flowreen91 wrote:Only solution would be to upgrade your system until it massively outperforms the video player requirements... or resize to 480p instead xD
Can't wait to burn $3000 on a 5090 to maybe be able to play 1440p60 videos without stutter using 25% of the GPU power...

Jokes aside... did more tests and although not perfect, PotPlayer runs smoother for me than MPV (SMPlayer) with either EVR Custom Present and these settings:

or MPCVR with these settings:

Besides the 30 seconds long dolly from Unbelievable 2160p DV HDR I posted before, the other best testing video file I have is a 30 seconds panning intro from Top Boy 1080p SDR (8MB)
Using those files on 'Repeat' is easy to catch any stuttering and Dropped/Skipped/Delayed frames by eye (sometimes they're not reported in stats/info).
It seems to me that maybe this problem is related to a bad handling of multithreading, because the lower number of threads I use in the video decoder (either LAV or MPC) and SVP seem to show better results, with less stutters or Dropped/Skipped/Delayed frames. But for 2160p content is impossible to go single threading, the lowest I can go is 2 or 3.
I'm doing more tests creating custom display modes with custom refresh rates in CRU , but so far no luck, still stuttering showing up.
Will keep testing and reporting any findings. Hope I'm not the only one interested in fixing this...