data_prepare/check_video.py

import os
import cv2
import subprocess

def check_video_corruption(video_path):
    """检查视频文件是否损坏"""
    try:
        # 方法1：使用OpenCV检查
        cap = cv2.VideoCapture(video_path)
        if not cap.isOpened():
            return True
        
        # 尝试读取第一帧
        ret, frame = cap.read()
        cap.release()
        
        if not ret or frame is None:
            return True
        
        # 方法2：使用ffprobe进一步检查（如果可用）
        try:
            result = subprocess.run(
                ['ffprobe', '-v', 'error', '-select_streams', 'v:0', 
                 '-count_frames', '-show_entries', 'stream=nb_read_frames', 
                 '-of', 'default=nokey=1:noprint_wrappers=1', video_path],
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                text=True,
                timeout=5
            )
            if result.returncode != 0:
                return True
        except (subprocess.TimeoutExpired, FileNotFoundError):
            pass  # ffprobe不可用，仅依赖OpenCV检查
        
        return False
    except Exception as e:
        print(f"检查视频时出错 {video_path}: {e}")
        return True

def find_and_check_mp4_files(root_dir):
    """查找并检查所有MP4文件"""
    print(f"开始扫描目录: {root_dir}")
    
    mp4_files = []
    corrupted_files = []
    
    # 遍历目录树查找所有.mp4文件
    for root, dirs, files in os.walk(root_dir):
        for file in files:
            if file.lower().endswith('.mp4'):
                full_path = os.path.join(root, file)
                mp4_files.append(full_path)
    
    print(f"找到 {len(mp4_files)} 个MP4文件")
    
    # 检查每个文件
    total = len(mp4_files)
    for i, video_path in enumerate(mp4_files, 1):
        print(f"正在检查 [{i}/{total}]: {os.path.basename(video_path)}", end="\r")
        
        if check_video_corruption(video_path):
            corrupted_files.append(video_path)
    
    print(f"\n检查完成！")
    return mp4_files, corrupted_files

def save_corrupted_files(corrupted_files, output_file="corrupted_videos.txt"):
    """将损坏的文件路径保存到文本文件"""
    with open(output_file, 'w', encoding='utf-8') as f:
        for file_path in corrupted_files:
            f.write(file_path + '\n')
    print(f"损坏的文件列表已保存到: {output_file}")

def main():
    # 设置根目录
    root_dir = "/data/shuimu.chen/videomarathon/downloaded_videos/panda"  # 根据实际情况调整路径
    
    # 查找并检查文件
    all_mp4_files, corrupted_files = find_and_check_mp4_files(root_dir)
    
    # 输出统计信息
    print("\n" + "="*50)
    print(f"统计结果:")
    print(f"总MP4文件数: {len(all_mp4_files)}")
    print(f"损坏文件数: {len(corrupted_files)}")
    print(f"正常文件数: {len(all_mp4_files) - len(corrupted_files)}")
    
    if corrupted_files:
        print(f"\n损坏的文件:")
        for file_path in corrupted_files[:10]:  # 只显示前10个
            print(f"  - {os.path.relpath(file_path, root_dir)}")
        if len(corrupted_files) > 10:
            print(f"  ... 还有 {len(corrupted_files) - 10} 个文件")
        
        # 保存损坏文件列表
        save_corrupted_files(corrupted_files)
    else:
        print("\n恭喜！没有发现损坏的视频文件。")

if __name__ == "__main__":
    main()