MKVToolNix v57.0.0 released

Hello, hello!

fresh of the presses here’s MKVToolNix v57.0.0. A lot of work has gone into the HEVC/H.265 code over the last couple days, fixing most issues with Dolby Vision and HDR content, but also fixing a couple of general issues with the HEVC/H.265 code. Everyone using that codec should definitely update.

The state of Dolby Vision & HDR is pretty good right now. The only thing still missing is reading Dolby Vision from Annex B type elementary streams (raw .h265 files or MPEG transport streams), but we’re working on that as well.

By the way: a lot of you have decided to support MKVToolNix by buying it from the Microsoft Store for which I’m very, very grateful. At the point of writing it has been sold 544 times already. One immediate benefit is that I’ve invested in Dolby Vision capable hardware in order to be better able to test & improve that part of MKVToolNix. Your support is definitely making a difference.

You can download the source code or one of the binaries. The Windows and macOS binaries as well as the Linux AppImage are available already. The other Linux binaries are stil being built and will be available over the course of the next couple of hours.

Here are the NEWS since the previous release:

New features and enhancements

  • mkvmerge: MP4 reader: added support for reading Dolby Vision from MP4 files (FourCCs dvh1 and dvhe; configuration records dvcC, dvvC and hvcE will be converted into block addition mappings). Implements #2784.
  • mkvmerge: SRT subtitles: mkvmerge now accepts empty text files with the extension .srt as SRT subtitle files, enabling the creation of empty SRT tracks. Implements #3089.
  • mkvmerge, mkvextract: HEVC/H.265: access unit delimiter NALUs will no longer be discarded, neither during muxing nor during extraction.
  • MKVToolNix GUI: preferences: switched the order & wording of controls in the “enabling items” panel to make it clearer that certain controls define exceptions. Inspired by 3086.

Bug fixes

  • mkvmerge: HEVC/H.265 parser: several NALU types, notably the Dolby Vision-specific NALUs (“unspecified 62” and “unspecified 63”) and suffix SEI NALUs, are now stored with the frame they belong to instead of with the next frame. Part of fixing & implementing #2784, #2818, #3093 and #3113.
  • mkvmerge: HEVC/H.265 packetizer: fixed setting the track’s default duration when reading HEVC/H.265 from Matroska files that don’t have a default duration set.
  • mkvmerge: HEVC/H.265 packetizer: fixed the calculation of the duration of frames so that SimpleBlock elements can be used again instead of BlockGroups with BlockDuration elements. Fixes #3114.
  • mkvmerge, mkvextract: HEVC/H.265 parser: fixed issues with ordering & duplication of certain NALUs (parameter set & prefix SEI NALUs). Part of fixing & implementing of #2784, #2818, #3093 and #3113.
  • MKVToolNix GUI: multiplexer: when dragging & dropping files to the multiplexer, the source directory will be remembered as the “last open directory” again, causing subsequent uses of the “open file” dialog to start in the same directory. Fixes #3110.
  • mkvinfo: fixed the position of frames in block groups containing “block duration” elements in summary mode (e.g. for subtitle tracks).

Build system changes

  • configure will now try to detect libmagic via pkg-config and fall back to including & linking directly if it cannot be found via pkg-config.

Have fun 😁

MKVToolNix v56.1.0 released

Hello again,

unfortunately the release I’ve done only four days ago contains a nasty bug in the HEVC/H.265 code, and people are hitting it in droves. Therefore I’m releasing a fix for that today

You can download the source code or one of the binaries. The Windows and macOS binaries as well as the Linux AppImage are available already. The other Linux binaries are stil being built and will be available over the course of the next couple of hours.

Here are the NEWS since the previous release:

New features and enhancements

  • mkvmerge: AAC: added support for LOAS/LATM files with channel configuration indexes 9–21 (e.g. channel count 22.2 for index 13) according to Rec. ITU-R BS.1196-7 & ISO/IEC 23008-3:2019. Fixes #3081.

Bug fixes

  • mkvmerge: HEVC/H.265 parser: fixed invalid memory access that could happen when reading certain types of HEVC data (e.g. with changing parameter sets mid-stream) from certain containers (e.g. Matroska). This bug was introduced in release 56.0.0. Fixes #3083.
  • mkvextract: AAC: mkvextract will now abort with an useful error message when the user tries to extract a track whose ‘audio-specific config’ element in CodecPrivate signals a number of channels of 7 or greater than 8 as that isn’t supported by the ADTS format.

Build system changes

  • configure: the --enable-ubsan option hasn’t actually enabled anything since release 39.0.0.

Have fun 😎

MKVToolNix v56.0.0 released

Heyo everyone,

time for the April release of MKVToolNix. It’s mostly a bug fix release focussing on improving a lot of fundamental functionality such as chapters & tags.

The most notable thing to have happened, though, is that the Windows version of MKVToolNix is now available from the Microsoft Store. It isn’t free there, though, as it is meant to be a way for you to actively support the development of MKVToolNix (you get automatic updates in return). Please note that this is purely optional and will forever remain optional: completely free variants for Windows will always be available from the home page, just like in the past. See this FAQ entry for more information.

You can download the source code or one of the binaries. The Windows and macOS binaries as well as the Linux AppImage are available already. The other Linux binaries are stil being built and will be available over the course of the next couple of hours.

Here are the NEWS since the previous release:

New features and enhancements

  • mkvmerge, mkvpropedit: tags: the programs will no longer write tag elements that are mandatory and set to their default value (e.g. “tag language” set to und = undetermined).
  • mkvmerge, mkvpropedit, MKVToolNix GUI chapter editor: chapters: the programs will no longer write chapter elements that are mandatory and set to their default value (e.g. “chapter language” set to eng = English or “Chapter flag enabled” = 1).
  • mkvextract: chapters: mkvextract will no longer add a ChapterLanguage element set to eng to the generated XML content if the source file doesn’t contain such an element.
  • MKVToolNix GUI: multiplexer: when using the “tab widget below the files & tracks” layout option for the track properties the elements in the “general options” tab will use six rows à four columns instead of twelve rows à two columns, greatly reducing the required height. Implements #3062.

Bug fixes

  • mkvmerge: AAC reader: fixed mkvmerge aborting to read AAC files bigger than 2 GB with a message about not being able to allocate memory. Fixes #3059.
  • mkvmerge: chapters: ChapLanguageIETF elements were still created when the option --disable-language-ietf was given after an option leading to the creation of chapters. Now the position doesn’t matter anymore. Part of the fix of #3069.
  • mkvmerge: chapters: when the option --disable-language-ietf is used, ChapLanguageIETF elements won’t be written even when sources are read (Matroska files or XML chapters files) that do contain those elements. Part of the fix of #3069.
  • mkvmerge: tags: when the option --disable-language-ietf is used, TagLanguageIETF elements won’t be written. Fixes #3070.
  • mkvmerge: tags: mkvmerge will no longer write language elements for the track statistics tags it creates, making the effective language “undetermined” due to und being the default value for the legacy tag language element. Fixes #3073.
  • mkvmerge: tags: the XML tag parser will now validate all <Simple> children of <Tag> elements, not just the first for each <Tag>. Part of the fix of #3071.
  • mkvmerge: tags: the XML tag parser now uses the spec-compliant und (“undetermined”) as the default language for <Simple> tags instead of eng. Part of the fix of #3071.
  • mkvmerge, mkvpropedit: tags: mkvmerge will no longer set the “target type” for track statistics tags (earlier it used MOVIE). The “target type value” will still be set to 50. Fixes #3074.
  • mkvmerge, mkvextract: HEVC/H.265: both programs will now normalize the placement of VPS, SPS and PPS NALUs. Each key frame is prefixed with exactly one copy of the currently active parameter sets. This fixes certain classes of bugs related to splitting/appending. Fixes #3034.
  • mkvinfo: when compiled with newer versions of the fmt library, certain numbers were not output correctly (e.g. a track’s audio sampling frequency of 48000 might be output as 48).
  • MKVToolNix GUI: multiplexer: deriving the track language from the file name will match languages case insensitively again (like versions prior to v55). Fixes #3068.
  • MKVToolNix GUI: multiplexer: under certain circumstances keyboard shortcuts such as Ctrl+W for closing the active tab or Ctrl+R for starting to multiplex ceased to work until the user did certain other things (such as switching to a different tool & back to the multiplexer or opening the multiplexer menu). This started with v54. Fixes #3051.
  • MKVToolNix GUI: chapter editor: the editor will no longer create empty ChapterCountry elements when adding a chapter name with no default country selected in the preferences. Fixes #3072.

Build system changes

  • The bundled fmt library was updated to v7.1.3.

Have fun 😊

MKVToolNix available in the Microsoft Store

Starting today you can install MKVToolNix from the Microsoft Store. There’s one caveat, though: it actually costs money in the Store.

But why? Isn’t MKVToolNix Open Source?

Let me start by saying that yes, MKVToolNix is Open Source and always will be. Let me further make it very clear that binaries of all variants of MKVToolNix, including the ones for Windows, will always be available from its home page free of charge. Functionally there will be no differences between the Windows binaries, no matter where you get them from.

So why have a paid version in the Store? Simple: it’s a way for you to support the development of MKVToolNix. In return you don’t have to update it manually anymore as the Store will install them automatically for you.

If you want to support MKVToolNix this way, great, and thanks! Just head over to the Microsoft Store and buy it there. If you don’t want to pay for it for whatever reason, that’s perfectly fine as well! Nothing will change for you: head over to the downloads section on the home page & get it from there.

And in case you want to support MKVToolNix without having to pay, there are so many things you could do. Here are a couple of examples:

I’m really grateful for all such contributions to MKVToolNix and its community.