MKVToolNix v8.5.2 released

Here’s another release of MKVToolNix, v8.5.2, a couple of days after 8.5.1. This time a bug in the HEVC/h.265 handling has been fixed that quite a lot of users seem to be hitting.

You can download the source code or one of the binaries.

Here’s the full ChangeLog since the previous release:

  • 2015-11-04 Moritz Bunkus <>
    • Released v8.5.2.
  • 2015-11-03 Moritz Bunkus <>
    • MKVToolNix GUI: bug fix: the file/track columns aren’t resized to fit their content when expanding/collapsing tree nodes anymore. Such expansion also happened when moving entries with the "move up/down" buttons. Fixes #1492.
    • mkvmerge: bug fix: fixed the values of the "previous/next segment UID" elements when splitting by parts with segment linking enabled. Fixes #1497.
    • mkvmerge: bug fix: mkvmerge no longer creates a "next segment UID" field in the last file when splitting and segment linking is active.
  • 2015-10-22 Moritz Bunkus <>
    • mkvpropedit, MKVToolNix GUI header editor: enhancement: added the "codec delay" track header field as an editable property.
    • mkvmerge: bug fix: fixed an endless loop when updating track headers caused by the fix for "Re-rendering track headers: data_size != 0 not implemented yet". Fixes #1485.

Have fun.

4 thoughts on “MKVToolNix v8.5.2 released

  1. Chz

    Excuse me, I can’t found mmg.exe in the package, can you tell me where can I get it?
    Thank you.

  2. Empatojayos

    I understand the reasons for the change of the software development framework (QT versus WxWidgets),
    but it does not justify the change of look (the advantages of the new design are obscures for me).

    “The man is a creature of habits”, Charles Dickens.

    1. mosu Post author

      Just give the GUI a chance and yourself some time. Get to know it. I’m pretty sure you’ll be used to it in no time. Also look at the preferences. There are tons of options that allow you to customize both the GUI’s looks as well as its behavior.

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