diff --git a/publisher.go b/publisher.go
index 8b95973..8357cb8 100644
--- a/publisher.go
+++ b/publisher.go
@@ -63,8 +63,12 @@ func (p *RTSPPublisher) SetTracks() error {
 				}
 				p.Tracks[trackId] = vt
 				t := track.(*gortsplib.TrackH264)
-				vt.WriteSlice(common.NALUSlice{t.SPS})
-				vt.WriteSlice(common.NALUSlice{t.PPS})
+				if len(t.SPS) > 0 {
+					vt.WriteSlice(common.NALUSlice{t.SPS})
+				}
+				if len(t.PPS) > 0 {
+					vt.WriteSlice(common.NALUSlice{t.PPS})
+				}
 			case "h265", "hevc":
 				vt := NewH265(p.Stream)
 				if payloadType, err := strconv.Atoi(vals[0]); err == nil {