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package main
import (
"log"
"net"
"github.com/bluenviron/gortsplib/v4"
"github.com/bluenviron/gortsplib/v4/pkg/description"
"github.com/bluenviron/gortsplib/v4/pkg/format"
"github.com/bluenviron/mediacommon/pkg/codecs/mpeg4audio"
"github.com/pion/rtp"
)
// This example shows how to
// 1. generate RTP/MPEG-4 audio packets with GStreamer
// 2. connect to a RTSP server, announce an MPEG-4 audio format
// 3. route the packets from GStreamer to the server
func main() {
// open a listener to receive RTP/MPEG-4 audio packets
pc, err := net.ListenPacket("udp", "localhost:9000")
if err != nil {
panic(err)
}
defer pc.Close()
log.Println("Waiting for a RTP/MPEG-4 audio stream on UDP port 9000 - you can send one with GStreamer:\n" +
"gst-launch-1.0 audiotestsrc freq=300 ! audioconvert ! audioresample ! audio/x-raw,rate=48000" +
" ! avenc_aac bitrate=128000 ! rtpmp4gpay ! 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 description that contains a MPEG-4 audio format
desc := &description.Session{
Medias: []*description.Media{{
Type: description.MediaTypeVideo,
Formats: []format.Format{&format.MPEG4Audio{
PayloadTyp: 96,
Config: &mpeg4audio.Config{
Type: mpeg4audio.ObjectTypeAACLC,
SampleRate: 48000,
ChannelCount: 2,
},
SizeLength: 13,
IndexLength: 3,
IndexDeltaLength: 3,
}},
}},
}
// connect to the server and start recording
c := gortsplib.Client{}
err = c.StartRecording("rtsp://localhost:8554/mystream", desc)
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(desc.Medias[0], &pkt)
if err != nil {
panic(err)
}
// read another RTP packet from source
n, _, err = pc.ReadFrom(buf)
if err != nil {
panic(err)
}
}
}
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