如何用python从youtube dl获取信息？？

我正在

tkinter

&

python

中为youtube dl制作

API

，需要知道：

• 如何从youtube dl实时获取信息（速度、完成百分比、文件大小等）

我试过：

import subprocess
def execute(command):
    process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)

    # Poll process for new output until finished
    while True:
        nextline = process.stdout.readline()
        if nextline == '' and process.poll() != None:
            break
        sys.stdout.write(nextline.decode('utf-8'))
        sys.stdout.flush()

    output = process.communicate()[0]
    exitCode = process.returncode

    if (exitCode == 0):
        return output
    else:
        raise ProcessException(command, exitCode, output)

execute("youtube-dl.exe www.youtube.com/watch?v=9bZkp7q19f0 -t")

从

但它必须等到下载完成后才能给我信息；也许有一种方法可以从youtube dl源代码中获取信息

最好避免使用

子流程

；您可以像往常一样直接使用python模块；请参阅： 这需要下载源代码，而不仅仅是将应用程序安装到系统中

继续使用

子流程

；应添加以下参数：

详细/模拟选项：

为您的代码；我认为返回行中有错误，您选择返回通信返回的

系统输出的最后一行

；我建议使用这个未经测试的简单示例：

def执行（命令）：

我在以下方面使用过：

for i in execute("sudo apt-get update"):
    print i 

---

在任何情况下，都不要预先更新您的版本。

尝试以下方法：

from youtube_dl import YoutubeDL
video = "http://www.youtube.com/watch?v=BaW_jenozKc"
with YoutubeDL(youtube_dl_opts) as ydl:
      info_dict = ydl.extract_info(video, download=False)
      video_url = info_dict.get("url", None)
      video_id = info_dict.get("id", None)
      video_title = info_dict.get('title', None)

---

你现在可能已经知道了，但它可能会帮助其他人。

我知道这是一个老问题，但youtube dl有一些钩子，你可以很容易地实时提取这些信息

文件：

progress_hooks:    A list of functions that get called on download
                       progress, with a dictionary with the entries
                       * status: One of "downloading", "error", or "finished".
                                 Check this first and ignore unknown values.
                       If status is one of "downloading", or "finished", the
                       following properties may also be present:
                       * filename: The final filename (always present)
                       * tmpfilename: The filename we're currently writing to
                       * downloaded_bytes: Bytes on disk
                       * total_bytes: Size of the whole file, None if unknown
                       * total_bytes_estimate: Guess of the eventual file size,
                                               None if unavailable.
                       * elapsed: The number of seconds since download started.
                       * eta: The estimated time in seconds, None if unknown
                       * speed: The download speed in bytes/second, None if
                                unknown
                       * fragment_index: The counter of the currently
                                         downloaded video fragment.
                       * fragment_count: The number of fragments (= individual
                                         files that will be merged)
                       Progress hooks are guaranteed to be called at least once
                       (with status "finished") if the download is successful.

如何使用它：

def下载功能（url）：
ydl_选项={
...
“进度挂钩”：[可调用挂钩]，
...
}
使用youtube_dl.YoutubeDL（ydl_选项）作为ydl:
下载（[url]）
def可调用挂钩（响应）：
如果响应[“状态”]=“下载”：
速度=响应[“速度”]
下载百分比=（响应[“下载的字节数”]*100）/响应[“总字节数”]
...

你能用一个可运行的代码更新你的帖子吗？@Payam30已经有一段时间了，但我认为这段代码可以编译（至少在2015年是这样）。不过我看到有一个导入语句缺失了。我的意思是速度、下载百分比等可以是：video_url=info_dict['requested_formats'][0]['url']audio_url=info_dict['requested_formats'][1]['url']@Payam30只需将youtube_dl_opts={}定义为空字典即可。

from youtube_dl import YoutubeDL
video = "http://www.youtube.com/watch?v=BaW_jenozKc"
with YoutubeDL(youtube_dl_opts) as ydl:
      info_dict = ydl.extract_info(video, download=False)
      video_url = info_dict.get("url", None)
      video_id = info_dict.get("id", None)
      video_title = info_dict.get('title', None)

progress_hooks:    A list of functions that get called on download
                       progress, with a dictionary with the entries
                       * status: One of "downloading", "error", or "finished".
                                 Check this first and ignore unknown values.
                       If status is one of "downloading", or "finished", the
                       following properties may also be present:
                       * filename: The final filename (always present)
                       * tmpfilename: The filename we're currently writing to
                       * downloaded_bytes: Bytes on disk
                       * total_bytes: Size of the whole file, None if unknown
                       * total_bytes_estimate: Guess of the eventual file size,
                                               None if unavailable.
                       * elapsed: The number of seconds since download started.
                       * eta: The estimated time in seconds, None if unknown
                       * speed: The download speed in bytes/second, None if
                                unknown
                       * fragment_index: The counter of the currently
                                         downloaded video fragment.
                       * fragment_count: The number of fragments (= individual
                                         files that will be merged)
                       Progress hooks are guaranteed to be called at least once
                       (with status "finished") if the download is successful.