Version 67.0.0 "Under Stars" 2022-04-10
New features and enhancements
* all: IETF BCP 47/RFC 5646 language tags: when deriving the legacy language
element codes to use a language tag's ISO 639 code is also potentially
interpreted as an & its prefix is used as the legacy language code. For
example, "Yue Chinese" = `yue` is not part of ISO 639-2. However, there is
an extlang subtag `yue` with a valid prefix of `zh` ("Chinese"), and for
"Chinese" there is an ISO 639-2 language code: `chi`. In this example the
IETF language element would be set to `yue` and the corresponding legacy
element to `chi`.
* all: IETF BCP 47/RFC 5646 language tags: grandfathered language tags are now
supported.
* all: IETF BCP 47/RFC 5646 language tags: all deprecated subtags from the
IANA language subtag registry are now supported.
* all: IETF BCP 47/RFC 5646 language tags: all lists of valid subtags have
been updated from their respective authoritative sources.
* all: IETF BCP 47/RFC 5646 language tags: all in the IANA language subtag
registry are now supported, even those marked as deprecated and of type
'grandfathered'.
* all: IETF BCP 47/RFC 5646 language tags: reduced the maximum number of
extended language subtags that are present in a valid tag from 3 to 1 in
compliance with RFC 5646 section 2.2.2.
* all: IETF BCP 47/RFC 5646 language tags: all language codes reserved for
private/local use (`qaa`–`qtz`) are now supported.
* all: IETF BCP 47/RFC 5646 language tags: Digital Cinema Naming Convention
language codes that fall into the IETF BCP 47 range of "private use" tags
(`qaa`–`qtz`) are now replaced by their IETF BCP 47 equivalents during
normalization (e.g. `QMS` → `cmn-Hans`).
* all: added a new translation to Chinese Simplified (Singapore) by Dian Li.
* mkvmerge, mkvpropedit: added a new command line option called
`--enable-legacy-font-mime-types`. With this option on the two programs will
use the same legacy MIME types for fonts whenever new attachments are added
(both programs), when reading existing attachments (only `mkvmerge`) or when
replacing existing ones (only `mkvpropedit`).
* mkvmerge, mkvpropedit: IETF BCP 47/RFC 5646 language tags: added a command
line option `--normalize-language-ietf <mode>` which turns on normalization
of IETF BCP 47 language tags to either their canonical (mode `canonical`) or
extended language subtags form (mode `extlang`) or turns it off (mode
`off`). If the option isn't given, language tags will now be normalized to
the canonical form.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: ISO 639-3 and 639-5
languages will now be used by default.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language editor
dialog will now show warnings in several cases: when deprecated tags are
used; when the tag's canonical and/or extlang forms differ from the user
input.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language editor now
has a button to replace the current tag with a normalized form (canonical or
extlang) if those differ from the current tag.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: added an option in the
preferences to always normalize all language tags to their canonical or
extlang forms or to turn normalization off. Can also be enabled from the
language editor dialog.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language dialog now
shows a warning if a variant is used with a prefix that isn't in the
variant's list of suitable prefixes. It'll also say if the corresponding
canonical/extlang forms would have a suitable prefix.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language dialog now
shows a warning if a script is used with a language for which it should be
suppressed.
* MKVToolNix GUI: multiplexer: the track property group boxes in the
scrollable pane are now collapsible & expandable, saving their state over
restarts of the GUI. This is in preparation of adding many more track
properties in future releases, allowing the user to hide parts they don't
use all that often.
* MKVToolNix GUI: multiplexer: if the option "use legacy font MIME types" is
enabled in the preferences, the new command line option
`--enable-legacy-font-mime-types` will be passed to `mkvmerge` in order to
have it remap the MIME types of existing attachments, too.
Bug fixes
* all: IETF BCP 47/RFC 5646 language tags: variants aren't validated wrt. to
prefixes anymore as BCP 47 doesn't actually pose restrictions on them,
saying only that prefixes "are suitable sequences" for use with the
variants. What is now verified, though, is that no variant is used multiple
times within the same language tag.
* build system & MKVToolNix GUI: fixed detecting the presence of & the
compilation with the multimedia module of Qt version 6.2.0 and newer.
* build system: fixed compilation on Unices other than Linux & macOS
(e.g. FreeBSD).
* MKVToolNix GUI: job queue: fixed compiling in the audio player code for the
the "play audio" end-of-job action.
* MKVToolNix GUI: multiplexer: recognizing added XML chapter, segment info or
chapter files required the XML declaration & root node (e.g. `<?xml…?> …
<Chapters>` for chapters) be located within the first 1 KB, which wasn't
enough for files that contain a lot of comments at the start like the
included `example-chapters-2.xml`. The detection range was extended to 10
KB.
Build system changes
* build system: the provided Windows binaries are now compiled with Qt 6. A
drawback is that certain audio formats aren't supported anymore by Qt for
the "end of job" sound notification playback, notably the Ogg file format &
the Vorbis audio codec. MKVToolNix therefore now ships Opus-in-WebM files
for the same purpose.
* The bundled `fmt` library was updated to v8.1.1.
* The bundled `nlohmann-json` library was updated to v3.10.5.
* The bundled `pugixml` library was updated to v1.12.1.
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