Solution using ffmpeg:
You can use the select filter in ffmpeg to adjust the order of frames without needing to extract and rename them manually. Unfortunately, ffmpeg doesn't natively support "rotating" frames within a loop in one command, but a workaround can be to duplicate the frames and trim them, so the loop starts at a new point.
Here’s a more streamlined approach:
- Duplicate the GIF (append the frames of the GIF to itself).
- Trim the new starting point and cut the GIF down to its original length, ensuring that the loop is still seamless.
The command to do this would look like this:
ffmpeg -i input.gif -filter_complex "[0:v]split[original][copy];[copy]trim=start_frame=X:end_frame=N,setpts=PTS-STARTPTS[part1];[original]trim=start_frame=0:end_frame=X,setpts=PTS-STARTPTS[part2];[part1][part2]concat=n=2:v=1[out]" -map "[out]" output.gif
Explanation:
split: This duplicates the GIF stream.trim: Cuts the frames at specific points (start_frame=Xandend_frame=Nwhere X is the frame you want to start with, and N is the total number of frames).concat: Combines the two parts back together so the loop remains seamless.setpts=PTS-STARTPTS: Adjusts the presentation timestamps so the frames play sequentially.