From 33b97faaba2744f0a2fd65c0ef9ecc2de3fad7ff Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 25 Feb 2013 21:21:29 +0100
Subject: vf_setpts: switch to an AVOptions-based system.

---
 doc/filters.texi | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

(limited to 'doc/filters.texi')

diff --git a/doc/filters.texi b/doc/filters.texi
index 037d6ad492..0c7527fd11 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1895,8 +1895,17 @@ See also the @ref{setsar} filter documentation.
 
 Change the PTS (presentation timestamp) of the input video frames.
 
-Accept in input an expression evaluated through the eval API, which
-can contain the following constants:
+This filter accepts the following options:
+
+@table @option
+
+@item expr
+The expression which is evaluated for each frame to construct its timestamp.
+
+@end table
+
+The expression is evaluated through the eval API and can contain the following
+constants:
 
 @table @option
 @item PTS
@@ -1938,10 +1947,10 @@ Some examples follow:
 
 @example
 # start counting PTS from zero
-setpts=PTS-STARTPTS
+setpts=expr=PTS-STARTPTS
 
 # fast motion
-setpts=0.5*PTS
+setpts=expr=0.5*PTS
 
 # slow motion
 setpts=2.0*PTS
-- 
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