python爬虫小案例：获取B*站视频数据

嗨喽，大家好呀~这里是爱看美女的茜茜呐

第三方模块:

• requests >>> pip install requests

如何安装python第三方模块:

1. win + R 输入 cmd 点击确定, 输入安装命令 pip install 模块名 (pip install requests) 回车

2. 在pycharm中点击Terminal(终端) 输入安装命令

环境介绍:

• python 3.8 解释器

• pycharm 编辑器

• ffmpeg.exe

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python源码、视频教程、插件安装教程、资料我都准备好了，直接在文末名片自取就可

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案例思路

一. 需求分析

如何采集单个的视频

视频在哪里?

window.playinfo=

二. 代码实现

1. 核心编程

2. 爬虫开发

3. 数据分析

4. 网站开发

代码展示

导入模块

'''
python资料获取看这里噢！！ 小编 V：Pytho8987（记得好友验证备注：6 否则可能不通过）
即可获取：文章源码/教程/资料/解答等福利，还有不错的视频学习教程和PDF电子书！
'''
import requests
import re
import json
import subprocess
import os

if not os.path.exists('data'):
    os.mkdir('data')

模拟伪装

headers = {
    'cookie': "buvid3=355AA300-6A61-04E5-A05C-E891D886F69632716infoc; b_nut=1675085932; i-wanna-go-back=-1; _uuid=387EA3810-FBF5-E92C-827E-2510B578C5B9A33232infoc; buvid4=15C69C98-F6A7-EC6A-872F-E69C1840DD6D33724-023013021-1pW1w45e5fZS9RtebDiGZw%3D%3D; nostalgia_conf=-1; rpdid=|(kmJY|k))lY0J'uY~l|)lmY|; b_ut=5; is-2022-channel=1; buvid_fp_plain=undefined; CURRENT_BLACKGAP=0; LIVE_BUVID=AUTO3216755179681630; header_theme_version=CLOSE; CURRENT_PID=17897430-d93d-11ed-a1f4-675e4c96ff79; FEED_LIVE_VERSION=V8; CURRENT_QUALITY=80; fingerprint=58d6d808ef27a6225c943be7ca980284; buvid_fp=58d6d808ef27a6225c943be7ca980284; enable_web_push=DISABLE; CURRENT_FNVAL=4048; SESSDATA=0f019744%2C1717673066%2Ca41c0%2Ac2CjArLmPZFHNFg3B5H60pjRwiqJSLXDG8l2Pb_74Q11o8NmBWyKegdnFb6ivxUL255pwSVjRoaXFXVmFoRlFXY3VCRTAybEpud2ltaXFkRzZXQ25uZ3h0VGxrdGg3bWcxQ2hJN3d4VEZQRjRRTnd5cUx2TmJfUUdlWVZocVRfb281QnJHSklrTkJ3IIEC; bili_jct=f2a37b8a7351e9987d90f80d72dab593; DedeUserID=422789639; DedeUserID__ckMd5=fc4901c78719b545; home_feed_column=5; browser_resolution=1920-963; bp_video_offset_422789639=873101572088791044; sid=81ais7cc; b_lsid=C410CB11B_18C81D7BCD4; bili_ticket=eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MDMyNDQ2NTEsImlhdCI6MTcwMjk4NTM5MSwicGx0IjotMX0.IXqgmieQsWabRzC7N4FfWaox2gffTBRi6tcnfRzlq4U; bili_ticket_expires=1703244591; PVID=2",
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
    'Referer': 'https://www.bilibili.com/video/BV1oK411C7fT/?vd_source=8f216a44bce0dbe14e3447c34c2ab3e2'
}

请求链接

url = 'https://www.bilibili.com/video/BV1oK411C7fT/?vd_source=8f216a44bce0dbe14e3447c34c2ab3e2'

1. 发送请求

response = requests.get(url, headers=headers)

. 获取数据

html_data = response.text

3. 解析数据

'''
python资料获取看这里噢！！ 小编 V：Pytho8987（记得好友验证备注：6 否则可能不通过）
即可获取：文章源码/教程/资料/解答等福利，还有不错的视频学习教程和PDF电子书！
'''
INITIAL_STATE = re.findall('window.__INITIAL_STATE__=(.*?);\(function\(\)', html_data)[0]
initial_state = json.loads(INITIAL_STATE)
episodes = initial_state['sectionsInfo']['sections'][0]['episodes']
for episode in episodes:
    bvid = episode['bvid']
    b_url = f'https://www.bilibili.com/video/{bvid}'
    b_html = requests.get(b_url, headers=headers).text
    play_info = re.findall('window.__playinfo__=(.*?)', b_html)[0]
    play_info_dict = json.loads(play_info)
    video_url = play_info_dict['data']['dash']['video'][0]['baseUrl']
    audio_url = play_info_dict['data']['dash']['audio'][0]['baseUrl']

4. 保存数据

    print(video_url)
    video_data = requests.get(video_url, headers=headers).content
    with open(f'data/{bvid}.mp4', mode='wb') as f:
        f.write(video_data)
    print(audio_url)
    audio_data = requests.get(audio_url, headers=headers).content
    with open(f'data/{bvid}.mp3', mode='wb') as f:
        f.write(audio_data)

5. 合并音视频

    ffmpeg = rf'ffmpeg -i data/{bvid}.mp4 -i data/{bvid}.mp3 -acodec copy -vcodec copy data/{bvid+"-out.mp4"}'
    subprocess.run(ffmpeg)
    os.remove(f'data/{bvid}.mp4')
    os.remove(f'data/{bvid}.mp3')

尾语

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