如何在 tkinter (Python3.x) 中单击鼠标逐帧显示？

Question

我有来自几个来源的关于堆栈溢出的代码，这些代码是我放在一起的。它播放视频并记录 window 中的点击位置。我希望它逐帧播放并在每次单击后前进。我不确定如何开始。

video_name = input_file()
video = imageio.get_reader(video_name)

def stream(label):
    for image in video.iter_data():
        image_frame = Image.fromarray(image)
        frame_image = ImageTk.PhotoImage(image_frame)
        label.config(image=frame_image)
        label.image = frame_image


if __name__ == "__main__":
    def leftClick(event):
        x = root.winfo_pointerx() - root.winfo_rootx()
        y = root.winfo_pointery()- root.winfo_rooty()
        print(x, y)
    root = tk.Tk()
    my_label = tk.Label(root)
    my_label.bind("<Button-1>", leftClick)
    my_label.bind("<Button-3>", rightClick)
    my_label.pack()
    thread = threading.Thread(target=stream, args=(my_label,))
    thread.daemon = 1
    thread.start()
    root.mainloop()

感谢您对我的任何建议。

Answer 1

您应该使用 video.get_data(...) 加载帧而不是使用 for 循环。您也不需要使用 thread 从视频中读取帧，使用点击事件处理程序。以下是您的代码的修改版本作为示例：

frame_index = 0 # current displayed frame index in the video file

def stream(label, offset=0):
    global frame_index
    try:
        # read a frame image from video file
        image = video.get_data(frame_index+offset)
        # convert the image to tkinter supported format
        image_frame = Image.fromarray(image)
        frame_image = ImageTk.PhotoImage(image_frame)
        label.config(image=frame_image)
        label.image = frame_image
        # update frame_index if image is loaded successfully
        frame_index += offset
    except Exception as ex:
        print('Error loading frame:', ex)

if __name__ == "__main__":
    video_name = input_file()
    video = imageio.get_reader(video_name)
    root = tk.Tk()
    my_label = tk.Label(root)
    my_label.bind("<Button-1>", lambda e: stream(my_label, +1))
    my_label.bind("<Button-3>", lambda e: stream(my_label, -1))
    my_label.pack()
    stream(my_label) # load first frame
    root.mainloop()
    video.close() # close the reader

注意鼠标左键点击用于显示视频中的下一张图片，鼠标右键点击用于显示视频中的上一张图片文件。

如何在 tkinter (Python3.x) 中单击鼠标逐帧显示？

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