Now we are in a position to pinpoint the frames that are most useful for us. As we can remember from the previous example in which we used the same video, it comprises of 45 frames. Thus, our call to montage with a 5 x 9 grid as input is rather intuitive, since it will fit all frames without leaving any empty spaces. As you can easily observe, the ball enters our scene at the 13th frame and exits at the 42nd frame. Of course in this example the number of frames we would exclude knowing this information is small (12 at the beginning and 3 at the end), but it still is 1/3rd of the entire video. However, imagine a long video with only a few frames containing motion. This overall inspection tool would be a lifesaver in terms of time and effort. It can also be invaluable in artistic or other video editing tasks, since we can quickly skim through chunks of frames and pinpoint the ones we want to process.