1 files changed, 19 insertions, 15 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 1d3457ca9c..022c98468f 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1834,18 +1834,20 @@ the video frame. Also the display aspect ratio set by this filter may
 be changed by later filters in the filterchain, e.g. in case of
 scaling or if another "setdar" or a "setsar" filter is applied.
 
-The filter accepts a parameter string which represents the wanted
-display aspect ratio.
-The parameter can be a floating point number string, or an expression
-of the form @var{num}:@var{den}, where @var{num} and @var{den} are the
-numerator and denominator of the aspect ratio.
-If the parameter is not specified, it is assumed the value "0:1".
+This filter accepts the following options:
+
+@table @option
+
+@item dar
+Output display aspect ratio, as a rational or a decimal number.
+
+@end table
 
 For example to change the display aspect ratio to 16:9, specify:
 @example
-setdar=16:9
+setdar=dar=16/9
 # the above is equivalent to
-setdar=1.77777
+setdar=dar=1.77777
 @end example
 
 See also the @ref{setsar} filter documentation.
@@ -1929,16 +1931,18 @@ Keep in mind that the sample aspect ratio set by this filter may be
 changed by later filters in the filterchain, e.g. if another "setsar"
 or a "setdar" filter is applied.
 
-The filter accepts a parameter string which represents the wanted
-sample aspect ratio.
-The parameter can be a floating point number string, or an expression
-of the form @var{num}:@var{den}, where @var{num} and @var{den} are the
-numerator and denominator of the aspect ratio.
-If the parameter is not specified, it is assumed the value "0:1".
+This filter accepts the following options:
+
+@table @option
+
+@item sar
+Output sample aspect ratio, as a rational or decimal number.
+
+@end table
 
 For example to change the sample aspect ratio to 10:11, specify:
 @example
-setsar=10:11
+setsar=sar=10/11
 @end example
 
 @section settb