MakeMKV v1.17.8 ripping very slow with HDD based mkv's

[A_Man_Eating_Duck]

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

Stuck process.png (5.69 KiB) Viewed 1345 times

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)

v1.17.8.png (5.68 KiB) Viewed 1345 times

v1.17.6 is processing at 1028 M/s [239.9x], finishes in 23 seconds.

v1.17.6.png (5.85 KiB) Viewed 1345 times

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

[dyoung]

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.

[A_Man_Eating_Duck]

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.

[flojo]

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.

[cx5400]

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

[FunktasticLucky]

I had the same issue. I had just updated my TrueNAS to the new version and this started. I thought it was my server.

It does it both on Bluray ripping AND MKV to MKV. It starts out fast and quickly drops and then over time it just keeps getting slower and slower. I was at 400KB/sec at one point. I even tried copying it to my local storage and then trying to rip it. Same thing. The only thing I didn't attempt was going Local storage to Local storage.

I'm running Windows 11 24H2 and it's ripping from a TrueNAS SMB share to a different SMB share through a 10Gb local network. Sustained transfers of near 800MB/sec when doing a copy from one to the other through Windows. MakeMKV will start at about 400MB/sec and then quickly drop to about 30MB/sec (within 5 - 10 sec) and then will just keep dropping after that. I let a file go for 6.5 hours and came back to it at the 400KB/sec transfer speed. I just cancelled it and then decided to roll back to 3.17.6. Everything works now.

[Billycar11]

i recommend you guys email mike
hes very good at fixing things once you get in contact with him.
support@makemkv.com

[nyh320]

I have the same problem. I have downgraded to 1.17.6 and the problem went away. You can find the old versions here https://www.makemkv.com/download/old/ .