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@@ -2101,6 +2101,13 @@ Value of pixel component at current location for first video frame (top layer).
@item BOTTOM, B
Value of pixel component at current location for second video frame (bottom layer).
@end table
+
+@item shortest
+Force termination when the shortest input terminates. Default is @code{0}.
+@item repeatlast
+Continue applying the last bottom frame after the end of the stream. A value of
+@code{0} disable the filter after the last frame of the bottom layer is reached.
+Default is @code{1}.
@end table
@subsection Examples