Error when testing deepstream-sdk-4.0

when i testing yolov3 demo by deepstream-sdk-4.0,get errors as follows

nvidia@nvidia-desktop:/media/nvidia/disk1/deepstream_sdk_v4.0_jetson/sources/objectDetector_Yolo$ deepstream-app -c deepstream_app_config_yoloV3.txt
** ERROR: <create_multi_source_bin:653>: Failed to create element ‘src_bin_muxer’
** ERROR: <create_multi_source_bin:715>: create_multi_source_bin failed
** ERROR: <create_pipeline:967>: create_pipeline failed
** ERROR: main:632: Failed to create pipeline
App run failed


Hi niuniu_niu1,

The DeepStream SDK 4.0 support with Jetson TX2 from JetPack 4.2.1, please help to update it.
You can also refer to How-To Guides: Custom YOLO Model in DeepStream YOLO App


how about Jetson AGX XAVIER? the same?