为什么 Pion/WebRTC 生成的候选列表中没有 TCP 地址？

huangapple
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英文:

why there pion/webrtc generate candidate list have no tcp address

问题

我想使用golang的pion/webrtc库将本地视频文件发布到一个视频服务器，但是这个视频服务器只支持TCP连接。当我使用pion/webrtc代码生成offer SDP并且候选者列表中没有TCP候选者时，ICE连接失败。

当我使用Chrome作为webrtc客户端发布摄像头视频时，它是成功的，我不知道如何让Chrome禁用TCP候选者，我检查了来自Chrome和pion/webrtc的候选者，我发现它们之间的区别在于TCP地址，我尝试了所有方法让pion/webrtc生成一个TCP候选者地址，但都失败了，请帮助我。

这是我的代码：

package main

import (
	"fmt"
	"io"
	"os"
	"path/filepath"
	"sync"
	"time"

	"github.com/google/uuid"
	"github.com/pion/webrtc/v3"
	"github.com/pion/webrtc/v3/pkg/media"
	"github.com/pion/webrtc/v3/pkg/media/h264reader"
)

func main() {

	// 创建PeerConnection配置
	config := webrtc.Configuration{
		ICEServers: []webrtc.ICEServer{
			{
				URLs: []string{"stun:stun.l.google.com:19302"},
			},
		},
		ICETransportPolicy: webrtc.ICETransportPolicyAll,
	}

	// 创建PeerConnection
	peerConnection, err := webrtc.NewPeerConnection(config)
	if err != nil {
		panic(err)
	}

	videoTrack, err := NewH264LocalStaticSampleVideoTrack("test.h264", 25)
	if err != nil {
		panic(err)
	}

	if rtpSender, err := peerConnection.AddTrack(videoTrack); err != nil {
		panic(err)
	} else {
		go func() {
			for {

				buf := make([]byte, 1024*1024)
				var rtcpErr error
				if _, _, rtcpErr = rtpSender.Read(buf); rtcpErr != nil {
					fmt.Printf("read error: %v", rtcpErr.Error())
					return
				}
			}
		}()
	}

	offer, err := peerConnection.CreateOffer(nil)
	if err != nil {
		panic(err)
	}
	err = peerConnection.SetLocalDescription(offer)
	if err != nil {
		panic(err)
	}

	wait := webrtc.GatheringCompletePromise(peerConnection)
	<-wait

	fmt.Printf("Local SDP: %v", peerConnection.LocalDescription().SDP)
}

func NewH264LocalStaticSampleVideoTrack(videoFile string, fps int) (videoTrack *webrtc.TrackLocalStaticSample, err error) {
	if videoFile == "" {
		err = fmt.Errorf("videoFile is empty")
		return
	}

	var videoFileAbs string
	videoFileAbs, err = filepath.Abs(videoFile)
	if err != nil {
		return
	}

	_, err = os.Stat(videoFileAbs)
	if err != nil {
		return
	}

	videoTrack, err = webrtc.NewTrackLocalStaticSample(webrtc.RTPCodecCapability{
		MimeType: webrtc.MimeTypeH264,
	}, "video", fmt.Sprintf("rtckit/%s", uuid.New().String()))
	if err != nil {
		return
	}

	go h264VideoFileConsumer(videoTrack, videoFileAbs, time.Duration(1000/fps)*time.Millisecond)

	return
}

func h264VideoFileConsumer(videoTrack *webrtc.TrackLocalStaticSample, videoFile string, videoFps time.Duration) {
	for {
		file, h264Err := os.Open(videoFile)
		if h264Err != nil {

			continue
		}

		h264, h264Err := h264reader.NewReader(file)
		if h264Err != nil {

			continue
		}

		buf := make(chan []byte, 1024*1024) // 1MB?

		var wg sync.WaitGroup

		wg.Add(2)
		go func() {
			defer wg.Done()
			for data := range buf {
				sample := media.Sample{Data: data, Duration: videoFps}

				if h264Err1 := videoTrack.WriteSample(sample); h264Err1 != nil {

					continue
				}
			}
		}()

		go func() {
			defer wg.Done()
			ticker := time.NewTicker(videoFps)
			for ; true; <-ticker.C {
				nal, h264Err := h264.NextNAL()
				if h264Err == io.EOF {

					break
				}
				if h264Err != nil {

					break
				}

				buf <- nal.Data
			}

			close(buf)
		}()

		wg.Wait()
		_ = file.Close()
	}
}

这是我得到的offer：

offer2: v=0
o=- 3976125905671053001 1681720949 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 31:A1:C7:4B:05:14:A3:7E:FE:CA:9C:4D:91:F0:29:6C:01:BF:20:67:DF:AA:EA:06:29:A4:DD:3F:F0:AA:5B:BD
a=extmap-allow-mixed
a=group:BUNDLE 0
m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102 121 127 120 125 107 108 109 123 118 116
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:0
a=ice-ufrag:ZjDGAGZtPHgWMfWa
a=ice-pwd:bJJRYUMfPcshoPCHTSfkyfrzwiJIiQkm
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:96 VP8/90000
a=rtcp-fb:96 goog-remb 
a=rtcp-fb:96 ccm fir
a=rtcp-fb:96 nack 
a=rtcp-fb:96 nack pli
a=rtcp-fb:96 nack 
a=rtcp-fb:96 nack pli
a=rtcp-fb:96 transport-cc 
a=rtpmap:97 rtx/90000
a=fmtp:97 apt=96
a=rtcp-fb:97 nack 
a=rtcp-fb:97 nack pli
a=rtcp-fb:97 transport-cc 
a=rtpmap:98 VP9/90000
a=fmtp:98 profile-id=0
a=rtcp-fb:98 goog-remb 
a=rtcp-fb:98 ccm fir
a=rtcp-fb:98 nack 
a=rtcp-fb:98 nack pli
a=rtcp-fb:98 nack 
a=rtcp-fb:98 nack pli
a=rtcp-fb:98 transport-cc 
a=rtpmap:99 rtx/90000
a=fmtp:99 apt=98
a=rtcp-fb:99 nack 
a=rtcp-fb:99 nack pli
a=rtcp-fb:99 transport-cc 
a=rtpmap:100 VP9/90000
a=fmtp:100 profile-id=1
a=rtcp-fb:100 goog-remb 
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack 
a=rtcp-fb:100 nack pli
a=rtcp-fb:100 nack 
a=rtcp-fb:100 nack pli
a=rtcp-fb:100 transport-cc 
a=rtpmap:101 rtx/90000
a=fmtp:101 apt=100
a=rtcp-fb:101 nack 
a=rtcp-fb:101 nack pli
a=rtcp-fb:101 transport-cc 
a=rtpmap:102 H264/90000
a=fmtp:102 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f
a=rtcp-fb:102 goog-remb 
a=rtcp-fb:102 ccm fir
a=rtcp-fb:102 nack 
a=rtcp-fb:102 nack pli
a=rtcp-fb:102 nack 
a=rtcp-fb:102 nack pli
a=rtcp-fb:102 transport-cc 
a=rtpmap:121 rtx/90000
a=fmtp:121 apt=102
a=rtcp-fb:121 nack 
a=rtcp-fb:121 nack pli
a=rtcp-fb:121 transport-cc 
a=rtpmap:127 H264/90000
a=fmtp:127 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42001f
a=rtcp-fb:127 goog-remb 
a=rtcp-fb:127 ccm fir
a=rtcp-fb:127 nack 
a=rtcp-fb:127 nack pli
a=rtcp-fb:127 nack 
a=rtcp-fb:127 nack pli
a=rtcp-fb:127 transport-cc 
a=rtpmap:120 rtx/90000
a=fmtp:120 apt=127
a=rtcp-fb:120 nack 
a=rtcp-fb:120 nack pli
a=rtcp-fb:120 transport-cc 
a=rtpmap:125 H264/90000
a=fmtp:125 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
a=rtcp-fb:125 goog-remb 
a=rtcp-fb:125 ccm fir
a=rtcp-fb:125 nack 
a=rtcp-fb:125 nack pli
a=rtcp-fb:125 nack 
a=rtcp-fb:125 nack pli
a=rtcp-fb:125 transport-cc 
a=rtpmap:107 rtx/90000
a=fmtp:107 apt=125
a=rtcp-fb:107 nack 
a=rtcp-fb:107 nack pli
a=rtcp-fb:107 transport-cc 
a=rtpmap:108 H264/90000
a=fmtp:108 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
a=rtcp-fb:108 goog-remb 
a=rtcp-fb:108 ccm fir
a=rtcp-fb:108 nack 
a=rtcp-fb:108 nack pli
a=rtcp-fb:108 nack 
a=rtcp-fb:108 nack pli
a=rtcp-fb:108 transport-cc 
a=rtpmap:109 rtx/90000
a=fmtp:109 apt=108
a=rtcp-fb:109 nack 
a=rtcp-fb:109 nack pli
a=rtcp-fb:109 transport-cc 
a=rtpmap:123 H264/90000
a=fmtp:123 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640032
a=rtcp-fb:123 goog-remb 
a=rtcp-fb:123 ccm fir
a=rtcp-fb:123 nack 
a=rtcp-fb:123 nack pli
a=rtcp-fb:123 nack 
a=rtcp-fb:123 nack pli
a=rtcp-fb:123 transport-cc 
a=rtpmap:118 rtx/90000
a=fmtp:118 apt=123
a=rtcp-fb:118 nack 
a=rtcp-fb:118 nack pli
a=rtcp-fb:118 transport-cc 
a=rtpmap:116 ulpfec/90000
a=rtcp-fb:116 nack 
a=rtcp-fb:116 nack pli
a=rtcp-fb:116 transport-cc 
a=extmap:1 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=ssrc:554659860 cname:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031
a=ssrc:554659860 msid:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031 video
a=ssrc:554659860 mslabel:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031
a=ssrc:554659860 label:video
a=msid:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031 video
a=sendrecv
a=candidate:4113284106 1 udp 2130706431 101.4.122.16 41267 typ host
a=candidate:4113284106 2 udp 2130706431 101.4.122.16 41267 typ host
a=candidate:3528925834 1 udp 2130706431 172.18.0.1 33655 typ host
a=candidate:3528925834 2 udp 2130706431 172.18.0.1 33655 typ host
a=candidate:233762139 1 udp 2130706431 172.17.0.1 53508 typ host
a=candidate:233762139 2 udp 2130706431 172.17.0.1 53508 typ host
a=candidate:300762037 1 udp 1694498815 178.173.224.70 56107 typ srflx raddr 0.0.0.0 rport 56107
a=candidate:300762037 2 udp 1694498815 178.173.224.70 56107 typ srflx raddr 0.0.0.0 rport 56107
a=end-of-candidates

祝一切顺利~

英文:

I want use golang pion/webrtc to publish local video file to a video server, bug this video server only support TCP connection, when i generate offer SDP by pion/webrtc code and candidate list have no one TCP candidate, so ICE connect failed.
When I use chrome as a webrtc client to publish camera video, it's success, I don't how to make chrome disable TCP candidate, I checked candidcate from chrome and pion/webrtc, I found the difference is the candidate TCP address, I tried all way to let pion/webrtc generate an TCP candidate address, but all failed, please help me.

there is my code:

package main

import (
	&quot;fmt&quot;
	&quot;io&quot;
	&quot;os&quot;
	&quot;path/filepath&quot;
	&quot;sync&quot;
	&quot;time&quot;

	&quot;github.com/google/uuid&quot;
	&quot;github.com/pion/webrtc/v3&quot;
	&quot;github.com/pion/webrtc/v3/pkg/media&quot;
	&quot;github.com/pion/webrtc/v3/pkg/media/h264reader&quot;
)

func main() {

	// 创建PeerConnection配置
	config := webrtc.Configuration{
		ICEServers: []webrtc.ICEServer{
			{
				URLs: []string{&quot;stun:stun.l.google.com:19302&quot;},
			},
		},
		ICETransportPolicy: webrtc.ICETransportPolicyAll,
	}

	// 创建PeerConnection
	peerConnection, err := webrtc.NewPeerConnection(config)
	if err != nil {
		panic(err)
	}

	videoTrack, err := NewH264LocalStaticSampleVideoTrack(&quot;test.h264&quot;, 25)
	if err != nil {
		panic(err)
	}

	if rtpSender, err := peerConnection.AddTrack(videoTrack); err != nil {
		panic(err)
	} else {
		go func() {
			for {

				buf := make([]byte, 1024*1024)
				var rtcpErr error
				if _, _, rtcpErr = rtpSender.Read(buf); rtcpErr != nil {
					fmt.Printf(&quot;read error: %v&quot;, rtcpErr.Error())
					return
				}
			}
		}()
	}

	offer, err := peerConnection.CreateOffer(nil)
	if err != nil {
		panic(err)
	}
	err = peerConnection.SetLocalDescription(offer)
	if err != nil {
		panic(err)
	}

	wait := webrtc.GatheringCompletePromise(peerConnection)
	&lt;-wait

	fmt.Printf(&quot;Local SDP: %v&quot;, peerConnection.LocalDescription().SDP)
}

func NewH264LocalStaticSampleVideoTrack(videoFile string, fps int) (videoTrack *webrtc.TrackLocalStaticSample, err error) {
	if videoFile == &quot;&quot; {
		err = fmt.Errorf(&quot;videoFile is empty&quot;)
		return
	}

	var videoFileAbs string
	videoFileAbs, err = filepath.Abs(videoFile)
	if err != nil {
		return
	}

	_, err = os.Stat(videoFileAbs)
	if err != nil {
		return
	}

	videoTrack, err = webrtc.NewTrackLocalStaticSample(webrtc.RTPCodecCapability{
		MimeType: webrtc.MimeTypeH264,
	}, &quot;video&quot;, fmt.Sprintf(&quot;rtckit/%s&quot;, uuid.New().String()))
	if err != nil {
		return
	}

	go h264VideoFileConsumer(videoTrack, videoFileAbs, time.Duration(1000/fps)*time.Millisecond)

	return
}

func h264VideoFileConsumer(videoTrack *webrtc.TrackLocalStaticSample, videoFile string, videoFps time.Duration) {
	for {
		file, h264Err := os.Open(videoFile)
		if h264Err != nil {

			continue
		}

		h264, h264Err := h264reader.NewReader(file)
		if h264Err != nil {

			continue
		}

		buf := make(chan []byte, 1024*1024) // 1MB?

		var wg sync.WaitGroup

		wg.Add(2)
		go func() {
			defer wg.Done()
			for data := range buf {
				sample := media.Sample{Data: data, Duration: videoFps}

				if h264Err1 := videoTrack.WriteSample(sample); h264Err1 != nil {

					continue
				}
			}
		}()

		go func() {
			defer wg.Done()
			ticker := time.NewTicker(videoFps)
			for ; true; &lt;-ticker.C {
				nal, h264Err := h264.NextNAL()
				if h264Err == io.EOF {

					break
				}
				if h264Err != nil {

					break
				}

				buf &lt;- nal.Data
			}

			close(buf)
		}()

		wg.Wait()
		_ = file.Close()
	}
}

this the offer i get:

offer2: v=0
o=- 3976125905671053001 1681720949 IN IP4 0.0.0.0
s=-
t=0 0
a=fingerprint:sha-256 31:A1:C7:4B:05:14:A3:7E:FE:CA:9C:4D:91:F0:29:6C:01:BF:20:67:DF:AA:EA:06:29:A4:DD:3F:F0:AA:5B:BD
a=extmap-allow-mixed
a=group:BUNDLE 0
m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102 121 127 120 125 107 108 109 123 118 116
c=IN IP4 0.0.0.0
a=setup:actpass
a=mid:0
a=ice-ufrag:ZjDGAGZtPHgWMfWa
a=ice-pwd:bJJRYUMfPcshoPCHTSfkyfrzwiJIiQkm
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:96 VP8/90000
a=rtcp-fb:96 goog-remb 
a=rtcp-fb:96 ccm fir
a=rtcp-fb:96 nack 
a=rtcp-fb:96 nack pli
a=rtcp-fb:96 nack 
a=rtcp-fb:96 nack pli
a=rtcp-fb:96 transport-cc 
a=rtpmap:97 rtx/90000
a=fmtp:97 apt=96
a=rtcp-fb:97 nack 
a=rtcp-fb:97 nack pli
a=rtcp-fb:97 transport-cc 
a=rtpmap:98 VP9/90000
a=fmtp:98 profile-id=0
a=rtcp-fb:98 goog-remb 
a=rtcp-fb:98 ccm fir
a=rtcp-fb:98 nack 
a=rtcp-fb:98 nack pli
a=rtcp-fb:98 nack 
a=rtcp-fb:98 nack pli
a=rtcp-fb:98 transport-cc 
a=rtpmap:99 rtx/90000
a=fmtp:99 apt=98
a=rtcp-fb:99 nack 
a=rtcp-fb:99 nack pli
a=rtcp-fb:99 transport-cc 
a=rtpmap:100 VP9/90000
a=fmtp:100 profile-id=1
a=rtcp-fb:100 goog-remb 
a=rtcp-fb:100 ccm fir
a=rtcp-fb:100 nack 
a=rtcp-fb:100 nack pli
a=rtcp-fb:100 nack 
a=rtcp-fb:100 nack pli
a=rtcp-fb:100 transport-cc 
a=rtpmap:101 rtx/90000
a=fmtp:101 apt=100
a=rtcp-fb:101 nack 
a=rtcp-fb:101 nack pli
a=rtcp-fb:101 transport-cc 
a=rtpmap:102 H264/90000
a=fmtp:102 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f
a=rtcp-fb:102 goog-remb 
a=rtcp-fb:102 ccm fir
a=rtcp-fb:102 nack 
a=rtcp-fb:102 nack pli
a=rtcp-fb:102 nack 
a=rtcp-fb:102 nack pli
a=rtcp-fb:102 transport-cc 
a=rtpmap:121 rtx/90000
a=fmtp:121 apt=102
a=rtcp-fb:121 nack 
a=rtcp-fb:121 nack pli
a=rtcp-fb:121 transport-cc 
a=rtpmap:127 H264/90000
a=fmtp:127 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42001f
a=rtcp-fb:127 goog-remb 
a=rtcp-fb:127 ccm fir
a=rtcp-fb:127 nack 
a=rtcp-fb:127 nack pli
a=rtcp-fb:127 nack 
a=rtcp-fb:127 nack pli
a=rtcp-fb:127 transport-cc 
a=rtpmap:120 rtx/90000
a=fmtp:120 apt=127
a=rtcp-fb:120 nack 
a=rtcp-fb:120 nack pli
a=rtcp-fb:120 transport-cc 
a=rtpmap:125 H264/90000
a=fmtp:125 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
a=rtcp-fb:125 goog-remb 
a=rtcp-fb:125 ccm fir
a=rtcp-fb:125 nack 
a=rtcp-fb:125 nack pli
a=rtcp-fb:125 nack 
a=rtcp-fb:125 nack pli
a=rtcp-fb:125 transport-cc 
a=rtpmap:107 rtx/90000
a=fmtp:107 apt=125
a=rtcp-fb:107 nack 
a=rtcp-fb:107 nack pli
a=rtcp-fb:107 transport-cc 
a=rtpmap:108 H264/90000
a=fmtp:108 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f
a=rtcp-fb:108 goog-remb 
a=rtcp-fb:108 ccm fir
a=rtcp-fb:108 nack 
a=rtcp-fb:108 nack pli
a=rtcp-fb:108 nack 
a=rtcp-fb:108 nack pli
a=rtcp-fb:108 transport-cc 
a=rtpmap:109 rtx/90000
a=fmtp:109 apt=108
a=rtcp-fb:109 nack 
a=rtcp-fb:109 nack pli
a=rtcp-fb:109 transport-cc 
a=rtpmap:123 H264/90000
a=fmtp:123 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640032
a=rtcp-fb:123 goog-remb 
a=rtcp-fb:123 ccm fir
a=rtcp-fb:123 nack 
a=rtcp-fb:123 nack pli
a=rtcp-fb:123 nack 
a=rtcp-fb:123 nack pli
a=rtcp-fb:123 transport-cc 
a=rtpmap:118 rtx/90000
a=fmtp:118 apt=123
a=rtcp-fb:118 nack 
a=rtcp-fb:118 nack pli
a=rtcp-fb:118 transport-cc 
a=rtpmap:116 ulpfec/90000
a=rtcp-fb:116 nack 
a=rtcp-fb:116 nack pli
a=rtcp-fb:116 transport-cc 
a=extmap:1 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=ssrc:554659860 cname:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031
a=ssrc:554659860 msid:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031 video
a=ssrc:554659860 mslabel:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031
a=ssrc:554659860 label:video
a=msid:rtckit/53bd9691-40c4-4a58-9165-c7579c4b5031 video
a=sendrecv
a=candidate:4113284106 1 udp 2130706431 101.4.122.16 41267 typ host
a=candidate:4113284106 2 udp 2130706431 101.4.122.16 41267 typ host
a=candidate:3528925834 1 udp 2130706431 172.18.0.1 33655 typ host
a=candidate:3528925834 2 udp 2130706431 172.18.0.1 33655 typ host
a=candidate:233762139 1 udp 2130706431 172.17.0.1 53508 typ host
a=candidate:233762139 2 udp 2130706431 172.17.0.1 53508 typ host
a=candidate:300762037 1 udp 1694498815 178.173.224.70 56107 typ srflx raddr 0.0.0.0 rport 56107
a=candidate:300762037 2 udp 1694498815 178.173.224.70 56107 typ srflx raddr 0.0.0.0 rport 56107
a=end-of-candidates

Best withes~

I try to add ICE Server In localhost and use stun:stun.l.google.com:19302, and ask from chatGPT, it all didn't works.

答案1

得分: 2

默认情况下，Pion不启用ICE-TCP候选项。

您可以通过SettingEngine.SetICETCPMux来启用它们。

请参考examples/ice-tcp以获取如何使用此API的完整示例。

祝您好运，并感谢您使用Pion！

英文:

By default Pion doesn't enable ICE-TCP candidates.

You can enable them via the SettingEngine.SetICETCPMux

See examples/ice-tcp for a full featured example of how to use this API.

Best of luck, and thanks for using Pion!

huangapple
  • 本文由 发表于 2023年4月13日 21:09:24
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