chendelian
ffb64b2cfc
- composer.py：抽出 _JIANGCHANG_SUBTITLE_STYLE 常量，FontSize 28→14 / Outline 2→2（保持），1080p 屏幕约占 1.3% 高度，演示视频留足画面呼吸感 - subtitle.py：generate_srt 加 post-process 排队，相邻字幕互相让位 （MIN_DURATION=1.0s / GAP=0.1s），任意时刻屏幕上最多 1 条字幕， 避免开头几秒密集触发的字幕叠成两行 - runner.py：subprocess.Popen 注入 PYTHONIOENCODING=utf-8 + PYTHONUTF8=1， 让 Windows 子进程 Python 强制 UTF-8 输出，runner 端 UTF-8 解码即对齐， 修中文乱码 所有 skill 录屏受益，向后兼容（非 Windows 系统 UTF-8 注入无副作用）。 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> Co-authored-by: Cursor <cursoragent@cursor.com>
82 lines
3.1 KiB
Python
82 lines
3.1 KiB
Python
"""字幕引擎：根据 stdout 关键词打时间戳，生成 SRT 字幕文件。"""
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from __future__ import annotations
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import time
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from dataclasses import dataclass
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from pathlib import Path
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from typing import List, Tuple
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@dataclass
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class _Entry:
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start: float # 距录制开始的秒数
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text: str
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duration: float = 5.0 # 每条字幕默认显示 5 秒
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class SubtitleEngine:
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def __init__(self, script: List[Tuple[str, str]], default_duration: float = 5.0):
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"""
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script: [(关键词, 字幕文案), ...]
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关键词大小写不敏感，每个关键词只触发一次。
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"""
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self._script = script
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self._default_duration = default_duration
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self._entries: List[_Entry] = []
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self._matched: set[str] = set()
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self._t0: float = 0.0
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def set_start_time(self, t: float) -> None:
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self._t0 = t
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def process_line(self, line: str) -> None:
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lower = line.lower()
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for keyword, text in self._script:
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if keyword in self._matched:
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continue
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if keyword.lower() in lower:
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elapsed = time.time() - self._t0
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self._entries.append(_Entry(start=elapsed, text=text, duration=self._default_duration))
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self._matched.add(keyword)
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def generate_srt(self, output_path: str) -> None:
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"""生成 SRT 文件，自动处理字幕重叠。
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字幕重叠修复策略（避免屏幕上同时显示 2+ 条叠成两行）：
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- 字幕按 start 时间升序排序后；
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- 相邻字幕保留 GAP=0.1s 间隔；
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- 每条字幕保证至少 MIN_DURATION=1.0s 显示时间（短到这个值仍读不完是字幕脚本设计问题）；
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- 若当前条让位给下一条后剩余时间 < MIN_DURATION，则把下一条 start 往后推。
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这样任意时刻屏幕上最多 1 条字幕。
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"""
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def _fmt(s: float) -> str:
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h = int(s // 3600)
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m = int((s % 3600) // 60)
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sec = int(s % 60)
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ms = int((s % 1) * 1000)
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return f"{h:02d}:{m:02d}:{sec:02d},{ms:03d}"
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# 防重叠 post-process
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MIN_DURATION = 1.0
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GAP = 0.1
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entries = sorted(self._entries, key=lambda e: e.start)
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for i in range(len(entries) - 1):
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cur, nxt = entries[i], entries[i + 1]
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max_end = nxt.start - GAP
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new_dur = max_end - cur.start
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if new_dur < MIN_DURATION:
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# 太挤：cur 至少撑 MIN_DURATION 秒，把 nxt 推迟
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cur.duration = MIN_DURATION
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nxt.start = cur.start + MIN_DURATION + GAP
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else:
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# 正常让位：cur 显示到 (nxt.start - GAP)
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cur.duration = min(cur.duration, new_dur)
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# 最后一条不需要让位，保持原 duration
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Path(output_path).parent.mkdir(parents=True, exist_ok=True)
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with open(output_path, "w", encoding="utf-8") as f:
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for i, e in enumerate(entries, 1):
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f.write(f"{i}\n")
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f.write(f"{_fmt(e.start)} --> {_fmt(e.start + e.duration)}\n")
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f.write(f"{e.text}\n\n")
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