slow motion lost after sync from mac to iphone

Hi,

I can capture videos in slow motion but those videos play at normal speed once Sync them via iTunes.

1. Capture videos in slow motion.

2. The videos first play in slow motion in the iPhone. There is a time line slider to move the slo-mo effect back and forth.

3. I do a back-up via iTunes including videos.

4. After syncing, the videos in the iPhone appear in one album called "Slo-Mo".

5. In the thumbnail of the video clip I can see the small dial icon that all other slow motion videos have.

6. Playing the video shows a normal speed clip without the timeline slider under the video frames view.

The videos DO retain the slo-mo "effect" in Aperture and iPhoto also. Not in the iPhone after syncing.

Any hints to solve this? thanks

jp

iPhone 6 iOS8