If you have a Mac, you might like VideoConverterPro. Never had an issue with it and since it's on the Mac Store, you don't have to worry too much about viruses. Can't remember if it's free or not because I already own it and the price button is replaced with the "open" icon. Here's a link:
If you are on the PC, I'm afraid I don't have suggestions other than maybe Adobe Media Encoder? I think that's what I used way back when I was using adobe products. You can download a free trial, so no harm to try it out.