instal the new version for windows clever FFmpeg-GUI 3.1.2

* MKVToolNix GUI: multiplexer: the 'emphasis' and 'stereoscopy' combo-boxes now have a much smaller minimum width, allowing to make the whole 'properties' pane much smaller again. This fixes the timestamp calculation if the sampling frequency in the core & in the extensions are different. If found, it'll start processing from there instead of from the start.

* mkvmerge: DTS reader: if a DTS stream doesn't start with a DTS core but a sub-stream element (EXSS), the reader will now look for a core. the list of recently used destination directories). * MKVToolNix GUI: preferences: you can now use the 'delete' key to remove entries from simple list widgets for strings (e.g. * MKVToolNix GUI: header editor: in order to reduce confusion with users non that versed in Matroska elements, the naming of the two 'language' track properties has been changed: the old element is now titled 'Language (obsolete)' & the current, IETF BCP 47 based one is simply called 'Language'. * MKVToolNix GUI: multiplexer: when adding Blu-ray playlists the dialog allowing the user to select the playlist to add will now show audio & video track properties as well (pixel dimensions for video sampling frequency, channels for audio). * MKVToolNix GUI: multiplexer: added the option `-stop-after-video-ends` to the dialog for additional command line options. * MKVToolNix GUI: multiplexer: when adding files the GUI can automatically enable the 'forced display' flag for subtitle tracks if the file name contains the word 'forced' delimited by certain characters (configurable).

* mkvmerge: MPEG TS reader: added support for colors in teletext subtitles. * mkvmerge: AV1: added support for reading Dolby Vision from AV1 IVF & OBU streams.

Instal the new version for windows clever FFmpeg-GUI 3.1.2