I am looking for some help in understanding why the bottom 10 rows of pixels in the frame grab of my RTSP video are “not right” when using cv::VideoCapture with a Gstreamer pipe… but when I am using a normal cv::VideoCapture without Gstreamer… the video is fine.
See cropped frame captures…original frames are 1920 x1080. Notice the lower 10 rows of pixels… in the normal case where I am using
cv::VideoCapture capture(“rtsp://admin:passwd@192.168.1.30:554/cam/realmonitor?channel=1&subtype=0”);
everything is fine.
When I use cv::VideoCapture capture(pipe,cv::CAP_GSTREAMER);
with this pipe…
std::string pipe = “rtspsrc location=rtsp://admin:passwd@192.168.1.30:554/cam/realmonitor?channel=1&subtype=0 ! rtph264depay ! h264parse ! omxh264dec ! video/x-raw(memory:NVMM),format=(string)NV12 ! nvvidconv ! video/x-raw, format=(string)BGRx ! videoconvert ! appsink”;
then the video has trouble on the lower 10 rows of pixels.
I would like to use the Gst pipe since I can take advantage of hardware decode on the Xavier NX… and the CPU load is lower.
Can someone help? THANK YOU so much!
Dave
