Aha, here it is, convert image.gif image%02d.png
then ffmpeg -r 24 -i %02d.png -an image.avi from http://www.nuxified.org/article/create_video_animations_with_inkscape_imagemagick_and_ffmpeg
Aha, here it is, convert image.gif image%02d.png
then ffmpeg -r 24 -i %02d.png -an image.avi from http://www.nuxified.org/article/create_video_animations_with_inkscape_imagemagick_and_ffmpeg