Unable to live stream from IP camera

Please let me know how to fix the issue, as i have already followed solutions mentioned in forums but unable to fix it.

OpenCV Version - 3.4.0

Used commands -

gst-launch-1.0 rtspsrc location=rtsp://admin:admin@123@49.206.246.65/cam/realmonitor?channel=3&subtype=0 ! ‘application/x-rtp, media=(string)video’ ! decodebin ! videoconvert ! ximagesink

gst-launch-1.0 rtspsrc location=rtsp://127.0.0.1:8554/test ! ‘application/x-rtp, media=(string)video’ ! decodebin ! videoconvert ! ximagesink

gst-launch-1.0 uridecodebin uri=rtsp://admin:admin@123@49.206.246.65/cam/realmonitor?channel=3&subtype=0 ! nvoverlaysink

Error 1 -

OpenCV Error: Unspecified error (GStreamer: unable to start pipeline
) in cvCaptureFromCAM_GStreamer, file /home/dsjetson/opencv/modules/videoio/src/cap_gstreamer.cpp, line 890
VIDEOIO(cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename)): raised OpenCV exception:

/home/dsjetson/opencv/modules/videoio/src/cap_gstreamer.cpp:890: error: (-2) GStreamer: unable to start pipeline
in function cvCaptureFromCAM_GStreamer

Failed to open camera!

Error 2 -

-bash: !: command not found
dsjetson@dsjetson-desktop:~/gst-rtsp-server-1.14.1/examples$ Setting pipeline to PAUSED …
Pipeline is live and does not need PREROLL …
Progress: (open) Opening Stream
Progress: (connect) Connecting to rtsp://admin:admin@123@49.206.246.65/cam/realmonitor?channel=3
Progress: (open) Retrieving server options
ERROR: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Unauthorized
Additional debug info:
gstrtspsrc.c(6116): gst_rtspsrc_send (): /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
Unauthorized (401)
ERROR: pipeline doesn’t want to preroll.
Setting pipeline to PAUSED …
Setting pipeline to READY …
Setting pipeline to NULL …
Freeing pipeline …

Forum Followed-

https://devtalk.nvidia.com/default/topic/1030866/opencv-problem-with-capturing-rtsp-stream-using-gstreamer-on-tx2/

https://devtalk.nvidia.com/default/topic/1067050/jetson-nano/in-nvidia-nano-how-to-capture-rtsp-stream-from-ip-camera-and-decode-this-stream-coded-by-h264/

Hi,
Please check if uri is correct by running uridecodebin:

gst-launch-1.0 uridecodebin uri=rtsp://admin:admin@123@49.206.246.65/cam/realmonitor?channel=3&subtype=0 ! nvoverlaysink

If it cannot be run successfully, the uri shall be invalid and you should investigate to get correct uri.