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-rw-r--r--DOCS/tech/vop.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/DOCS/tech/vop.txt b/DOCS/tech/vop.txt
index 0b898c274b..fbb03a3969 100644
--- a/DOCS/tech/vop.txt
+++ b/DOCS/tech/vop.txt
@@ -209,3 +209,7 @@ Current plugins:
radius blur filter strength (~0.1-5.0) (slower if larger)
strength (0.0-1.0) -> blur, (-1.0-0.0) -> sharpen
threshold 0 -> filter all, (0-30) -> filter flat areas, (-30-0) -> filter edges
+
+-vop perspective=x0:y0:x1:y1:x2:y2:x3:y3:t
+ x0,y0,... coordinates of the topleft, topright, bottomleft, bottomright corners
+ t 0-> linear, 1->cubic resampling