diff --git a/src/rtsp_manager.cpp b/src/rtsp_manager.cpp
index 041b844..6d96486 100644
--- a/src/rtsp_manager.cpp
+++ b/src/rtsp_manager.cpp
@@ -22,7 +22,6 @@ void RTSPManager::init()
     LOG_INFO("[RTSP] GStreamer initialized.");
 }
 
-// 创建 media factory
 // 创建 media factory
 GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
 {
@@ -36,11 +35,11 @@ GstRTSPMediaFactory *RTSPManager::create_media_factory(const Camera &cam)
         " ! video/x-raw,format=NV12,width=" + std::to_string(out_width) +
         ",height=" + std::to_string(out_height) +
         ",framerate=" + std::to_string(cam.fps) + "/1"
-                                                  " ! queue max-size-buffers=2 leaky=downstream"
-                                                  " ! mpph264enc bps=2000000 gop=" +
-        std::to_string(cam.fps) +
-        " ! h264parse"
-        " ! rtph264pay name=pay0 pt=96 config-interval=1 )";
+                                                  " ! queue max-size-buffers=1 leaky=downstream" // 最小队列
+                                                  " ! mpph264enc bps=4000000 gop=" +
+        std::to_string(cam.fps) + "  " // 固定 4Mbps
+                                  " ! h264parse"
+                                  " ! rtph264pay name=pay0 pt=96 config-interval=1 )"; // 每秒发送 SPS/PPS
 
     GstRTSPMediaFactory *factory = gst_rtsp_media_factory_new();
     gst_rtsp_media_factory_set_launch(factory, launch_str.c_str());