First of all:
Photos should be tiff, 8bit RGB in the size you use them (16/9 SD means 1920×1080 pixel 72dpi). If the photo is too hard from contrast you use gauss blur 0,5-0,7. If its still flickering you throw the anti flicker filter on it or/plus frame shift +/-1 frame.
cheers
Rainer
factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems