file converter

Does anyone know of a free video file / format converter that does not compromise the quality of the video when watching it after its been converted? .... turns out Windows Movie Maker does not supports videos recorded on my iPhone nor my digital camera :(

So, I was recording with Loilo. It's a pretty nice recording software to be free. It's very easy and simple to use. Only leaves a watermark unless you edit the video with Loilo Scope. (I record with Loilo and edit with a separate software because I'm broke atm) So, when I record with Loilo, my...