让你在线看视频也能达到多线程下载的速度

[CSM]

Video Funnel - 让你在线看视频也能达到多线程下载的速度

---

马上使用：

1. 从 PyPI 安装：

$ pip(3) install --user video_funnel
# or
$ sudo pip(3) install video_funnel

1. 启动 video_funnel 的服务器：

$ vf http://tulip.ink/test.mp4
======== Running on http://0.0.0.0:8080 ========
(Press CTRL+C to quit)

1. 用 mpv 播放：

$ mpv http://localhost:8080

动机：

众所周知，百度网盘之类产品的视频在线播放非常模糊，下载吧又限速，于是我写了 aiodl 这个下载器，通过 EX-百度云盘 获取的直链来“多线程”下载。可是每次都要下载完才能看又十分不爽，直接用 mpv 之类的播放器播放直链又因为限速的原因根本没法看，遂有了本项目。

实现思路：

1. 先将视频按照一定大小分块。块的大小根据视频的清晰度而异，以下载完一个块后视频可以播放为准。可通过命令行参数 --block-size/-b 来指定，默认为 8MB。
2. 对于上一步中的一个块，再次分块——为区别改叫切片，启动多个协程来下载这些切片，以实现“多线程”提速的目的。块和切片大小一起决定了有多少个连接在同时下载。切片的大小通过 --piece-size/-p 来指定，默认为 1MB。
3. 一个块中的切片全部下载完后，就可以将数据传给播放器了。当播放器播放这一块的时候，回到第 2 步下载下一块数据。为节省内存，设置了在内存中最多存在 2 个下载完而又没有传给播放器的块。

一些细节：

1. 该如何把数据传给播放器呢？我最初的设想是通过标准输出，这样简单好写。但 stdio 是无法 seek 的，这就意味着你只能从视频的开头看起，无法快进 :P 如你所见，现在的解决方案是用 HTTP 协议与播放器传输数据。需要快进的时候播放器发送 HTTP Range 请求，video_funnel 将请求中的范围经过分块、切片后“多线程”下载。但这样就又带来了两个问题：

   1. 需要播放器支持从 URL 播放。mplayer、mpv 之类的命令行播放器大多都支持，但一些 Windows 的播放器就不得而知了 :P 不过可以使用 HTML 的 video 标签在浏览器播放。
   2. 怎么就没有处理 Range 请求的包啊，自己处理很麻烦的好吗～

2. 由于下载的部分是用异步 IO 写的，与播放器交互的服务器部分就不能使用 Flask 之类阻塞的框架了，幸好 aiohttp 居然同时支持客户端和服务端。

3. 说起来简单，实际写起来处处是坑啊 :(

参加 https://www.v2ex.com/t/405569

GitHub: https://github.com/cshuaimin/video-funnel

刚刚把输出调整了以下，用上了进度条，大家快来更新啊 ;-D

$ pip install video_funnel --upgrade

$ vf https://tulip.ink/test.mp4 &
* Listening at port 8080 ...

$ mpv http://localhost:8080 --no-ytdl --quiet
Playing: http://localhost:8080
Block #0:  15%|████▏                        | 600k/4.00M [00:02<03:30, 17.0kB/s]

[nazor]

挺好的，要是能用 js 实现就更好了。

[davy1995]

可以可以，很实用啊感觉

[mingyun]

$ pip install video_funnel
Collecting video_funnel
Could not find a version that satisfies the requirement video_funnel (from ver
sions: )
No matching distribution found for video_funnel

[CSM]

@nazor 对啊，要是 js 实现的就可以直接在浏览器播放了

@mingyun 你是不是没有用官方源？可能是还没有同步过去

[zingl]

youtube 就是这个套路

[swulling]

@mingyun 应该是 pip 版本太老升级下

[diggerdu]

mo 一波 dalao 的 aiodl 真不错

[madfloyd]

大有用处。。。搞个视频网站

[netsail]

前排围观支持！！！

[ryd994]

aria2c -x10 --stream-piece-selector=inorder

[CSM]

@ryd994 唉你看我这轮子造的，早知道有 aira2 这等神器还自己折腾什么。。。

[CSM]

不过 aira2 貌似不能快进？容我加上”边看边下“的功能 :)

[linap]

mark.摩拜大佬

[wzhndd2]

mark.摩拜大佬

[chen2016]

收藏多，回复少，一群大佬准备大干

[honkew]

这个叫做 串流播放

[gabrielsong]

膜拜大佬…

[CSM]

@chen2016 我也很奇怪为什么这么多收藏😂

[zqqian]

mark.摩拜大佬

[wcsjtu]

TS 流怎么搞……

[CSM]

@wcsjtu m3u8 吗？那就没办法了……

[cnaol]

Command "python setup.py egg_info" failed with error code 1 in C:\Users\UrAir\AppData\Local\Temp\pip-build-4koh515g\video-funnel\

怎么破

[CSM]

@cnaol 具体错误是什么呢？需要 Python 版本为 3.6，是不是这个原因？

[cnaol]

@CSM
> PS F:\myproject> pip install --user video_funnel
Collecting video_funnel
Using cached video_funnel-0.0.3.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\UrAir\AppData\Local\Temp\pip-build-v519sou0\video-funnel\setup.py", line 29, in <module>
'vf = video_funnel.__main__:main'
File "c:\users\urair\appdata\local\programs\python\python36\lib\distutils\core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\dist.py", line 315, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\dist.py", line 361, in fetch_build_eggs
replace_conflicting=True,
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\pkg_resources\__init__.py", line 850, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\pkg_resources\__init__.py", line 1122, in best_match
return self.obtain(req, installer)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\pkg_resources\__init__.py", line 1134, in obtain
return installer(requirement)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\dist.py", line 429, in fetch_build_egg
return cmd.easy_install(req)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\command\easy_install.py", line 653, in easy_install
not self.always_copy, self.local_index
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 636, in fetch_distribution
dist = find(requirement)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 617, in find
dist.download_location = self.download(dist.location, tmpdir)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 566, in download
found = self._download_url(scheme.group(1), spec, tmpdir)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 805, in _download_url
return self._attempt_download(url, filename)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 811, in _attempt_download
headers = self._download_to(url, filename)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 710, in _download_to
fp = self.open_url(strip_fragment(url))
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 747, in open_url
return open_with_auth(url, self.opener)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 948, in _socket_timeout
return func(*args, **kwargs)
File "c:\users\urair\appdata\local\programs\python\python36\lib\site-packages\setuptools\package_index.py", line 1067, in open_with_auth
fp = opener(request)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 526, in open
response = self._open(req, data)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 544, in _open
'_open', req)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 504, in _call_chain
result = func(*args)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 1361, in https_open
context=self._context, check_hostname=self._check_hostname)
File "c:\users\urair\appdata\local\programs\python\python36\lib\urllib\request.py", line 1321, in do_open
r = h.getresponse()
File "c:\users\urair\appdata\local\programs\python\python36\lib\http\client.py", line 1331, in getresponse
response.begin()
File "c:\users\urair\appdata\local\programs\python\python36\lib\http\client.py", line 297, in begin
version, status, reason = self._read_status()
File "c:\users\urair\appdata\local\programs\python\python36\lib\http\client.py", line 258, in _read_status
line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
File "c:\users\urair\appdata\local\programs\python\python36\lib\socket.py", line 586, in readinto
return self._sock.recv_into(b)
File "c:\users\urair\appdata\local\programs\python\python36\lib\ssl.py", line 1009, in recv_into
return self.read(nbytes, buffer)
File "c:\users\urair\appdata\local\programs\python\python36\lib\ssl.py", line 871, in read
return self._sslobj.read(len, buffer)
File "c:\users\urair\appdata\local\programs\python\python36\lib\ssl.py", line 631, in read
v = self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\UrAir\AppData\Local\Temp\pip-build-v519sou0\video-funnel\

[CSM]

@cnaol 看最后一行，socket.timeout: The read operation timed out 应该是网络原因，换个 pip 源或挂代理试试

[learningman]

* Listening at port 8080 ...
Error handling request
Traceback (most recent call last):
File "/root/.local/lib/python3.6/site-packages/aiohttp/web_protocol.py", line 418, in start
resp = await task
File "/root/.local/lib/python3.6/site-packages/aiohttp/web_app.py", line 458, in _handle
resp = await handler(request)
File "/root/.local/lib/python3.6/site-packages/video_funnel/__init__.py", line 85, in handler
del request.headers['Host']
TypeError: 'multidict._multidict.CIMultiDictProxy' object does not support item deletion
貌似库改了

[vcheckzen]

windows 下安装了找不到 vf 命令

[gIrl1990]

@ryd994 --stream-piece-selector= inorder 和 geom 有什么区别？