doc/filters/drawtext: simplify example, use clip() eval function

diff --git a/doc/filters.texi b/doc/filters.texi
index 54d6549454e210b429a56c31419a4db69fc99804..8cde2775a6a37b820d3540cfc65b37d7c8af7e5e 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4032,7 +4032,7 @@ DS=1.0 # display start
 DE=10.0 # display end
 FID=1.5 # fade in duration
 FOD=5 # fade out duration
 DE=10.0 # display end
 FID=1.5 # fade in duration
 FOD=5 # fade out duration

-ffplay -f lavfi "color,drawtext=text=TEST:fontsize=50:fontfile=FreeSerif.ttf:fontcolor_expr=ff0000%@{eif\\\\: max(0\\, min(255\\, 255*(1*between(t\\, $DS + $FID\\, $DE - $FOD) + ((t - $DS)/$FID)*between(t\\, $DS\\, $DS + $FID) + (-(t - $DE)/$FOD)*between(t\\, $DE - $FOD\\, $DE) ) )) \\\\: x\\\\: 2 @}"
+ffplay -f lavfi "color,drawtext=text=TEST:fontsize=50:fontfile=FreeSerif.ttf:fontcolor_expr=ff0000%@{eif\\\\: clip(255*(1*between(t\\, $DS + $FID\\, $DE - $FOD) + ((t - $DS)/$FID)*between(t\\, $DS\\, $DS + $FID) + (-(t - $DE)/$FOD)*between(t\\, $DE - $FOD\\, $DE) )\\, 0\\, 255) \\\\: x\\\\: 2 @}"

 @end example
 
 @end itemize
 @end example
 
 @end itemize