diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index aa727979ba..4d684dad50 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -22,7 +22,7 @@
 #define AVFORMAT_AVFORMAT_H
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 54
+#define LIBAVFORMAT_VERSION_MINOR 55
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
diff --git a/libavformat/utils.c b/libavformat/utils.c
index d431d42bdd..325d7c0b65 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2116,6 +2116,11 @@ int av_find_stream_info(AVFormatContext *ic)
 
     for(i=0;i<ic->nb_streams;i++) {
         st = ic->streams[i];
+        if (st->codec->codec_id == CODEC_ID_AAC) {
+            st->codec->sample_rate = 0;
+            st->codec->frame_size = 0;
+            st->codec->channels = 0;
+        }
         if(st->codec->codec_type == CODEC_TYPE_VIDEO){
 /*            if(!st->time_base.num)
                 st->time_base= */