ffmpeg - Image - Create a video from images

ffmpeg -r 1/5 -start_number 2 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

img001.jpg
img002.jpg
img003.jpg

ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' video.mp4

ffmpeg -y -framerate $(frames) -pattern_type glob -i '$(path)/*.jpg' out.mp4

Create a video with, for instance, 1×4 (4 frames per second).

ffmpeg -framerate 4 -fflags discardcorrupt -pattern_type glob -i '*.jpg' video.mp4

Then, create a list.txt file with the following contents to loop the video:

list.txt

file 'video1.mp4'
file 'video2.mp4'
file 'video3.mp4'
file 'video4.mp4'

Then

ffmpeg -f concat -i list.txt -c copy output.mp4