belarebia
Open source · MIT · every language Gemini speaks

Hello.Bridge any twocommunities.

Drop any video URL or upload a file. Pick any language Gemini knows. Get an HD MP4 with subtitles burned in — plus the .srt and .txt.

Try it now Star on GitHub
85+ languagesUp to 4K sourceSelf-hosted in 3 cmds
The why

Most of the internet is in three languages.
The world isn't.

  • A video that would change your week.
  • A lecture that would unlock your degree.
  • A tutorial that would crack your hardest bug.

It's just not in your language yet.

الدارجةالعربيةⵜⴰⵎⴰⵣⵉⵖⵜFrançaisEnglishEspañol中文日本語한국어हिन्दीPortuguêsDeutschРусскийItalianoTürkçeবাংলাภาษาไทยTiếng ViệtPolskiעבריתفارسیKiswahiliNederlandsΕλληνικάBahasaTagalogالدارجةالعربيةⵜⴰⵎⴰⵣⵉⵖⵜFrançaisEnglishEspañol中文日本語한국어हिन्दीPortuguêsDeutschРусскийItalianoTürkçeবাংলাภาษาไทยTiếng ViệtPolskiעבריתفارسیKiswahiliNederlandsΕλληνικάBahasaTagalog
CatalàMagyarČeštinaУкраїнськаSlovenčinaБългарскиHrvatskiRomânăSvenskaSuomiNorskDanskÍslenskaCymraegGaeilgeEuskaraGalegoQuốc ngữਪੰਜਾਬੀதமிழ்తెలుగుमराठीગુજરાતીසිංහලខ្មែរລາວမြန်မာCatalàMagyarČeštinaУкраїнськаSlovenčinaБългарскиHrvatskiRomânăSvenskaSuomiNorskDanskÍslenskaCymraegGaeilgeEuskaraGalegoQuốc ngữਪੰਜਾਬੀதமிழ்తెలుగుमराठीગુજરાતીසිංහලខ្មែរລາວမြန်မာ
What we believe

Four principles, none negotiable.

Inclusive by default

Every script, every dialect, same engine. No "low-resource language" tier.

Fair pricing, in the open

Hosted = passthrough cost +20% buffer +20% margin. Self-host = $0 forever.

Your key, your machine

API keys live in browser memory. Never on our disk. Never in a log.

Boring tech that works

yt-dlp · ffmpeg · libass · Gemini. No bespoke ML, no GPU farm. Works on a laptop.

~/projects/belarebia
$ belarebia "https://youtu.be/…" --language "Spanish"

[1/5] downloading 1080p
[2/5] extracting audio
[3/5] transcribing 4115s in 9 chunks…
[4/5] translating 768 segments…
[5/5] burning + encoding HD

✓ ~/Desktop/belarebia_…/  output_target.mp4
The product

Introducing the Belarebia engine.

One pipeline, two surfaces — a polished web dashboard and a single-line CLI. Both run the same five-step flow: download → transcribe → translate → burn → ship.

Word-accurate timestamps · Gemini 2.5 Flash
Idiomatic translation · Gemini 2.5 Pro
HD hardware encode · videotoolbox
Three exports · MP4, .srt, .txt
Who it's for

Three audiences, one tool.

If your work touches video and another language, you have a use case.

For creators

  • →Subtitle your podcast in 12 languages and cross-post to YouTube, Reels, TikTok the same day.
  • →Re-cut a long-form interview into vertical clips — keep the burned subs intact.
  • →Localize sponsorship reads automatically per region.

For educators

  • →Caption a 90-min university lecture into your students' native language.
  • →Build a multilingual MOOC: one source, 30 sub tracks, students pick at watch time.
  • →Generate the full transcript .txt for note-taking and search.

For marketers & researchers

  • →Watch a 70-minute earnings call in Mandarin without speaking Mandarin.
  • →Run a global focus-group montage with translated captions for the deck.
  • →Pull SRT + TXT to feed downstream tools (search, analytics, fact-checks).
How it's built

Decisions you'll feel.

Idiom-aware translation

Output reads like a fluent speaker, not a textbook — across 85+ languages.

Script-aware burn

Geeza Pro for Arabic shaping, PingFang for CJK, Helvetica for Latin — auto-picked.

Three exports, every job

HD MP4, .srt for re-use elsewhere, .txt for search and notes.

Resilient on long video

Past 25 min the engine chunks audio into 8-min slices then stitches timestamps.

What you'd build with it

Three Saturday projects.

Subtitle your YouTube backlog overnight

A monthly cron + a list of URLs = every video on your channel translated to 5 languages while you sleep.

Localize a course at zero marginal cost

One source mp4. Run 30 times with different --language. You now have 30 dub-ready masters.

Build a search index from podcasts

Use the .txt export to feed any embeddings store. The .srt gives you the timestamps, the .txt gives you the prose.

Pick a video. Pick a language.
Watch the world shrink.

Free, MIT-licensed, runs entirely on your machine. Bring your own Gemini key. Or pay $2.08/hour processed and skip the setup.

Try the translator Star on GitHub