91 lines
3.2 KiB
Python
91 lines
3.2 KiB
Python
import os
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from PIL import Image
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from decord import VideoReader
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from config import PATH_CONFIG
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class VideoMonitor:
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def __init__(self, recordings_path):
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self.recordings_path = recordings_path
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self.images_path = PATH_CONFIG['images']
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# 确保images目录存在
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if not os.path.exists(self.images_path):
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os.makedirs(self.images_path)
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def _save_first_frame(self, video_path):
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"""从视频中截取第一帧并保存为jpg"""
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try:
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# 获取对应的图片保存路径
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rel_path = os.path.relpath(video_path, self.recordings_path)
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camera_dir = os.path.dirname(rel_path)
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image_dir = os.path.join(self.images_path, camera_dir)
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# 确保对应的相机目录存在
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if not os.path.exists(image_dir):
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os.makedirs(image_dir)
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# 构建图片保存路径（使用相同的文件名，但改为jpg后缀）
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image_name = os.path.splitext(os.path.basename(video_path))[0] + '.jpg'
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image_path = os.path.join(image_dir, image_name)
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# 如果图片已存在，则跳过
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if os.path.exists(image_path):
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return
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# 读取视频第一帧
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vr = VideoReader(video_path)
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frame = vr[0].asnumpy()
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# 将帧保存为jpg
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image = Image.fromarray(frame)
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image.save(image_path)
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print(f"已保存首帧图片: {image_path}")
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except Exception as e:
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print(f"保存视频首帧失败 {video_path}: {str(e)}")
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def monitor_directories(self):
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"""监控目录变化"""
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try:
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print(f"开始监控目录: {self.recordings_path}")
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while True:
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try:
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# 处理所有视频文件
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for camera_dir in os.listdir(self.recordings_path):
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camera_path = os.path.join(self.recordings_path, camera_dir)
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if not os.path.isdir(camera_path):
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continue
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for video_file in os.listdir(camera_path):
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if not video_file.endswith('.avi'):
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continue
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video_path = os.path.join(camera_path, video_file)
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self._save_first_frame(video_path)
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print("等待新视频文件...") # 添加此行
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# 等待一段时间再检查新文件
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import time
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time.sleep(300) # 每10秒检查一次
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except Exception as e:
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print(f"监控过程出错: {str(e)}")
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time.sleep(10)
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except KeyboardInterrupt:
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print("\n程序已终止")
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except Exception as e:
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print(f"\n程序异常终止: {str(e)}")
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raise
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def main():
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try:
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recordings_path = PATH_CONFIG['recordings']
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monitor = VideoMonitor(recordings_path)
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monitor.monitor_directories()
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except Exception as e:
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print(f"\n未预期的错误: {str(e)}")
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if __name__ == "__main__":
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main() |