Videocapture blocked! please help

Autonomous Machines Jetson & Embedded Systems Jetson Nano
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1

i re-compile opencv + opencv_contrib 4.5.1, with CUDA on, then i install *.so into /usr/local/, everything is ok.
BUT! my c++ program use videocapture to open a rtsp url stream, like this:
“rtsp://172.16.100.56:554/ch0.liv”
the c++ code:
cv::VideoCapture cap(input);
then i get the ERROR, the process never go , it is hang!

image

what is the problem? please help!

3

Hi,
Please check if you can run gst-launch-1.0 command:

$ gst-launch-1.0 uridecodebin uri=rtsp://_RTSP_IP_ADDRESS_ ! nvoverlaysink

If it works in the command, please try the python sample:
Doesn't work nvv4l2decoder for decoding RTSP in gstreamer + opencv - #3 by DaneLLL

4

i’m sorry , it 's not work ! look:

image
image1066×297 13.2 KB

hang up!!

5

Hi,
Please share brand and model ID(ex: Hikvision DS-2CD202WF-I). And does the IP camera support H265? If it supports H265, please configure to H265 and give it a try.

6

nvidia jetpack origin opencv is 4.1.1, but not have contrib module, so i uninstall origin, i re-compile opencv, orgin opencv it work ok with same code, but i compiled opencv not work!
my cmake cmd like this:
cmake -D OPENCV_GENERATE_PKGCONFIG=ON -D OPENCV_EXTRA_MODULES_PATH=…/…/opencv_contrib-4.5.1/modules -D WITH_GSTREAMER=ON -D WITH_GSTREAMER_0_10=OFF -D WITH_LIBV4L=ON -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local …

so what is the problem？？

7

Hi,
It looks to be an issue in gstreamer instead of OpenCV. Looks like the stream cannot be well decoded. If it is decodable, you should see video playback in running uridecodebin ! nvoverlaysink. We would suggest try H265 if your source can output H265 stream.

9