doc/swscaler: explain default Lanczos parameter

Explain that the default Lanczos filter parameter is 3 and that it can be changed by the param0 option. Signed-off-by: Werner Robitza <werner.robitza@gmail.com>
6 years ago · 7458fa119c
parent 254da41531
commit 7458fa119c
1 changed files with 2 additions and 1 deletions
--- a/doc/scaler.texi
+++ b/doc/scaler.texi
@ -48,7 +48,8 @@ Select Gaussian rescaling algorithm.
 Select sinc rescaling algorithm.

@item lanczos
-Select Lanczos rescaling algorithm.
+Select Lanczos rescaling algorithm. The default width (alpha) is 3 and can be
+changed by setting @code{param0}.

@item spline
 Select natural bicubic spline rescaling algorithm.