[FFmpeg-user] set total number of output frames when extracting pictures from movie

[Peter Dickten]

Hi,
I'm extracting pictures of movies using ffmpeg.
In the past I was abled to specify the number of frames to export (total number, not fps!)This was very handy, because I sometimes needed more pictures than the movie contained (because of gaps in the recording)and ffmpeg filled the gaps with duplicate pictures.
Now I can't find my old shell command and I'm either too stupid or too blind [or both] to find the command line parameter :-(Can you give me hint!
Thanks a lot!J.F.Sebastian