Easily cut MP3 files with Python script and simple GUI

Application scenario:

• Need to cut large MP3 files into smaller parts for uploading or sending.
• A specific audio segment needs to be extracted from an MP3 file for other purposes.
• Need to quickly create ringtones or music clips for devices such as mobile phones.

source code:

import subprocess
import wx

class MyFrame(wx.Frame):
    def __init__(self, parent, title):
        super(MyFrame, self).__init__(parent, title=title, size=(400, 600))
        panel = wx.Panel(self)

        vbox = wx.BoxSizer(wx.VERTICAL)

        hbox1 = wx.BoxSizer(wx.HORIZONTAL)
        start_label = wx.StaticText(panel, label='开始时间（秒）：')
        hbox1.Add(start_label, flag=wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5)
        self.start_input = wx.TextCtrl(panel)
        hbox1.Add(self.start_input, flag=wx.ALL, border=5)
        vbox.Add(hbox1, flag=wx.EXPAND | wx.ALL, border=10)

        hbox2 = wx.BoxSizer(wx.HORIZONTAL)
        end_label = wx.StaticText(panel, label='结束时间（秒）：')
        hbox2.Add(end_label, flag=wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5)
        self.end_input = wx.TextCtrl(panel)
        hbox2.Add(self.end_input, flag=wx.ALL, border=5)
        vbox.Add(hbox2, flag=wx.EXPAND | wx.ALL, border=10)

        hbox3 = wx.BoxSizer(wx.HORIZONTAL)
        btn_browse = wx.Button(panel, label='选择文件', size=(100, 30))
        btn_browse.Bind(wx.EVT_BUTTON, self.on_browse)
        hbox3.Add(btn_browse, flag=wx.ALL, border=5)
        vbox.Add(hbox3, flag=wx.ALIGN_CENTER | wx.ALL, border=10)

        hbox4 = wx.BoxSizer(wx.HORIZONTAL)
        name_label = wx.StaticText(panel, label='歌名：')
        hbox4.Add(name_label, flag=wx.ALIGN_CENTER_VERTICAL | wx.ALL, border=5)
        self.name_input = wx.TextCtrl(panel)
        hbox4.Add(self.name_input, flag=wx.ALL, border=5)
        vbox.Add(hbox4, flag=wx.EXPAND | wx.ALL, border=10)

        hbox5 = wx.BoxSizer(wx.HORIZONTAL)
        btn_cut = wx.Button(panel, label='切割', size=(100, 30))
        btn_cut.Bind(wx.EVT_BUTTON, self.on_cut)
        hbox5.Add(btn_cut, flag=wx.ALL, border=5)
        vbox.Add(hbox5, flag=wx.ALIGN_CENTER | wx.ALL, border=10)

        panel.SetSizer(vbox)
        self.Show()

    def on_browse(self, event):
        dlg = wx.FileDialog(self, "选择MP3文件", wildcard="MP3文件 (*.mp3)|*.mp3", style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST)
        if dlg.ShowModal() == wx.ID_OK:
            selected_file = dlg.GetPath()
            self.input_file = selected_file
        dlg.Destroy()

    def on_cut(self, event):
        start_time = self.start_input.GetValue()
        end_time = self.end_input.GetValue()
        name = self.name_input.GetValue()

        if not start_time or not end_time or not name or not hasattr(self, 'input_file'):
            wx.MessageBox('请输入有效的开始时间、结束时间、歌名，并选择要切割的MP3文件！', '错误', wx.OK | wx.ICON_ERROR)
            return
        output_file = f'{name}.mp3'

        # 使用FFmpeg切割音频文件
        cmd = f'D://ffmpeg//bin//ffmpeg -i {self.input_file} -ss {start_time} -to {end_time} -c copy {output_file}'
        print(cmd)
        try:
            subprocess.call(cmd, shell=True)
            wx.MessageBox('切割成功！', '提示', wx.OK | wx.ICON_INFORMATION)
        except subprocess.CalledProcessError:
            wx.MessageBox('切割失败，请检查输入的时间是否正确！', '错误', wx.OK | wx.ICON_ERROR)

app = wx.App()
MyFrame(None, title='MP3切割工具')
app.MainLoop()

Source code explanation:

The core logic of this tool is to use FFmpeg library for audio processing, and use wxPython library to build GUI. Specifically, the FFmpeg library provides powerful audio processing functions that can easily extract, clip or transcode audio from audio files, while the wxPython library provides easy-to-use GUI elements and layout managers to help users create beautiful and Easy-to-use GUI.

It should be noted that this small tool uses the FFmpeg library, so you need to make sure that the FFmpeg library has been installed and added to the system environment variables before using it. At the same time, this small tool only supports cutting MP3 files. If you need to process other types of audio files, you need to make corresponding modifications.

The effect is as follows:

Users can follow the steps below to use this gadget:

1. Run the code and open the GUI interface.
2. Select the MP3 file you want to cut by clicking the "Select File" button.
3. Enter the start time and end time, and the name of the file to be exported.
4. Click the "Cut" button and wait for the program to finish processing.
5. Find the cut MP3 files in the output folder.