MKVToolnix is a set of tools to create, alter and inspect Matroska files under Windows.

With these tools one can get information about (mkvinfo) Matroska files, extract tracks/data from (mkvextract) Matroska files and create (mkvmerge) Matroska files from other media files. Matroska is a new multimedia file format aiming to become THE new container format for the future.

Changes in MKVToolnix 2.9.8 :

- mmg: bug fix: The inputs for timecode files and the language are deactivated if the user has selected a track that will be appended to another track. Fix for bug 432.
- mmg: bug fix: mmg will handle multiple consecutive spaces in the options given with "add command line options" properly and not cause mkvmerge to exit with misleading error messages anymore. The "add command line options" dialog has been reordered, and the drop down box in it is now read-only. Fixes for bug 429.
- doc, mmg: bug fix: The tooltip and documentation for the 'delay' option was misleading. Fix for bug 420.
- mmg/header editor: enhancement: Implemented a considerable speedup in the processing of large files.
- mmg/header editor: bug fix: The header editor copes better with files that do not contain all mandatory header fields. The missing ones are added or assumed to be default values.
- all: bug fix: Selecting the translations with the "--ui-language" option did not work on Mac OS X.
- mkvmerge: bug fix: Fixed an invalid memory access in the VobSub reader module. Fix for bug 426.
- mmg: bug fix: Tracks added from Matroska files did not get their 'default track' drop down box set correctly if the flag was 'off' in the source file and no other track of its kind hat its 'default track' flag set.
- mkvmerge: bug fix: mkvmerge was wrongly turning the 'default track' flag back on for the first subtitle track muxed from a Matroska file if none of the subtitle tracks muxed had their 'default track' flag set in their source files and if the user didn't use the '--default-track' option for setting that flag explicitely.
- mmg: bug fix: Running mkvmerge on Windows from an installation directory with two spaces in the path (e.g. "C:\Program Files\Video tools\mkvtolnix") crashed mmg when the user started muxing. Fix for bug 419.
- mmg: bug fix: Files for which all tracks were disabled were left out from mkvmerge's command line so that tags, chapters and attachments were not copied from such files either.
- mkvmerge: bug fix: Appending MPEG4 part 2 video tracks from Matroska files which contain aspect ratio information will not result in an error message "connected_to > 0" anymore. Fix for bug 427.
- mkvmerge: bug fix: Fixed the audio sync for tracks read from AVI files containing garbage at the beginning. Fix for bug 421.
- mmg: bug fix: Trying to save chapters that contain editions without a single chapter entry does no longer result in a crash but a descriptive error message instead. Saving empty chapters to a Matroska file will remove all chapters contained in the file instead of not doing anything. Fixes for bug 422.
- mkvinfo: enhancement: Implemented speed-ups of up to 50% for middle to larger files.
- mkvmerge: bug fix: Fixed reading AVC/h.264 video tracks from OGM files. Fix for bug 418.
- mmg: bug fix: The chapter language for chapters copied from source files (e.g. Matroska, MP4 or OGM files) is only changed if the user has selected any language other than "und". Fix for bug 420.
- mmg: bug fix: mmg will no longer show an error message if the user has not selected a country in the "chapters" tab of the preferences dialog.