Program will restart if client gets TEARDOWN request; Domain changes if a camera was flipped to another domain.

writer/cmd/main.go

@@ -1,9 +1,11 @@
 package main
 
-import "writer/internal/procRTSP"
+import (
+	"writer/internal/procRTSP"
+)
 
 func main() {
-	err := procRTSP.ProcRTSP(1, "rtsp://intercom-video-2.insit.ru/dp-ohusuxzcvzsnpzzvkpyhddnwxuyeyc")
+	err := procRTSP.StartWriter(1, "rtsp://intercom-video-2.insit.ru/dp-ohusuxzcvzsnpzzvkpyhddnwxuyeyc")
 	if err != nil {
 		panic(err)
 	}

writer/internal/procRTSP/client.go

@@ -1,6 +1,7 @@
 package procRTSP
 
 import (
+	"errors"
 	"fmt"
 	"git.insit.tech/sas/rtsp_proxy/protos/gens"
 	"github.com/bluenviron/gortsplib/v4"
@@ -12,6 +13,7 @@ import (
 	"github.com/pion/rtp"
 	_ "github.com/zaf/g711"
 	"log"
+	"strings"
 	"time"
 	"writer/internal/config"
 	"writer/internal/media"
@@ -24,8 +26,21 @@ var (
 	g711RTPDec  *rtplpcm.Decoder
 )
 
-// ProcRTSP process RTSP protocol and writes H264 and PCM flows into TS container.
+// StartWriter starts the program.
-func ProcRTSP(period int, URI string) error {
+func StartWriter(period int, URI string) error {
+	err := procRTSP(period, URI)
+	if err != nil {
+		// Change domain if a camera was flipped to another domain.
+		err = changeDomain(period, URI, err)
+		if err != nil {
+			return fmt.Errorf("change domain error: %w", err)
+		}
+	}
+	return nil
+}
+
+// procRTSP process RTSP protocol and writes H264 and PCM flows into TS container.
+func procRTSP(period int, URI string) error {
 	// Create FileName structure
 	fn := config.CreateFileName(resolutions, period)
 
@@ -186,5 +201,42 @@ func ProcRTSP(period int, URI string) error {
 		}
 	}()
 
+	// Restart program if client gets TEARDOWN request.
+	c.OnRequest = func(req *base.Request) {
+		if req.Method == base.Teardown {
+			log.Printf("got TEARDOWN request from server: %v", req)
+		}
+
+		go func() {
+			err = procRTSP(period, URI)
+			if err != nil {
+				log.Fatalf("restart RTSP error: %s\n", err)
+			}
+		}()
+	}
+
 	panic(c.Wait())
+
+}
+
+// changeDomain changes domain if a camera was flipped to another domain.
+func changeDomain(period int, URI string, err error) error {
+	err2 := errors.New("404 (Not found)")
+	if errors.As(err, &err2) {
+		if strings.Contains(URI, "video-1") {
+			err = procRTSP(period, strings.Replace(URI, "video-1", "video-2", 1))
+			if err != nil {
+				return err
+			}
+		} else {
+			err = procRTSP(period, strings.Replace(URI, "video-2", "video-1", 1))
+			if err != nil {
+				return err
+			}
+		}
+	} else {
+		panic(err)
+	}
+
+	return nil
 }