Add feature to SETUP new RTSP tracks after PLAY

pkg/rtsp/conn.go

@@ -404,6 +404,12 @@ func (c *Conn) SetupMedia(
 		}
 	}
 
+	// in case the track has already been setup before
+	if codec == nil {
+		c.state = StateSetup
+		return nil, nil
+	}
+
 	// we send our `interleaved`, but camera can answer with another
 
 	// Transport: RTP/AVP/TCP;unicast;interleaved=10-11;ssrc=10117CB7

pkg/rtsp/streamer.go

@@ -20,9 +20,10 @@ func (c *Conn) GetTrack(media *streamer.Media, codec *streamer.Codec) *streamer.
 		}
 	}
 
-	// can't setup new tracks from play state
+	// can't setup new tracks from play state - forcing a reconnection feature
 	if c.state == StatePlay {
-		return nil
+		go c.Close()
+		return streamer.NewTrack(codec, media.Direction)
 	}
 
 	track, err := c.SetupMedia(media, codec)