the command-line to access the application, select files, modify them, edit tags, and chapters. Adjust the aspect ratio, display width and height, FPS, and other parameters.
MKVToolNix helps you perform various operations involving Matroska (MKV) files, such as creating, splitting, editing, muxing, demuxing, merging, extracting or inspecting them. Its interface is based on a combination of side and top tabs. Although I appreciate the efforts to facilitate the work of the users, I feel that the program is still unnecessarily difficult to use. In this regard, I would recommend a redesign.
So, you should first pick an operation, such as inspecting the file and editing its headings and chapters. Next, it is necessary to choose the source files, set the actions and configure the output parameters. In this regard, it is good to know that formats other than MKV are also supported. Besides, the supported actions include customizing tracks and tags. Similarly, the tool lets you customize the output aspect ratio and a number of frames per second, as well as setting a given delay. What is more, the app supports adding cues to the frames and setting a compression level.
To conclude, it is excellent that MKVToolNix allows performing practically any operation on MKV files. Unluckily, it may take some time before you learn to use it fluently. The product is open source and available for free.
v40.0 [Nov 30, 2019]
mkvmerge: MP4 reader: added support for BMP covert art images.
MKVToolNix GUI: multiplexer: added an option to disable deriving the destination file name from the file title. Implements #2648.
MKVToolNix GUI: multiplexer: the content of the "stereoscopy" combo box has been simplified making the box's minimum width much smaller, allowing the user to resize the GUI's whole window to a much smaller width.
MKVToolNix GUI: multiplexer: whenever the user changes the "aspect ratio" or "display dimensions" controls, the corresponding radio button will be activated automatically. Implements #2651.
MKVToolNix GUI: Windows: added a setting in the preferences to disable the GUI's dark color mode even if Windows's app color mode is set to dark. Implements #2646.
MKVToolNix GUI: Windows: replaced the dark mode introduced in v39 with another dark mode that's less wasteful with space between widgets.
Bug fixes
mkvmerge: MP4 reader: mkvmerge was reading eight bytes too many for cover art images. This could cause file identification to fail when the cover art was located at the end of the MP4 file. Even if it succeeded, this meant too much data present in the attachment. Fixes #2650.
mkvmerge: MP4 reader: covert art images with unknown image types will be skipped instead of treated as JPEG images.
Build system changes
Qt 5.9.0 or newer is now required for building MKVToolNix GUI.
