[FFmpeg-devel] [PATCH] doc/filters: simplify lenscorrection option descriptions

[Lou Logan]

Also mention option defaults.
Also fix incorrect k1 and k2 "no correction" values.

Signed-off-by: Lou Logan <lou at lrcd.com>
---
 doc/filters.texi | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index c6fef0c..c74b4b5 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -5961,17 +5961,15 @@ The filter accepts the following options:
 
 @table @option
 @item cx
-Relative x-coordinate of the focal point of the image, and thereby the center of the
-distortion. This value has a range [0,1] and is expressed as fractions of the image
-width.
+Set the x-center of the distortion. Range is 0 to 1. Default is 0.5.
 @item cy
-Relative y-coordinate of the focal point of the image, and thereby the center of the
-distortion. This value has a range [0,1] and is expressed as fractions of the image
-height.
+Set the y-center of the distortion. Range is 0 to 1. Default is 0.5.
 @item k1
-Coefficient of the quadratic correction term. 0.5 means no correction.
+Coefficient of the quadratic correction term. 0.0 means no correction.
+Range is -1 to 1. Default is 0.0.
 @item k2
-Coefficient of the double quadratic correction term. 0.5 means no correction.
+Coefficient of the double quadratic correction term. 0.0 means no correction.
+Range is -1 to 1. Default is 0.0.
 @end table
 
 The formula that generates the correction is:
-- 
2.2.2