修复无人观看关闭流相关bug (#4334)

.github/workflows/windows.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: windows-2019
+    runs-on: windows-2022
 
     steps:
       - uses: actions/checkout@v1

src/Common/MultiMediaSourceMuxer.cpp

@@ -514,6 +514,7 @@ EventPoller::Ptr MultiMediaSourceMuxer::getOwnerPoller(MediaSource &sender) {
 }
 
 bool MultiMediaSourceMuxer::close(MediaSource &sender) {
+    MediaSourceEventInterceptor::close(sender);
     _rtmp = nullptr;
     _rtsp = nullptr;
     _fmp4 = nullptr;