RTSP Video Output Gstreamer Error: no element "nvv4l2h264"

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
1

I am getting the following error when trying to run RTSP output from OpenCV: [ WARN:0] global …/modules/videoio/src/cap_gstreamer.cpp (1424) open OpenCV | GStreamer warning: error opening writer pipeline: no element “nvv4l2h264”
Failed to open output

I have referenced the code in the following link: OpenvCV, Gstreamer, Python camera capture/access and streaming to RTP

My platform is Nvidia ORIN AGX 64GB

My goal is simply to take a webcam input and route it out to a RTSP link. Thanks in advance for your time.

2

Hi,
We support jetson_multimedia_api and gstreamer. Please make sure you have checked the document:
https://docs.nvidia.com/jetson/archives/r36.3/DeveloperGuide/SD/Multimedia.html
https://docs.nvidia.com/jetson/archives/r36.3/ApiReference/index.html
There are some examples in

Q: Is there any example of running RTSP streaming?
Q: Is there an example for running UDP streaming?
Q: I have a USB camera. How can I launch it on AGX Orin?

For further issues, please share a method to replicate the issue through gstreamer command, or either sample. We will set up developer kit and check.

Thanks!

3

Hi,
Even when I use the following command in the CLI:
gst-launch-1.0 nvarguscamerasrc !
‘video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080,
format=(string)NV12, framerate=(fraction)30/1’ ! nvv4l2h264enc !
bitrate=8000000 ! h264parse ! qtmux ! filesink
location=<filename_h264.mp4> -e

I still get the encoder error. It is like gstreamer is not acknowledging any available encoders.

WARNING: erroneous pipeline: no element “nvv4l2h264enc”

5

Hi,
If you use Jetpack 6, please run the commands

Accelerated GStreamer — NVIDIA Jetson Linux Developer Guide 1 documentation

and see whether the plugins are present.

6

Thanks DaneLLL. I was using an earlier version of Jetpack so it was gstreamer-1.0 instead of the l4t-gstreamer.

I got your code your run without error now. The camera is open and running but the issue that I am running into is that I cannot see the video stream through VLC on another network device.

7

Hi,
Does this UDP setup work?
Jetson AGX Orin FAQ

Would like to clarify if the failure only occurs in RTSP.

8

Getting this output:
WARNING: erroneous pipeline: no element “avdec_h264” on the x86 machine

9

UDP works on the receiving machine with the following command from your post:
gst-launch-1.0 videotestsrc is-live=1 ! video/x-raw,width=1280,height=720,format=I420 ! timeoverlay valignment=4 halignment=1 ! nvvidconv ! ‘video/x-raw(memory:NVMM),width=1280,height=720’ ! nvv4l2h264enc insert-sps-pps=1 idrinterval=15 ! h264parse ! mpegtsmux ! udpsink host=/x86 receive ip/ port=5000 sync=0

10

Hi,
Do you mean you can run this on AGX Orin device:

$ gst-launch-1.0 videotestsrc is-live=1 ! video/x-raw,width=1280,height=720,format=I420 ! timeoverlay valignment=4 halignment=1 ! nvvidconv ! ‘video/x-raw(memory:NVMM),width=1280,height=720’ ! nvv4l2h264enc insert-sps-pps=1 idrinterval=15 ! h264parse ! mpegtsmux ! udpsink host=/x86 receive ip/ port=5000 sync=0

But this command fails on x86 host PC:

$ gst-launch-1.0 udpsrc port=5000 ! 'application/x-rtp,encoding-name=H264,payload=96' ! rtph264depay ! avdec_h264 ! xvimagesink sync=0
11

Correct, but the command you used on in this comment for the ORIN fails. The following command works on the ORIN:

gst-launch-1.0 videotestsrc is-live=1 ! video/x-raw,width=1280,height=720,format=I420 ! timeoverlay valignment=4 halignment=1 ! nvvidconv ! ‘video/x-raw(memory:NVMM),width=1280,height=720’ ! nvv4l2h264enc insert-sps-pps=1 idrinterval=15 ! h264parse ! mpegtsmux ! udpsink host=192.168.1.65 port=5003 sync=0

The host PC can receive this video through VLC just not through the command you have posted.

12

Hi,
Probably the x86 machine misses some gstreamer packages so avdec_h264 plugin is absent. May use VLC player to try RTSP:
Jetson AGX Orin FAQ

Please try to run RTSP server through test-launch on AGX Orin device and use VLC player to decode it on x86 machine. This is supposed to work since UDP works.