[英]How to display the video in tkinter canvas frame by frame?
I am dealing with tkinter and opencv to display frames of video in tkinter canvas.我正在处理 tkinter 和 opencv 以在 tkinter 画布中显示视频帧。 my code is as following :
我的代码如下:
import tkinter as tk
from PIL import ImageTk as itk
from PIL import Image
from tkinter import filedialog as fd
import cv2
window = tk.Tk()
class window_tk():
def __init__(self,main):
self.canvas = tk.Canvas(main, bg='white' )
self.img = itk.PhotoImage(file=self.init_img_route)
self.bg= self.canvas.create_image(0,0,anchor = tk.NW,image=self.img)
self.vid = None
def load_video(self):
self.foldername = fd.askopenfilename(parent=window,initialdir="C:/",title='Select a video file to load.',filetypes=[('video files','*.wmv *.mp4 *.mov *.avi')])
self.label_foldername.config(text='Video Load : '+self.foldername)
self.current_pic_num=0
try:
self.vid = cv2.VideoCapture(self.foldername)
frame_number =0
print(self.vid,self.vid.isOpened())
self.frame_count = 0
if self.vid.isOpened():
vid_w = self.vid.get(cv2.CAP_PROP_FRAME_WIDTH)
vid_h = self.vid.get(cv2.CAP_PROP_FRAME_HEIGHT)
vid_f = self.vid.get(cv2.CAP_PROP_FPS)
ret,frame = self.vid.read()
#cv2.imshow('frame',frame)
frame_convert = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
#print(self.frame_count, vid_w,vid_h,vid_f,frame.shape)
imgg = itk.PhotoImage(Image.fromarray(frame_convert))
self.canvas.itemconfig(self.bg, image = imgg)
self.canvas.pack(fill='both',expand=1)
# frame_number+=1
except IndexError:
pass
I confirmed that frame has successfully loaded by checking it as cv2.imshow(), but The canvas only shows the white empty image.我通过将其检查为 cv2.imshow() 来确认该框架已成功加载,但画布仅显示白色空图像。 Is there anything I missed ?
有什么我错过的吗?
I found answer and leave the solution for my study.我找到了答案并将解决方案留给我的研究。
I changed imgg to self.img and let it globally used in class.我把imgg改成了self.img,让它在课堂上全局使用。
I don't know why it solved the problem so if anyone can explain the reason thank you very much.我不知道为什么它解决了问题,所以如果有人能解释原因,非常感谢。
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