moviepy音视频剪辑：headblur函数遇到的TypeError: integer argument expected, got float错误的解决方案

运行环境如下：

python版本：3.7
opencv-python版本：4.2.0.34
numpy版本：1.19.0

错误信息:

在调用moviepy1.03版本的headblur函数执行人脸跟踪和模糊化处理时，报如下错误：

  File "F:/study/python/project/moviepyTest/moviepyTest.py", line 63, in <module>
    clip_blurred = clip.fx(vfx.headblur, tracking.xi, tracking.yi, 30) #进行模糊化处理，圆半径设置为30像素
  File "C:\Program Files\Python37\lib\site-packages\moviepy\Clip.py", line 212, in fx
    return func(self, *args, **kwargs)
  File "C:\Program Files\Python37\lib\site-packages\moviepy\video\fx\headblur.py", line 53, in headblur
    return clip.fl(fl)
  File "C:\Program Files\Python37\lib\site-packages\moviepy\Clip.py", line 136, in fl
    newclip = self.set_make_frame(lambda t: fun(self.get_frame, t))
  File "", line 2, in set_make_frame
  File "C:\Program Files\Python37\lib\site-packages\moviepy\decorators.py", line 14, in outplace
    f(newclip, *a, **k)
  File "C:\Program Files\Python37\lib\site-packages\moviepy\video\VideoClip.py", line 644, in set_make_frame
    self.size = self.get_frame(0).shape[:2][::-1]
  File "", line 2, in get_frame
  File "C:\Program Files\Python37\lib\site-packages\moviepy\decorators.py", line 89, in wrapper
    return f(*new_a, **new_kw)
  File "C:\Program Files\Python37\lib\site-packages\moviepy\Clip.py", line 93, in get_frame
    return self.make_frame(t)
  File "C:\Program Files\Python37\lib\site-packages\moviepy\Clip.py", line 136, in <lambda>
    newclip = self.set_make_frame(lambda t: fun(self.get_frame, t))
  File "C:\Program Files\Python37\lib\site-packages\moviepy\video\fx\headblur.py", line 42, in fl
    blurred = cv2.blur(orig, (r_blur, r_blur))
TypeError: integer argument expected, got float

Process finished with exit code 1

解决办法：

以下两种方法任选一种即可：
1、在调用headblur函数时，设置参数值为一个整数；
2、修改headblur函数，将if r_blur is None: r_blur = 2 * r_zone / 3
改为：if r_blur is None: r_blur = int(2 * r_zone / 3)

更多moviepy的介绍请参考《PyQt+moviepy音视频剪辑实战文章目录》或《moviepy音视频开发专栏》。

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