www.makemkv.com

I'm seeing some really weird slowness with v1.17.8 when ripping\processing MKV's that are on my nvme drives. For some reason the processing speed drops to sub 5.0x. When i cancel the job and close the GUI there is still the Makemkv console application.exe process running in the background taking up 15-20% of the CPU.
stuck process
This is processing the same file with the different versions.
v1.17.8 it's processing at ~7.8 M/s [1.8x], it will take 48+ minutes (didn't want to wait for it to finish)
v1.17.6 is processing at 1028 M/s [239.9x], finishes in 23 seconds.
Not sure what is going on with v1.17.8 but it's the first time I've see this weirdness in many many years of using this excellent software.

OS details: Windows 11 24H2

You are using MakeMKV to rip an MKV to an MKV?
Are you doing this to alter the contents?
Remove audio or subtitle streams?

I never tried using MakeMKV to rip an MKV to an MKV so never experienced your issue.
While I cannot presently use MakeMKV until my issue is solved, I can possibly test after my issue is fixed.
At the very least I could test if I also experience your issue.

Yup, I'm using MakeMKV to strip out and unneeded languages for audio and subtitle, also to strip out the Lossless audio (7.1,6.1). I find it quicker than using Mkvtoolnix to do the same processing. I then shrink them down with Staxrip.

just really weird that there is such a massive speed difference between the 2 versions using the same settings.

I can't repeat this, it's working fine for me.

However, looking around here at the problems posted, I'm thinking that 1.17.8 for any platform is... not good.

I'm having the same issue. Running 53 min now running at .04??? 4th gen M2. was ripping at 150X