Mkvmerge: SRT reader: entries with a duration of 0 or less will now be skipped. MKVToolNix GUI: multiplexer: added controls for all the video colourinformation & the video projection information. The JSON identification format version number has been bumped to v15. The properties are reported for container types for which mkvmerge supports reading them (Matroska & MP4). Mkvmerge: added colour information, colour mastering meta information & video projection information properties to the JSON identification format. That way one bogus timestamp cannot cause the rest of the frames to not be interleaved properly with the other audio & video packets. Mkvmerge: HDMV PGS subtitles: mkvmerge now tries to detect bogus timestamps (where the current timestamp is two hours or more after the previous timestamp) & correct them to something more sensible (1s after the previous timestamp). MKVToolNix GUI: preferences: switched the order & wording of controls in the “enabling items” panel to make it clearer that certain controls define exceptions. Mkvmerge, mkvextract: HEVC/H.265: access unit delimiter NALUs will no longer be discarded, neither during muxing nor during extraction. srt as SRT subtitle files, enabling the creation of empty SRT tracks. Mkvmerge: SRT subtitles: mkvmerge now accepts empty text files with the extension.
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).
On top of them sits MKVToolNix GUI, an easy-to-use program making the functionality of those command-line tools available as a GUI. Mkvpropedit can edit properties such as header and chapter information or attachments without remuxing. Mkvextract can extract tracks from Matroska & WebM files to other formats.
Mkvinfo allows one to get information about the tracks in Matroska & WebM files. Mkvmerge is a tool to create Matroska & WebM files from other formats. MKVToolNix consists of the following command-line tools. It is the de-facto reference implementation of a Matroska multiplexer. MKVToolNix is a set of tools to create, alter and inspect Matroska & WebM files under Windows, macOS, Linux and other Unices.