lavfi/transpose: add passthrough option

1 files changed, 17 insertions, 2 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index e5774a1c1b..69a8ee1a0f 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3559,8 +3559,23 @@ l.r     l.L
 @end example
 @end table
 
-For values between 4-7 transposition is only done if the input video
-geometry is portrait and not landscape.
+For values between 4-7, the transposition is only done if the input
+video geometry is portrait and not landscape. These values are
+deprecated, the @code{passthrough} option should be used instead.
+
+@item passthrough
+Do not apply the transposition if the input geometry matches the one
+specified by the specified value. It accepts the following values:
+@table @samp
+@item none
+Always apply transposition.
+@item portrait
+Preserve portrait geometry (when @var{height} >= @var{width}).
+@item landscape
+Preserve landscape geometry (when @var{width} >= @var{height}).
+@end table
+
+Default value is @code{none}.
 @end table
 
 @section unsharp