代码生成（Monibuca v4 结合gosip库实现gb28181 能接入设备，并使用golang开源库将流转码为websocket-flv播放

很高兴为您解答这个问题！下面是一个实现 GB28181 设备接入并将流转码为 WebSocket-FLV 播放的代码示例，该示例使用 Monibuca v4 和 gosip 库。

首先，您需要使用 gosip 库来与 GB28181 设备进行通信。以下是使用 gosip 库获取设备信息的示例代码：

package main

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/xenolf/lego/log"
	"github.com/yuntifree/gosip/sip"
	"github.com/yuntifree/gosip/sip/header"
	"github.com/yuntifree/gosip/util"
	"net/http"
)

func main() {
	router := gin.Default()

	router.GET("/device/:id/info", func(c *gin.Context) {
		id := c.Param("id")
		deviceIp := "192.168.1.100" // replace with your device IP address
		devicePort := "5060" // replace with your device port number

		// create SIP client
		client := sip.NewClient(deviceIp, devicePort)
		err := client.Connect()
		if err != nil {
			log.Println(err)
			c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to connect to device"})
			return
		}

		// create SIP request
		cSeq := 1
		fromUri := sip.NewURI(fmt.Sprintf("sip:%s@%s:%s", id, deviceIp, devicePort))
		toUri := sip.NewURI(fmt.Sprintf("sip:%s@%s:%s", id, deviceIp, devicePort))
		callId := util.GenerateCallID()
		req := sip.NewRequest(sip.MethodOptions, fromUri, toUri, callId, cSeq)

		// add headers
		req.AppendHeader(header.NewAccept(header.SDP))
		req.AppendHeader(header.NewUserAgent("Monibuca"))

		// send SIP request
		resp, err := client.SendRequest(req)
		if err != nil {
			log.Println(err)
			c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get device info"})
			return
		}

		// parse SIP response
		if resp.StatusCode() != sip.StatusOK {
			log.Println("invalid response status code")
			c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get device info"})
			return
		}
		body, err := resp.Body()
		if err != nil {
			log.Println(err)
			c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to get device info"})
			return
		}
		deviceInfo := string(body)
		log.Println(deviceInfo)
		c.JSON(http.StatusOK, gin.H{"info": deviceInfo})
	})

	router.Run(":8080")
}

接下来，您需要使用 Monibuca v4 来转码流并将其推送到 WebSocket。以下是一个使用 Monibuca v4 的示例代码：

package main

import (
	"github.com/Monibuca/engine"
	"github.com/Monibuca/engine/avformat"
	"github.com/Monibuca/engine/avformat/mpegts"
	"github.com/Monibuca/engine/avformat/rtmp"
	"github.com/Monibuca/engine/gateway"
	"github.com/Monibuca/engine/source"
	"github.com/Monibuca/engine/streams"
	"github.com/Monibuca/plugin-gateway-httpflv"
	"github.com/Monibuca/plugin-gateway-rtmp"
	"github.com/Monibuca/plugin-gateway-webrtc"
	"github.com/gin-gonic/gin"
	"github.com/satori/go.uuid"
	"net/http"
)

func main() {
	router := gin.Default()

	// create Monibuca gateway
	gateway.New("Monibuca")

	// add HTTP-FLV gateway plugin
	gateway.RegisterPlugin(httpflv.NewHttpflvPlugin())

	// add RTMP gateway plugin
	gateway.RegisterPlugin(rtmp.NewRtmpPlugin())

	// add WebRTC gateway plugin
	gateway.RegisterPlugin(webrtc.NewWebRTCPlugin())

	router.GET("/stream/:id", func(c *gin.Context) {
		id := c.Param("id")
		stream, err := streams.GetStream(id)
		if err != nil {
			c.JSON(http.StatusNotFound, gin.H{"error": "stream not found"})
			return
		}

		// create WebSocket-FLV session
		sessionId := uuid.NewV4().String()
		session, err := httpflv.NewWebSocketSession(c.Writer, c.Request, sessionId)
		if err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to create WebSocket session"})
			return
		}

		// add WebSocket-FLV session to stream
		stream.AddSubscriber(session)

		// start transcoding
		transcoding := engine.NewTranscoding(id, "ws://localhost:8080", sessionId, "flv")
		transcoding.AddInput(source.NewSource(stream))
		transcoding.AddOutput(avformat.NewOutput("ws://localhost:8080", sessionId))
		mpegts.Push(transcoding)

		// wait until transcoding is finished
		<-transcoding.Done()

		// remove WebSocket-FLV session from stream
		stream.RemoveSubscriber(session)

		// close WebSocket-FLV session
		session.Close()
	})

	router.Run(":8080")
}

请注意，上面的示例代码仅用于演示。您需要根据您的实际需求进行修改和调整。

希望这可以帮助到您！