10-视频图像读取与保存

1. 截取图像的ROI区域并保存
 1 import cv2
 2 
 3 img_01 = cv2.imread("E:\\zpp\\ImageLabel\\test\\0.jpg")
 4 
 5 # img_01_gray = cv2.cvtColor(img_01, cv2.COLOR_BGR2GRAY)
 6 # res, img_01_bin = cv2.threshold(img_01_gray, 20, 255, cv2.THRESH_BINARY)
 7 
 8 
 9 path = "E:\\zpp\\ImageLabel\\test\\"
10 
11 savePath = "E:\\zpp\\ImageLabel\\test_new\\"
12 
13 for i in range(30):
14 
15     if(i>9):
16         img_path = path +str(i) +".jpg"
17         img_02 = cv2.imread(img_path)
18 
19         img_save_path = savePath +str(i) +".jpg"
20 
21         crop_img = img_02[140:1360, 20:1070,:]
22         img_01[150:1370, 200:1250, :] = crop_img
23         
24     # cv2.imshow("01", crop_img)
25         cv2.imshow("02",  img_01)
26         cv2.imwrite(img_save_path, img_01)
27         
28         cv2.waitKey(1)
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2. 读取连续帧图像，可对每帧图像进行处理，然后保存为视频文件；

 1 import cv2
 2 
 3 #图片路径
 4 imgPath = "E:\\zpp\\ImageLabel\\02_CamAnnoTool\\"
 5 #输出视频路径
 6 video_dir = 'E:\\zpp\\ImageLabel\\02_CamAnnoTool\\out.avi'
 7 #帧率
 8 fps = 30  
 9 #图片数 
10 num = 6
11 #图片尺寸
12 img_size = (1920, 1080)
13 
14 fourcc = cv2.VideoWriter_fourcc('M','J','P','G') #opencv3.0
15 videoWriter = cv2.VideoWriter(video_dir, fourcc, fps, img_size)
16 frame_count =0
17 
18 for i in range(123):
19 
20     imgName = imgPath + str(i)+ ".jpg"
21     frame = cv2.imread(imgName)
22 
23     if i == 122:
24         frame_count = 150
25         
26 
27         
28         for j in range(frame_count):
29             frame = cv2.resize(frame, (1920,1080))
30             videoWriter.write(frame)
31 
32     else:
33         frame_count = 50
34 
35    
36
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3. 读取视频图像，可对每帧图像进行处理，然后保存为新的视频文件。

 1 import cv2
 2 
 3 #输出视频路径
 4 video_dir = 'E:\\zpp\\ImageLabel\\04_CamAnnoTool\\out.avi'
 5 
 6 #帧率
 7 fps = 30  
 8 #图片数 
 9 num = 6
10 #图片尺寸
11 img_size = (1920, 1080)
12 
13 fourcc = cv2.VideoWriter_fourcc('M','J','P','G') #opencv3.0
14 videoWriter = cv2.VideoWriter(video_dir, fourcc, fps, img_size)
15 
16  
17 cap = cv2.VideoCapture("F:/FFOutput/6.mp4")#打开视频
18 i=0
19 while cap.isOpened():
20     ret,frame = cap.read()#读取视频返回视频是否结束的bool值和每一帧的图像
21 
22     if frame  is None:
23         break
24 
25     cv2.imshow('a',frame)
26     cv2.waitKey(1)
27 
28     frame = cv2.resize(frame, (1920,1080))
29     videoWriter.write(frame)
30 
31     # cv2.imwrite("F:/image/Demo04/"+str(i)+".bmp",frame)
32     i = i+1
33     # cv2.destroyAllWindows()
34 
35 img = cv2.imread("E:\\zpp\\ImageLabel\\02_CamAnnoTool\\70.jpg")
36 
37 for j in range(50):
38     frameEnd = cv2.resize(img, (1920,1080))
39     videoWriter.write(frameEnd)
40 
41 print(i)
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posted @ 2020-12-01 16:46  赵家小伙儿  阅读(255)  评论(0)  编辑  收藏  举报