API changes, most recent first:
+2009-12-05 - r20734 - lavfi 1.12.0 - avfilter_draw_slice()
+ Add a slice_dir parameter to avfilter_draw_slice().
+
2009-11-26 - r20611 - lavfi 1.11.0 - AVFilter
Remove the next field from AVFilter, this is not anymore required.