[LAU] HOWTO create a simple youtube video for musical purposes

Hello all, I have a musical piece of some 4 minutes, recorded in Ardour and currently saved as an ogg file. I would like to make it Youtube compatible in the most simplest way. Like in having one single picture being shown while the music plays. Not even two or three, just one. And the music. That would be the video. The picture is one I've taken, and is of ridiculously large format which I can resize using Image Magick. How can such a video be created ? I have no idea how to do that. Hopefully this thread could also be useful to others. Much thanks in advance ! Cheers. NP: "The Foundation" - Thievery Corporation