examples: print write errors (#810)

examples/server/main.go

@@ -15,8 +15,8 @@ import (
 
 // This example shows how to
 // 1. create a RTSP server which accepts plain connections.
-// 2. allow a single client to publish a stream with TCP or UDP.
-// 3. allow multiple clients to read the stream with TCP, UDP or UDP-multicast.
+// 2. allow a single client to publish a stream.
+// 3. allow several clients to read the stream.
 
 type serverHandler struct {
 	server    *gortsplib.Server
@@ -150,7 +150,10 @@ func (sh *serverHandler) OnRecord(ctx *gortsplib.ServerHandlerOnRecordCtx) (*bas
 	// called when receiving a RTP packet
 	ctx.Session.OnPacketRTPAny(func(medi *description.Media, _ format.Format, pkt *rtp.Packet) {
 		// route the RTP packet to all readers
-		sh.stream.WritePacketRTP(medi, pkt) //nolint:errcheck
+		err := sh.stream.WritePacketRTP(medi, pkt)
+		if err != nil {
+			log.Printf("ERR: %v", err)
+		}
 	})
 
 	return &base.Response{