www.makemkv.com

Just another data point: I watched M3GAN 2.0 via the plex app on a shield last night and it was a mess. It not only drops audio for a moment at a seamless branching point, but it comes back very out of sync and stays that way until restarting playback at a point after the branch, such as waiting >10 ...

FWIW Using Oracle Java 8 (instead of a more recent OpenJDK) did make a difference for this disc, and it identified 00972.mpls as "FPL_MainFeature".


Name: How to Talk to Girls at Parties (English)
Comment: FPL_MainFeature
Source file name: 00972.mpls
Duration: 1:42:41
Chapters count: 16
Size: 28.8 ...

I'd totally blanked on the fact that I could just mount the ISO using the OS and get to the BDMV files that way, instead of having to use makemkv to extract them. Once I did that, MKVToolNix was able to convert the m2ts file to an mkv without any trouble, thanks.

This is a Finnish movie, distributed by Blue Water Content. The disc is burn-on-demand. The case has English writing but the disc itself has some German on it, which is a bit odd.

If I open it in makemkv I see a single 7GB track. All attempts to save it to an mkv file fail at the end. I tried ...

Just tried The H.K. Triad from Mega Star and got the same sort of problems. An ISO can be backed-up and plays okay in VLC, but trying to extract the video tracks with makemkv mostly results in super-long videos of nothing.

FWIW I Just ran into trouble with the same DVD as the first post ("A Chinese Ghost Story 2" distributed by Mega Star).

What's different now is that that after showing a big pile of warnings and attempts to work around it, it didn't fail, but instead produced an mkv file that has lots of playback ...