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I trying to create a video from a landscape image that moves from left to right of the image.
One form that I thought I can get this done is firstly generating N cropped images from the original one, each of them cropped more and more to the right and then apply some command like this one:
ffmpeg -framerate 1/X -i img%d.png -r 25 -pix_fmt yuv420p out.mp4
This for sure works but is not the quickest and cleaning form to do it. Are there a better method to accomplish this?
You can just use the crop filter.
ffmpeg -loop 1 -t 10 -i img.png
-vf "crop=w=W:h=ih:x='(iw-W)*t/10':y=0"
-r 25 -pix_fmt yuv420p out.mp4
The crop filter crops the image to Wxih pixels where ih is the original height. You should substitute W with your target width in pixels. The position of the top-left corner of the crop window is set by the x and y expressions.
Since you only want to move left-to-right, y is set to a fixed 0. For x, the expression (iw-W)*t/10 governs the horizontal position of the crop window. t is the processed frame's timestamp in fractional seconds. W is substituted with the target width. iw is the input width. The crop will start from the left edge and end at the right edge at t = 10 seconds.
For an image sequence of 10 seconds, use
ffmpeg -i img%d.png
-vf "crop=w=W:h=ih:x='(iw-W)*t/10':y=0"
-r 25 -pix_fmt yuv420p out.mp4
ffmpeg -y -framerate 1/10 -i test.jpg -vf "crop=w=1080:h=ih:x='(iw-1080)*t/10' :y=0" -r 25 -pix_fmt yuv420p outpanoramic.mp4
img%d.png but you're applying to a single image. I'll modify my command for this case.