From 3ff9995350b7914c056bbc8440f44bf725dbb1d3 Mon Sep 17 00:00:00 2001
From: Baptiste Coudurier <baptiste.coudurier@gmail.com>
Date: Wed, 24 Nov 2010 01:32:49 +0000
Subject: [PATCH] In crop filter, reference picref after updating w/h, fix
 issue #2377

Originally committed as revision 25818 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavfilter/vf_crop.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_crop.c b/libavfilter/vf_crop.c
index 61019ef80e..88356c6da3 100644
--- a/libavfilter/vf_crop.c
+++ b/libavfilter/vf_crop.c
@@ -237,12 +237,14 @@ static void start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
 {
     AVFilterContext *ctx = link->dst;
     CropContext *crop = ctx->priv;
-    AVFilterBufferRef *ref2 = avfilter_ref_buffer(picref, ~0);
+    AVFilterBufferRef *ref2;
     int i;
 
     picref->video->w = crop->w;
     picref->video->h = crop->h;
 
+    ref2 = avfilter_ref_buffer(picref, ~0);
+
     crop->var_values[VAR_T] = picref->pts == AV_NOPTS_VALUE ?
         NAN : picref->pts * av_q2d(link->time_base);
     crop->var_values[VAR_POS] = picref->pos == -1 ? NAN : picref->pos;