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#知识点
#Requests模块使用
#Json数据提取
#re模块使用
#os模块使用
#ffmpeg工具使用
import json
import os
import pprint
import re
from lxml import etree#1.爬取视频页的网页源代码
import requests
headers={'referer':'https://www.bilibili.com','User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36'
}
def get_paly_url(url):r=requests.get(url,headers=headers)#2.提取视频和音频的播放地址info=re.findall('window.__playinfo__=(.*?)</script>',r.text)[0]video_url=json.loads(info)['data']['dash']['video'][0]['baseUrl']audio_url=json.loads(info)['data']['dash']['audio'][0]['baseUrl']html=etree.HTML(r.text)filename=html.xpath('//h1/text()')[0]# print(filename)return video_url,audio_url,filename
#3.下载并保存视频和音频
def download_files(video_url,audio_url,filename,path):print('开始下载音频和视频...')video_content=requests.get(video_url,headers=headers).contentaudio_content = requests.get(audio_url, headers=headers).contentwith open(f'{path}/{filename}.mp4','wb') as f:f.write(video_content)print('已下载视频部分')with open(f'{path}/{filename}.mp3', 'wb') as f:f.write(audio_content)print('已下载音频部分')#4.合并视频和音频
#ffmpeg
def combine_files(filename,path):cmd=fr"D:\python学习笔记课后题\ffmpeg-7.0.1-full_build\ffmpeg-7.0.1-full_build\bin\ffmpeg -i {path}\{filename}.mp4 -i {path}\{filename}.mp3 -c:v copy -c:a aac -strict experimental {path}\output-{filename}.mp4 -loglevel quiet"os.system(cmd)print('已完成合并！')os.remove(f'{path}\{filename}.mp4')os.remove(f'{path}\{filename}.mp3')print('已删除多余文件！')
if __name__ == '__main__':path = 'D:\python学习笔记课后题\爬虫\实战\视频'url = 'https://www.bilibili.com/video/BV1AA4y1D7h2/?spm_id_from=333.337.search-card.all.click'video_url,audio_url,filename=get_paly_url(url)download_files(video_url, audio_url, filename, path)combine_files(filename, path)