基于DeepSeek开发实战：抖音无水印视频下载爬虫

Developer-YC

2674人浏览 · 2025-02-21 23:56:24

Developer-YC · 2025-02-21 23:56:24 发布

引言

嘿，小伙伴们！今天我要跟大家吐槽一下，那些让人抓狂的抖音短视频提取瞬间！😤

你是不是也遇到过，明明看到一个超赞的舞蹈视频，想学着跳一跳，或者，有时候看到一个搞笑段子，想分享给朋友却发现，哎？点开分享发现视频无法下载或作者关闭了下载功能？简直急死人了！😂💔

真是让人无语啊！这些抖音短视频的提取困难，简直就是我们追求快乐和分享乐趣路上的绊脚石！😡🚫

一、需求分析与技术选型

1.1 核心需求

通过抖音分享链接实现：

自动解析短链接
获取高清视频文件
保存至本地

1.2 技术方案

语言：Python 3.9
核心库：requests、urllib、re
AI辅助：DeepSeek-Coder-33B

二、环境准备

pip install requests urllib3 regex

三、通过DeepSeek生成核心代码

3.1 提示词设计

"""
你是一个资深的Python爬虫工程师，请实现以下功能：
1. 输入抖音分享短链接（如v.douyin.com/xxxxx）
2. 自动解析真实视频ID
3. 绕过抖音Web端的反爬机制
4. 下载最高清版本视频
5. 保存为MP4文件

要求：
- 使用requests库实现
- 包含异常处理
- 需要处理Cookie和Headers
- 输出进度条
"""

3.2 生成代码解析

DeepSeek返回的核心代码框架：

import requests
import re
from urllib.parse import urlparse

class DouyinDownloader:
    def __init__(self):
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
            'Cookie': 'YOUR_COOKIE_HERE'
        }
        self.api_url = "https://www.douyin.com/aweme/v1/web/aweme/detail/"
    
    def get_video_id(self, short_url):
        # 处理短链接重定向
        session = requests.Session()
        resp = session.head(short_url, headers=self.headers, allow_redirects=True)
        return re.findall(r'/video/(\d+)/', resp.url)[0]
    
    def get_video_info(self, video_id):
        params = {'aweme_id': video_id}
        response = requests.get(self.api_url, params=params, headers=self.headers)
        return response.json()
    
    def download_video(self, video_url, filename):
        with requests.get(video_url, headers=self.headers, stream=True) as r:
            r.raise_for_status()
            with open(filename, 'wb') as f:
                for chunk in r.iter_content(chunk_size=8192):
                    f.write(chunk)
    
    def process(self, share_url):
        try:
            video_id = self.get_video_id(share_url)
            data = self.get_video_info(video_id)
            video_url = data['aweme_detail']['video']['play_addr']['url_list'][0]
            self.download_video(video_url.replace('playwm', 'play'), f'douyin_{video_id}.mp4')
            return True
        except Exception as e:
            print(f"Error: {str(e)}")
            return False

四、代码优化与增强

4.1 功能增强

from tqdm import tqdm

def download_video(self, video_url, filename):
    response = requests.get(video_url, headers=self.headers, stream=True)
    total_size = int(response.headers.get('content-length', 0))
    
    with open(filename, 'wb') as f:
        with tqdm(total=total_size, unit='B', unit_scale=True) as pbar:
            for chunk in response.iter_content(chunk_size=1024):
                if chunk:
                    f.write(chunk)
                    pbar.update(len(chunk))

4.2 反爬应对策略

self.headers.update({
    'Referer': 'https://www.douyin.com/',
    'Accept-Encoding': 'gzip, deflate, br',
    'sec-ch-ua': '"Chromium";v="122"'
})

# 随机延时
import random, time
def random_delay(self):
    time.sleep(random.uniform(0.5, 2.0))

五、完整代码实现

import requests
import re
import time
import random
from urllib.parse import urlparse
from tqdm import tqdm

class DouyinDownloader:
    def __init__(self):
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
            'Cookie': 'YOUR_COOKIE_HERE',
            'Referer': 'https://www.douyin.com/'
        }
        self.api_url = "https://www.douyin.com/aweme/v1/web/aweme/detail/"
    
    def get_video_id(self, short_url):
        session = requests.Session()
        session.headers.update(self.headers)
        try:
            resp = session.head(short_url, allow_redirects=True)
            return re.search(r'/video/(\d+)/', resp.url).group(1)
        except Exception as e:
            raise ValueError("Invalid URL format")
    
    def get_video_info(self, video_id):
        self.random_delay()
        params = {'aweme_id': video_id}
        response = requests.get(self.api_url, params=params, headers=self.headers)
        return response.json()
    
    def download_video(self, video_url, filename):
        video_url = video_url.replace('playwm', 'play')  # 解除水印
        response = requests.get(video_url, headers=self.headers, stream=True)
        response.raise_for_status()
        
        total_size = int(response.headers.get('content-length', 0))
        block_size = 1024
        
        with open(filename, 'wb') as f:
            with tqdm(total=total_size, unit='B', unit_scale=True) as pbar:
                for chunk in response.iter_content(block_size):
                    f.write(chunk)
                    pbar.update(len(chunk))
    
    def random_delay(self):
        time.sleep(random.uniform(0.3, 1.5))
    
    def process(self, share_url):
        try:
            print("正在解析链接...")
            video_id = self.get_video_id(share_url)
            print(f"获取到视频ID: {video_id}")
            
            print("请求视频数据...")
            data = self.get_video_info(video_id)
            video_url = data['aweme_detail']['video']['play_addr']['url_list'][0]
            
            print("开始下载视频...")
            filename = f'douyin_{video_id}.mp4'
            self.download_video(video_url, filename)
            
            print(f"\n视频下载完成！保存路径: {filename}")
            return True
        except Exception as e:
            print(f"Error: {str(e)}")
            return False

if __name__ == "__main__":
    downloader = DouyinDownloader()
    url = input("请输入抖音分享链接：")
    downloader.process(url)

六、实际运行效果

6.1 执行流程

请输入抖音分享链接：https://v.douyin.com/iYtjx6Lm/
正在解析链接...
获取到视频ID: 7355210838282833193
请求视频数据...
开始下载视频...
100%|████████████| 4.37M/4.37M [00:12<00:00, 356kB/s]

视频下载完成！保存路径: douyin_7355210838282833193.mp4