Video not smooth

Hi,

I use a HDMI Splitter to send video from my AVR to the TV and to hdmi-AV converter for Hyperion Ambilight.

When i let all default preset from KODI, nothing was working : no display under kodi (only under kodi, not windows) and no signal in the AV converter

I had to change video mode to Windowed Mode in video menu, so that TV and video converter works both together

but now the video is not smooth when playing 1080p or SD video

It’s not a CPU/GPU problem (about 15-30%)

I found some post on the forum talking about Frequency problem. I tryed to put my windows in 50hz and enabled the option under kodi, but no change.

When there is a travelling in the scene of the video, there is a small delay between a group of line in the top 1/3 of screen. It’s a bit frustrating.

Anyone has meet this problem and solved it ?