iPhone 4 Video: slow in FCE HD
I am using Final Cut Express HD 3.5.1 on my new MacBook Pro and am in the early stages of making a home movie using video (.mov files) taken on my iPhone 4 and my wife's iPhone 3GS. I tested a .mov video file taken on my iPhone 4 in FCE HD and I noticed that when i test the clip to figure out my in and out points that the audio plays seamlessly, however the video is delayed/slow. When i drop the clip into the timeline, the video is still delayed/slow. When I rendered the video, it then played fine.
In the past when i have pulled video from my Sony HDR-HC7, the video always played fine right from the beginning w/ out any rendering.
What am i doing wrong that is preventing the iPhone videos from playing smoothly so i can properly test the in and out points and then drop it into my timeline?
Do my video files need to be converted into a different file type?
Thanks in advance for your help!
Mac Book Pro, Mac OS X (10.7.2)