基于Python编写一个MP3分割工具

最终效果图

代码

import tkinter as tkfrom tkinter import filedialog, messagebox, ttkimport osimport subprocess class MP3SplitterApp:    def __init__(self, root):        self.root = root        self.root.title("MP3 分割工具")        self.root.geometry("600x400")                # 文件路径变量        self.file_path = tk.StringVar()                # 创建界面元素        self.create_widgets()                # 预设分割时长为 4:30        self.minutes_entry.insert(0, "4")        self.seconds_entry.insert(0, "30")                # 存储分割点的列表        self.split_points = []     def create_widgets(self):        # 文件选择框        file_frame = ttk.Frame(self.root)        file_frame.pack(pady=10, padx=10, fill=tk.X)                ttk.Label(file_frame, text="选择文件：").pack(side=tk.LEFT)        ttk.Entry(file_frame, textvariable=self.file_path, width=50).pack(side=tk.LEFT, padx=5)        ttk.Button(file_frame, text="选择文件", command=self.select_file).pack(side=tk.LEFT)                # 分割时长输入区域        split_frame = ttk.Frame(self.root)        split_frame.pack(pady=10, padx=10, fill=tk.BOTH)                ttk.Label(split_frame, text="设置分割时长（格式：分:秒）：").pack()                input_frame = ttk.Frame(split_frame)        input_frame.pack(pady=5)                self.minutes_entry = ttk.Entry(input_frame, width=5)        self.minutes_entry.pack(side=tk.LEFT)        ttk.Label(input_frame, text=":").pack(side=tk.LEFT)        self.seconds_entry = ttk.Entry(input_frame, width=5)        self.seconds_entry.pack(side=tk.LEFT)                # 控制按钮        button_frame = ttk.Frame(self.root)        button_frame.pack(pady=10, padx=10)                ttk.Button(button_frame, text="MP4转MP3", command=self.convert_mp4_to_mp3).pack(side=tk.LEFT, padx=5)        ttk.Button(button_frame, text="按时长分割", command=self.split_mp3).pack(side=tk.LEFT, padx=5)        ttk.Button(button_frame, text="按歌曲分割", command=self.detect_songs).pack(side=tk.LEFT, padx=5)     def select_file(self):        file_path = filedialog.askopenfilename(filetypes=[("视频/音频文件", "*.mp4 *.mp3")])        if file_path:            self.file_path.set(file_path)     def detect_songs(self):        if not self.file_path.get():            messagebox.showerror("错误", "请选择MP3文件")            return                try:            # 检查FFmpeg路径            possible_paths = [                r"ffmpeg\bin\ffmpeg.exe",                r".\ffmpeg\bin\ffmpeg.exe",                r"C:\ffmpeg\bin\ffmpeg.exe",                "ffmpeg"            ]                        ffmpeg_path = None            for path in possible_paths:                if os.path.exists(path):                    ffmpeg_path = path                    break                            if ffmpeg_path is None:                messagebox.showerror("错误", "找不到FFmpeg，请确保已正确安装FFmpeg")                return                        input_file = self.file_path.get()                        # 使用FFmpeg的silencedetect过滤器检测静音部分            cmd = [                ffmpeg_path, '-i', input_file,                '-af', 'silencedetect=noise=-35dB:d=1',  # 更宽松的参数                '-f', 'null', '-'            ]                        result = subprocess.run(cmd, capture_output=True, encoding='utf-8', errors='ignore')                        # 解析静音检测结果            silence_starts = []            silence_ends = []                        if result.stderr:  # 确保有输出                for line in result.stderr.split('\n'):                    if line:  # 确保行不为空                        if 'silence_start:' in line:                            try:                                parts = line.split('silence_start:')                                if len(parts) > 1:                                    time = float(parts[1].strip().split()[0])                                    silence_starts.append(time)                            except:                                continue                        elif 'silence_end:' in line:                            try:                                parts = line.split('silence_end:')                                if len(parts) > 1:                                    time = float(parts[1].strip().split()[0])                                    silence_ends.append(time)                            except:                                continue                        # 使用检测到的静音点进行分割            if silence_starts and silence_ends:                output_dir = os.path.splitext(input_file)[0] + "_songs"                os.makedirs(output_dir, exist_ok=True)                                # 获取总时长                probe = subprocess.run([                    ffmpeg_path, '-i', input_file                ], capture_output=True, encoding='utf-8', errors='ignore')                                duration = None                if probe.stderr:                    for line in probe.stderr.split('\n'):                        if "Duration:" in line:                            try:                                time_str = line.split("Duration:")[1].split(",")[0].strip()                                h, m, s = map(float, time_str.split(":"))                                duration = h * 3600 + m * 60 + s                                break                            except:                                continue                                if duration is None:                    duration = max(silence_ends[-1] if silence_ends else 0, 3600)                                # 构建分割点列表                split_points = [0]  # 添加开始点                for start, end in zip(silence_starts, silence_ends):                    # 使用静音段的中点作为分割点                    split_point = (start + end) / 2                    # 只有当两个分割点间隔超过20秒时才考虑这是一首新歌                    if split_point - split_points[-1] > 20:                        split_points.append(split_point)                                split_points.append(duration)  # 添加结束点                                # 分割文件                for i in range(len(split_points) - 1):                    start_time = split_points[i]                    end_time = split_points[i + 1]                                        if end_time - start_time < 20:  # 如果片段小于20秒则跳过                        continue                                            output_path = os.path.join(output_dir, f"song_{i+1:03d}.mp3")                                        subprocess.run([                        ffmpeg_path, '-i', input_file,                        '-ss', str(start_time),                        '-t', str(end_time - start_time),                        '-acodec', 'copy',                        '-y',                        output_path                    ], capture_output=True)                                messagebox.showinfo("成功", f"文件已按歌曲分割完成，保存在：{output_dir}")            else:                messagebox.showerror("错误", "未能检测到有效的歌曲分隔点")                    except Exception as e:            messagebox.showerror("错误", f"分割过程中出现错误：{str(e)}")     def convert_mp4_to_mp3(self):        if not self.file_path.get():            messagebox.showerror("错误", "请选择MP4文件")            return                if not self.file_path.get().lower().endswith('.mp4'):            messagebox.showerror("错误", "请选择MP4文件")            return                try:            # 检查FFmpeg路径            possible_paths = [                r"ffmpeg\bin\ffmpeg.exe",                r".\ffmpeg\bin\ffmpeg.exe",                r"C:\ffmpeg\bin\ffmpeg.exe",                "ffmpeg"            ]                        ffmpeg_path = None            for path in possible_paths:                if os.path.exists(path):                    ffmpeg_path = path                    break                            if ffmpeg_path is None:                messagebox.showerror("错误", "找不到FFmpeg，请确保已正确安装FFmpeg")                return                        input_file = self.file_path.get()            output_file = os.path.splitext(input_file)[0] + ".mp3"                        # 显示转换中的消息            messagebox.showinfo("提示", "开始转换，请稍候...")                        # 执行转换            subprocess.run([                ffmpeg_path, '-i', input_file,                '-vn',                '-acodec', 'libmp3lame',                '-q:a', '2',                '-y',                output_file            ], check=True)                        # 更新文件路径为新生成的MP3文件            self.file_path.set(output_file)            messagebox.showinfo("成功", f"MP4已转换为MP3：\n{output_file}")                    except Exception as e:            messagebox.showerror("错误", f"转换过程中出现错误：{str(e)}")     def split_mp3(self):        if not self.file_path.get():            messagebox.showerror("错误", "请选择MP3文件")            return                try:            # 获取用户输入的分割时长            try:                minutes = int(self.minutes_entry.get() or "0")                seconds = int(self.seconds_entry.get() or "0")                if minutes < 0 or seconds < 0 or seconds >= 60:                    raise ValueError                segment_duration = minutes * 60 + seconds                if segment_duration <= 0:                    raise ValueError            except ValueError:                messagebox.showerror("错误", "请输入有效的分割时长")                return                        # 检查FFmpeg路径            possible_paths = [                r"ffmpeg\bin\ffmpeg.exe",                r".\ffmpeg\bin\ffmpeg.exe",                r"C:\ffmpeg\bin\ffmpeg.exe",                "ffmpeg"            ]                        ffmpeg_path = None            for path in possible_paths:                if os.path.exists(path):                    ffmpeg_path = path                    break                        if ffmpeg_path is None:                messagebox.showerror("错误", "找不到FFmpeg，请确保已正确安装FFmpeg")                return                        input_file = self.file_path.get()            output_dir = os.path.splitext(input_file)[0] + "_split"            os.makedirs(output_dir, exist_ok=True)                        # 获取音频总时长            result = subprocess.run([ffmpeg_path, '-i', input_file],                                   capture_output=True,                                   encoding='utf-8',                                  errors='ignore')                        # 从输出中提取持续时间            duration = None            for line in result.stderr.split('\n'):                if "Duration:" in line:                    try:                        time_str = line.split("Duration:")[1].split(",")[0].strip()                        h, m, s = map(float, time_str.split(":"))                        duration = h * 3600 + m * 60 + s                        break                    except:                        continue                        if duration is None:                duration = 3600                messagebox.showwarning("警告", "无法获取音频时长，将使用默认时长进行分割")                        # 计算分割点            num_segments = int(duration // segment_duration) + 1                        # 分割文件            for i in range(num_segments):                start_time = i * segment_duration                end_time = min((i + 1) * segment_duration, duration)                                if end_time - start_time < 1:  # 如果片段小于1秒则跳过                    continue                                    output_path = os.path.join(output_dir, f"segment_{i+1:03d}.mp3")                                subprocess.run([                    ffmpeg_path, '-i', input_file,                    '-ss', str(start_time),                    '-t', str(end_time - start_time),                    '-acodec', 'copy',                    '-y',                    output_path                ], capture_output=True)                        messagebox.showinfo("成功", f"文件已分割完成，保存在：{output_dir}\n共分割成 {num_segments} 个文件")                    except Exception as e:            messagebox.showerror("错误", f"分割过程中出现错误：{str(e)}") if __name__ == "__main__":    root = tk.Tk()    app = MP3SplitterApp(root)    root.mainloop()