MKVToolNix GUI: multiplexer: when adding multiple files at once, the GUI will sort file names with numbers the way a human would expect it to.

MKVToolNix GUI: multiplexer: fixed escaping the `mkvmerge` argument in the 'Show command-line options' dialog for the 'Windows (cmd.exe)' mode MKVToolNix GUI: multiplexer: when the option 'use legacy MIME types for font attachments' is enabled, the GUI will now use `application/x-truetype-font` for font collection files.

mkvmerge, mkvextract: HEVC/H.265 parser: fixed the programs aborting when parsing VPS or SPS NALUs with invalid content due to unhandled exceptions mkvmerge: HEVC/H.265: appending Matroska files with HEVC tracks might lead to the loss of the first couple of frames from each of the second and all following files the code 'Ga' could be interpreted as the 639-2 alpha-2 code for 'Irish' or as the name of the language called 'Ga') and only worked with languages whose name was at most three letters long. all: IETF BCP 47/RFC 5646 language tags: when looking up a language for a two- or three-letter code, the programs will no longer compare that code with language names as that was unintended, ambiguous (e.g. a valid tag with a country code as in `de-CH-1996` is recognized as valid while two generally known variants that aren't allowed together as in `de-1901-1996` is recognized as invalid). all: IETF BCP 47/RFC 5646 language tags: fixed validating extended language & variant subtags against their allowed prefixes (e.g. MKVToolNix GUI: multiplexer: added an option in the preferences for turning off the colored boxes indicating which file each track belongs to MKVToolNix GUI: multiplexer: pressing the keyboard shortcut for the track's anguage' label (Alt+L for English) will now open the language dialog all: IETF BCP 47/RFC 5646 language tags: updated the various lists of valid subtags from the official specs all: IETF BCP 47/RFC 5646 language tags: implemented support for Alpha 2 country codes of the 'user-defined' category: `AA`, `QM`–`QZ`, `XA`–`XZ` and `ZZ`

all: IETF BCP 47/RFC 5646 language tags: added support for language families from ISO 639-5 that aren't part of 639-2

MKVToolnix 80.0.0 free