问题描述
我有一个 python 项目,它从 ip_camera 读取帧并将其写入 .avi
视频,但它的大小变得太大,例如 1 分钟的记录大小约为 200 MB。我想在写入视频的同时降低视频比特率以减小大小。我尝试了很多方法,但没有一个成功。这是我的代码:
import os
from threading import Thread
import cv2
class VideoCamera(object):
def __init__(self,src=''):
self.capture = cv2.VideoCapture(src)
self.status = False
self.frame = self.capture.read()
self.frame_width = int(self.capture.get(3))
self.frame_height = int(self.capture.get(4))
self.codec = cv2.VideoWriter_fourcc(*'MJPG')
self.video_name = "video.avi"
self.output_video = cv2.VideoWriter(
self.video_name,self.codec,5,(self.frame_width,self.frame_height))
self.stream_thread = Thread(target=self.update,args=())
self.record_thread = Thread(target=self.record,args=())
self.stream_thread.daemon = True
self.stream_thread.start()
def update(self):
while True:
if self.capture.isOpened():
(self.status,self.frame) = self.capture.read()
def record(self):
print('schedule')
while True:
print('stop recording')
self.capture.release()
self.output_video.release()
cv2.destroyAllWindows()
break
try:
if self.status:
self.output_video.write(self.frame)
except AttributeError:
pass
def start_recording(self):
self.record_thread.start()
if __name__ == '__main__':
cam = VideoCamera('rtsp://<username>:<password>@<camera_ip>:<camera_port>')
cam.start_recording()
解决方法
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