mkvinfo: when the option `-p`/`-hex-positions` is used, element positions will be output regardless of the verbosity level.mkvpropedit: when changing track UIDs the referring elements in existing chapters & tags will be updated automatically, too.

mkvmerge: MP4 reader: ALAC tracks: the number of channels, sampling frequency and bit depth are now taken from the bitstream in order to fix bogus values on the container level.mkvmerge: Matroska reader: mkvmerge will remove the `icpf` atom headers if they're present in frames read from Matroska files.mkvmerge: AVC/h.264 parser: when additional SPS or PPS NALUs (with IDs that haven't been seen so far) are found mid-stream, mkvmerge will prepend all following key frames with all current valid SPS & PPS NALUs (just like when SPS & PPS NALUs are overwritten mid-stream).

Part of the implementation of #2709 and part of the fix of #2250. Now SPS & PPS NALUs are always writtenīefore the other NALUs. mkvmerge: AVC/h.264 parser: the order of the NALUs before each key frame was sometimes wrong: mkvmerge wrote SPS & PPS after SEI NALUs.MKVToolNix GUI: multiplexer: added a setting in the preferences for changing the location of the MediaInfo executable for when the user accidentally selected the wrong one.

`-info`, `-edit-headers` or `-edit-chapters` will make the GUI select the corresponding tool on startup even if no further file name is given.

MKVToolNix GUI: using one of the command line options.

Mkvtoolnix gui ver