* mkvmerge: MPEG transport stream reader: fixed a crash introduced in v81 that occurred when there was at least one PCM track that wasn't copied from the transport stream file. This behavior can be turned off in the preferences. Currently the GUI considers this to be the case when a playlist contains the same item at least five times. * MKVToolNix GUI: multiplexer: when scanning for Blu-ray playlists the GUI will now ignore playlists that are likely meant for menus. * MKVToolNix GUI: multiplexer: when adding files the GUI can automatically enable the 'hearing impaired' flag for audio and subtitle tracks if the file name contains the word 'cc' or 'sdh' delimited by certain characters (configurable). In `mkvpropedit` it's called `alpha-mode`. * mkvpropedit, MKVToolNix GUI's header editor: added support for the 'video alpha mode' track header property. * mkvinfo: added support for the 'video alpha mode' track header element. Workaround for the player issues listed in #3643.

alpha channel data in VP9 with a 'Block Addition ID' value of 1, which is also its default value. * mkvmerge: added a new hack `always_write_block_add_ids` that can be used as a workaround for players that don't support the handling of missing 'Block Addition ID' sub-elements of 'Block More' elements in block additions properly.

* mkvmerge: file identification: the JSON identification output schema version has been bumped to 19. * mkvmerge: MPEG transport stream reader: teletext subtitles intended for hearing impaired people (type 0x05) are now marked as such via the appropriate flag in the track headers. * mkvmerge: Matroska reader: the file's timestamp scaling factor will be reported in JSON identification mode as the container property `timestamp_scale`.

* mkvmerge: Matroska reader: the 'video alpha mode' track header property will be reported in JSON identification mode as the track property `alpha_mode`. * mkvmerge: Matroska reader: the 'video alpha mode' track header property will be copied to the output file if present.

MKVToolnix 79.0 for ipod instal