fix crash

internal/path/path.go

@@ -558,10 +558,15 @@ func (pa *Path) onReadPublisherSetupPlayPost(req readpublisher.SetupPlayReq) {
 		pa.addReadPublisher(req.Author, readPublisherStatePrePlay)
 	}
 
+	var ti []streamproc.TrackInfo
+	if pa.sp != nil {
+		ti = pa.sp.TrackInfos()
+	}
+
 	req.Res <- readpublisher.SetupPlayRes{
 		Path:       pa,
 		Tracks:     pa.sourceTracks,
-		TrackInfos: pa.sp.TrackInfos(),
+		TrackInfos: ti,
 	}
 }
 

internal/rtspsession/session.go

@@ -224,7 +224,7 @@ func (s *Session) OnSetup(c *rtspconn.Conn, ctx *gortsplib.ServerHandlerOnSetupC
 		s.setuppedTracks[ctx.TrackID] = res.Tracks[ctx.TrackID]
 
 		var ssrc *uint32
-		if res.TrackInfos[ctx.TrackID].LastSSRC != 0 {
+		if res.TrackInfos != nil && res.TrackInfos[ctx.TrackID].LastSSRC != 0 {
 			ssrc = &res.TrackInfos[ctx.TrackID].LastSSRC
 		}