Demuxer gif [CompuServe Graphics Interchange Format (GIF)]:
GIF demuxer AVOptions:
-min_delay         <int>        .D.... minimum valid delay between frames (in hundredths of second) (from 0 to 6000)
-default_delay     <int>        .D.... default delay between frames (in hundredths of second) (from 0 to 6000)

