MKVToolnix is a software that allows you to merge and create video files with the MKV format, as well as view technical information on them. The user interface of the program is plain and simple. You can input videos by using the file browser or the "drag and drop" method (batch processing is supported). So, you can select and arrange tracks, chapters and tags. But you can also configure general track, format specific and extra options. You can edit the track name, tags and timecodes, as well as select the language, default and forced track flag, and set the output filename.