Video
ffmpeg
pan on image from left to right
ffmpeg -loop 1 -i img.png -filter_complex "[0:v]crop=ih:ih:iw/(25*15)*n:0,trim=duration=15,scale=-2:720" -c:a copy -pix_fmt yuv420p test.mp4
ffmpeg -loop 1 -i img.png -filter_complex "[0:v]crop=ih:ih:iw/(25*15)*n:0,trim=duration=15,scale=-2:720" -c:a copy -pix_fmt yuv420p test.mp4