类型错误：VideoWriter() 缺少必需参数“frameSize”（位置 5），opencv-python ==4.4.0.42

Question

我想使用以下代码创建 VideoWriter：

  fourcc = cv2.VideoWriter_fourcc(*'mp4v')

  video_writer = cv2.VideoWriter('out.mp4',fourcc,fps,(frame_width,frame_height))

但我收到错误：

   TypeError: VideoWriter() missing required argument 'frameSize' (pos 5)

当我将代码更改为：

   fourcc = cv2.VideoWriter_fourcc(*'mp4v')

   video_writer = cv2.VideoWriter(filename='out.mp4',fourcc=fourcc,fps=fps,frameSize=(frame_width,frame_height))

我收到另一个错误：

   TypeError: VideoWriter() missing required argument 'apiPreference' (pos 2)

所以我将代码更改为：

   fourcc = cv2.VideoWriter_fourcc(*'mp4v')

   video_writer = cv2.VideoWriter(filename='out.mp4',apiPreference=0,fourcc=fourcc,fps=fps,frameSize=(frame_width,frame_height))

我收到错误：

   TypeError: VideoWriter() missing required argument 'params' (pos 6)

我该如何解决它？谁能告诉我如何使用 api:VideoWriter() 吗？非常感谢

Answer 1

好的，以下代码对我有用：

frame_num = int(Cap.get(cv2.CAP_PROP_FRAME_COUNT))
frame_width = int(Cap.get(cv2.CAP_PROP_FRAME_WIDTH))
frame_height = int(Cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
video_writer = cv2.VideoWriter(result,fourcc,fps,(frame_width,frame_height))

Cap.get(cv2.*) 的类型是 float，所以我将其更改为整数