+extern int mlt_property_interpolate( mlt_property self, mlt_property points[], double progress, double fps, locale_t locale, mlt_keyframe_type interp );
+extern double mlt_property_anim_get_double( mlt_property self, double fps, locale_t locale, int position, int length );
+extern int mlt_property_anim_get_int( mlt_property self, double fps, locale_t locale, int position, int length );
+extern char* mlt_property_anim_get_string( mlt_property self, double fps, locale_t locale, int position, int length );
+extern int mlt_property_anim_set_double( mlt_property self, double value, double fps, locale_t locale, int position, int length, mlt_keyframe_type keyframe_type );
+extern int mlt_property_anim_set_int( mlt_property self, int value, double fps, locale_t locale, int position, int length, mlt_keyframe_type keyframe_type );
+extern int mlt_property_anim_set_string( mlt_property self, const char *value, double fps, locale_t locale, int position, int length );
+extern mlt_animation mlt_property_get_animation( mlt_property self );