Mkvtoolnix versions

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.

v5.8
-09-02-6920:
- mkvpropedit: new feature: Added support for adding, deleting and replacing attachments.