What a fabulous program - a Swiss army knife not only for video, but audio, as well. I found this looking for a program that would do good and quick conversion of those .flv files you get at some many sites when you want to grab a video.
When I looked at all the kinds of audio and video files this program would convert, I was totally blown away. It handles dozens of common and obscure file types. It's got to be a power-user's delight, but it's great for simple stuff, too. For example, it gives you a much faster way than iTunes to convert batches of MP3s to m4as, and of course, can quickly turn your m4as to MP3s if you need to. Change a .wmv file to a .mov, or vice versa? Piece of cake. The interface is simplicity itself, but if you look "under the hood," there is incredible horsepower here to change all sorts of settings for video/audio conversion -- stuff that goes way beyond my understanding of how these files are put together, but if you're a power-user, the settings are there for you.
With iVideo Converter, I am now confident that no matter what video or audio format I come across, I can find a way to convert or modify it to suit my needs. What could be better? A previous reviewer called this the "Graphic Converter" for video and audio files -- that's a real compliment, and in this case, well-deserved. Best of all, all these features and functions come for a little less than $10! I'm now a delighted registered user and recommend this program without reserve to anyone needing to manipulate and convert video and audio files.