I renamed my files into these (just so the app could find the result faster),
- DVDMS00639.mkv
- MKON00060.mkv
And then processed it using this command,
./jav-it catalog -d $MY_DIR --force-update --video-naming-method=content-id --directory-naming-format='{{CONTENT_ID}}' --data-source=dmm
Result directories after been catalogued,
- dvdms00639
- mkon00060
My confirmation is right, the app is able to produce the CONTENT_ID for the directories, but failed to set value for <uniqueid type="DMM"></uniqueid> using the CONTENT_ID for the .nfo file.