CV2 in OpenCV VideoWriter_ Fourcc() function and cv2 Combined use of videowriter() function

One 、VideoWriter_fourcc() Common coding parameters
parameter list
cv2.VideoWriter_fourcc('M', 'P', '4', 'V')
MPEG-4 code .mp4 You can specify the size of the resulting video
cv2.VideoWriter_fourcc('X','2','6','4')
MPEG-4 code .mp4 You can specify the size of the resulting video
cv2.VideoWriter_fourcc('I', '4', '2', '0')
This parameter is YUV The encoding type , The file name suffix is .avi Wide compatibility , But it produces big files
cv2.VideoWriter_fourcc('P', 'I', 'M', 'I')
This parameter is MPEG-1 The encoding type , The file name suffix is .avi
cv2.VideoWriter_fourcc('X', 'V', 'I', 'D')
This parameter is MPEG-4 The encoding type , The file name suffix is .avi, You can specify the size of the resulting video
cv2.VideoWriter_fourcc('T', 'H', 'E', 'O')
This parameter is Ogg Vorbis, The file name suffix is .ogv
cv2.VideoWriter_fourcc('F', 'L', 'V', '1')
This parameter is Flash video , The file name suffix is .flv
Two 、 Use cases
import cv2
 
 
vid = cv2.VideoCapture('./ship.mp4')
video_frame_cnt = int(vid.get(7))
video_width = int(vid.get(3))
video_height = int(vid.get(4))
video_fps = int(vid.get(5))
 
f = cv2.VideoWriter_fourcc('M', 'P', '4', 'V')#VideoWriter_fourcc For video codec
 
videoWriter = cv2.VideoWriter('./result.mp4', f, video_fps, (video_width, video_height))