使用Python下载 Youtube 视频或整个播放列表

先决条件：

• 特金特
• 知乎
• pytube
• Tkinter 中的线程
• YouTube API

Python为开发 GUI（图形用户界面）提供了多种选择。在所有 GUI 方法中，Tkinter 是最常用的方法。这是一个标准的Python接口，附带的Python Tk的GUI工具包。 Python with Tkinter 是创建 GUI 应用程序的最快、最简单的方法。

在本文中，我们将讨论如何使用Python创建一个 GUI 应用程序来下载 YouTube 视频或完整的 YouTube 播放列表。

在我们开始之前，我们将讨论pyyoutube模块。 pyyoutube模块提供了一种使用 YouTube 数据 API V3 的简单方法。

安装：

pip install python-youtube

从 YouTube 播放列表下载选定的视频

在本节中，我们将学习如何使用Python的Tkinter 从 YouTube 播放列表中仅下载选定的视频。

方法：

• 首先，我们将使用pyyoutube模块从 YouTube 播放列表中获取所有视频链接。
• 然后我们将选择我们要下载的视频链接。
• 然后我们将使用pytube模块一一下载每个视频。

下面是 GUI 的样子：

让我们一步一步地理解实现：

• 创建一个 Tkinter 窗口并添加按钮、标签、滚动条等...

Python3

# Import Required Modules
from tkinter import *
  
# Create Object
root = Tk()
  
# Set geometry
root.geometry('400x400')
  
# Add Label
Label(root, text="Youtube Playlist Downloader",
      font="italic 15 bold").pack(pady=10)
Label(root, text="Enter Playlist URL:-", font="italic 10").pack()
  
# Add Entry box
playlistId = Entry(root, width=60)
playlistId.pack(pady=5)
  
# Add Button
get_videos = Button(root, text="Get Videos")
get_videos.pack(pady=10)
  
# Add Scollbar
scrollbar = Scrollbar(root)
scrollbar.pack(side=RIGHT, fill=BOTH)
list_box = Listbox(root, selectmode="multiple")
list_box.pack(expand=YES, fill="both")
list_box.config(yscrollcommand=scrollbar.set)
scrollbar.config(command=list_box.yview)
  
download_start = Button(root, text="Download Start", state=DISABLED)
download_start.pack(pady=10)
  
# Execute Tkinter
root.mainloop()

• 现在我们将创建三个函数：

1. get_list_videos：-它将提供 YouTube 播放列表的所有视频链接的列表。
2. 线程：-用于 Tkinter 中的线程。
3. download_videos:-用于下载 YouTube 视频。

蟒蛇3

def get_list_videos():
    global playlist_item_by_id
    # Clear ListBox
    list_box.delete(0, 'end')
  
    # Create API Object
    api = Api(api_key='Enter API Key')
  
    if "youtube" in playlistId.get():
        playlist_id = playlistId.get()[len(
            "https://www.youtube.com/playlist?list="):]
    else:
        playlist_id = playlistId.get()
  
    # Get list of video links
    playlist_item_by_id = api.get_playlist_items(
        playlist_id=playlist_id, count=None, return_json=True)
  
    # Iterate through all video links and insert into listbox
    for index, videoid in enumerate(playlist_item_by_id['items']):
        list_box.insert(
            END, f" {str(index+1)}. {videoid['contentDetails']['videoId']}")
  
    download_start.config(state=NORMAL)
  
  
def threading():
    # Call download_videos function
    t1 = Thread(target=download_videos)
    t1.start()
  
  
def download_videos():
    download_start.config(state="disabled")
    get_videos.config(state="disabled")
  
    # Iterate through all selected videos
    for i in list_box.curselection():
        videoid = playlist_item_by_id['items'][i]['contentDetails']['videoId']
  
        link = f"https://www.youtube.com/watch?v={videoid}"
  
        yt_obj = YouTube(link)
  
        filters = yt_obj.streams.filter(progressive=True, file_extension='mp4')
  
        # download the highest quality video
        filters.get_highest_resolution().download()
  
    messagebox.showinfo("Success", "Video Successfully downloaded")
    download_start.config(state="normal")
    get_videos.config(state="normal")

下面是完整的实现：

蟒蛇3

# Import Required Modules
from tkinter import *
from pyyoutube import Api
from pytube import YouTube
from threading import Thread
from tkinter import messagebox
  
  
def get_list_videos():
    global playlist_item_by_id
    # Clear ListBox
    list_box.delete(0, 'end')
  
    # Create API Object
    api = Api(api_key='Enter API Key')
  
    if "youtube" in playlistId.get():
        playlist_id = playlistId.get()[len(
            "https://www.youtube.com/playlist?list="):]
    else:
        playlist_id = playlistId.get()
  
    # Get list of video links
    playlist_item_by_id = api.get_playlist_items(
        playlist_id=playlist_id, count=None, return_json=True)
  
    # Iterate through all video links and insert into listbox
    for index, videoid in enumerate(playlist_item_by_id['items']):
        list_box.insert(
            END, f" {str(index+1)}. {videoid['contentDetails']['videoId']}")
  
    download_start.config(state=NORMAL)
  
  
def threading():
    # Call download_videos function
    t1 = Thread(target=download_videos)
    t1.start()
  
  
def download_videos():
    download_start.config(state="disabled")
    get_videos.config(state="disabled")
  
    # Iterate through all selected videos
    for i in list_box.curselection():
        videoid = playlist_item_by_id['items'][i]['contentDetails']['videoId']
  
        link = f"https://www.youtube.com/watch?v={videoid}"
  
        yt_obj = YouTube(link)
  
        filters = yt_obj.streams.filter(progressive=True, file_extension='mp4')
  
        # download the highest quality video
        filters.get_highest_resolution().download()
  
    messagebox.showinfo("Success", "Video Successfully downloaded")
    download_start.config(state="normal")
    get_videos.config(state="normal")
  
  
# Create Object
root = Tk()
# Set geometry
root.geometry('400x400')
  
# Add Label
Label(root, text="Youtube Playlist Downloader",
      font="italic 15 bold").pack(pady=10)
Label(root, text="Enter Playlist URL:-", font="italic 10").pack()
  
# Add Entry box
playlistId = Entry(root, width=60)
playlistId.pack(pady=5)
  
# Add Button
get_videos = Button(root, text="Get Videos", command=get_list_videos)
get_videos.pack(pady=10)
  
# Add Scollbar
scrollbar = Scrollbar(root)
scrollbar.pack(side=RIGHT, fill=BOTH)
list_box = Listbox(root, selectmode="multiple")
list_box.pack(expand=YES, fill="both")
list_box.config(yscrollcommand=scrollbar.set)
scrollbar.config(command=list_box.yview)
  
download_start = Button(root, text="Download Start",
                        command=threading, state=DISABLED)
download_start.pack(pady=10)
  
# Execute Tkinter
root.mainloop()

输出：

下载完整的 YouTube 播放列表

在这里，我们将学习如何使用Python在 Tkinter 中下载完整的 YouTube 播放列表。

方法：

• 首先，我们将使用pyyoutube模块从 YouTube 播放列表中获取所有视频链接。
• 然后我们将遍历所有视频并使用pytube模块一个一个下载每个视频。

下面是 GUI 的样子：

让我们一步一步地理解实现：

• 创建一个 Tkinter 窗口并添加按钮、标签等...

蟒蛇3

# Import Required Modules
from tkinter import *
  
# Create Object
root = Tk()
  
# Set geometry
root.geometry('400x200')
  
# Add Label
Label(root, text="Youtube Playlist Downloader",
      font="italic 15 bold").pack(pady=10)
Label(root, text="Enter Playlist URL:-", font="italic 10").pack()
  
# Add Entry box
playlistId = Entry(root, width=60)
playlistId.pack(pady=5)
  
download_start = Button(root, text="Download Start")
download_start.pack(pady=10)
  
# Execute Tkinter
root.mainloop()

• 现在我们将创建两个函数：

1. 线程：-用于 Tkinter 中的线程。
2. download_videos:-用于下载 YouTube 视频。

蟒蛇3

def threading():
    # Call download_videos function
    t1 = Thread(target=download_videos)
    t1.start()
  
  
def download_videos():
    # Create API Object
    api = Api(api_key='Enter API Key')
  
    if "youtube" in playlistId.get():
        playlist_id = playlistId.get()[len(
            "https://www.youtube.com/playlist?list="):]
    else:
        playlist_id = playlistId.get()
  
    # Get list of video links
    playlist_item_by_id = api.get_playlist_items(
        playlist_id=playlist_id, count=None, return_json=True)
  
    # Iterate through all video links
    for index, videoid in enumerate(playlist_item_by_id['items']):
  
        link = f"https://www.youtube.com/watch?v={videoid['contentDetails']['videoId']}"
  
        yt_obj = YouTube(link)
  
        filters = yt_obj.streams.filter(progressive=True, file_extension='mp4')
  
        # download the highest quality video
        filters.get_highest_resolution().download()
  
        print(f"Downloaded:- {link}")
  
    messagebox.showinfo("Success", "Video Successfully downloaded")

下面是完整的实现：

蟒蛇3

# Import Required Modules
from tkinter import *
from pyyoutube import Api
from pytube import YouTube
from threading import Thread
from tkinter import messagebox
  
  
def threading():
    # Call download_videos function
    t1 = Thread(target=download_videos)
    t1.start()
  
  
def download_videos():
    # Create API Object
    api = Api(api_key='Enter API Key')
  
    if "youtube" in playlistId.get():
        playlist_id = playlistId.get()[len(
            "https://www.youtube.com/playlist?list="):]
    else:
        playlist_id = playlistId.get()
  
    # Get list of video links
    playlist_item_by_id = api.get_playlist_items(
        playlist_id=playlist_id, count=None, return_json=True)
  
    # Iterate through all video links
    for index, videoid in enumerate(playlist_item_by_id['items']):
  
        link = f"https://www.youtube.com/watch?v={videoid['contentDetails']['videoId']}"
  
        yt_obj = YouTube(link)
  
        filters = yt_obj.streams.filter(progressive=True, file_extension='mp4')
  
        # download the highest quality video
        filters.get_highest_resolution().download()
  
        print(f"Downloaded:- {link}")
  
    messagebox.showinfo("Success", "Video Successfully downloaded")
  
  
# Create Object
root = Tk()
# Set geometry
root.geometry('400x200')
  
# Add Label
Label(root, text="Youtube Playlist Downloader",
      font="italic 15 bold").pack(pady=10)
Label(root, text="Enter Playlist URL:-", font="italic 10").pack()
  
# Add Entry box
playlistId = Entry(root, width=60)
playlistId.pack(pady=5)
  
download_start = Button(root, text="Download Start", command=threading)
download_start.pack(pady=10)
  
# Execute Tkinter
root.mainloop()

输出：