03-06-10--Python爬取哔哩哔哩学习视频

下载任意哔哩哔哩视频

一 寻找任意一个视频地址

例如这个：

拿出窗口中的链接：https://www.bilibili.com/video/av76609390，修改源代码中的url即可完成下载

#由于哔哩哔哩视频音频是分开的，所以下来下来的视频是两个，一个音频，一个视频，要视频和音频合成，可看另一偏博客

二 分析页面

这个地址加载后会有该视频的视频信息和清晰度等信息，我们只需要取出视频和音频的地址，直接下载即可，

下面这两个地址就是一个视频，一个音频，分片下载的

我们用requests模块模拟即可，打开文件不停的发送请求加载数据写入即可

def download_video(old_video_url, video_url, audio_url, video_name):
    headers.update({"Referer": old_video_url})
    print("开始下载视频：%s" % video_name)
    video_content = requests.get(video_url, headers=headers)
    print('%s视频大小：' % video_name, video_content.headers['content-length'])
    audio_content = requests.get(audio_url, headers=headers)
    print('%s音频大小：' % video_name, audio_content.headers['content-length'])
    # 下载视频开始
    received_video = 0
    with open('%s_video.mp4' % video_name, 'ab') as output:
        while int(video_content.headers['content-length']) > received_video:
            headers['Range'] = 'bytes=' + str(received_video) + '-'
            response = requests.get(video_url, headers=headers)
            output.write(response.content)
            received_video += len(response.content)
    # 下载视频结束
    # 下载音频开始
    audio_content = requests.get(audio_url, headers=headers)
    received_audio = 0
    with open('%s_audio.mp4' % video_name, 'ab') as output:
        while int(audio_content.headers['content-length']) > received_audio:
            # 视频分片下载
            headers['Range'] = 'bytes=' + str(received_audio) + '-'
            response = requests.get(audio_url, headers=headers)
            output.write(response.content)
            received_audio += len(response.content)
    # 下载音频结束
    return video_name

三 全部代码

'''

通过该程序下载的视频和音频是分成连个文件的，没有合成，
视频为：视频名_video.mp4
音频为：视频名_audio.mp4
修改url的值，换成自己想下载的页面节课
'''

# 导入requests模块，模拟发送请求
import requests
# 导入json
import json
# 导入re
import re

# 定义请求头
headers = {
    'Accept': '*/*',
    'Accept-Language': 'en-US,en;q=0.5',
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36'
}


# 正则表达式，根据条件匹配出值
def my_match(text, pattern):
    match = re.search(pattern, text)
    print(match.group(1))
    print()
    return json.loads(match.group(1))


def download_video(old_video_url, video_url, audio_url, video_name):
    headers.update({"Referer": old_video_url})
    print("开始下载视频：%s" % video_name)
    video_content = requests.get(video_url, headers=headers)
    print('%s视频大小：' % video_name, video_content.headers['content-length'])
    audio_content = requests.get(audio_url, headers=headers)
    print('%s音频大小：' % video_name, audio_content.headers['content-length'])
    # 下载视频开始
    received_video = 0
    with open('%s_video.mp4' % video_name, 'ab') as output:
        while int(video_content.headers['content-length']) > received_video:
            headers['Range'] = 'bytes=' + str(received_video) + '-'
            response = requests.get(video_url, headers=headers)
            output.write(response.content)
            received_video += len(response.content)
    # 下载视频结束
    # 下载音频开始
    audio_content = requests.get(audio_url, headers=headers)
    received_audio = 0
    with open('%s_audio.mp4' % video_name, 'ab') as output:
        while int(audio_content.headers['content-length']) > received_audio:
            # 视频分片下载
            headers['Range'] = 'bytes=' + str(received_audio) + '-'
            response = requests.get(audio_url, headers=headers)
            output.write(response.content)
            received_audio += len(response.content)
    # 下载音频结束
    return video_name


if __name__ == '__main__':
    # 换成你要爬取的视频地址
    url = 'https://www.bilibili.com/video/av76609390'
    # 发送请求，拿回数据
    res = requests.get(url, headers=headers)
    # 视频详情json
    playinfo = my_match(res.text, '__playinfo__=(.*?)</script><script>')
    # 视频内容json
    initial_state = my_match(res.text, r'__INITIAL_STATE__=(.*?);\(function\(\)')
    # 视频分多种格式，直接取分辨率最高的视频 1080p
    video_url = playinfo['data']['dash']['video'][0]['baseUrl']
    # 取出音频地址
    audio_url = playinfo['data']['dash']['audio'][0]['baseUrl']
    video_name = initial_state['videoData']['title']
    print('视频名字为：video_name')
    print('视频地址为：', video_url)
    print('音频地址为：', audio_url)
    download_video(url, video_url, audio_url, video_name)