mkvmerge does not recognize chapters in mpls (but gui does)
According to the man page, an mpls file (with chapters in it) can be passed to --chapters in mkvmerge. However, when I do so I just get the following:
$ mkvmerge --chapters /mnt/BDMV/PLAYLIST/00000.mpls -D -o test.mkv /mnt/BDMV/STREAM/00000.m2ts
mkvmerge v86.0 ('Winter') 64-bit
Error: Unknown chapter file format in '/mnt/BDMV/PLAYLIST/00000.mpls'. It does not contain a supported chapter format.Yet the same mpls file can be opened in Chapter editor of MKVToolNix GUI.