FranciscoG

ffmpeg -i input.mov -r 0.25 output_%04d.png

# -i  followed by video file sets input stream
# -r  set framerat.   1 = 1 frame per second. 
# and then set the output file with the number replacement

# more info:  https://ffmpeg.org/ffmpeg.html#Main-options
# https://superuser.com/questions/135117/how-to-convert-video-to-images