Jetson Nano 运行测试相机代码错误

如何解决Jetson Nano 运行测试相机代码错误

设备：Jetson Nano

我的经验水平：非常低

我的学习意愿：非常高

import cv2

print(cv2.__version__)

dispW=640

dispH=480
flip=2
#Uncomment These next Two Line for Pi Camera
camSet='nvarguscamerasrc !  video/x-raw(memory:NVMM),width=3264,height=2464,format=NV12,framerate=21/1 ! nvvidconv flip-method='+str(flip)+' ! video/x-raw,width='+str(dispW)+',height='+str(dispH)+',format=BGRx ! videoconvert ! video/x-raw,format=BGR ! appsink'
cam= cv2.VideoCapture(camSet)

#Or,if you have a WEB cam,uncomment the next line
#(If it does not work,try setting to '1' instead of '0')
#cam=cv2.VideoCapture(0)
while True:
ret,frame = cam.read()
cv2.imshow('nanoCam',frame)
if cv2.waitKey(1)==ord('q'):
    break
cam.release()
cv2.destroyAllWindows()

错误：

python3 
Test2.py
4.5.1

[ERROR:0] global /tmp/pip-req-build-zuuo394f/opencv/modules/videoio/src/cap.cpp (140) open VIDEOIO(CV_IMAGES): raised OpenCV exception:

OpenCV(4.5.1) /tmp/pip-req-build-zuuo394f/opencv/modules/videoio/src/cap_images.cpp:253: error: (-5:Bad argument) CAP_IMAGES: can't find starting number (in the name of file): nvarguscamerasrc !  video/x-raw(memory:NVMM),framerate=21/1 ! nvvidconv flip-method=2 ! video/x-raw,width=640,height=480,format=BGR ! appsink in function 'icvExtractPattern'


Traceback (most recent call last):
File "Test2.py",line 15,in <module>
cv2.imshow('nanoCam',frame)
cv2.error: OpenCV(4.5.1) /tmp/pip-req-build-zuuo394f/opencv/modules/highgui/src/window.cpp:376: error: (-215:Assertion Failed) size.width>0 && size.height>0 in function 'imshow'

我正在关注的教程： https://www.youtube.com/watch?v=LXuFYRewBRY 摄像头模块： “IMX219-77相机”我认为功能与pi相机相同

解决方法

您正在尝试从 GStreamer 输入中读取数据，您需要告诉 cv2。试试

cam = cv2.VideoCapture(camSet,cv2.CAP_GSTREAMER)

还要确保在 cv2 安装中启用了 GStreamer 支持（据我所知，在某些 Jetson 映像上默认情况下未安装它）。您可以查看

import cv2
print(cv2.getBuildInformation())