Dubbed “Numbers,” MKVToolNix 9.7.0 comes less than a month after the release of MKVToolNix 9.6.0 “Slave To Your Mind” stable branch, and promises to be a major update that adds lots of enhancements to the graphical user interface (GUI), but also deprecates several options and features that’ll be removed at the start of 2018. As with any new major version of a software product, various requirements have been bumped to new versions. As such, starting with the 9.7 series, to compile MKVToolNix on your operating system, you’ll need either GCC 4.9.x or Clang 3.4 or later, as well as the Qt 5.3.x GUI toolkit.