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自动捕获并导出 B站字幕。默认导出 TXT，按需勾选 SRT/JSON。支持自定义 URL 匹配规则、去重防重复下载、可视化面板。
当前为
// ==UserScript==
// @name B站字幕导出助手（默认TXT，可选SRT/JSON）
// @name:en Bilibili AI Subtitle Exporter (TXT by default, optional SRT/JSON)
// @namespace http://greasyfork.icu/users/1534786-seas-lofty
// @version 1.0.1
// @description 自动捕获并导出 B站字幕。默认导出 TXT，按需勾选 SRT/JSON。支持自定义 URL 匹配规则、去重防重复下载、可视化面板。
// @description:en Capture and export Bilibili subtitles. TXT by default, SRT/JSON optional. Custom URL regex, de-duplication, and UI panel.
// @author <yehai>
// @license MIT
// @match https://www.bilibili.com/video/*
// @run-at document-start
// @grant GM_download
// @grant GM_registerMenuCommand
// @grant GM_notification
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_addStyle
// @compatible chrome
// @compatible firefox
// @compatible edge
// @icon https://static.biligame.net/biligame/favicons/favicon-32x32.png
// @antifeature n/a
// ==/UserScript==
(function () {
'use strict';
/* ================== 配置（持久化） ================== */
const defaults = {
// 导出选项：默认仅 TXT 开启
exportTXT: true,
exportSRT: false,
exportJSON: false,
autoDownload: true, // 捕获后自动导出所选格式
autoNotify: false, // 桌面通知
panelVisible: true, // 面板默认显示
// 命名模板
txtTemplate: '{bv}_{p?}_{ts}.txt',
srtTemplate: '{bv}_{p?}_{ts}.srt',
jsonTemplate: '{bv}_{p?}_{ts}.json',
// URL 匹配正则（字符串，new RegExp(str,'i')）
urlRegexStr: 'subtitle',
// 可选：尝试自动点击“字幕：中文（中国）”
autoTryClickAI: false,
// TXT 整理参数
pauseBreakSec: 1.2,
maxLineChars: 60,
dedupePunct: true,
trimNoise: true,
keepMusic: false,
// 去重窗口（毫秒）：同 URL 近距离重复响应只保留一个（内容不同则保留）
dedupeWindowMs: 2500
};
const CFG = new Proxy({}, {
get(_, k) { return GM_getValue(k, defaults[k]); },
set(_, k, v) { GM_setValue(k, v); return true; }
});
/* ================== 工具函数 ================== */
const log = (...a) => console.log('[bili-ai-sub-export]', ...a);
function makeUrlRegex() {
const raw = String(CFG.urlRegexStr || defaults.urlRegexStr);
try { return new RegExp(raw, 'i'); }
catch (e) { console.warn('URL 正则无效，回退默认：', e); return new RegExp(defaults.urlRegexStr, 'i'); }
}
let URL_RE = makeUrlRegex();
function deriveBVandP(url) {
let bv = 'unknown', p = null;
try {
const u = new URL(url, location.origin);
const m = u.pathname.match(/\/video\/(BV[\w]+)/i);
if (m) bv = m[1];
if (u.searchParams.has('p')) p = u.searchParams.get('p');
if (!p) {
const node = document.querySelector('.multi-page .cur,.publish .p-select .cur');
if (node) p = node.textContent.trim().replace(/\D/g, '');
}
} catch (_) {}
return { bv, p };
}
function genFilename(template, pageUrl) {
const { bv, p } = deriveBVandP(pageUrl || location.href);
const ts = new Date().toISOString().replace(/[:.]/g, '-');
return template.replace('{bv}', bv)
.replace('{p?}', p ? ('p' + p) : '')
.replace('{ts}', ts)
.replace(/_{2,}/g, '_');
}
// 简单 32-bit hash（足够做去重指纹）
function hash32(str) {
let h = 0, i = 0, len = str.length;
while (i < len) { h = (h << 5) - h + str.charCodeAt(i++) | 0; }
return (h >>> 0).toString(16);
}
// 解析 JSON：先 text，再走多策略 parse
function tryParseJsonFromText(rawText) {
if (typeof rawText !== 'string' || !rawText.length) return null;
let t = rawText.replace(/^\uFEFF/, ''); // 去 BOM
try { return JSON.parse(t); } catch (_) {}
// 容错1：截掉末尾多余逗号（极少见）
try { return JSON.parse(t.replace(/,\s*([}\]])/g, '$1')); } catch (_) {}
// 容错2：如果是 JSONP/包裹层，提取 {...}
const m = t.match(/\{[\s\S]*\}$/);
if (m) { try { return JSON.parse(m[0]); } catch (_) {} }
return null;
}
async function respToTextThenJson(resp) {
// 先 text 再 parse，避免某些 content-type 不是 application/json
let text = '';
try { text = await resp.text(); } catch (_) {}
const json = tryParseJsonFromText(text);
return { text, json };
}
function toSrtTime(sec) {
sec = Number(sec) || 0;
const ms = Math.floor((sec % 1) * 1000);
const total = Math.floor(sec);
const h = Math.floor(total / 3600);
const m = Math.floor((total % 3600) / 60);
const s = total % 60;
const pad = (n, w = 2) => String(n).padStart(w, '0');
return `${pad(h)}:${pad(m)}:${pad(s)},${String(ms).padStart(3, '0')}`;
}
function jsonToSrt(json) {
if (!json) return '';
let segs = null;
if (Array.isArray(json)) segs = json;
if (!segs) {
segs = json.body || json.result || json.segments || json.data || null;
if (segs && !Array.isArray(segs) && Array.isArray(segs.segments)) segs = segs.segments;
}
if (!Array.isArray(segs)) {
const found = (function dig(o){
if (!o || typeof o !== 'object') return null;
for (const k of Object.keys(o)) {
const v = o[k];
if (Array.isArray(v)) {
if (v.length && (v[0].from !== undefined || v[0].start !== undefined || v[0].content || v[0].text)) return v;
for (const it of v) { if (typeof it === 'object') { const r = dig(it); if (r) return r; } }
} else if (typeof v === 'object') {
const r = dig(v); if (r) return r;
}
}
return null;
})(json);
if (found) segs = found;
}
if (!Array.isArray(segs)) return '';
return segs.map((seg, idx) => {
const start = seg.from ?? seg.start_time ?? seg.start ?? seg.st ?? 0;
const end = seg.to ?? seg.end_time ?? seg.end ?? (start + (seg.d ?? 2));
const text = (seg.content || seg.text || seg.sentence || seg.t || seg.c || '').toString().trim();
return `${idx + 1}\n${toSrtTime(start)} --> ${toSrtTime(end)}\n${text}\n`;
}).join('\n');
}
function buildTranscriptFromBili(json) {
const cfg = {
pauseBreakSec: Number(CFG.pauseBreakSec) || defaults.pauseBreakSec,
maxLineChars: Number(CFG.maxLineChars) || defaults.maxLineChars,
dedupePunct: !!CFG.dedupePunct,
trimNoise: !!CFG.trimNoise,
keepMusic: !!CFG.keepMusic
};
const segs = (json && json.body) ? json.body.slice() : [];
if (!segs.length) return '';
segs.sort((a,b)=> (a.from||0) - (b.from||0));
const arr = [];
for (const s of segs) {
if (!cfg.keepMusic && typeof s.music === 'number' && s.music > 0) continue;
const text = (s.content||'').replace(/\s+/g,' ').trim();
if (!text) continue;
arr.push({from:+s.from||0, to:+s.to||(+s.from||0)+2, text});
}
if (!arr.length) return '';
const lines = [];
let buf = [arr[0].text];
for (let i=1;i<arr.length;i++){
const gap = arr[i].from - arr[i-1].to;
if (gap >= cfg.pauseBreakSec) { lines.push(buf.join(' ')); buf=[arr[i].text]; }
else buf.push(arr[i].text);
}
if (buf.length) lines.push(buf.join(' '));
function clean(s){
if (cfg.dedupePunct){
s = s.replace(/([。！？!?])\1+/g, '$1')
.replace(/，，+/g, '，').replace(/。。+/g, '。').replace(/、、+/g, '、');
}
if (cfg.trimNoise){
s = s.replace(/\s*([。！？!?，、；：,.])\s*/g, '$1').replace(/\s+/g,' ').trim();
}
return s;
}
const cleaned = lines.map(clean);
function wrap(line, limit){
if (!limit || line.length <= limit) return [line];
const res = [];
let rest = line;
while (rest.length > limit){
let cut = rest.lastIndexOf(' ', limit);
if (cut < limit*0.6) {
const punctPos = Math.max(
rest.lastIndexOf('，', limit),
rest.lastIndexOf('。', limit),
rest.lastIndexOf('、', limit),
rest.lastIndexOf('；', limit),
rest.lastIndexOf('：', limit),
rest.lastIndexOf(',', limit),
rest.lastIndexOf('.', limit)
);
cut = Math.max(cut, punctPos);
}
if (cut <= 0) cut = limit;
res.push(rest.slice(0, cut).trim());
rest = rest.slice(cut).trim();
}
if (rest) res.push(rest);
return res;
}
const out = [];
for (const l of cleaned) for (const w of wrap(l, cfg.maxLineChars)) out.push(w);
return out.join('\n');
}
async function safeDownload(filename, content, mime = 'application/octet-stream') {
if (typeof GM_download === 'function') {
try {
const blob = new Blob([content], { type: mime });
const url = URL.createObjectURL(blob);
GM_download({ url, name: filename, saveAs: false, onerror: () => fallback() });
setTimeout(() => URL.revokeObjectURL(url), 5000);
return;
} catch (_) {}
}
fallback();
function fallback() {
const blob = new Blob([content], { type: mime });
const a = document.createElement('a');
a.href = URL.createObjectURL(blob);
a.download = filename;
document.body.appendChild(a);
a.click();
a.remove();
setTimeout(() => URL.revokeObjectURL(a.href), 5000);
}
}
function shortName() {
const { bv, p } = deriveBVandP(location.href);
const ts = new Date().toLocaleString();
return `${bv}${p ? ' p' + p : ''} · ${ts}`;
}
/* ================== 去重与记录 ================== */
const entries = []; // 展示列表
const seenMap = new Map(); // key: url -> { ts:number, hash:string }
const exportedSignatures = new Set(); // 防止重复导出（url#hash）
function shouldAccept(url, text) {
const now = Date.now();
const key = url;
const h = hash32(text || '');
const sig = `${key}#${h}`;
// 已导出过这个签名，丢弃
if (exportedSignatures.has(sig)) return false;
const prev = seenMap.get(key);
if (prev) {
// 窗口内且内容相同 => 丢弃
if ((now - prev.ts) < (Number(CFG.dedupeWindowMs) || defaults.dedupeWindowMs) && prev.hash === h) {
return false;
}
}
// 记录最新快照
seenMap.set(key, { ts: now, hash: h });
return true;
}
/* ================== 导出流程 ================== */
async function exportByChoice(e) {
// 记录签名，防重复导出
const sig = `${e.url}#${hash32(e.text || '')}`;
if (exportedSignatures.has(sig)) return;
exportedSignatures.add(sig);
// TXT（默认）
if (CFG.exportTXT) {
const txt = buildTranscriptFromBili(e.json);
if (txt && txt.trim()) {
const name = genFilename(CFG.txtTemplate, e.pageUrl);
await safeDownload(name, txt, 'text/plain;charset=utf-8');
}
}
// SRT（可选）
if (CFG.exportSRT) {
const srt = jsonToSrt(e.json);
if (srt && srt.trim()) {
const name = genFilename(CFG.srtTemplate, e.pageUrl);
await safeDownload(name, srt, 'text/plain;charset=utf-8');
}
}
// JSON（可选）
if (CFG.exportJSON) {
const name = genFilename(CFG.jsonTemplate, e.pageUrl);
await safeDownload(name, JSON.stringify(e.json ?? tryParseJsonFromText(e.text) ?? {}, null, 2), 'application/json;charset=utf-8');
}
if (CFG.autoNotify && typeof GM_notification === 'function') {
GM_notification({ title: 'B站字幕导出', text: `${shortName()} 导出完成`, timeout: 2500 });
}
}
async function handleCaptured(url, text, json) {
if (!shouldAccept(url, text)) { log('去重：忽略重复响应', url); return; }
const id = 'e' + (Date.now() + Math.random()).toString(36);
const e = { id, url, text, json: json ?? tryParseJsonFromText(text), pageUrl: location.href, exported: false };
entries.push(e);
renderUI();
if (CFG.autoDownload) {
await exportByChoice(e);
e.exported = true;
renderUI();
}
}
/* ================== 拦截 fetch / XHR ================== */
(function interceptFetch() {
const orig = window.fetch;
window.fetch = async function (...args) {
const resp = await orig.apply(this, args);
try {
const url = typeof args[0] === 'string' ? args[0] : (args[0] && args[0].url) || '';
if (URL_RE.test(url)) {
const clone = resp.clone();
const { text, json } = await respToTextThenJson(clone);
await handleCaptured(url, text, json);
}
} catch (e) { log('fetch 捕获异常', e); }
return resp;
};
log('fetch 拦截已启用');
})();
(function interceptXHR() {
const XHR = window.XMLHttpRequest;
const open = XHR.prototype.open;
const send = XHR.prototype.send;
XHR.prototype.open = function (method, url) {
this._bai_url = url;
return open.apply(this, arguments);
};
XHR.prototype.send = function () {
const url = this._bai_url || '';
if (URL_RE.test(url)) {
this.addEventListener('readystatechange', async function () {
try {
if (this.readyState === 4) {
const text = (typeof this.responseText === 'string') ? this.responseText : '';
const json = tryParseJsonFromText(text);
await handleCaptured(url, text, json);
}
} catch (e) { log('XHR 捕获异常', e); }
});
}
return send.apply(this, arguments);
};
log('XHR 拦截已启用');
})();
/* ==================（可选）自动点“字幕” ================== */
async function tryClickAI() {
if (!CFG.autoTryClickAI) return;
try {
await waitFor(() => document.querySelector('.bpx-player-ctrl-subtitle,.bpx-player-ctrl-setting,.bpx-player-ctrl-btn-subtitle'), 10000);
const btn = document.querySelector('.bpx-player-ctrl-subtitle,.bpx-player-ctrl-btn-subtitle');
if (btn) btn.click();
else {
const gear = document.querySelector('.bpx-player-ctrl-setting');
if (gear) {
gear.click();
await sleep(200);
const sub = [...document.querySelectorAll('*')].find(n => n.textContent && n.textContent.includes('字幕'));
if (sub) sub.click();
}
}
await sleep(200);
const aiItem = [...document.querySelectorAll('*')].find(n => n.textContent && /AI\s*字幕.*中文（中国）|AI字幕：中文（中国）/.test(n.textContent));
if (aiItem) aiItem.click();
} catch (e) { log('自动点击字幕失败（可忽略）', e); }
}
function sleep(ms){ return new Promise(r => setTimeout(r, ms)); }
function waitFor(fn, timeout=8000, step=200){
return new Promise((res, rej) => {
const t0 = Date.now();
(function loop(){
try { const v = fn(); if (v) return res(v); } catch(_){}
if (Date.now() - t0 > timeout) return rej(new Error('waitFor timeout'));
setTimeout(loop, step);
})();
});
}
window.addEventListener('load', () => {
setTimeout(() => { if (CFG.panelVisible) injectUI(); tryClickAI(); }, 1200);
});
/* ================== UI 面板 ================== */
function injectUI() {
if (document.getElementById('baiui-panel')) return;
GM_addStyle(`
#baiui-panel{
position:fixed;right:12px;top:72px;z-index:99999;
background:rgba(25,25,25,.9);color:#fff;
font:12px/1.4 system-ui;border-radius:8px;
padding:10px;min-width:290px;
box-shadow:0 6px 18px rgba(0,0,0,.45)
}
#baiui-panel button{
cursor:pointer;border:none;border-radius:6px;
padding:6px 10px;font-size:12px;transition:all .2s
}
#baiui-panel button:hover{filter:brightness(1.1);}
.btn-primary{background:#1e90ff;color:#fff;}
.btn-dark{background:#444;color:#fff;}
.btn-light{background:#f1f1f1;color:#000;}
#baiui-panel .row{display:flex;gap:8px;align-items:center;margin:6px 0;flex-wrap:wrap}
#baiui-list{max-height:220px;overflow:auto;
border-top:1px solid rgba(255,255,255,.08);
margin-top:6px;padding-top:6px}
#baiui-list .item{padding:6px;border-bottom:1px dashed rgba(255,255,255,.08)}
#baiui-list .meta{opacity:.7;font-size:11px;margin-top:4px;word-break:break-all}
#baiui-title{display:flex;justify-content:space-between;align-items:center}
#baiui-kv input,#baiui-kv textarea{
width:100%;padding:6px;border-radius:6px;
border:1px solid rgba(255,255,255,.2);
background:rgba(255,255,255,.08);color:#fff;
}
#baiui-kv textarea{min-height:48px;resize:vertical}
#baiui-help{opacity:.7;font-size:11px;line-height:1.4;margin-top:4px}
.chk{display:flex;align-items:center;gap:4px}
#baiui-guide{
background:rgba(255,255,255,.08);
border-radius:6px;padding:6px;margin-top:6px;
font-size:12px;line-height:1.5;opacity:.85;
}
`);
const el = document.createElement('div');
el.id = 'baiui-panel';
el.innerHTML = `
<div id="baiui-title">
<strong>字幕导出</strong>
<button id="baiui-toggle" class="btn-dark">${CFG.panelVisible ? '隐藏' : '显示'}</button>
</div>
<div id="baiui-kv" style="margin-top:6px;">
<div class="row">
<span class="chk"><input type="checkbox" id="chk-txt">TXT</span>
<span class="chk"><input type="checkbox" id="chk-srt">SRT</span>
<span class="chk"><input type="checkbox" id="chk-json">JSON</span>
<span class="chk" style="margin-left:auto"><input type="checkbox" id="chk-auto">自动下载</span>
</div>
<div class="row">
<span class="chk"><input type="checkbox" id="chk-notify">导出通知</span>
</div>
<div id="baiui-guide">
▶ <b>使用说明：</b><br>
1️⃣ 打开视频后，点击播放器右下角的「字幕」按钮；<br>
2️⃣ 选择「中文（中国）」或者其他语言，支持AI生成的字幕；<br>
3️⃣ 本脚本会自动捕获字幕并导出为 TXT（默认）；
若勾选 SRT/JSON，则同步导出对应文件。
</div>
<div class="row"><label>文件命名模板：</label></div>
<div class="row"><input id="ipt-txt" placeholder="{bv}_{p?}_{ts}.txt"></div>
<div class="row"><input id="ipt-srt" placeholder="{bv}_{p?}_{ts}.srt"></div>
<div class="row"><input id="ipt-json" placeholder="{bv}_{p?}_{ts}.json"></div>
<div id="baiui-help">
命名规则说明：<br>
• <b>{bv}</b> → 视频 BV 号，例如 BV1ab411R7Ct<br>
• <b>{p?}</b> → 分 P 号（如果有则添加，如 p2，否则留空）<br>
• <b>{ts}</b> → 导出时间戳，防止重名<br>
示例：<code>BV1ab411R7Ct_p2_2025-11-06T20-50-10.txt</code>
</div>
<div class="row"><label>URL 匹配正则：</label></div>
<div class="row"><textarea id="ipt-urlre" placeholder="subtitle"></textarea></div>
<div id="baiui-help">
示例：<br>
<code>ai_subtitle</code>（宽松匹配）<br>
<code>^https?:\\/\\/aisubtitle\\.hdslb\\.com\\/bfs\\/ai_subtitle\\/prod\\/.*$</code>（严格匹配）
</div>
<div class="row" style="justify-content:flex-end;gap:8px">
<button id="btn-save" class="btn-primary">保存设置</button>
<button id="btn-export" class="btn-light">导出全部</button>
<button id="btn-clear" class="btn-light">清空记录</button>
</div>
</div>
<div id="baiui-list"></div>
`;
document.body.appendChild(el);
const $ = s => el.querySelector(s);
$('#chk-txt').checked = !!CFG.exportTXT;
$('#chk-srt').checked = !!CFG.exportSRT;
$('#chk-json').checked = !!CFG.exportJSON;
$('#chk-auto').checked = !!CFG.autoDownload;
$('#chk-notify').checked = !!CFG.autoNotify;
$('#ipt-txt').value = CFG.txtTemplate;
$('#ipt-srt').value = CFG.srtTemplate;
$('#ipt-json').value = CFG.jsonTemplate;
$('#ipt-urlre').value = CFG.urlRegexStr;
$('#btn-save').addEventListener('click', () => {
CFG.exportTXT = $('#chk-txt').checked;
CFG.exportSRT = $('#chk-srt').checked;
CFG.exportJSON = $('#chk-json').checked;
CFG.autoDownload = $('#chk-auto').checked;
CFG.autoNotify = $('#chk-notify').checked;
CFG.txtTemplate = $('#ipt-txt').value.trim() || defaults.txtTemplate;
CFG.srtTemplate = $('#ipt-srt').value.trim() || defaults.srtTemplate;
CFG.jsonTemplate = $('#ipt-json').value.trim() || defaults.jsonTemplate;
const regexStr = $('#ipt-urlre').value.trim() || defaults.urlRegexStr;
try { new RegExp(regexStr, 'i'); } catch (e) { return alert('URL 正则无效：' + e.message); }
CFG.urlRegexStr = regexStr;
URL_RE = makeUrlRegex();
notify('设置已保存');
});
$('#btn-export').addEventListener('click', async () => {
if (!entries.length) return alert('暂无记录');
for (const e of entries) {
if (!e.exported) { await exportByChoice(e); e.exported = true; }
}
renderUI(); notify('导出完成');
});
$('#btn-clear').addEventListener('click', () => {
if (!confirm('确定清空已捕获记录？')) return;
entries.length = 0; renderUI();
});
$('#baiui-toggle').addEventListener('click', () => {
const body = $('#baiui-kv');
const hidden = body.style.display === 'none';
body.style.display = hidden ? '' : 'none';
$('#baiui-toggle').textContent = hidden ? '隐藏' : '显示';
CFG.panelVisible = hidden;
});
renderUI();
}
function renderUI() {
const list = document.querySelector('#baiui-list');
if (!list) return;
if (!entries.length) {
list.innerHTML = `<div style="opacity:.7">尚未捕获到匹配“URL 正则”的响应。请在播放器中开启「字幕」。</div>`;
return;
}
list.innerHTML = entries.slice().reverse().map(e => `
<div class="item">
<div style="display:flex;justify-content:space-between;align-items:center;">
<div>${shortName()}</div>
<div><button data-id="${e.id}" class="btn2 one-export">导出</button></div>
</div>
<div class="meta">${e.url}</div>
</div>
`).join('');
list.querySelectorAll('.one-export').forEach(btn => {
btn.addEventListener('click', async ev => {
const id = ev.currentTarget.getAttribute('data-id');
const e = entries.find(x => x.id === id);
if (e) { await exportByChoice(e); e.exported = true; renderUI(); }
});
});
}
function notify(text) {
if (CFG.autoNotify && typeof GM_notification === 'function') {
GM_notification({ title: 'B站字幕导出', text, timeout: 2500 });
} else {
console.log('[bili-ai-sub-export]', text);
}
}
// 菜单
if (typeof GM_registerMenuCommand === 'function') {
GM_registerMenuCommand('显示/隐藏面板', () => {
const p = document.getElementById('baiui-panel');
if (!p) injectUI();
else { p.style.display = (p.style.display === 'none') ? '' : 'none'; CFG.panelVisible = (p.style.display !== 'none'); }
});
GM_registerMenuCommand('导出全部记录', async () => {
if (!entries.length) return alert('暂无记录');
for (const e of entries) { if (!e.exported) { await exportByChoice(e); e.exported = true; } }
renderUI(); notify('导出完成');
});
GM_registerMenuCommand('清空记录', () => { if (!confirm('确定清空已捕获记录？')) return; entries.length = 0; renderUI(); });
}
})();