I'm ingesting a large amount of footage and most of it comes in fine, but there are several clips that won't ingest - I simply get an error symbol and no explanation. Is it possible the clips are corrupt or have timecode breaks? Is there another program that would open these files so I could convert them to quicktimes? I tried MPEG Streamclip but that didn't work. I believe the camera was a Panasonic HVX or HPX so the video files have an .mxf extension.