[ROS2 Foxy] ros2 run learning_node node_object_webcam 报错, 启动摄像头失败

zyd@zyd-pc:$ ros2 run learning node node object webcam[INF0][1709553617.755758190][node_object_webcam]: Ros2节点示例:检测图像中的萃果(python3:104026):Gstreamer-CRITICAL **:20:00:39.108:Trying to dispose element pipelineo, but it is in PAusED instead of the Null state.You need to explicitly set elements to the NuLL state beforedropping the final reference, to allow them to clean up.This problem may also be caused by a refcounting bug in theapplication or some element.
WARN:0] global ./modules/videoio/src/cap_gstreamer.cpp (1053) open opencv | Gstreamer warning: unable to start pipeline
(python3:104026):GStreamer-CRITICAL**:20:00:39.108:Trying to dispose element videoconverto, but it is in PLAYING instead of the NuLL state.You need to explicitly set elements to the NuLL state beforedropping the final reference, to allow them to clean up.This problem may also be caused by a refcounting bug in theapplication or some element.
WARN:0] global ./modules/videoio/src/cap gstreamer.cpp (616) i