直播：PLI 关键帧请求、观众 RTCP 读取、断线自动重连

Made-with: Cursor

server/pkg/weblive/hub.go

@@ -168,9 +168,19 @@ func (h *Hub) attachForwardersToViewerPC(v *viewerSession) {
 		if err != nil {
 			continue
 		}
-		if _, err := v.pc.AddTrack(lt); err != nil {
+		rtpSender, err := v.pc.AddTrack(lt)
+		if err != nil {
 			continue
 		}
+		// Drain RTCP feedback to keep interceptors/senders healthy.
+		go func() {
+			rtcpBuf := make([]byte, 1500)
+			for {
+				if _, _, e := rtpSender.Read(rtcpBuf); e != nil {
+					return
+				}
+			}
+		}()
 		tf.addViewer(v.id, lt)
 	}
 }