Kdenlive ver 19.12.3, MLT ver 6.20.0, installed with sudo apt-get install kdenlive.

My Kdenlive has worked just fine. But after using settings> config kdenlive> timeline> [change track height], the track does not run smoothly and severe stuttering occurs in the monitor. I realize that track height would not cause the stuttering, and I must have changed something in settings or elsewhere that cause the problem.

I removed and reinstalled both ffmpeg and kdenlive and the stuttering remains. I have seen posts mentioning proxy settings - my default installation has proxy off. I will only be doing simple cut and paste editing. I have only limited knowledge on using kdenlive, althoh I was in motion to expand my use of it a bit.

Any easy suggestions that might eliminate the stuttering problem.

To see if there are any packaging issue from the distributor, please try with one of the three official packages from the download page: https://kdenlive.org/en/download/

o.k.. I will try later today and report back. But please don't miss my point, everything was working fine until I entered into Settings>Configure Kdenlive. A fresh reinstall by the method that was done originally did not resolve the problem?

I uninstalled the 19.12 version, did a software update, and added files when the install of 20.04.1 balked. That is, did a lot of stuff, but cannot accurately describe what I did.

Kdenlive 20.04.1 installed, but still has the stutter? Since it is a new install, that seems to rule out what I originally thought was goofing something up in Settings. It would seem something is corrupted that supports the app. Any more suggestions what might identify the problem for a fix?

Hello mbower,
what setting did you choose in: Monitor > Preview Resolution? Maybe choose a lower one and try if the error is fixed.
This helps especially with high resolution videos.

@mickae

I did as you suggest, dropped res down to 540p, and problem persists. I would repeat, everything worked fine for some time, then when I started to optimize/configure, something got goofed up.

The files are .MOV and they work just fine on another computer - so I do have an option. My guess is that some file in the linux OS got goofed up. I would just like to have kdenlive working on the computer I normally use.

mark