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-rw-r--r--doc/filters.texi5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index c4b132d6c7..0039044a28 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -183,6 +183,11 @@ threshold, and defaults to 98.
@var{threshold} is the threshold below which a pixel value is
considered black, and defaults to 32.
+@section copy
+
+Copy the input source unchanged to the output. Mainly useful for
+testing purposes.
+
@section crop
Crop the input video to @var{out_w}:@var{out_h}:@var{x}:@var{y}.