Copy of AVI video to iMovie shows no image, just sound.
My AVI video from 2012 is playing only sound, even though I'm editing visible image frames in iMovie 09. I'm using iMAC OS X El Capitan 10.11.4. Why can't I see the video? It plays fine in iPhoto and on the desktop, but not in iMovie.
iMac (21.5-inch Mid 2010), OS X El Capitan 10.11.4