diff --git a/src/rtsp_manager.cpp b/src/rtsp_manager.cpp
index 787601b..ca59b09 100644
--- a/src/rtsp_manager.cpp
+++ b/src/rtsp_manager.cpp
@@ -30,7 +30,12 @@ GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
         " ! video/x-raw,format=NV12,width=" + std::to_string(cam.width) +
         ",height=" + std::to_string(cam.height) +
         ",framerate=" + std::to_string(cam.fps) + "/1"
-                                                  " ! videoconvert ! queue ! mpph264enc ! rtph264pay name=pay0 pt=96 )";
+                                                  " ! queue max-size-buffers=4 leaky=2" // 新增 queue，防止阻塞
+                                                  " ! videoconvert"
+                                                  " ! video/x-raw,format=NV12"          // 固定转换后的格式
+                                                  " ! queue max-size-buffers=4 leaky=2" // 再加一层 queue，隔离 mpph264enc
+                                                  " ! mpph264enc"
+                                                  " ! rtph264pay name=pay0 pt=96 )";
 
     GstRTSPMediaFactory *factory = gst_rtsp_media_factory_new();
     gst_rtsp_media_factory_set_launch(factory, launch_str.c_str());