From 244e751146be63d2812e07ea80e6c793054055ce Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Sun, 12 Dec 2010 09:40:16 +0000
Subject: [PATCH] From David Fries, "The ffmpeg lockmanager was introduced in
 ffmpeg 52 30 1, but later backported to 52 20 1, so add that to the version
 check in ReaderWriterFFmpeg.cpp."

---
 src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp b/src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp
index f1a329a70..173d30915 100644
--- a/src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp
+++ b/src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp
@@ -19,7 +19,10 @@
 #include <osgDB/FileNameUtils>
 #include <osgDB/FileUtils>
 
-#if LIBAVCODEC_VERSION_MAJOR >= 53 || (LIBAVCODEC_VERSION_MAJOR==52 && LIBAVCODEC_VERSION_MINOR>=30)
+
+#if LIBAVCODEC_VERSION_MAJOR >= 53 || \
+    (LIBAVCODEC_VERSION_MAJOR==52 && LIBAVCODEC_VERSION_MINOR>=30) || \
+    (LIBAVCODEC_VERSION_MAJOR==52 && LIBAVCODEC_VERSION_MINOR==20 && LIBAVCODEC_VERSION_MICRO >= 1)
     #define USE_AV_LOCK_MANAGER
 #endif