But there are many reasons for this to happen such as an incorrectly made CD/DVD.
But I did find the manual and jpg as well as jpeg files are supported.
Bob
Will a DVD that contains JPEG pictures play on Model
BDP S470. I get the message "No Files" when trying
to play

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic