How to set the gstreamer plugins to customize the receive video windows position(x,y) on the screen？

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

Hello，I process the video which comes from the USB camera on AGX Xavier，and use the gstreamer encode every frame to H.264 Transmit to PC by Ethernet.
the PC as the recevie terminal which decodes the H.264 stream use gstreamer plugins (ubuntu 18.04)

So，how to use the gsteamer plugin set the video stream display windows to the specified position on the screen

my send end（AGX Xavier）program is

#include <opencv2/opencv.hpp>
#include <iostream>

using namespace std;
using namespace cv;

int main(int argc, char* argv[])
{
	cv::VideoCapture cap("v4l2src device=/dev/video0 ! video/x-raw, framerate=30/1, width=(int)1920, height=(int)1080 ! videoconvert ! appsink ");

	VideoWriter video;
  video.open("appsrc ! autovideoconvert ! omxh264enc bitrate=30000000 peak-bitrate=30500000 ! video/x-h264,stream-format=byte-stream! h264parse ! rtph264pay ! udpsink host=192.168.1.101 port=5001 sync=false ",cv::CAP_GSTREAMER,0,30,Size(1920,1080),true); 

	if (!video.isOpened()) 
	{
	   printf("can't create writer\n");
	   return -1;
	}

	Mat img;

	int nframe=0;

	while(1)
	{
	  
		cap.read(img);

	       video.write(img);

	}
return 0;
}

my recevie end（PC ubuntu18.04）use gstreamer plugin command to decode the H.264 and display the video stream

sudo /usr/bin/gst-launch-1.0 udpsrc port=5001 ! application/x-rtp,encoding-name=H264,payload=96 ! tee name=t t. ! queue ! rtph264depay ! h264parse ! nvv4l2decoder ! nveglglessink

or

sudo /usr/bin/gst-launch-1.0 udpsrc port=5001 ! application/x-rtp,encoding-name=H264,payload=96 ! rtph264depay ! h264parse ! queue！ avdec_h264 ! xvimagesink

I was try to the videobox ,videomixer,compositor plugins, and they can’t solve my problem

Thank you!!

2

It should be possible to set window position for nveglglessink:

gst-launch-1.0 videotestsrc ! nvvidconv ! nvegltransform ! nveglglessink window-x=100 window-y=100

but that would only be relevant from jetson receiver. For ubuntu PC, I’m afraid you’ll have to patch and rebuild xvimagesink plugin, but the patch may already exist (you may google for it).

4

Hi,
We have developed the plugins to enabled hardware acceleration on Jetson devices. For running gstreamer command on non-Jetson devices, you may go to gstreamer forum to get further support:
http://gstreamer-devel.966125.n4.nabble.com/
Users in the forum can have more experience and provide good suggestion.