短视频去水印技术原理深度解析

import requests

def fetch_video_info(video_id):
    """
    调用抖音API获取视频信息
    :param video_id: 视频ID
    :return: 视频元数据
    """
    # 构造请求头（模拟真实APP）
    headers = {
        'User-Agent': 'com.ss.android.ugc.aweme/xxx',
        'X-SS-REQ-TICKET': '1234567890',
        'X-Gorgon': '生成的签名字符串',
        'X-Khronos': '时间戳',
    }
    
    # API端点（示例，实际会变化）
    api_url = f"https://aweme.snssdk.com/aweme/v1/feed/?aweme_id={video_id}"
    
    try:
        response = requests.get(api_url, headers=headers)
        data = response.json()
        
        # 提取视频信息
        video_data = data['aweme_list'][0]
        return {
            'author': video_data['author']['nickname'],
            'desc': video_data['desc'],
            'play_url': video_data['video']['play_addr']['url_list'][0],
            'download_url': video_data['video']['download_addr']['url_list'][0],
            'cover': video_data['video']['cover']['url_list'][0],
        }
    except Exception as e:
        print(f"请求失败: {e}")
        return None

// 简化的本地处理流程
async function removeWatermarkLocally(videoPath) {
  // 1. 加载视频帧
  const frames = await loadVideoFrames(videoPath);
  
  // 2. AI模型识别水印区域
  const watermarkMask = await aiModel.detect(frames[0]);
  
  // 3. 逐帧处理
  const processedFrames = [];
  for (let frame of frames) {
    // 使用inpainting算法修复水印区域
    const cleanedFrame = await inpaint(frame, watermarkMask);
    processedFrames.push(cleanedFrame);
  }
  
  // 4. 重新编码视频
  const outputVideo = await encodeVideo(processedFrames);
  
  return outputVideo;
}

import asyncio
from concurrent.futures import ThreadPoolExecutor

class BatchDownloader:
    def __init__(self, max_workers=10):
        self.executor = ThreadPoolExecutor(max_workers=max_workers)
        self.semaphore = asyncio.Semaphore(5)  # 并发控制
    
    async def download_video(self, video_url):
        """单个视频下载"""
        async with self.semaphore:
            # 解析链接
            video_info = await self.parse_url(video_url)
            
            # 下载视频
            file_path = await self.download_file(
                video_info['download_url'],
                video_info['filename']
            )
            
            return file_path
    
    async def batch_download(self, urls):
        """批量下载"""
        tasks = [self.download_video(url) for url in urls]
        results = await asyncio.gather(*tasks, return_exceptions=True)
        
        # 统计结果
        success = sum(1 for r in results if not isinstance(r, Exception))
        failed = len(results) - success
        
        return {
            'total': len(urls),
            'success': success,
            'failed': failed,
            'results': results
        }