diff --git a/avutil/avutil.go b/avutil/avutil.go
index 5c774fa..499d6b4 100644
--- a/avutil/avutil.go
+++ b/avutil/avutil.go
@@ -133,6 +133,7 @@ func (self *Handlers) OpenDemuxer(uri string) (demuxer av.DemuxCloser, err error
 		}
 	}
 
+	r.Close()
 	err = fmt.Errorf("avutil: open %s failed", uri)
 	return
 }