# Version 73.0.0 "25 or 6 to 4" 2023-01-02
## New features and enhancements
* mkvmerge: greatly enhanced the speed of Base64 decoding which is used used
e.g. when reading pictures embedded in Ogg or FLAC files or for binary data
inside XML chapter & tag files. Even small blocks of data could take
* mkvmerge: added support for reading HEVC/H.265 video from FLV
containers. Implements #3466.
## Bug fixes
* mkvmerge: splitting: fixed a typo in the string output in GUI mode regarding
the timestamps before which splitting was done. See #3421.
* MKVToolNix GUI: job output: after having run multiple jobs the "Clear
output" functionality only reset the visible parts. However, using the "save
output" function would also save the output generated before the user used
"clear output". Now only the output after the last use of "clear output" is
saved. Fixes #3438.
* build system: when probing for the FLAC library the Ogg libraries will be
linked with the compiled test program as well. This fixes detection if the
`pkg-config` settings for FLAC don't list Ogg & the linker doesn't find the
library automatically (e.g. for my macOS builds). Fixes #3439.