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-rw-r--r--DOCS/man/vo.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/DOCS/man/vo.rst b/DOCS/man/vo.rst
index 3f2667668d..6190526bd7 100644
--- a/DOCS/man/vo.rst
+++ b/DOCS/man/vo.rst
@@ -303,6 +303,9 @@ Available video output drivers are:
which is good for some content types. The number of taps can be
controlled with ``scale-radius``, but is best left unchanged.
+ If the radius is not changed, this filter corresponds to the old
+ ``lanczos3`` alias, while ``lanczos2`` corresponds to a radius of 2.
+
``ewa_lanczos``
Elliptic weighted average Lanczos scaling. Also known as Jinc.
Relatively slow, but very good quality. The number of taps can