视听第二大脑A second brain for video & audio
把文件夹、YouTube、播客指给 Cerul。它在你自己的机器上索引你看过、听过的一切，让你按「意思」搜索，一键跳到那一刻。
Point Cerul at your folders, YouTube channels, and podcasts. It indexes everything you watch and hear — on your own machine — so you search by meaning and jump straight to the moment.
全局快捷键浮层 — 一个键，从任何地方搜你的视听库The global overlay — one keystroke, search your library from anywhere
你学到的大部分东西，都锁在视频和音频里。Most of what you learn is locked inside video and audio.
讲座、播客、录播会议、教程 —— 最难搜索的内容。转写只记下「说了什么」，其余的全锁在你再也不会重看的文件里。Cerul 把它们变成可搜索、本地优先的记忆。Talks, podcasts, recorded calls, tutorials — the hardest content to search. A transcript captures what was said; the rest is locked inside files you'll never scrub through again. Cerul turns them into searchable, local-first memory.
找到那一刻，而不只是文件Find the moment, not just the file
按意思搜索Search by meaning
全文（SQLite/FTS）+ 向量混合检索，按语义找到关键一刻，而不只是关键词。每条结果都高亮命中的原话。Hybrid retrieval — full-text (SQLite/FTS) plus vectors — finds the moment by meaning, not just keywords. Every result highlights the matched line.
本地优先Local-first
媒体、转写、向量索引都在你的磁盘上。推理走你自己的 provider key，或完全本地的模型 —— 无需 Cerul 账号。Media, transcripts, and the vector index all stay on your disk. Inference runs through your own keys, or fully local models — no Cerul account required.
随时在手边Always on, out of the way
全局快捷键浮层、菜单栏托盘、后台索引、开机自启。它一直在工作，离你只有一个快捷键。A global hotkey overlay, menu-bar tray, background indexing, and start-at-login. It stays one keystroke away.
⌥ Space多来源，一起索引Many sources, one index
本地文件夹、YouTube 频道与视频、播客 RSS 订阅 —— 指过去，Cerul 在本地监看并持续索引。Local folders, YouTube channels and videos, and podcast RSS feeds — point Cerul at them and it watches and indexes locally.
三步，把视听变成可搜索的记忆Three steps to searchable memory
指向来源Point it at sources
添加文件夹、YouTube 频道或播客订阅。Cerul 在本地监看它们。Add a folder, a YouTube channel, or a podcast feed. Cerul watches them locally.
本地索引It indexes locally
提取音频、转写（你的 key 或本地模型）、写入全文索引，再生成向量。Extract audio, transcribe (your key or a local model), write the full-text index, then embed.
搜索那一刻Search the moment
在浮层里按意思搜索，跳到精确时间点，内置播放器即刻播放。Search by meaning in the overlay, jump to the exact timestamp, play it inline.
一个本地 API，喂给你的 agentA local API your agents can call
Cerul Core 在 127.0.0.1:7777 暴露一个本地 REST API。coding agent、脚本和自动化可以直接查询你自己的视听库 —— 全程不离开本机。开源，FSL-1.1-ALv2。Cerul Core exposes a local REST API on 127.0.0.1:7777. Coding agents, scripts, and automations query your own library directly — without anything leaving your machine. Open-source, FSL-1.1-ALv2.
# 按意思搜你自己的库search your own library by meaning
curl -X POST 127.0.0.1:7777/search \
-d '{"q": "what they said about scaling laws"}'
# → { "hits": [{ "item": "...", "t": "20:23" }] }同一个视听记忆层，两种用法One memory layer for video. Two ways to use it.
本地、开源、由你掌控Local, open, yours
- 在你自己的机器上索引与搜索Indexes and searches on your own machine
- 桌面应用 + 全局浮层 + 本地 APIDesktop app + global overlay + local API
- 免费 · 开源自托管 · 你的 keyFree · self-hosted · your keys
托管的视频搜索 APIA hosted video-search API
- 给 AI agent 的视频搜索接口Video search the way agents call it
- 托管索引，账号支持的同步Managed indexing, account-backed sync
- 为团队与规模而建Built for teams and scale
下载前你可能想问Before you download
我的数据会上传吗？Does my data leave my machine?
媒体、转写和向量索引都留在你本地磁盘。转写/嵌入走你自己的 provider key 或本地模型。唯一的例外是「画面理解」（幻灯片/图表）——那是可选 beta，经 Gemini 云，默认不开。Media, transcripts, and the vector index all stay on your local disk. Transcription/embedding runs through your own provider keys or local models. The only exception is visual understanding (slides/charts) — an opt-in beta via Gemini, off by default.
要账号吗？收费吗？Do I need an account? Is it free?
不需要账号，App 免费且开源。转写/嵌入用你自己的 provider key（按量付给服务商），或用本地模型（Apple Silicon）完全免费、离线。No account needed; the app is free and open-source. Transcription/embedding uses your own provider keys (you pay the provider directly), or fully free, offline local models on Apple Silicon.
支持哪些系统？Which platforms?
现在是 macOS（Apple Silicon），安装包已签名 & 公证。Windows 与 Linux 即将推出。macOS (Apple Silicon) today, with signed & notarized installers. Windows and Linux are coming soon.
能离线用吗？Does it work offline?
选本地模型即可完全离线（Apple Silicon）。用远程 provider key 时，转写/嵌入那一步需要联网。Yes — choose local models and it runs fully offline on Apple Silicon. With remote provider keys, only the transcription/embedding step needs the network.
和 cerul.ai 是什么关系？How does it relate to cerul.ai?
Cerul App 是本地、自托管的桌面应用（这个页面）。cerul.ai 是托管的视频搜索 API，给 AI agent 用。App 可以完全独立使用，Cloud 账号是可选的。Cerul App is the local, self-hosted desktop app (this site). cerul.ai is the hosted video-search API for AI agents. The app works fully standalone; a Cloud account is optional.
你的机器，你的数据。Your machine, your data.
媒体、转写和向量索引都留在本地。画面理解（幻灯片、图表）为可选 beta，经 Gemini。无遥测追踪你看了什么。Media, transcripts, and the vector index stay on disk. Visual understanding (slides, charts) is an opt-in beta via Gemini. No telemetry on what you watch.
把你看过、听过的一切，变成可搜索的记忆。Turn everything you watch and hear into searchable memory.
免费下载，用你自己的 key 或本地模型。几分钟内就能搜到第一段视频里的那一刻。Download free, bring your own keys or run local models. Find your first moment in minutes.
macOS（Apple Silicon）现已可用 · Windows 与 Linux 即将推出macOS (Apple Silicon) today · Windows & Linux coming soon