diff --git a/pkg/h264/avc.go b/pkg/h264/avc.go
index fcad70d8..e4844d8b 100644
--- a/pkg/h264/avc.go
+++ b/pkg/h264/avc.go
@@ -60,3 +60,18 @@ func SplitAVC(data []byte) [][]byte {
 	}
 	return nals
 }
+
+func Types(data []byte) []byte {
+	var types []byte
+	for {
+		types = append(types, NALUType(data))
+
+		size := 4 + int(binary.BigEndian.Uint32(data))
+		if size < len(data) {
+			data = data[size:]
+		} else {
+			break
+		}
+	}
+	return types
+}
diff --git a/pkg/h264/rtp.go b/pkg/h264/rtp.go
index f8eef2dd..e1384333 100644
--- a/pkg/h264/rtp.go
+++ b/pkg/h264/rtp.go
@@ -42,6 +42,8 @@ func RTPDepay(track *streamer.Track) streamer.WrapperFunc {
 				buffer = nil
 			}
 
+			//fmt.Printf("[AVC] %v, len: %d\n", Types(payload), len(payload))
+
 			switch NALUType(payload) {
 			case NALUTypeIFrame:
 				payload = Join(ps, payload)