From 8c611ea1e2452eed8c57cc57511deadc76962a71 Mon Sep 17 00:00:00 2001
From: nareix <hi.nareix@gmail.com>
Date: Fri, 10 Jun 2016 19:46:00 +0800
Subject: [PATCH] change error message

---
 muxer.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/muxer.go b/muxer.go
index c6ab707..57a04e2 100644
--- a/muxer.go
+++ b/muxer.go
@@ -145,7 +145,7 @@ func (self *Stream) fillTrackAtom() (err error) {
 		self.trackAtom.Media.Info.Sound = &atom.SoundMediaInfo{}
 
 	} else {
-		err = fmt.Errorf("please specify stream type")
+		err = fmt.Errorf("mp4: codec type=%d invalid", self.Type())
 	}
 
 	return