Merging MP3 music with still image

I find that other options than quicktime work best for this and suggest you post a version of this question in the iMovie discussion list (both HD and 09), as well in the iPhoto list. Iphoto has a fine slideshow option that lets you merge music with photos. Easy and on all Macs. (Here is the iPhoto tutorial for slideshows... http://www.apple.com/findouthow/photos/#slideshow)

Also one can check out the Aperture list. Aperture has a wonderful slideshow option that allows direct upload to YouTube. It does cost though.
Other options include Final Cut Express, though that is expensive overkill for this simple project.
If you have iMovie 09, you can put the image in, put the time to the time of the music, drag the music file in, upload to YouTube. Feel free to email me, but I advise checking out the Apple tutorials.
Hugh

Adding a still image to an audio track is easy with QuickTime Player Pro:
Open the image file with QuickTime Player Pro
Select All (Command-a) and Copy (Command-c)
Switch to the audio track
Select All (Command-a) and "Add to Selection & Scale" (Edit menu)
Save As and give the file a new name.

It would require the Pro upgrade to merge the two files into one .mov file.
QuickTime Player can be used to open dozens of image formats and .jpeg is the most common.
If the file can't be opened by QuickTime Player (or the Pro upgrade) then the file is possibly a "raw" (uncompressed) format that may need conversion.