我有使用开放CV录制1分钟长的视频，然后将小视频连接到主视频文件的代码。万一出了什么问题并且系统突然关闭而程序没有正确关闭，这应该是故障安全的。我想在单独的线程中运行视频录制和串联，因为将视频串联起来需要时间，如果不在单独的线程上运行，那么这段时间将浪费在素材中。我的问题是在循环中启动线程时出现的。全部运行一次，然后我得到一个错误，即一个线程只能启动一次。有没有办法可以在线程运行完毕后杀死它，然后在循环中再次启动它？或者还有更好的方法可以编写代码吗？
我试图通过调用del删除线程对象，但是我不知道自己在做什么错
import cv2
import os
from datetime import datetime, timedelta
from threading import *
from moviepy.editor import VideoFileClip, concatenate_videoclips
# Class for concatenating the videos
class VideoConcatenate(Thread):
def run(self):
today = datetime.today().strftime('%Y-%b-%d')
print(datetime.now().strftime('%H:%M:%S') + " Starting video concatenation")
# Define the small video and main video files
clip_small = VideoFileClip('Cam01_'+str(today) + "_small_toAdd" + '.mp4')
clip_main = VideoFileClip('Cam01_'+str(today) + "_main" + '.mp4')
# Define the concatenation order
clip_final = concatenate_videoclips([clip_main, clip_small])
# Write the new/concatenated video file
clip_final.write_videofile('Cam01_'+str(today) + "_main_recent" + '.mp4')
print(datetime.now().strftime('%H:%M:%S') + " Concatenation Finished")
# Rename the the main_recent file to main
# This will overwrite the main video with the main_recent video
os.rename('Cam01_'+str(today) + "_main_recent" + '.mp4', 'Cam01_'+str(today) + "_main" + '.mp4')
# Remove the recently added video
os.remove('Cam01_'+str(today) + "_small_toAdd" + '.mp4')
# Class for recording the videos the videos
class CaptureCamera(Thread):
def run(self):
today = datetime.today().strftime('%Y-%b-%d')
# capture IP camera's live feed
cap = cv2.VideoCapture('rtsp://admin:@10.187.1.146:554/user=admin_password=tlJwpbo6_channel=1_stream=0')
ret, initialFrame = cap.read()
# Settings for the video recording.
fourcc = cv2.VideoWriter_fourcc(*'mp4v')
fps = 20
# Get the frame's size and set the output frame size to 50%
fshape = initialFrame.shape
fheight = fshape[0] # * 50/100
fwidth = fshape[1] # * 50/100
frameSize = (int(fwidth), int(fheight))
print(frameSize)
if cap.isOpened:
print(datetime.now().strftime('%H:%M:%S') + " The IP Camera's feed is now streaming\n")
try:
# Get time that recording started
timeStart = datetime.now()
# check if the day is correct
if datetime.today().strftime('%Y-%b-%d') == today:
# Create main file for the day if doesn't exist
if not os.path.exists('Cam01_'+str(today)+ "_main"+'.mp4'):
print(datetime.now().strftime('%H:%M:%S')+" Creating main file for "+today)
vidOut = cv2.VideoWriter('Cam01_'+str(today) + "_main" + '.mp4', fourcc, fps, frameSize)
recStop = datetime.now()+timedelta(seconds=15)
print(datetime.now().strftime('%H:%M:%S')+" Recording initial 15 seconds")
# Record 15 seconds worth of video so the file is not empty and can be concatenated
while datetime.now() <= recStop:
# read frame
ret, frame = cap.read()
# # resize the frame to 50%
# frame = cv2.resize(frame, frameSize, interpolation = cv2.INTER_AREA)
# Write frame to video file
vidOut.write(frame)
vidOut.release()
print(datetime.now().strftime('%H:%M:%S')+" Created main file for " + today)
else:
print(datetime.now().strftime('%H:%M:%S')+' Cam01_'+str(today) + "_main"+'.mp4'+' already exists')
vidOut = cv2.VideoWriter('Cam01_'+str(today) + "_small" + '.mp4', fourcc, fps, frameSize)
print(datetime.now().strftime('%H:%M:%S')+" Recording for " + today + " from " + datetime.now().strftime('%H:%M:%S'))
# Set stop time for the recording
recStop = datetime.now() + timedelta(seconds=60*1)
print(datetime.now().strftime('%H:%M:%S')+" Recording for duration of 1 mins \n\nPress Ctrl+C on the keyboard to quit \n\n")
while datetime.now() <= recStop:
# read frame
ret, frame = cap.read()
# # resize the frame to 50%
# frame = cv2.resize(frame, frameSize, interpolation = cv2.INTER_AREA)
# Write frame to video file
vidOut.write(frame)
print("Recording ended at " + datetime.now().strftime("%Y-%B-%d, %A %H:%M:%S"))
vidOut.release() # End video write and release the file
# rename the small file to be added to main so a new small file can be created
os.rename('Cam01_'+str(today) + "_small" + '.mp4',
'Cam01_'+str(today) + "_small_toAdd" + '.mp4')
except KeyboardInterrupt:
print("\nProcess Interrupted by User")
if vidOut.isOpened():
vidOut.release() # End video write
cap.release() # Release IP Cameras
os.rename('Cam01_' + str(today) + "_small" + '.mp4',
'Cam01_' + str(today) + "_small_toAdd" + '.mp4')
print("\nRecording ended at " + datetime.now().strftime("%Y-%B-%d, %A %H:%M:%S"))
print(" H:MM:SS.milliseconds")
print("The recording was operated for "+str(datetime.now()-timeStart))
else:
print("The video stream couldn't be reached")
def main():
t1 = CaptureCamera()
t1.daemon = True
t2 = VideoConcatenate()
t2.daemon = True
while True:
if not t1.is_alive():
t1.start()
else:
del t1
t1.run()
t1.join() # Wait for t1 to complete running and join the main thread.
if not t2.is_alive():
t2.start()
else:
del t2
t2.run()
main()
我希望发生的事情是，第一个线程（用于视频录制）一直运行到完成，然后一旦它加入主线程，第二个线程（用于视频串联）将在第一个线程再次运行时运行。基本上，我不希望视频连接是在后台运行的，并且不应中断视频录制。