You can download it from GitHub.

The highlights of this version are a new placebo GPU module based on libplacebo, a 32-bit float default audio sample format, and Adjustment Clips (fx_cut) that filter only the tracks below them.

Framework

• Added a list-based dispatch for image-conversion callbacks on mlt_frame. Use mlt_frame_append_convert_image() to register a converter instead of setting frame->convert_image directly. Multiple converters are tried in registration order; the first that succeeds wins. New public API:
  • mlt_frame_prepend_convert_image()
  • mlt_frame_append_convert_image()
  • mlt_frame_convert_image()
  • mlt_frame_next_convert_image()
  • mlt_frame_has_convert_image()
  • mlt_frame_copy_convert_image()
• API behavior change: mlt_frame_s::convert_image is now read-only after init and is permanently set to the dispatcher mlt_frame_convert_image(). A custom function written directly to this field is no longer called. If you really need that (I have never heard of anyone who does), clear the frame’s _convert_image_callbacks property and use mlt_frame_append_convert_image() instead.
• fx_cut (Adjustment Clip) now applies its filters only to tracks below it. Higher tracks composite on top of the filtered result. New image-stack helpers are used by tractor stacking and by fx_cut:
  • mlt_frame_prepend_image_from_service()
  • mlt_frame_push_image_with_fx_cut()
• Fixed a crash when applying a Movit (OpenGL) filter to an fx_cut (Adjustment Clip). Cross-producer image sharing (including the reverse fx_cut share) finalizes an in-progress Movit chain as rgba64 and does not copy producer-keyed _movit chain state. Same-producer prepends keep the GPU chain. Playlist fx_cut frames now set _producer so Movit can key the chain.
• meta. and set. properties are now copied from the producer onto fx_cut frames so producer annotations reach tractor output. New public API:
  • mlt_producer_pass_frame_properties()
  • Mlt::Producer::pass_frame_properties()
• Changed the default audio sample format to float32 (mlt_audio_f32le). Added mlt_audio_format_id() and an mlt_audio_format property on the multi consumer. Conversion between integer and float is lossless and symmetric (s16 and u8 round-trip exactly).
• Deprecated the sox filter, which only supports 32-bit integer samples.
• Deprecated the volume filter’s normalize parameter because it forces 16-bit integer audio. Use dynamic_loudness instead. The volume filter itself still supports float samples.
• Per-track audio-level metadata is now propagated to output frames (meta.audio.*).
• Improved mlt_property_is_anim() so strings that merely contain = (for example URLs) are not treated as animation.
• mlt_properties_get_data() no longer returns a data pointer for rect properties.
• Fixed a signed integer overflow in mlt_luma_map_from_pgm.
• Fixed fx_cut in-point handling in mlt_transition.
• Fixed Android mlt++ builds by disabling ELF symbol versioning.
• Fixed a macOS crash in numeric property conversion caused by setlocale. Parsing and formatting no longer change the process LC_NUMERIC.

Modules

• Image converters (movit.convert, avcolor_space, imageconvert) are now attached from data in loader.ini, using the image_convert key.
• Movit rgba64 is now a valid input as well as an output: FlatInput is created with GL_UNSIGNED_SHORT and set_pixel_data() uses the 16-bit overload. Previously, rgba64 was uploaded as 8-bit, which distorted the image when an OpenGL filter ran on an fx_cut.
• Added placebo GPU module (placebo.render, placebo.shader) using libplacebo for scaling, debanding, dithering, tonemapping, and mpv-style .hook shaders (D3D11 / Vulkan / OpenGL).
• Fixed a deadlock in the decklink consumer when pausing, seeking, and resuming playback.
• Added ducking to the mix transition (duck_threshold, duck_attenuation, duck_level, duck_fade_in, duck_fade_out, and an optional prefix that records the level on the frame as <prefix>duck_level).
• Added #frame+1# keyword in dynamictext (1-based frame number).
• Added more audio formats to the audiolevel filter.
• Added FFmpeg 9 support in avformat.
• Fixed 10-bit hevc_vaapi encoding.
• The avformat consumer now logs when it finishes.
• Fixed rnnoise so it works at sample rates other than 48 kHz by resampling.
• frei0r.kaleid0sc0pe and frei0r.squigglevision now report internal threading.
• Fixed frei0r.camerashake (and its blur) with preview scaling.
• The OpenFX module now skips duplicate plugins.
• USE_LV2 and USE_VST2 require USE_LADSPA. The LADSPA blacklist.txt is installed even without JACK, and LV2_PATH is expanded correctly on Windows.
• Fixed affine and qtblend inside mask_apply.
• Fixed the qtblend transition so it does not apply pixel-aspect normalization twice.
• Fixed alpha scaling in the luma transition, including when a luma file is used, and documented the invert property.
• Fixed shape filter alpha subtraction for rgba.
• Fixed motion-tracker shapes clipping outside the frame.
• Fixed colorspace and range of cached images in qimage and pixbuf.
• Fixed crop when hardware decode and scale are combined with preview scaling.
• Fixed the subtitle filter rendering one frame past its end time, and fixed the subtitle_feed end-frame calculation.
• Fixed filename buffer overflows in gpsgraphic and gpstext.
• Fixed the sdl2 consumer so it no longer freezes on Windows after a few seconds.
• Fixed sdl2_audio so it no longer hangs in consumer_stop() when stopped while paused.
• Added s32, float, s32le, f32le, and u8 to the noise producer, and s16, s32, s32le, f32le, and u8 to tone. Fixed tone integer conversion to match audioconvert.
• Fixed a double-free in the xml producer when a filter, transition, link, or producer fails to load.
• Fixed movit.convert leaking a Movit input on every frame when an effect chain is reused.
• Fixed the heart-rate keyword in gpstext (#gps_hr#).
• gpsgraphic no longer sets time_offset when a GPS file is first loaded.

Other

• melt prints its progress when it finishes and exits with a non-zero status when interrupted by a signal.
• Fixed melt on Windows so it no longer ignores window resizing and keyboard transport.
• Fixed melt -jack option not working with PipeWire.

Core

Improvements

• Remove AVX2 requirement. It is still required for v210 decklink output, but not for other usage.
• Update FFmpeg to 8.1.2

Fixes

• AMCP: Prevent race when executing BATCH
• Linux: Support SFML 3 (not 100% feature parity)
• Windows: Prevent background throttling when no visible window
• Channel grid failing to initialise

Producers

Fixes

• FFmpeg: Gracefully handle ENOMEM errorss
• FFmpeg: Reduce mutex contention
• FFmpeg: Ensure graph is stopped before joining
• HTML: Missing WebGPU libraries (windows only)

Consumers

Improvements

• Decklink: Add option to disable keying
• Audio: Configurable delay
• Audio: Allow multiple devices to be used
• Audio: Improve sync to other consumers
• Screen: Configurable delay

Fixes

• Audio: Device enumeration issues
• Decklink: Recover av-sync in extreme cases
• Decklink: Check for keying support before enabling
• Decklink: Free model names string

Full Changelog: v2.5.0-stable...v2.5.1-stable

Hello gentle people!

An unsually short time between releases means a security fix, and that’s almost all this release is.

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

Here are the NEWS since the previous release:

Version 102.0 “Little Houses” 2026-09-14

Bug fixes

• MKVToolNix GUI: executing actions, type “execute a program”: all the variables (<MTX_…>) will now be replaced again in the argument list to the program to be executed. This was broken in v100. Fixes #6306.

Security fixes

• CVE-2026-90783: avilib: fixed potential heap overflows/invalid memory access in the ODML index handling due to unsiged integer multiplication wrapping around (colloquially known as “overflowing”) with specifically crafted AVI files. Affects only mkvmerge as the other tools do not read AVIs. Reported by Tristan Madani TristanInSec@gmail.com.

Have fun! 😁

Hey y’all!

The first release after the milestone round version v100 is here, v101. It’s pretty small, but I still suggest everyone update due to the inclusion of updated underlying libraries libEBML & libMatroska. Both are updated to their respective releases from a couple of weeks ago which fix several potential invalid memory access cases that could be triggered by reading files broken in very rare, specific ways. Basically they’re potentially security-relevant.

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

Here are the NEWS since the previous release:

Version 101.0 “Time To Turn” 2026-08-24

New features and enhancements

• translations: substantial extension of the Czech translation by Michal Várady.

Bug fixes

• mkvmerge: TrueHD parser: fixed mkvmerge dropping the last TrueHD frame if its size was smaller than 12 bytes. Fixes #6296.
• MKVToolNix GUI: job runner: the variable <MTX_INSTALLATION_DIRECTORY> will be replaed in the executable position of the command-line for the program to execute again. Fixes #6299.
• Windows: fixed converting the scalable SVG icons into the bitmap .ico ones used on Windows so that the grey background remains uniform & doesn’t get garbled. Fixes #6280.

Build system changes

• The bundled libraries libEBML & libMatroska were updated to v1.4.7 & v1.7.2 respectively. Those versions fix various possible invalid memory accesses when reading data broken in certain, very specific ways, making them security sensitive.
• libEBML v1.4.7 & libMatroska v1.7.2 are now required.
• The meta info file org.bunkus.mkvtoolnix-gui.appdata.xml was renamed to org.bunkus.mkvtoolnix-gui.metainfo.xml.

Have fun! 💝😁

Heyo!

It’s happening, v100 is here. Yay! It contains nothing overly drastic, but it’s still a nice assortment of enhancements & bug fixes for users of all OS.

A big thanks to all the contributors over the years, but especially for the people who have contributed over the last three months. This yielded continued macOS builds and several bug fixes that I hadn’t gotten around to tackling myself.

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

Here are the NEWS since the previous release:

Version 100.0 “Do Hot Girls Like Chords” 2026-07-05

New features and enhancements

• all: added new scalable (SVG) application icons for all applications, replacing the existing pixmap (PNG, ICO) icons. Icons from Sarreq Teryx. Implements #6253.
• mkvmerge: MP4 reader: track names are now read from the track’s user-data atoms (trak → udta → name) if present. Implements #6274.
• MKVToolNix GUI: executing actions configuration, type “play audio file”: added a slider to make configuration more intuitive. Implemented by #6267.
• MKVToolNix GUI: executing actions: macOS only: the GUI will now use bundled audio files for “play audio file” actions that Qt can play instead of using macOS’s system sounds. Implemented by #6268. Fixes #6264.
• MKVToolNix GUI: executing actions: Windows only: added a new type: executing a PowerShell script. Either an existing script file can be selected or custom PowerShell script code entered in a small editor. The executed script has access to all MTX_… variables through the environment, e.g. $env:MTX_DESTINATION_FILE_BASE_NAME. Workaround for the problems talked about in #6254.
• MKVToolNix GUI: job queue: added a context menu for opening copies of the selected queue jobs in the multiplexer as new settings there without removing the queue jobs. Implements #6255.
• MKVToolNix GUI: job queue: added a search functionality for jobs that searches in job descriptions, outputs, warnings & errors. Implements #6256.

Bug fixes

• command-line tools: Windows: switched to Boost’s UTF-8 code-conversion facet (boost::locale::utf8_codecvt) from std::utf8_codecvt included in MingW. This seems to fix an issue with converting certain high code point from wchar_t to char (from UTF-32/16 to UTF-8), preventing interesting exceptions from being thrown. Fixes #6257.
• mkvmerge: AAC: fixed mis-detection of ADTS streams not starting on a frame boundary. Fixes regression starting with v87 when fixing AAC LATM config not being parsed if it wasn’t present in the first AAC frame. Patch by Corticalcode. Fixes #6196.
• mkvmerge: MPEG TS reader: under certain rare conditions mkvmerge was skipping a certain amount of content at the start of the main M2TS file when reading MPLS playlists. The amount of content skipped proportional to the probe range percentage. This only happened when the source Blu-ray contains HDMV TextST subtitles. Fixes #6269.
• MKVToolNix GUI: executing actions configuration, type “play audio file”: fixed audio volume not working since switching to Qt 6 due to its interface taking a float in range 0.0–1.0 instead of the old interface taking an int in range 0–100. Implemented by #6267. Fixes #6266.
• MKVToolNix GUI: executing actions: fix backslash handling when parsing a Unix-shell escaped string into separate arguments. The user-visible fix is that the command-line in the “executing actions” dialog will not have the quoting changed in wrong ways by the GUI when the GUI adds another variable upon user request, a regression introduced in v99. Fixes #6253.

Build system changes

• all: when building for Windows the programs ImageMagick (executable magick) & Inkscape (executable inkscape) are required in order to build ICOs from SVGs.
• macOS: include the app’s supported platform(s) in Info.plist to correctly resolve the app’s Kind as Apple Silicon in System Information. Detected during discussion of #6260.
• macOS: updated Qt to 6.11.1. The patch that made building Qt from source possible on macOS 26.4 (by Touchstone64) has been removed as Qt 6.11.1 includes the fix upstream. See #6276.

Have fun yall! 💖🎉

Dropped support for armhf (32-bit ARM) for Ubuntu.

Dropped support for Ubuntu 25.10 "Questing Quokka".

Heyo everyone.

Here’s MKVToolNix v99. There are a couple of bug fixes & improvements in the GUI & in mkvmerge among with a huge amount of fixes/changes/improvements to the macOS build system. Yes, that’s right, macOS binaries are back.

Thanks to the huge amount of work by two community members, corticalcode & touchstone64 (Graham Thompson), we will once again provide macOS binaries (DMGs) for releases v98 (already available for download) and newer (such as this one, v99). Both have improved the macOS build system significantly, implemented building ARM binaries in addition to Intel binaries (this includes a Universal DMG) and fixing bugs they come across while doing so. I’m very grateful for their work, and the MKVToolNix community as a whole is better off.

The macOS DMGs I’ll host on the project’s home page will be built by aforementioned Graham Thompson, not by me. They’re signed & all the good stuff. You can find details about the certificate used on the authenticity page.

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

Here are the NEWS since the previous release:

Version 99.0 “Buka” 2026-05-24

New features and enhancements

• MKVToolNix GUI: the GUI will now remember the last used directory for selecting audio files for playback in “play audio file” program runners separately from any other “open file”-type situations. This directory will also default to /System/Library/Sounds on macOS now. Implemented by #6213.
• MKVToolNix GUI: executing actions → running programs: added new variables: MTX_DESTINATION_FILE_BASE_NAME (the name without the drive letter, path or the suffix; e.b. /movies/A.new.hope.mkv → A.new.hope) and MTX_DESTINATION_FILE_SUFFIX (only the letters after the last ., e.g. /movies/A.new.hope.mkv → mkv). Added examples to all the destination file variables in the popup menu when adding variables in the preferences. Implements parts of #6220.
• MKVToolNix GUI: executing actions → running programs: the command-line input widget will now receive focus again after using the popup menu for adding a variable. Implements parts of #6220.
• MKVToolNix GUI: executing actions → running programs: the variables will now also be set as environment variables when running a program after a job completes.
• MKVToolNix GUI: executing actions → running programs: when using the “Execute now” button for testing the MTX_… variables will be set to the current multiplexer tab’s values for easier testing. Implements parts of #6220.

Bug fixes

• mkvmerge: if using legacy font MIME types is off mkvmerge will now remap legacy font MIME types present in source files into the current ones. Patch by corticalcode via #6249.
• mkvmerge, mkvpropedit, MKVToolNix GUI’s multiplexer & header editor: on Windows & macOS the MIME type detection will now use the FreeDesktop.org MIME database instead of falling back to file extension-based guesses. This matches how it works on other operating systems. This fixes e.g. OpenType fonts being detected as the legacy type application/vnd.ms-opentype instead of the current IETF RFC, font/otf, no matter what the “use legacy font MIME types” settings in the preferences was set to. Fixes #6240 for Windows; fixes #6248 for macOS. Implemented by corticalcode for macOS in #6250.
• MKVToolNix GUI: update checker: fixed a potential attempt to read from an invalid memory address if an error occurred when parsing the XML file retrieved from the official MKVToolNix server.
• macOS: GUI: the default audio file for program runners of type “play audio file” has been changed to an AIFF file as Qt’s Multimedia backend routes through Core Audio which doesn’t support WebM/VP8/Vorbis/Opus. Existing configurations will be updated if they point to the prior default WebM audio file. Fixes #6209.

Build system changes

• macOS: build.sh: the Qt installation is now done via cmake --install instead of using classic make as the classic Makefiles produced by Qt’s build system are incomplete. Patch by corticalcode. Fixes #6205.
• macOS: build.sh: the binaries in the DMG are now stripped of debug symbols. Patch by corticalcode. Fixes #6206.
• macOS: build.sh: enabled release build optimizations for dependencies. Patch by corticalcode. Fixes #6207.
• macOS: build.sh: disabled use of pkg-config for Qt to prevent linking against installed non-OS libraries such as from Homebrew. Patch by corticalcode. Fixes #6208.
• macOS: added support for notarization of a macOS disk image by an Apple developer account. Implementation of #6212 by Touchstone64.
• macOS: patch added to make building Qt 6.11 from source possible on macOS 26.4. Patch by Touchstone64.
• macOS: additions to DMG package naming including the machine type it targets (arm64 or x86_64) and a revision number (to support re-packaging of an existing MKVToolnix release). For example, MKVToolNix-98.0-1-arm64.dmg would represent the first revision of a DMG package for an Apple Silicon Mac, containing MKVToolNix release 98.0. Implementation by Touchstone64.
• macOS: the packaging process now verifies the MKVToolNix source release using the author’s GPG key before packaging. Implementation by Touchstone64.
• macOS: the app bundle name has been standardised by removing the version number, so DMG packages will contain ‘MKVToolNix.app’. Implementation by Touchstone64.
• macOS: Qt is now built without printing support, reducing the size of the resulting DMG slightly. Implementation by Corticalcode. Implements #6230.

Have fun 😁

macOS binaries: Thanks to the huge amount of work by two community members, corticalcode & touchstone64 (Graham Thompson), we will once again provide macOS binaries (DMGs) for releases 98 and newer. Both have improved the macOS build system significantly, implemented building ARM binaries in addition to Intel binaries (this includes a Universal DMG) and fixing bugs they come across while doing so. I'm very grateful for their work, and the MKVToolNix community as a whole is better off.

Added packages for Ubuntu 26.04 "Resolute Raccoon".

Even though I’ve just released v98.0 & written about dropping macOS support in the second half of 2026 (like before), this was before I realized that my macOS build environment is currently completely broken. I’ve unsuccessfully tried to fix it for several hours yesterday, and have been seriously considering giving up for good & letting the previous release be the last one for which I provided macOS builds.

After sleeping over it this is indeed my decision: I will no longer provide macOS binaries starting with yesterday’s release, v98.0.

I’m sorry for the shortened timeline. This was obviously not the plan.

Hello there!

MKVToolNix v98 is now out, again just a pretty small release with just a handful of changes — but why hold off even longer? Who knows when things will pick up again. So here we are!

An important reminder for macOS users: I will stop providing macOS binaries and any kind of support for macOS in the second half of 2026 due to Apple discontinuing support for the Rosetta x86-to-ARM translation system. As my current build process only works on x86 (Intel) macs this will be the end of the line for any kind of mac support for me. There is some community support in the form of third-party builds over on the MKVToolNix forum.

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

Here are the NEWS since the previous release:

Version 98.0 “Chonks” 2026-04-05

New features and enhancements

• all: huge update to the Japanese translations which had been not worked on for several years. The program translation is now complete again, the man page translation has been extended as well. Both were reworked in most places. Translations by coolvitto.
• GUI: chapter editor: added an option in the “additional modifications” dialog that toggles applying the selected modifications to all currently open chapter editor tabs. Implements #6189.
• GUI: macOS: added dock icon progress bar for job queue. Patch by Miklos Juhasz.

Bug fixes

• GUI: chapter editor: when renumbering chapters limiting the number of chapters to renumber did not work. Fixes #6199.
• GUI: macOS: fixed refreshing widgets after system switches between dark & light modes. Patch by Miklos Juhasz.

Build system changes

• The bundled fmt library was updated to v12.1.0, fixing a build issue on FreeBSD. Fixes #6191.

Have fun 😁

Dropped support for Ubuntu 25.04 "Plucky Puffin".

Hi fine folks!

Happy new year everyone. Here’s v97.0 of MKVToolNix, probably the smallest release I’ve ever done with just two NEWS.md entries. But I like to keep up with my ususal schedule, so here we are. Feel free to skip this release if the feature mentioned below is irrelevant for you.

An important note for macOS users: I will stop providing macOS binaries and any kind of support for macOS in the second half of 2026 due to Apple discontinuing support for the Rosetta x86-to-ARM translation system. As my current build process only works on x86 (Intel) macs this will be the end of the line for any kind of mac support for me.

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

Here are the NEWS since the previous release:

Version 97.0 “You Don’t Have A Clue” 2026-01-02

New features and enhancements

• mkvmerge: MP4 reader: added support for TrueHD in MP4 with FourCC mlpa. Implements #6178.
• installer: the Windows installer will request admin permissions again, as it did before release 96.0.

Have fun 😁

macOS binaries: I will stop providing macOS binaries and any kind of support for macOS in the second half of 2026 duej to Apple discontinuing support for the Rosetta x86-to-ARM translation system.

Heyooo.

Here’s the latest, the greatest (maybe?) release of MKVtoolNix, v96.0. Business as usual: couple of enhancements, couple of bug fixes.

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

Here are the NEWS since the previous release:

Version 96.0 “It’s My Life” 2025-11-08

New features and enhancements

• all programs: added a command-line parameter --no-bom that disables writing byte order marks to text files encoded with one of the UTF variants. Implements #6166.
• MKVToolNix GUI: multiplexer: added variable <MTX_CHAPTERS_FILE_NAME> to the “run program after job completion” mechanism containing the absolute path to the chapters file name. Implements #6172.

Bug fixes

• mkvmerge: OBU reader: fixed probing files in which the first frame ends after the 1MB mark, which is how big the memory buffer used for probing content is. Fixes #6165.
• mkvmerge: VobSub reader: VobSub .idx files that start with a byte-order mark (BOM) are now read again correctly. Fixes #6162.
• mkvextract: AV1/IVF: fixed inserting a temporal delimiter OBU at the start of each frame if there is none. Mostly fixes #6120.
• mkvextract: AV1/IVF: fixed a potential calculation error when deriving frame rate numerator & denominator from Matroska’s default duration. Part of the fix of #6120.
• mkvextract: AV1/IVF: fixed calculation of IVF frame number calculation from Matroska’s frame timestamps by rounding instead of truncating. Part of the fix of #6120.

Have fun 😁

Added packages for Fedora 43.

Added packages for Ubuntu 25.10 "Questing Quokka".

Hey :)

Time for another release: a couple of new features/enhancements contributed by a kind person, a handful of bug fixes.

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

Here are the NEWS since the previous release:

Version 95.0 “Goodbye Stranger” 2025-09-14

New features and enhancements

• mkvmerge, MKVToolNix GUI: new chapter generation feature: a new placeholder has been introduced when generating chapters for appended files, <TITLE>, which will be replaced by the appended file’s title metadata. Implements #6151. Implementation by Jason Donenfeld.
• mkvmerge: the display matrix from MP4 files are now translated into appropriate roll and yaw values for output MKV files. Implements #6150. Implementation by Jason Donenfeld.
• mkvmerge: add --date argument to set the date metadata. Implements #6155. Implementation by Jason Donenfeld.

Bug fixes

• build system: fixed building with the upcoming Boost v1.89.0 by only requiring the header part of the Boost.System library as it’s been header-only since v1.69.0. Fixes #6143.
• mkvmerge: PCM packetizer: mkvmerge will now always write frames with 40ms of samples, no matter how long or short the frames in the source files were. Part of the fix of #6149.
• mkvmerge: MP4/QuickTime reader: fix exorbitant memory usage when reading PCM audio tracks. Part of the fix of #6149.

Build system changes

• Boost v1.74.0 or newer is now required.

Have fun 😁

Added packages for Debian 13 "Trixie".

Dropped support for Ubuntu 24.10 "Oracular Oriole".

Hey y’all.

This is probably the smallest release I’ve ever done :) Just one bug fix & one feature. Apart from that a ton of work went into the macOS build scripts in order to be able to build universal binaries. It’s not finished yet, and therefore the work’s not part of the release.

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

Here are the NEWS since the previous release:

Version 94.0 “Initiate” 2025-07-27

New features and enhancements

• MKVToolNix GUI: multiplexer: the “delete source files after multiplexing” job runner will now delete both files of an .idx/.sub VobSub file pair. Implements #6133.

Bug fixes

• all: fix compilation without FLAC. Fixes #6128.

Have fun 😁

Heyo.

It’s been a pretty quiet last eight weeks, but let’s do a release anyway. Couple of smaller fixes, nothing major.

An important note to my macOS users:

I’m aware that Apple has announced the upcoming end of their Rosetta x86/x64 emulation layer with macOS 28 (release likely in Autumn 2027). My MKVToolNix binaries are x86/x64 binaries, not ARM ones, therefore this impacts y’all. Unfortunately I do not have an ARM-based mac and do not plan on ever getting one. Therefore I will discountinue offering macOS binaries when Rosetta support ends.

I would very much welcome others to provide macOS ARM binaries in my stead and would gladly link to their efforts from MKVToolNix’ homepage. So far no one has stepped up to do so. The closest you get is probably the Homebrew project which offers MKVToolNix for ARM, too, with the important caveat that they only build the CLI tools, not the GUI. I do not know why; please ask them or offer your help getting their builds to build the GUI, too.

If you want to compile for macOS ARM yourself: good news, this is pretty easy. MKVToolNix contains my scripts that I use for building the x64 binaries, and those same scripts work for ARM macs, too. Please see this forum post for details. There a user & I discuss requirements & small issues they encountered, and the succeeds in building ARM binaries.

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

Here are the NEWS since the previous release:

Version 93.0 “Goblu” 2025-06-14

New features and enhancements

• all: updated the various lists that go into IETF/BCP 47 language tags: ISO 639 languages; ISO 3166 countries; ISO 15924 regions; IANA subtag registries.
• translations: added a Hungarian translation of the programs & man pages by Viktor György, John Fowler & Attila Zsigus (see AUTHORS).
• mkvextract: tags extraction: added an option --no-track-tags (short: -T) for not extracting tags associated with tracks.
• MKVToolNix GUI: multiplexer: the default regular expression for deriving the “forced display” track flag from file names for subtitles was extended to also match on the term signs. Implements #6094.
• MKVToolNix GUI: preferences: the revert buttons for the various “default regex for…” will only be enabled when the current text differs from the default, in other words: when reverting would actually change the text. Part of the implementation of #6099.
• MKVToolNix GUI: preferences: the GUI will now auto-upgrade the “default regex for…” to their respective current default values if they’re still set to one of the previous default values. Part of the implementation of #6099.

Have fun 😁

Dropped support for Fedora 40.

Added packages for AlmaLinux 10 & CentOS Stream 10.

Due to recent issues with my former Mastodon instance, I've moved to Hachyderm. Find me here at @mosu@hachyderm.io!

Hey y’all fine folks 😁

Here’s a new MKVToolNix release with a handful of bug fixes & enhancements. Nothing major in this one.

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

Here are the NEWS since the previous release:

Version 92.0 “Everglow” 2025-04-26

New features and enhancements

• mkvmerge: FLAC reader: pictures embedded into the FLAC file were already handled as attachments, but they were left in the codec initialization data as well. They’re now removed from the codec initialization data. See #6079.
• mkvmerge: FLAC reader: padding metadata blocks will now be removed from the codec initialization data. See #6079.
• mkvmerge: FLAC reader: embedded Vorbis comments will now be converted into Matroska comments or track/global header fields when available (e.g. TITLE will become the segment title & track’s name, LANGUAGE will become the track’s language). Copying of Vorbis comments that are converted into actual Matroska tags can be prevented with the usual options, e.g. --no-track-tags. The comments will also be removed from the codec initialization data. Implements #6079.
• mkvmerge, MKVToolNix GUI’s chapter editor: when reading simple (OGM-style) chapter files & no character set is given for the file, mkvmerge will try UTF-8 first before falling back to the system’s default encoding. Implements #6084.
• MKVToolNix GUI: multiplexer: the special drag & drop zones added in v91 are now shown by default in new installations.
• MKVToolNix GUI: in new installations the main window will now be sized at 75% of the screen’s resolution initially with a certain minimum initial size. This improves initial readability on high DPI screens that use screen scaling factors such as 150%.

Bug fixes

• mkvmerge: Ogg reader: during identification the track tags are now reported properly.
• MKVToolNix GUI: multiplexer: within the “additional options”, both track-specific ones & the global ones on the “Output” tab, it wasn’t possible to specify empty (zero-length) arguments. With the intended syntax of two consecutive single or double quotation marks the empty arguments were simply skipped. This was fixed, and it is now possible to specify e.g. --title "" in the global “Additional options” in order to force no title to be written ever. Fixes #6087.

Build system changes

• Windows build: the packaging/windows/populate_installer_dir.sh now expects the user to pass the Saxon-HE’s JAR file name to be passed with the -s or --saxon-jar parameter instead of the base directory for Saxon-HE. This allows newer versions of Saxon-HE to be used.

Have fun 😁

Added a repository for Fedora 42 but no packages for 91.0 as Fedora 42 comes with MKVToolNix 91.0 already. Starting with 92.0 I will offer Fedora 42 binaries as well.

Added packages for for Ubuntu 25.04 "Plucky Puffin".

Moving to Codeberg: the MKVToolNix git repository, issue tracker & wiki are moving from Gitlab to Codeberg on the weekend of March 15/16. Therefore the repository on Gitlab is currently archived. This news page will be updated once the move's finished.