creating a slideshow for your SD-card capable TV using digikam

select your preferred pictures and copy them to a separate folder
start digikam and select all pictures
use ‘Image‘ -> ‘Auto Rotate/Flip using EXIF Information‘ to correct the orientation of the images (this is required since otherwise the resizing step will produce bad results)
open ‘Batch‘ -> ‘Resize Images‘
select ‘Type‘ : Proportional (2-dim) with the options width=1024, height=720, border=0
click ‘Apply‘