python - 在python中裁剪视频

Question

我想创建一个可以在特定帧中裁剪视频并将其保存在我的磁盘上的功能
(OpenCV、moviepy 或类似的东西)
我使用参数指定我的函数作为框架的尺寸以及源和目标名称(位置)

def vid_crop(src,dest,l,t,r,b):
  # something
  # goes
  # here

left = 1    #any number (pixels)
top = 2     # ''''
right = 3   # ''''
bottom = 4  # ''''

vid_crop('myvideo.mp4','myvideo_edit.mp4',left,top,right,bottom)

任何建议和想法都非常有帮助

Answer 1

好的，我想你想要这个，

import numpy as np
import cv2

# Open the video
cap = cv2.VideoCapture('vid.mp4')

# Initialize frame counter
cnt = 0

# Some characteristics from the original video
w_frame, h_frame = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)), int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps, frames = cap.get(cv2.CAP_PROP_FPS), cap.get(cv2.CAP_PROP_FRAME_COUNT)

# Here you can define your croping values
x,y,h,w = 0,0,100,100

# output
fourcc = cv2.VideoWriter_fourcc(*'XVID')
out = cv2.VideoWriter('result.avi', fourcc, fps, (w, h))


# Now we start
while(cap.isOpened()):
    ret, frame = cap.read()

    cnt += 1 # Counting frames

    # Avoid problems when video finish
    if ret==True:
        # Croping the frame
        crop_frame = frame[y:y+h, x:x+w]

        # Percentage
        xx = cnt *100/frames
        print(int(xx),'%')

        # Saving from the desired frames
        #if 15 <= cnt <= 90:
        #    out.write(crop_frame)

        # I see the answer now. Here you save all the video
        out.write(crop_frame)

        # Just to see the video in real time          
        cv2.imshow('frame',frame)
        cv2.imshow('croped',crop_frame)

        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    else:
        break


cap.release()
out.release()
cv2.destroyAllWindows()