error2

1.cv2.error: OpenCV(3.4.3) /home/pi/opencv-python/opencv/modules/imgproc/src/color.cpp:181: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'

pi@raspberrypi:~ $ raspistill -o a.jpg -t 1000
mmal: Cannot read camera info, keeping the defaults for OV5647
mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)
mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)
mmal: Failed to create camera component
mmal: main: Failed to create camera component
mmal: Camera is not detected. Please check carefully the camera module is installed correctly

sudo apt-get install python-picamera

python-picamera 已经是最新版 (1.13)。

pi@raspberrypi:~ $ vcgencmd get_camera

supported=1 detected=0

pi@raspberrypi:~ $ ls /dev/video*

/dev/video1 /dev/video10 /dev/video11 /dev/video12 /dev/video2

3.`

Namespace(agnostic_nms=False, augment=False, classes=None, conf_thres=0.25, device='', exist_ok=False, img_size=640, iou_thres=0.45, name='exp', nosave=False, project='runs/detect', save_conf=False, save_txt=False, source='0', update=False, view_img=False, weights='yolov5s.pt')
Fusing layers... 
Model Summary: 224 layers, 7266973 parameters, 0 gradients
1/1: 0... Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/backend.py", line 1213, in wrapper
    result = method(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/thonny/backend.py", line 1200, in wrapper
    return method(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/thonny/backend.py", line 1272, in _execute_prepared_user_code
    exec(statements, global_vars)
  File "/home/pi/Desktop/ZL-PI/yolov5-5.0/detect.py", line 179, in <module>
    detect()
  File "/home/pi/Desktop/ZL-PI/yolov5-5.0/detect.py", line 51, in detect
    dataset = LoadStreams(source, img_size=imgsz, stride=stride)
  File "/home/pi/Desktop/ZL-PI/yolov5-5.0/utils/datasets.py", line 279, in __init__
    if 'youtube.com/' in url or 'youtu.be/' in url:  # if source is YouTube video
TypeError: argument of type 'int' is not iterable

在dataset.py279行的这两处改成str类型

https://blog.youkuaiyun.com/Tshaxz/article/details/121735482