python对视频进行帧处理以及裁减部分区域
视频截取帧
废话不多说直接上代码:
from cv2 import VideoCapture
from cv2 import imwrite
# 定义保存图片函数
# image:要保存的图片名字
# addr;图片地址与相片名字的前部分
# num: 相片,名字的后缀。int 类型
def save_image(image, addr, num):
address = addr + str(num) + '.jpg'
imwrite(address, image)
if __name__ == '__main__':
video_path = "/home/xxx/桌面/data/wx.mp4" #视频路径
out_path = "/home/xxx/桌面/data/AIswitch/out/img_" #保存图片路径+名字
is_all_frame = False #是否取所有的帧
sta_frame = 1 #开始帧
end_frame = 400 #结束帧
######
time_interval = 10 #时间间隔
# 读取视频文件
videoCapture = VideoCapture(video_path)
# 读帧
success, frame = videoCapture.read()
print(success)
i = 0
j = 0
if is_all_frame:
time_interval = 1
while success:
# people1
start_h = 530
start_w = 90
pad_h = 283
pad_w = 240
frame = frame[start_h:start_h+pad_h,start_w:start_w+pad_w,:]
i = i + 1
if (i % time_interval == 0):
if is_all_frame == False:
if i >= sta_frame and i <= end_frame:
j = j + 1
print('save frame:', i)
save_image(frame, out_path, j)
elif i > end_frame:
break
else:
j = j + 1
print('save frame:', i)
save_image(frame, out_path, j)
success, frame = videoCapture.read()