Please explain how to show jpeg image on S video port
First, use the instructions on other threads of this mailing list to
enable a frame buffer on the S-video.
Use a utility like 'fbi' (http://packages.debian.org/etch/fbi) to
display your JPEG using the appropriate framebuffer (such as /dev/fb1,
if that is the one you redirect to the S-Video port). You can get
'imagemagick' from Angstrom, so I don't suspect getting 'fbi' will be
difficult.