[FFmpeg-user] How to extract keyframes from a video with the original frame ids

[Dave Lloyd]

Hi all,

I would like to do something like:
ffmpeg -i <video> -vf "select=eq(pict_type\,I)" -vsync vfr frame-%04d.jpg
except that I would like the frame numbers to preserve the original 
frame ids, e.g.,
frame0000.jpg
frame0005.jpg
frame0011.jpg
...etc

Is there a convenient way to do this with the existing command line?
If not, is there an easy hack I can make & rebuild from source?

Many thanks,
Dave Lloyd