Remux-framestor [verified] -

You can identify these files by their naming convention, which typically includes the movie title, year, resolution (e.g., 2160p), source (UHD BluRay), and the group tag at the end: -FraMeSToR or where to find their official guides

ffmpeg -i input.mp4 -vf fps=1 output_%03d.png Remux-framestor

Here is where the distinction matters.

Here's an example of how to remux a video file from MKV to MP4 using FFmpeg: You can identify these files by their naming