I found another thread with my problem:
https://yabb.jriver.com/interact/index.php?topic=131139.0And this is solution:
If you have a Nvidia 20xx/30xx video card and you encounter micro stutter while using madVR
without actually dropping frames, please try the following:
◦ In the Nvidia control panel, go to Manage 3D Settings, scroll all the way down and set
Vertical Sync to 'On'. You can do this either globally or just for the media player exe.
◦ In the madVR settings, go to rendering -> general settings, and uncheck 'enable automatic
fullscreen exclusive mode'
◦ In the madVR settings, go to rendering -> windowed mode settings, and set 'how many
video frames shall be presented in advance' to 1 or a maximum of 3
Last one solve my problem. I set to 1 and stutters gone.
Thanks to everybody. Such a helpful community.