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import numpy as np
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import cv2
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import os
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import time
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def get_video_list(path):
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video_ext = [".mp4", ".avi",".MP4"]
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video_names = []
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for maindir, subdir, file_name_list in os.walk(path):
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for filename in file_name_list:
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apath = os.path.join(maindir, filename)
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ext = os.path.splitext(apath)[1]
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if ext in video_ext:
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video_names.append(apath)
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return video_names
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def save_seg_video(video_name,frameToStart,frametoStop,videoWriter):
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cap = cv2.VideoCapture(video_name)
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count = 0
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while True:
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success, frame = cap.read()
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# count += 1
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if success:
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print('frametoStop:',frametoStop,'frameToStart:',frameToStart)
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print('correct2= ', count)
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count += 1
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if count <= frametoStop and count > frameToStart: # 选取起始帧
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print('correct= ', count)
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videoWriter.write(frame)
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if not success or count >= frametoStop:
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break
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print('end')
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def get_seg_video(video_file,video_save_path,dertTime):
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# 检查路径
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print("frame image save path：{}".format(video_save_path))
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os.makedirs(video_save_path, exist_ok=True)
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if os.path.isdir(video_file):
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files = get_video_list(video_file)
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else:
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files = [video_file]
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files.sort()
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video_num = len(files)
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for num in range(video_num):
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# 视频名字
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video_name = files[num]
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video_basename = os.path.basename(video_name).split('.')[0]
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cap = cv2.VideoCapture(video_name)
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#帧率
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fps = cap.get(cv2.CAP_PROP_FPS)
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fps = int(fps)
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print(fps)
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# 获得原视频尺寸
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size = (int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)), int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)))
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# 获取视频总帧数
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total_frame = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
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# 每段帧率
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dertF = dertTime * fps
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print('dertF:',dertF)
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#帧率分段
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n = total_frame/dertF
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print(int(n))
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for i in range(int(n) + 1):
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video_name_save = video_save_path + '/' + video_basename + '_' +str(i) + '.avi'
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videoWriter =cv2.VideoWriter(video_name_save,cv2.VideoWriter_fourcc('X','V','I','D'),fps,size)
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start_time = i * dertF
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if i == int(n) + 1:
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stop_time = total_frame
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else:
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stop_time = start_time + dertF
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print(video_name)
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save_seg_video(video_name=video_name,frameToStart=start_time,frametoStop=stop_time,videoWriter=videoWriter)
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if __name__ == '__main__':
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# 每个视频的时长（单位秒）
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dertTime = 5
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video = "dataset/video"
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video_save = 'dataset/video_seg_5s'
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get_seg_video(video_file=video,video_save_path=video_save,dertTime=dertTime)
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