[MPlayer-users] Controlling the numbering of JPEG frames?

[egf05 at doc.ic.ac.uk]

Dear all,

I am extracting keyframes from a video, using this command:
mplayer ./video.avi -noframedrop -nosound -vo jpeg -vf framestep=I -zoom

This works perfectly, and frames are numbered from 00000001.jpg and this number
is incremented for each new decoded keyframe. Is it possible to control the jpeg
numbering, so that the JPEG filename would correspond to the frame number in the
video instead (note I cannot predict the position of keyframes in my video)?

Thanks a lot,
Eric