NDI Framerate

I realised a behavior I was not expecting with the ndi consumer. i played a video with 30fps. that plays well in a screen consumer (1080p60). But on ndi, if i set the consumer to p60, it stutters and seems to leave out every other frame. somehow that makes sense. if I switch to p30, ndi studio monitor plays the video well.
so i have to be aware of my footage? I thought caspar will transcode? it to the proper format?
Thanks for some clarification