Video Seek video without playing

Hello,

Im making a video player that has a slider showing the current position of the video. I want the user to be able to slide the slider to any point in the video and see a preview image of the frame at the current slider spot before playing.

The user should be able to slide the slider around, as the slider moves it should show a still frame of the video at that spot without actually playing it. Then when play is pressed start playing from that spot.

I tried doing that using the VideoPlayer but sometimes it dont work.

Anybody knows how to code that?

Thanks