change track initialization method

examples/client-publish-aac/main.go

@@ -34,9 +34,14 @@ func main() {
 	log.Println("stream connected")
 
 	// create an AAC track
-	track, err := gortsplib.NewTrackAAC(96, 2, 48000, 2, nil, 13, 3, 3)
-	if err != nil {
-		panic(err)
+	track := &gortsplib.TrackAAC{
+		PayloadType:      96,
+		Type:             2,
+		SampleRate:       48000,
+		ChannelCount:     2,
+		SizeLength:       13,
+		IndexLength:      3,
+		IndexDeltaLength: 3,
 	}
 
 	// connect to the server and start publishing the track

examples/client-publish-h264/main.go

@@ -35,9 +35,8 @@ func main() {
 	log.Println("stream connected")
 
 	// create an H264 track
-	track, err := gortsplib.NewTrackH264(96, nil, nil, nil)
-	if err != nil {
-		panic(err)
+	track := &gortsplib.TrackH264{
+		PayloadType: 96,
 	}
 
 	// connect to the server and start publishing the track

examples/client-publish-options/main.go

@@ -36,9 +36,8 @@ func main() {
 	log.Println("stream connected")
 
 	// create an H264 track
-	track, err := gortsplib.NewTrackH264(96, nil, nil, nil)
-	if err != nil {
-		panic(err)
+	track := &gortsplib.TrackH264{
+		PayloadType: 96,
 	}
 
 	// Client allows to set additional client options

examples/client-publish-opus/main.go

@@ -34,7 +34,11 @@ func main() {
 	log.Println("stream connected")
 
 	// create an Opus track
-	track := gortsplib.NewTrackOpus(96, 48000, 2)
+	track := &gortsplib.TrackOpus{
+		PayloadType:  96,
+		SampleRate:   48000,
+		ChannelCount: 2,
+	}
 
 	c := gortsplib.Client{}
 

examples/client-publish-pause/main.go

@@ -37,9 +37,8 @@ func main() {
 	log.Println("stream connected")
 
 	// create an H264 track
-	track, err := gortsplib.NewTrackH264(96, nil, nil, nil)
-	if err != nil {
-		panic(err)
+	track := &gortsplib.TrackH264{
+		PayloadType: 96,
 	}
 
 	// connect to the server and start publishing the track

examples/client-publish-pcmu/main.go

@@ -34,7 +34,7 @@ func main() {
 	log.Println("stream connected")
 
 	// create a PCMU track
-	track := gortsplib.NewTrackPCMU()
+	track := &gortsplib.TrackPCMU{}
 
 	c := gortsplib.Client{}
 

examples/client-read-aac/main.go

@@ -50,10 +50,10 @@ func main() {
 
 	// setup decoder
 	dec := &rtpaac.Decoder{
-		SampleRate:       aacTrack.ClockRate(),
-		SizeLength:       aacTrack.SizeLength(),
-		IndexLength:      aacTrack.IndexLength(),
-		IndexDeltaLength: aacTrack.IndexDeltaLength(),
+		SampleRate:       aacTrack.SampleRate,
+		SizeLength:       aacTrack.SizeLength,
+		IndexLength:      aacTrack.IndexLength,
+		IndexDeltaLength: aacTrack.IndexDeltaLength,
 	}
 	dec.Init()
 

examples/client-read-h264-convert-to-jpeg/main.go

@@ -81,11 +81,13 @@ func main() {
 	defer h264dec.close()
 
 	// if present, send SPS and PPS from the SDP to the decoder
-	if h264track.SPS() != nil {
-		h264dec.decode(h264track.SPS())
+	sps := h264track.SafeSPS()
+	if sps != nil {
+		h264dec.decode(sps)
 	}
-	if h264track.PPS() != nil {
-		h264dec.decode(h264track.PPS())
+	pps := h264track.SafePPS()
+	if pps != nil {
+		h264dec.decode(pps)
 	}
 
 	// called when a RTP packet arrives

examples/client-read-h264-save-to-disk/main.go

@@ -46,7 +46,7 @@ func main() {
 	}
 
 	// setup H264->MPEGTS encoder
-	enc, err := newMPEGTSEncoder(h264track.SPS(), h264track.PPS())
+	enc, err := newMPEGTSEncoder(h264track.SafeSPS(), h264track.SafePPS())
 	if err != nil {
 		panic(err)
 	}

examples/client-read-h264/main.go

@@ -58,11 +58,13 @@ func main() {
 	defer h264dec.close()
 
 	// if present, send SPS and PPS from the SDP to the decoder
-	if h264track.SPS() != nil {
-		h264dec.decode(h264track.SPS())
+	sps := h264track.SafeSPS()
+	if sps != nil {
+		h264dec.decode(sps)
 	}
-	if h264track.PPS() != nil {
-		h264dec.decode(h264track.PPS())
+	pps := h264track.SafePPS()
+	if pps != nil {
+		h264dec.decode(pps)
 	}
 
 	// called when a RTP packet arrives