diff --git a/src/AVDecoder.cpp b/src/AVDecoder.cpp
index fc496138..64eebf5c 100644
--- a/src/AVDecoder.cpp
+++ b/src/AVDecoder.cpp
@@ -26,6 +26,15 @@
 namespace QtAV {
 AVDecoder::AVDecoder()
 {
+    class AVInitializer {
+    public:
+        AVInitializer() {
+            qDebug("avcodec_register_all");
+            avcodec_register_all();
+        }
+    };
+    static AVInitializer sAVInit;
+    Q_UNUSED(sAVInit);
 }
 
 AVDecoder::AVDecoder(AVDecoderPrivate &d)