diff --git a/src/rtmp_manager.cpp b/src/rtmp_manager.cpp
index f4b9d32..aa9b5f2 100644
--- a/src/rtmp_manager.cpp
+++ b/src/rtmp_manager.cpp
@@ -77,53 +77,25 @@ 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";
 
-    // 双路推流管线：一份流编码后 tee 分支分别送往两个 flvmux+rtmpsink
-    // std::string pipeline_str =
-    //     "v4l2src name=src device=" + cam.device +
-    //     " ! "
-    //     "video/x-raw,format=NV12,width=" +
-    //     std::to_string(width) + ",height=" + std::to_string(height) + ",framerate=" + std::to_string(fps) +
-    //     "/1 ! "
-    //     "mpph264enc bps=" +
-    //     std::to_string(bitrate) + " gop=" + std::to_string(fps) +
-    //     " rc-mode=cbr ! "
-    //     "h264parse ! tee name=t "
-
-    //     // --- 分支1：低延时远控 SRS ---
-    //     "t. ! queue max-size-buffers=5 leaky=downstream ! "
-    //     "flvmux streamable=true name=mux_live "
-    //     "audiotestsrc wave=silence ! audioconvert ! audioresample ! voaacenc ! aacparse ! mux_live. "
-    //     "mux_live. ! rtmpsink location=\"" +
-    //     live_rtmp +
-    //     "\" sync=false async=false "
-
-    //     // --- 分支2：录像 SRS ---
-    //     "t. ! queue max-size-buffers=5 leaky=downstream ! "
-    //     "flvmux streamable=true name=mux_record "
-    //     "audiotestsrc wave=silence ! audioconvert ! audioresample ! voaacenc ! aacparse ! mux_record. "
-    //     "mux_record. ! rtmpsink location=\"" +
-    //     record_rtmp +
-    //     "\" sync=false async=false "
-
-    //     // --- 可选第三分支：AI/检测 ---
-    //     "t. ! queue ! fakesink sync=false";
+    std::string cmd = "v4l2-ctl -d " + cam.device + " --set-fmt-video=width=" + std::to_string(width) +
+                      ",height=" + std::to_string(height) + ",pixelformat=NV12";
+    system(cmd.c_str());
 
     std::string pipeline_str = "v4l2src name=src device=" + cam.device +
-                               " ! video/x-raw,format=NV12 "
-                               " ! videoconvert "
-                               " ! videoscale "
-                               " ! video/x-raw,width=" +
+                               " io-mode=dmabuf "
+                               " ! video/x-raw,format=NV12,"
+                               "width=" +
                                std::to_string(width) + ",height=" + std::to_string(height) +
                                ",framerate=" + std::to_string(fps) +
                                "/1 "
-                               " ! videoconvert "
                                " ! mpph264enc "
+                               "profile=high "
                                "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 leaky=downstream "
+                               " ! queue max-size-buffers=5 max-size-time=0 leaky=downstream "
                                " ! flvmux streamable=true "
                                " ! rtmpsink location=\"" +
                                live_rtmp + "\" sync=false async=false";