yolov5+usb相机

yolov5-6.0
detect.py中

parser.add_argument('--source', type=str, default= '0', help='file/dir/URL/glob, 0 for webcam') #mydata2/images/val

报错1：

TypeError:     return func(*args, **kwargs)
unsupported operand type(s) for *=: 'NoneType' and 'int'

参考yolov5开笔记本摄像头实时检测方法修改,
原dataset.s

print(f'{i + 1}/{n}: {s}... ', end='')
            if 'youtube.com/' in s or 'youtu.be/' in s:  # if source is YouTube video
                check_requirements(('pafy', 'youtube_dl'))
                import pafy
                s = pafy.new(s).getbest(preftype="mp4").url  # YouTube URL
            s = eval(s) if s.isnumeric() else s  # i.e. s = '0' local webcam

注销掉

依然报错1.1：TypeError: unsupported operand type(s) for *=: 'NoneType' and 'int'
或者改为

print(f'{i + 1}/{n}: {s}... ', end='')
            url = eval(s) if s.isnumeric() else s
            if 'youtube.com/' in str(url) or 'youtu.be/' in str(url):  #  if 'youtube.com/' in s or 'youtu.be/' in s:
                check_requirements(('pafy', 'youtube_dl'))
                import pafy
                url = pafy.new(s).getbest(preftype="mp4").url  # YouTube URL
           

报错1.2：

    assert cap.isOpened(), f'Failed to open {s}'
AssertionError: Failed to open 0

yolov5-5.0
依然是，修改datasets.py中

 if 'youtube.com/' in url or 'youtu.be/' in url:  # if source is YouTube video

改为

 if 'youtube.com/' in str(url) or 'youtu.be/' in str(url):

报错：

     shape = img.shape[:2]  # current shape [height, width]
AttributeError: 'NoneType' object has no attribute 'shape'

可能 usb相机 不能超过640,我重新买一个 ，还在路上