From ebaf20e94b99edfa2d1fb70e68ae6eba90773a47 Mon Sep 17 00:00:00 2001
From: Nicolas George <nicolas.george@normalesup.org>
Date: Thu, 18 Jul 2013 11:03:56 +0200
Subject: [PATCH] lavfi/scale: allocate interlaced scalers only if needed.

Fix "Value 0.000000 for parameter 'srch' out of range"
error message when source or destination height is 1.

Note: since the av_opt_set_int() calls are not checked for
failure and the interlaced scalers are not actually used,
this error has no consequence apart from a frightening message
in the log.
---
 libavfilter/vf_scale.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c
index a71340a2bf..c91bbaa7dd 100644
--- a/libavfilter/vf_scale.c
+++ b/libavfilter/vf_scale.c
@@ -287,6 +287,8 @@ static int config_props(AVFilterLink *outlink)
 
             if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
                 return ret;
+            if (!scale->interlaced)
+                break;
         }
     }