digital Photoframe Agfa AF 5075 EU didn't display pictures anymore

Since a long time we have a digiatl Photoframe AF 5075.

But since some longer time it didn't display always the photos put onto an SD card.

Now I have the solution. The photos are to large, taken by the camera.

The solution was to convert the photos to a lower size by a tool from the ImageMagick toolkit.

cd photos
mkdir resize
cd resize
for d in `ls ../*`; convert $d -resize 50% `basename $d`

and the resized photos are displayed again.