当我在终端上运行以下Gstreamer Receiver命令时,它可以正常工作。
gst-launch-1.0 -v udpsrc port = 5004!'应用程序/ x-rtp,有效载荷= 96,编码名称= H264'! rtpjitterbuffer模式= 1! rtph264depay! h264parse!解码器!视频转换!autovideosink
我需要使用OpenCV的Gstreamer API捕获这些帧并进行一些处理。我在C ++代码中使用了确切的管道,但是VideoCapture无法启动。代码如下:
#include <opencv2/opencv.hpp>
#include <opencv2/videoio.hpp>
using namespace cv;
#include <iostream>
using namespace std;
int main()
{
VideoCapture cap("udpsrc port=5004 ! application/x-rtp,payload=96,encoding-name=H264 ! rtpjitterbuffer mode=1 ! rtph264depay ! h264parse ! decodebin ! videoconvert ! autovideosink", CAP_GSTREAMER);
if (!cap.isOpened()) {
cerr <<"VideoCapture not opened"<<endl;
exit(-1);
}
while (true) {
Mat frame;
cap.read(frame);
imshow("receiver", frame);
// Process the frame.
if (waitKey(1) == 27) {
break;
}
}
return 0;
}
[当我尝试编译并运行时,我收到:
(Receiver_Teal:2292):GStreamer-CRITICAL **:gst_element_get_state:断言“ GST_IS_ELEMENT(元素)”失败
VideoCapture未打开
尝试用autovideosink
结尾替换appsink
VideoCapture cap("udpsrc port=5004 ! application/x-rtp,payload=96,encoding-name=H264 ! rtpjitterbuffer mode=1 ! rtph264depay ! h264parse ! decodebin ! videoconvert ! appsink", CAP_GSTREAMER);