Fix wrong SDP for MERCURY camera #708

pkg/rtsp/helpers.go

@@ -38,9 +38,8 @@ func UnmarshalSDP(rawSDP []byte) ([]*core.Media, error) {
 
 		// Fix invalid media type (errSDPInvalidValue) caused by
 		// some TP-LINK IP camera, e.g. TL-IPC44GW
-		rawSDP = bytes.ReplaceAll(rawSDP, []byte("m=application/TP-LINK "), []byte("m=application "))
+		m := regexp.MustCompile("m=application/[^ ]+")
-		// more tplink ipcams
+		rawSDP = m.ReplaceAll(rawSDP, []byte("m=application"))
-		rawSDP = bytes.ReplaceAll(rawSDP, []byte("m=application/tp-link "), []byte("m=application "))
 
 		if err == io.EOF {
 			rawSDP = append(rawSDP, '\n')

pkg/rtsp/rtsp_test.go

@@ -1,8 +1,9 @@
 package rtsp
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestURLParse(t *testing.T) {
@@ -107,3 +108,27 @@ a=sendonly`
 	assert.Nil(t, err)
 	assert.Len(t, medias, 3)
 }
+
+func TestBugSDP4(t *testing.T) {
+	s := `v=0
+o=- 14665860 31787219 1 IN IP4 10.0.0.94
+s=Session streamed by "MERCURY RTSP Server"
+t=0 0
+m=video 0 RTP/AVP 96
+c=IN IP4 0.0.0.0
+b=AS:4096
+a=range:npt=0-
+a=control:track1
+a=rtpmap:96 H264/90000
+a=fmtp:96 packetization-mode=1; profile-level-id=640016; sprop-parameter-sets=Z2QAFqzGoCgPaEAAAAMAQAAAB6E=,aOqPLA==
+m=audio 0 RTP/AVP 8
+a=rtpmap:8 PCMA/8000
+a=control:track2
+m=application/MERCURY 0 RTP/AVP smart/1/90000
+a=rtpmap:95 MERCURY/90000
+a=control:track3
+`
+	medias, err := UnmarshalSDP([]byte(s))
+	assert.Nil(t, err)
+	assert.Len(t, medias, 3)
+}