diff --git a/src/rtmp_manager.cpp b/src/rtmp_manager.cpp
index 30df3da..fd8c312 100644
--- a/src/rtmp_manager.cpp
+++ b/src/rtmp_manager.cpp
@@ -77,23 +77,31 @@ GstElement* RTMPManager::create_pipeline(const Camera& cam)
     const std::string live_rtmp = "rtmp://36.153.162.171:19435/" + app + "/" + stream_name + "?vhost=live";
     const std::string record_rtmp = "rtmp://127.0.0.1:2935/" + app + "/" + stream_name + "?vhost=record";
 
-    std::string pipeline_str = "v4l2src name=src device=" + cam.device +
-                               " io-mode=dmabuf do-timestamp=true "
-                               " ! video/x-raw,format=NV12,"
+    std::string pipeline_str = "v4l2src device=" + cam.device +
+                               " io-mode=dmabuf "
+                               "! video/x-raw,format=NV12,"
                                "width=" +
                                std::to_string(width) + ",height=" + std::to_string(height) +
                                ",framerate=" + std::to_string(fps) +
                                "/1 "
-                               " ! mpph264enc "
-                               "profile=high "
+                               "! queue max-size-buffers=4 leaky=downstream "
+                               "! mpph264enc "
+                               "profile=baseline "  // ⭐ 关键：别用 high
+                               "bframes=0 "         // ⭐ 关键：禁 B 帧
+                               "gop=" +
+                               std::to_string(fps) +
+                               " "
+                               "rc-mode=cbr "
                                "bps=" +
-                               std::to_string(bitrate) + " gop=" + std::to_string(fps) +
-                               " rc-mode=cbr "
-                               " header-mode=each-idr "
-                               " ! h264parse config-interval=1 "
-                               " ! queue max-size-buffers=5 max-size-time=0 leaky=downstream "
-                               " ! flvmux streamable=true "
-                               " ! rtmpsink location=\"" +
+                               std::to_string(bitrate) +
+                               " "
+                               "header-mode=each-idr "
+                               "! h264parse "
+                               "config-interval=1 "
+                               "disable-passthrough=true "
+                               "! queue max-size-buffers=5 leaky=downstream "
+                               "! flvmux streamable=true "
+                               "! rtmpsink location=\"" +
                                live_rtmp + "\" sync=false async=false";
 
     GError* error = nullptr;