EXTINF |
#EXTINF:,[]</code></td>
<td>表示其后 URL 指定的媒体片段时长（单位为秒），<code>duration</code>可以为十进制的整型或者浮点型，其值必须小于或等于<code>EXT-X-TARGETDURATION</code>指定的值</td>
</tr>
<tr>
<td><code>EXT-X-ENDLIST</code></td>
<td><code>#EXT-X-ENDLIST</code></td>
<td>表明m3u8文件的结束</td>
</tr>
</tbody>
</table>
<blockquote>
<p> 简书：m3u8 文件格式详解 作者：Whyn</p>
</blockquote>
<p>2. 第三方库----m3u8</p>
<blockquote>
<p> <code>m3u8</code>是一个专门用于解析m3u8文件的解析器，有关库的详细操作请参阅<a target="_blank" href="https://pypi.org/project/m3u8/" rel="external nofollow">官方示例</a></p>
</blockquote>
<pre class="codehilite"><code class="language-python"># 安装m3u8
pip install m3u8</code></pre>
<pre class="codehilite"><code class="language-python"># 加载m3u8文件
import m3u8
# 返回一个M3U8对象
playlist = m3u8.load(uri='http://videoserver.com/playlist.m3u8')# url
# playlist = m3u8.load(uri='playlist.m3u8')# file
print(playlist.segments)# 打印EXT-X-KEY标签和所有的EXTINF标签:
print(playlist.target_duration)# 打印EXT-X-TARGETDURATION标签的值
for key in playlist.keys:
if key:
# 如果视频文件加密，可以查看加密参数
print(key.uri, key.method, key.iv)</code></pre>
<p class="maodian"><a name="_label2"></a></p><h2>3. 合成mp4文件</h2>
<p ><mip-img popup alt="在这里插入图片描述" src="https://img.94e.cn/media/uploads/full/20210720/20210514104902155.png"></mip-img></p>
<p> 本次就以这个视频为例，流程如下：<br>
<code>1.</code> 找到视频对应的<code>.m3u8</code>文件<br>
<code>2.</code> 解析<code>.m3u8</code>文件，从中提取<code>.ts</code>视频的url<br>
<code>3.</code> 下载<code>.ts</code>格式的视频<br>
<code>4.</code> 解密<code>.ts</code>格式的视频（如果视频流没有加密，则该步不是必须的）<br>
<code>5.</code> 合成<code>.mp4</code>或其他格式的视频</p>
<pre class="codehilite"><code class="language-python"># 第1步，我载了m3u8文件，也可以直接使用m3u8文件对应的url
playlist = m3u8.load(uri='./data/index.m3u8')
# 第2步，提取URL
for seg in playlist.segments:
print(seg.uri)
# 第3步，下载ts视频
with open('xxxxx.ts', 'wb') as f:
ts = get_ts(url)
f.write(ts)
# 第4步，解密
cipher_text = pad(data_to_pad=cipher_text, block_size=AES.block_size)
aes = AES.new(key=key, mode=AES.MODE_CBC, iv=iv)
cipher_text = aes.decrypt(cipher_text)
# 第5步，合成
files = glob.glob(os.path.join('./video', '*.ts'))
for file in files:
with open(file, 'rb') as fr, open('./video_de/baitoushan.mp4', 'ab') as fw:
content = fr.read()
fw.write(content )</code></pre>
<p class="maodian"><a name="_label3"></a></p><h2>4. 完整代码</h2>
<pre class="codehilite"><code class="language-python"># -*- coding: utf-8 -*-
# @Time : 2021/5/10 20:11
# @Author : XiaYouRan
# @Email : youran.xia@foxmail.com
# @File : video.py
# @Software: PyCharm
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad
from concurrent.futures import ThreadPoolExecutor
import requests
import m3u8
import glob
import os
import time
import logging
logging.getLogger("urllib3").setLevel(logging.WARNING)
def AESDecrypt(cipher_text, key, iv):
cipher_text = pad(data_to_pad=cipher_text, block_size=AES.block_size)
aes = AES.new(key=key, mode=AES.MODE_CBC, iv=iv)
cipher_text = aes.decrypt(cipher_text)
# clear_text = unpad(padded_data=cipher_text, block_size=AES.block_size)
return cipher_text
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) '
'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'}
def get_ts(url):
try:
response = requests.get(url, verify=False)
response.raise_for_status()
response.encoding = 'utf-8'
return response.content
except Exception as err:
print(err)
return b''
def save_ts(url, index):
filename = os.path.join('./video', str(index).zfill(5) + '.ts')
with open(filename, 'wb') as f:
ts = get_ts(url)
f.write(ts)
print(filename + ' is ok!')
if __name__ == '__main__':
playlist = m3u8.load(uri='./data/index.m3u8')
# 线程池，引入index可以防止合成时视频发生乱序
with ThreadPoolExecutor(max_workers=10) as pool:
for index, seg in enumerate(playlist.segments):
pool.submit(save_ts, seg.uri, index)
key = get_ts(playlist.keys[-1].uri)
files = glob.glob(os.path.join('./video', '*.ts'))
for file in files:
with open(file, 'rb') as fr, open('./video_de/baitoushan.mp4', 'ab') as fw:
content = fr.read()
encontent = AESDecrypt(content, key=key, iv=key)
fw.write(encontent)
print(file + ' is ok!')</code></pre>
<p> 下载<code>.ts</code>文件效果如下：</p>
<p ><mip-img popup alt="在这里插入图片描述" src="https://img.94e.cn/media/uploads/full/20210720/20210514104903156.png"></mip-img></p>
<p> 合成<code>.mp4</code>文件效果如下：</p>
<p ><mip-img popup alt="在这里插入图片描述" src="https://img.94e.cn/media/uploads/full/20210720/20210514104903157.png"></mip-img></p>
<p ><mip-img popup alt="在这里插入图片描述" src="https://img.94e.cn/media/uploads/full/20210720/20210514104903158.gif"></mip-img></p>
<p class="maodian"><a name="_label4"></a></p><h2>5. 结束语</h2>
<p>Musicer开源代码仓库</p>
<hr>
<p> <a target="_blank" href="https://github.com/xiayouran/Musicer" rel="external nofollow">Musicer</a>音乐爬虫已经开源了哦，持续更新中，欢迎来踩来Star哦！ヾ(≧∇≦*)ヾ</p>
<p>以上就是Python爬虫之m3u8文件里提取小视频的正确姿势的详细内容，更多关于Python提取m3u8文件小视频的资料请关注python博客其它相关文章！</p></div>
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