main.go

package main

import (
	"log"
	"net"
	"time"

	"github.com/bluenviron/gortsplib/v3"
	"github.com/bluenviron/gortsplib/v3/pkg/formats"
	"github.com/bluenviron/gortsplib/v3/pkg/media"
	"github.com/pion/rtp"
)

// This example shows how to
// 1. set additional client options
// 2. generate RTP/H264 frames from a file with GStreamer
// 3. connect to a RTSP server, announce an H264 media
// 4. write the frames to the server

func main() {
	// open a listener to receive RTP/H264 frames
	pc, err := net.ListenPacket("udp", "localhost:9000")
	if err != nil {
		panic(err)
	}
	defer pc.Close()

	log.Println("Waiting for a RTP/H264 stream on port 9000 - you can send one with GStreamer:\n" +
		"gst-launch-1.0 filesrc location=video.mp4 ! qtdemux ! video/x-h264" +
		" ! h264parse config-interval=1 ! rtph264pay ! udpsink host=127.0.0.1 port=9000")

	// wait for first packet
	buf := make([]byte, 2048)
	n, _, err := pc.ReadFrom(buf)
	if err != nil {
		panic(err)
	}
	log.Println("stream connected")

	// create a media that contains a H264 media
	medi := &media.Media{
		Type: media.TypeVideo,
		Formats: []formats.Format{&formats.H264{
			PayloadTyp:        96,
			PacketizationMode: 1,
		}},
	}

	// Client allows to set additional client options
	c := &gortsplib.Client{
		// transport protocol (UDP or TCP). If nil, it is chosen automatically
		Transport: nil,
		// timeout of read operations
		ReadTimeout: 10 * time.Second,
		// timeout of write operations
		WriteTimeout: 10 * time.Second,
	}

	// connect to the server and start recording the media
	err = c.StartRecording("rtsp://localhost:8554/mystream", media.Medias{medi})
	if err != nil {
		panic(err)
	}
	defer c.Close()

	var pkt rtp.Packet
	for {
		// parse RTP packet
		err = pkt.Unmarshal(buf[:n])
		if err != nil {
			panic(err)
		}

		// route RTP packet to the server
		err = c.WritePacketRTP(medi, &pkt)
		if err != nil {
			panic(err)
		}

		// read another RTP packet from source
		n, _, err = pc.ReadFrom(buf)
		if err != nil {
			panic(err)
		}
	}
}