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python实现音视频下载器

article 2026/1/18 12:51:05

一、环境准备

确保当前系统已安装了wxPython 、 yt-dlp 和FFmpeg。当前主要支持下载youtube音视频

1、安装wxPython

pip install wxPython

2、安装yt-dp

pip install wxPython yt-dlp

3、安装FFmpeg

在Windows 10上通过命令行安装FFmpeg，最简便的方式是使用包管理器，比如Scoop或Chocolatey。以下是使用这两种工具的步骤：

① 使用Scoop安装FFmpeg

如果还没有安装Scoop，首先需要按照Scoop官网上的说明进行安装。打开PowerShell并运行以下命令来安装Scoop（如果尚未安装）：

Set-ExecutionPolicy RemoteSigned -scope CurrentUser
irm get.scoop.sh | iex

安装完Scoop后，你可以通过以下命令安装FFmpeg：

scoop install ffmpeg

② 使用Chocolatey安装FFmpeg

如果更倾向于使用Chocolatey，首先确保已经安装了Chocolatey。可以通过Chocolatey官网获取安装指南。
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通常，可以在管理员模式下的PowerShell中运行以下命令来安装Chocolatey：

Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))

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安装完Chocolatey后，可以通过以下命令安装FFmpeg：

choco install ffmpeg

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无论你选择哪种方式安装FFmpeg，完成后都可以通过命令行输入以下命令来验证是否安装成功：

ffmpeg -version

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如果你看到FFmpeg的版本信息以及其他相关细节，那么说明FFmpeg已经正确安装，并且可以通过命令行使用了。

请注意，为了使这些命令在任何目录下都能生效，可能需要重启计算机或者重新打开一个新的命令提示符窗口。此外，确保你的环境变量Path包含了FFmpeg的安装路径，这样系统才能识别ffmpeg命令。通过上述方法安装时，通常会自动处理好这个问题。

二、代码编写

编写名字为downloader.py的python代码文件

import wx
import yt_dlp
import threadingclass DownloaderFrame(wx.Frame):def __init__(self):super().__init__(None, title="Downloader", size=(400, 350))self.panel = wx.Panel(self)self.source_label = wx.StaticText(self.panel, label="Audio or video URL:")self.source_text = wx.TextCtrl(self.panel)self.source_label.SetBackgroundColour(wx.Colour(173, 216, 230))  # 设置背景为浅蓝色self.source_label.SetForegroundColour(wx.Colour(0, 0, 128))  # 设置文本颜色为黑色，确保对比度良好self.folder_label = wx.StaticText(self.panel, label="Save Folder:")self.folder_text = wx.TextCtrl(self.panel)self.folder_label.SetBackgroundColour(wx.Colour(173, 216, 230))  # 设置背景为浅蓝色self.folder_label.SetForegroundColour(wx.Colour(0, 0, 128))  # 设置文本颜色为黑色，确保对比度良好self.folder_button = wx.Button(self.panel, label="Browse...")self.folder_button.Bind(wx.EVT_BUTTON, self.browse_folder)self.quality_label = wx.StaticText(self.panel, label="Quality:")self.quality_choice = wx.ComboBox(self.panel, choices=[], style=wx.CB_READONLY)self.quality_label.SetBackgroundColour(wx.Colour(173, 216, 230))  # 设置背景为浅蓝色self.quality_label.SetForegroundColour(wx.Colour(0, 0, 128))  # 设置文本颜色为黑色，确保对比度良好self.start_button = wx.Button(self.panel, label="Start Download")self.start_button.Bind(wx.EVT_BUTTON, self.start)self.process_label = wx.StaticText(self.panel, label="Percentage:")self.process_bar = wx.Gauge(self.panel, range=100)self.process_label.SetBackgroundColour(wx.Colour(173, 216, 230))  # 设置背景为浅蓝色self.process_label.SetForegroundColour(wx.Colour(0, 0, 128))  # 设置文本颜色为黑色，确保对比度良好self.sizer = wx.BoxSizer(wx.VERTICAL)self.sizer.Add(self.source_label, 0, wx.ALL, 5)self.sizer.Add(self.source_text, 0, wx.EXPAND | wx.ALL, 5)self.sizer.Add(self.folder_label, 0, wx.ALL, 5)self.sizer.Add(self.folder_text, 0, wx.EXPAND | wx.ALL, 5)self.sizer.Add(self.folder_button, 0, wx.ALL, 5)self.sizer.Add(self.quality_label, 0, wx.ALL, 5)self.sizer.Add(self.quality_choice, 0, wx.EXPAND | wx.ALL, 5)self.sizer.Add(self.start_button, 0, wx.ALL, 5)self.sizer.Add(self.process_label, 0, wx.ALL, 5)self.sizer.Add(self.process_bar, 0, wx.EXPAND | wx.ALL, 5)self.panel.SetSizer(self.sizer)self.Show()def browse_folder(self, event):dlg = wx.DirDialog(self, "Choose a directory", style=wx.DD_DEFAULT_STYLE)if dlg.ShowModal() == wx.ID_OK:self.folder_text.SetValue(dlg.GetPath())dlg.Destroy()def get_video_formats(self, url):with yt_dlp.YoutubeDL({}) as ydl:info_dict = ydl.extract_info(url, download=False)#print(info_dict)  # 添加此行来查看所有可用格式formats = info_dict.get('formats', [])#print("Available formats:", formats)  # 打印所有可用格式以供调试self.quality_choice.Clear()best_format_id = None  # 初始化为Nonehas_1080p = False# 首先尝试找到1080p或更高的视频格式for f in formats:if 'height' in f and 'format_id' in f and f['vcodec'] != 'none' and f['acodec'] != 'none':display_str = f"{f['format_id']} - {f['height']}p"if f['height'] >= 1080:  # 检查是否为1080p或更高if not has_1080p or f['height'] > int(best_format_id.split(" - ")[1][:-1]):best_format_id = display_strhas_1080p = True# 如果没有找到1080p或更高的格式，则选择其他可用的最高分辨率if not has_1080p:for f in formats:if 'height' in f and 'format_id' in f and f['vcodec'] != 'none' and f['acodec'] != 'none':display_str = f"{f['format_id']} - {f['height']}p"if best_format_id is None or ('height' in f and f['height'] > int(best_format_id.split(" - ")[1][:-1])):best_format_id = display_str# 添加所有满足条件的格式到下拉列表中供用户选择for f in formats:if 'height' in f and 'format_id' in f and f['vcodec'] != 'none' and f['acodec'] != 'none':self.quality_choice.Append(f"{f['format_id']} - {f['height']}p")if self.quality_choice.GetCount() > 0:self.quality_choice.SetSelection(0)return best_format_iddef start(self, event):url = self.source_text.GetValue()save_folder = self.folder_text.GetValue()# 获取并填充清晰度选项best_format = self.get_video_formats(url)#print(best_format)if not best_format:  # 如果没有找到任何格式wx.MessageBox("No suitable video format found.", "Error", wx.OK | wx.ICON_ERROR)returndownload_thread = threading.Thread(target=self.download_Audio_or_video, args=(url, save_folder, best_format))download_thread.start()def download_Audio_or_video(self, url, save_folder, best_format):selected_format = self.quality_choice.GetStringSelection()format_id = selected_format.split(" - ")[0] if selected_format else best_format.split(" - ")[0]  # 提取format idoptions = {'outtmpl': f'{save_folder}/%(title)s.%(ext)s',#'format': 'best',  # 使用最佳质量'format': format_id,'progress_hooks': [self.update_progress],}try:with yt_dlp.YoutubeDL(options) as ydl:ydl.download([url])wx.CallAfter(wx.MessageBox, 'Download completed!', 'Info', wx.OK | wx.ICON_INFORMATION)except Exception as e:wx.CallAfter(wx.MessageBox, f'Download error occurred: {str(e)}', 'Error', wx.OK | wx.ICON_ERROR)def update_progress(self, progress ):if 'total_bytes' in progress and 'downloaded_bytes' in progress:percentage = int(progress['downloaded_bytes'] * 100 / progress['total_bytes'])wx.CallAfter(self.process_bar.SetValue, percentage)app = wx.App(False)
frame = DownloaderFrame()
app.MainLoop()

三、代码运行测试

1.命令行运行测试

1.python downloader.py
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三、其他方式

或者直接利用exe下载工具来进行命令行下载
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参考文件：
https://blog.csdn.net/qq_31339083/article/details/132195733
https://blog.csdn.net/winniezhang/article/details/132127382