I am working on a project that i need to do some editing.. The original files off the camera were mpg that would not have sound in quicktime or imovie.. So i extracted the audio in ffmpegx and put it back in using quicktime pro, and it saved as a .mov. So i figured great, it will actually work because they play fine in quicktime.. Now when import the clips into imovie.. there is just sound, with no video. What is the problem?