Add support AAC for RTMP to MP4

cmd/mp4/mp4.go

@@ -84,9 +84,8 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 
 	cons := &mp4.Consumer{}
 	cons.Listen(func(msg interface{}) {
-		switch msg := msg.(type) {
-		case []byte:
-			if _, err := w.Write(msg); err != nil {
+		if data, ok := msg.([]byte); ok {
+			if _, err := w.Write(data); err != nil {
 				exit <- struct{}{}
 			}
 		}
@@ -112,6 +111,8 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	cons.Start()
+
 	<-exit
 
 	log.Trace().Msg("[api.mp4] close")