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srt_ultimate_optimizer_v4.0.py
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408
srt_ultimate_optimizer_v4.0.py
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# filename: srt_ultimate_optimizer_v4.0.py
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import tkinter as tk
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from tkinter import filedialog, ttk, messagebox, scrolledtext
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import sv_ttk
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import re
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from datetime import timedelta
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import os
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import jieba
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import requests
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import json
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import threading
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import queue
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# --- 配置区 ---
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# Ollama 服务地址
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OLLAMA_HOST = "http://127.0.0.1:11434"
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# 语速和结构优化参数
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TARGET_SPEED_STRICT = 4.2 # 黄金语速 (字/秒)，略微调高以适应更自然的语感
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NATURAL_PAUSE_DURATION = 0.4 # 拆分句子间的自然停顿 (秒)
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FAST_SPEED_THRESHOLD = 7.5 # 判定为“过快”的语速阈值
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SPLIT_CHARS_THRESHOLD = 28 # 超过此字数也考虑拆分
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# 借用时间策略的参数
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GAP_BORROW_THRESHOLD = 0.3 # 必须大于此秒数的间隙才能借用
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GAP_SAFE_MARGIN = 0.15 # 借用后至少保留的间隙时长
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# 缝合策略的安全阈值
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MIN_DURATION_THRESHOLD = 0.4
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MIN_CHARS_THRESHOLD = 2
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# --- SRT核心类 和 解析函数 ---
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class SrtEntry:
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def __init__(self, index, start_td, end_td, text):
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self.index = index
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self.start_td = start_td
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self.end_td = end_td
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self.text = text.strip()
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self.optimization_type = "original" # original, compressed, stretched, shortened, split
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@property
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def duration(self): return (self.end_td - self.start_td).total_seconds()
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@property
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def char_count(self): return len(re.sub(r'[\s,.?!。，、？！]', '', self.text))
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@property
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def speed(self):
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count = self.char_count
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return count / self.duration if self.duration > 0 and count > 0 else 0
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@property
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def start_str(self): return self._td_to_str(self.start_td)
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@property
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def end_str(self): return self._td_to_str(self.end_td)
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@staticmethod
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def _td_to_str(td):
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total_seconds = int(td.total_seconds())
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ms = int((td.total_seconds() - total_seconds) * 1000)
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h, m, s = total_seconds // 3600, (total_seconds % 3600) // 60, total_seconds % 60
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return f"{h:02d}:{m:02d}:{s:02d},{ms:03d}"
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def to_srt_block(self): return f"{self.index}\n{self.start_str} --> {self.end_str}\n{self.text}\n\n"
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def parse_srt(content):
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entries = []
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pattern = re.compile(r'(\d+)\n(\d{2}:\d{2}:\d{2},\d{3})\s*-->\s*(\d{2}:\d{2}:\d{2},\d{3})\n([\s\S]*?)(?=\n\n|\Z)', re.MULTILINE)
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def to_td(time_str):
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h, m, s, ms = map(int, re.split('[:,]', time_str))
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return timedelta(hours=h, minutes=m, seconds=s, milliseconds=ms)
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for match in pattern.finditer(content):
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entries.append(SrtEntry(int(match.group(1)), to_td(match.group(2)), to_td(match.group(3)), match.group(4)))
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return entries
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# --- GUI 应用 ---
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class App:
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def __init__(self, root):
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self.root = root
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self.root.title("终极字幕优化器 V4.0 - 融合版")
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self.root.geometry("1300x850")
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self.srt_path = ""
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self.original_entries = []
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self.optimized_entries = []
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self.processing_thread = None
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self.gui_queue = queue.Queue()
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self.is_ollama_available = False
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self.vars = {
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"ollama_model": tk.StringVar(),
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"status": tk.StringVar(value="准备就绪"),
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"use_llm": tk.BooleanVar(value=True)
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}
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self.build_ui()
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sv_ttk.set_theme("dark")
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self.root.after(100, self.process_queue)
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self.root.after(100, self.load_ollama_models)
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def build_ui(self):
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main_pane = ttk.PanedWindow(self.root, orient=tk.HORIZONTAL)
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main_pane.pack(fill=tk.BOTH, expand=True, padx=10, pady=10)
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# --- 左侧控制面板 ---
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control_frame = ttk.Frame(main_pane, width=280)
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main_pane.add(control_frame, weight=0)
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# 1. 文件操作
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file_frame = ttk.Labelframe(control_frame, text="1. 文件操作")
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file_frame.pack(fill=tk.X, pady=(0, 10))
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load_btn = ttk.Button(file_frame, text="加载SRT文件", command=self.load_srt, style="Accent.TButton")
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load_btn.pack(fill=tk.X, padx=5, pady=5)
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self.save_btn = ttk.Button(file_frame, text="另存为...", command=self.save_srt, state="disabled")
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self.save_btn.pack(fill=tk.X, padx=5, pady=(0, 5))
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# 2. Ollama 设置
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ollama_frame = ttk.Labelframe(control_frame, text="2. LLM 设置 (可选)")
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ollama_frame.pack(fill=tk.X, pady=10)
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ttk.Label(ollama_frame, text="Ollama模型:").pack(fill=tk.X, padx=5, pady=(5,0))
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self.model_combo = ttk.Combobox(ollama_frame, textvariable=self.vars['ollama_model'], state="readonly")
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self.model_combo.pack(fill=tk.X, padx=5, pady=5)
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llm_check = ttk.Checkbutton(ollama_frame, text="启用LLM进行文本缩减", variable=self.vars['use_llm'])
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llm_check.pack(fill=tk.X, padx=5, pady=(0, 5))
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# 3. 开始优化
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self.optimize_btn = ttk.Button(control_frame, text="开始优化", command=self.run_optimization, state="disabled")
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self.optimize_btn.pack(fill=tk.X, pady=10)
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# 4. 日志输出
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log_frame = ttk.Labelframe(control_frame, text="处理日志")
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log_frame.pack(fill=tk.BOTH, expand=True, pady=10)
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self.log_text = scrolledtext.ScrolledText(log_frame, wrap=tk.WORD, state="disabled", height=10)
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self.log_text.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)
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# --- 右侧表格对比区 ---
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table_container = ttk.Frame(main_pane)
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main_pane.add(table_container, weight=1)
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# 状态栏
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status_bar = ttk.Frame(table_container)
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status_bar.pack(side=tk.BOTTOM, fill=tk.X, pady=(5, 0))
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self.progress_bar = ttk.Progressbar(status_bar, orient=tk.HORIZONTAL, mode='determinate')
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self.progress_bar.pack(side=tk.LEFT, fill=tk.X, expand=True, padx=(0, 10))
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ttk.Label(status_bar, textvariable=self.vars['status']).pack(side=tk.LEFT)
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# 表格
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table_pane = ttk.PanedWindow(table_container, orient=tk.VERTICAL)
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table_pane.pack(fill=tk.BOTH, expand=True)
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left_frame = ttk.Labelframe(table_pane, text="原始字幕")
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table_pane.add(left_frame, weight=1)
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right_frame = ttk.Labelframe(table_pane, text="优化后 (蓝:借时 橙:缩减 绿:压缩/拆分)")
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table_pane.add(right_frame, weight=1)
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self.tree_orig = self.create_treeview(left_frame)
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self.tree_optim = self.create_treeview(right_frame)
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self.tree_optim.tag_configure("compressed", background="#2a5a2a")
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self.tree_optim.tag_configure("split", background="#3a6b3a")
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self.tree_optim.tag_configure("stretched", background="#2a4a7a")
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self.tree_optim.tag_configure("shortened", background="#7a5a2a")
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def create_treeview(self, parent):
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cols = ("#0", "开始", "结束", "时长", "字数", "语速", "文本")
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tree = ttk.Treeview(parent, columns=cols[1:], show="headings")
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for col in cols: tree.heading(col, text=col, anchor="w")
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tree.column("#0", width=40, anchor="center"); tree.column("开始", width=90, anchor="w"); tree.column("结束", width=90, anchor="w")
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tree.column("时长", width=50, anchor="e"); tree.column("字数", width=40, anchor="e")
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tree.column("语速", width=50, anchor="e"); tree.column("文本", width=400, anchor="w")
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vsb = ttk.Scrollbar(parent, orient="vertical", command=tree.yview)
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tree.configure(yscrollcommand=vsb.set); tree.pack(side=tk.LEFT, fill=tk.BOTH, expand=True); vsb.pack(side=tk.RIGHT, fill=tk.Y)
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return tree
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# --- GUI 事件处理 ---
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def load_srt(self):
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path = filedialog.askopenfilename(filetypes=[("SRT Subtitles", "*.srt")])
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if not path: return
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self.srt_path = path
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try:
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with open(path, 'r', encoding='utf-8-sig') as f: content = f.read()
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self.original_entries = parse_srt(content)
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self.populate_tree(self.tree_orig, self.original_entries)
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self.tree_optim.delete(*self.tree_optim.get_children())
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self.log_message(f"已加载: {os.path.basename(path)} ({len(self.original_entries)} 条)")
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self.optimize_btn.config(state="normal")
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self.save_btn.config(state="disabled")
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except Exception as e: messagebox.showerror("加载失败", f"无法加载或解析文件: {e}")
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def save_srt(self):
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if not self.optimized_entries: return
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original_basename = os.path.splitext(os.path.basename(self.srt_path))[0]
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save_path = filedialog.asksaveasfilename(defaultextension=".srt", initialfile=f"{original_basename}_ultimate.srt", filetypes=[("SRT Subtitles", "*.srt")])
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if not save_path: return
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try:
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with open(save_path, 'w', encoding='utf-8') as f:
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for entry in self.optimized_entries: f.write(entry.to_srt_block())
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messagebox.showinfo("保存成功", f"优化后的SRT文件已保存至:\n{save_path}")
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except Exception as e: messagebox.showerror("保存失败", f"无法保存文件: {e}")
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def populate_tree(self, tree, entries):
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tree.delete(*tree.get_children())
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for entry in entries:
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values = (entry.start_str, entry.end_str, f"{entry.duration:.2f}s", entry.char_count, f"{entry.speed:.2f}", entry.text)
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tags = (entry.optimization_type,) if entry.optimization_type != "original" else ()
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tree.insert("", "end", text=str(entry.index), values=values, tags=tags)
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# --- 线程与队列 ---
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def run_optimization(self):
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if not self.original_entries: return
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if self.vars['use_llm'].get() and not self.is_ollama_available:
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messagebox.showerror("错误", "已勾选启用LLM，但Ollama服务未连接。")
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return
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self.optimize_btn.config(state="disabled")
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self.save_btn.config(state="disabled")
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self.log_text.config(state="normal"); self.log_text.delete(1.0, tk.END); self.log_text.config(state="disabled")
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self.progress_bar['value'] = 0
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self.progress_bar['maximum'] = len(self.original_entries)
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self.processing_thread = threading.Thread(
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target=self.optimization_worker,
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args=(list(self.original_entries), self.vars['ollama_model'].get(), self.vars['use_llm'].get()),
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daemon=True
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)
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self.processing_thread.start()
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def process_queue(self):
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try:
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while True:
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msg = self.gui_queue.get_nowait()
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msg_type, data = msg.get("type"), msg.get("data")
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if msg_type == "log":
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self.log_text.config(state="normal")
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self.log_text.insert(tk.END, data + "\n"); self.log_text.see(tk.END)
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self.log_text.config(state="disabled")
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elif msg_type == "error":
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self.log_message(f"错误: {data}")
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messagebox.showerror("Ollama 错误", data)
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elif msg_type == "models_loaded":
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if data:
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self.model_combo['values'] = data; self.model_combo.set(data[0])
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self.log_message(f"Ollama连接成功, 检测到模型: {', '.join(data)}")
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self.is_ollama_available = True
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else: self.log_message("Ollama连接成功, 但未检测到模型。")
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elif msg_type == "progress":
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self.progress_bar['value'] = data['current']
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self.vars['status'].set(f"处理中... {data['current']}/{data['total']}")
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elif msg_type == "finish":
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self.optimized_entries = data
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self.populate_tree(self.tree_optim, self.optimized_entries)
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self.optimize_btn.config(state="normal"); self.save_btn.config(state="normal")
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self.vars['status'].set("优化完成！")
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self.log_message("\n--- 所有字幕优化完成！---")
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messagebox.showinfo("完成", f"优化完成！\n原 {len(self.original_entries)} 句 -> 新 {len(self.optimized_entries)} 句")
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except queue.Empty: pass
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finally: self.root.after(100, self.process_queue)
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def log_message(self, msg): self.gui_queue.put({"type": "log", "data": msg})
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# --- Ollama API 通信 ---
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def load_ollama_models(self):
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self.log_message("正在连接Ollama...")
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def _load():
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try:
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response = requests.get(f"{OLLAMA_HOST}/api/tags", timeout=5)
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response.raise_for_status()
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models_data = response.json()['models']
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model_names = [m['name'] for m in models_data]
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self.gui_queue.put({"type": "models_loaded", "data": model_names})
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except requests.exceptions.RequestException as e:
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self.gui_queue.put({"type": "log", "data": f"Ollama连接失败: {e}\n(LLM功能将不可用)"})
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except Exception as e:
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self.gui_queue.put({"type": "error", "data": f"解析Ollama模型列表时出错: {e}"})
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threading.Thread(target=_load, daemon=True).start()
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def _call_llm_for_shorten(self, text_to_shorten, model_name):
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prompt = f"""你是一个专业的视频字幕精炼师。任务是将给定的字幕文本缩短，以适配过短的时间轴，同时保持核心意义。
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规则:
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1. **目标是减少字数**，变得更简洁、紧凑。
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2. 必须保留关键信息、专有名词和数字。
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3. 只输出精炼和缩短后的文本，不要包含任何解释或引号。
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---
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[待缩短的文本]
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{text_to_shorten}
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---
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[缩短后的文本]:"""
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payload = {"model": model_name, "prompt": prompt, "stream": False, "options": {'temperature': 0.1}}
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try:
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response = requests.post(f"{OLLAMA_HOST}/api/generate", json=payload, timeout=45)
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response.raise_for_status()
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response_data = response.json()
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refined_text = response_data.get('response', '').strip().replace("\n", " ")
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return re.sub(r'^["\'“‘]|["\'”’]$', '', refined_text)
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except Exception as e:
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self.log_message(f"!! LLM调用失败: {e}")
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return None
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# --- 核心优化算法 ---
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def optimization_worker(self, entries, model_name, use_llm):
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paced_entries = self._optimize_pacing(entries, model_name, use_llm)
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final_entries = self._perform_suturing(paced_entries)
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for i, entry in enumerate(final_entries): entry.index = i + 1
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self.gui_queue.put({"type": "finish", "data": final_entries})
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def _optimize_pacing(self, entries, model_name, use_llm):
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temp_entries = []
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total_count = len(entries)
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for i, entry in enumerate(entries):
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self.gui_queue.put({"type": "progress", "data": {"current": i + 1, "total": total_count}})
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entry.text = entry.text.replace('\n', ' ').strip()
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# --- 策略 1: 处理语速过慢 ---
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is_slow = entry.speed < TARGET_SPEED_STRICT and entry.char_count > 0
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if is_slow:
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ideal_duration = max(entry.char_count / TARGET_SPEED_STRICT, MIN_DURATION_THRESHOLD)
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new_end_td = entry.start_td + timedelta(seconds=ideal_duration)
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new_entry = SrtEntry(0, entry.start_td, new_end_td, entry.text)
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new_entry.optimization_type = "compressed"
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temp_entries.append(new_entry)
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self.log_message(f"[{i+1}] 慢速 -> 压缩时长: '{entry.text}' ({entry.duration:.2f}s -> {new_entry.duration:.2f}s)")
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continue
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# --- 策略 2: 处理语速过快/过长 ---
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is_fast_or_long = entry.speed > FAST_SPEED_THRESHOLD or entry.char_count > SPLIT_CHARS_THRESHOLD
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if is_fast_or_long:
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# 优先级 2.1: 尝试借用时间
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next_entry = entries[i + 1] if i + 1 < total_count else None
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if next_entry:
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gap_duration = (next_entry.start_td - entry.end_td).total_seconds()
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if gap_duration > GAP_BORROW_THRESHOLD:
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ideal_duration = entry.char_count / TARGET_SPEED_STRICT
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needed_time = ideal_duration - entry.duration
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available_time = gap_duration - GAP_SAFE_MARGIN
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time_to_borrow = min(needed_time, available_time)
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if time_to_borrow > 0:
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new_end_td = entry.end_td + timedelta(seconds=time_to_borrow)
|
||||
new_entry = SrtEntry(0, entry.start_td, new_end_td, entry.text)
|
||||
new_entry.optimization_type = "stretched"
|
||||
temp_entries.append(new_entry)
|
||||
self.log_message(f"[{i+1}] 快速 -> 借用时间: '{entry.text}' (借用 {time_to_borrow:.2f}s)")
|
||||
continue
|
||||
|
||||
# 优先级 2.2: 尝试LLM文本缩减
|
||||
if use_llm and self.is_ollama_available:
|
||||
self.log_message(f"[{i+1}] 快速 -> 尝试LLM缩减: '{entry.text}'")
|
||||
shortened_text = self._call_llm_for_shorten(entry.text, model_name)
|
||||
if shortened_text and len(shortened_text) < len(entry.text):
|
||||
new_entry = SrtEntry(0, entry.start_td, entry.end_td, shortened_text)
|
||||
if new_entry.speed <= FAST_SPEED_THRESHOLD * 1.1: # 允许一点点超速
|
||||
new_entry.optimization_type = "shortened"
|
||||
temp_entries.append(new_entry)
|
||||
self.log_message(f"[{i+1}] -> LLM缩减成功: '{shortened_text}'")
|
||||
continue
|
||||
else:
|
||||
self.log_message(f"[{i+1}] -> LLM缩减后仍过快, 放弃。")
|
||||
else:
|
||||
self.log_message(f"[{i+1}] -> LLM缩减失败或无效果。")
|
||||
|
||||
# 优先级 2.3: 句子拆分
|
||||
parts = re.split(r'([。，、？！,?!])', entry.text)
|
||||
sub_sentences = [p for p in ("".join(parts[i:i+2]) for i in range(0, len(parts), 2)) if p.strip()]
|
||||
if len(sub_sentences) > 1:
|
||||
self.log_message(f"[{i+1}] 快速/长句 -> 拆分: '{entry.text}'")
|
||||
total_chars = sum(len(re.sub(r'[\s,.?!。，、？！]', '', s)) for s in sub_sentences)
|
||||
if total_chars == 0: temp_entries.append(entry); continue
|
||||
|
||||
available_speech_time = entry.duration - (len(sub_sentences) - 1) * NATURAL_PAUSE_DURATION
|
||||
if available_speech_time > 0.1:
|
||||
current_start_td = entry.start_td
|
||||
for k, sub_text in enumerate(sub_sentences):
|
||||
sub_chars = len(re.sub(r'[\s,.?!。，、？！]', '', sub_text))
|
||||
sub_duration_sec = (sub_chars / total_chars) * available_speech_time
|
||||
sub_duration_td = timedelta(seconds=sub_duration_sec)
|
||||
|
||||
new_entry = SrtEntry(0, current_start_td, current_start_td + sub_duration_td, sub_text)
|
||||
new_entry.optimization_type = "split"
|
||||
temp_entries.append(new_entry)
|
||||
|
||||
current_start_td += sub_duration_td + timedelta(seconds=NATURAL_PAUSE_DURATION)
|
||||
continue
|
||||
|
||||
# --- 默认策略: 无需处理 ---
|
||||
entry.optimization_type = "original"
|
||||
temp_entries.append(entry)
|
||||
return temp_entries
|
||||
|
||||
def _perform_suturing(self, entries):
|
||||
if not entries: return []
|
||||
final_entries = []; merge_buffer = []
|
||||
def flush_buffer():
|
||||
nonlocal merge_buffer
|
||||
if not merge_buffer: return
|
||||
if len(merge_buffer) == 1: final_entries.append(merge_buffer[0])
|
||||
else:
|
||||
start_time = merge_buffer[0].start_td; end_time = merge_buffer[-1].end_td
|
||||
combined_text = " ".join(e.text for e in merge_buffer)
|
||||
merged_entry = SrtEntry(0, start_time, end_time, combined_text)
|
||||
merged_entry.optimization_type = "compressed" # 缝合的也算一种压缩
|
||||
final_entries.append(merged_entry)
|
||||
merge_buffer = []
|
||||
for entry in entries:
|
||||
if entry.duration < MIN_DURATION_THRESHOLD or entry.char_count < MIN_CHARS_THRESHOLD:
|
||||
merge_buffer.append(entry)
|
||||
else: flush_buffer(); final_entries.append(entry)
|
||||
flush_buffer()
|
||||
return final_entries
|
||||
|
||||
if __name__ == "__main__":
|
||||
root = tk.Tk()
|
||||
app = App(root)
|
||||
root.mainloop()
|
||||
Reference in New Issue
Block a user