Live Transcription

Broadcast
to text.
In under 2 s.

Q: What is the actual transcription latency?

Latency is under 2 seconds between broadcast and text delivery.

Q: Which broadcast streams can you ingest?

OnAirText supports terrestrial TV (DVB-T/T2/S / TNT), HLS and DASH streams for webTV and OTT platforms, RTMP and RTSP for enterprise live and IPTV, FM and DAB+ radio, and uploaded files (MP3, MP4, WAV, MKV, AAC) for deferred processing.

Q: Who owns the transcriptions?

The client retains full ownership of all transcriptions. OnAirText claims no rights over produced data and does not use it for any secondary purpose.

Q: Does OnAirText support EBU-TT and STL broadcast formats?

Yes. OnAirText exports EBU-TT-D (EBU R133 compliant), TTML, IMSC1 (Netflix, Disney+, Canal+), STL (EBU STL 3264) and SCC (CEA-608 for the North American market). All professional broadcast formats are available from the Pro plan.

Q: Do you offer a real-time API (WebSocket)?

Yes. Pro and Scale plans include a REST API for programmable pull (filters by stream, period, language) and a WebSocket stream for real-time push delivery to your MAM, CMS, NLP systems or any third-party application.

Q: Can multiple streams be transcribed simultaneously?

Yes. Starter supports 3 simultaneous streams, Pro 10 streams, Scale unlimited. Public broadcast streams (TV, radio, HLS…) have no hour quota — transcription is continuous. The monthly hour quota applies only to private proprietary streams (studio, internal IPTV, uploaded files). Extra streams are available as an add-on on Starter and Pro.

Q: How does automatic language detection work?

OnAirText analyses the first seconds of each segment to automatically identify the spoken language. You can also force a language per stream to maximise accuracy on known monolingual content, especially for low-resource languages.

Q: What accuracy can I expect for French?

On standard French streams (national TV, national radio), the word error rate (WER) is below 8% under normal broadcast conditions. Accuracy varies with signal quality and content type. Live sports or multi-speaker debates will naturally be less accurate than a TV news bulletin.

OnAirText transcribes your TV and radio streams into structured, timestamped, exportable text — in real time — in every format the broadcast industry requires.

Early Access → Explore features ↓

< 2 sPro Latency

99Languages

13Export formats

onairtext — transcription live ● REC

20:14:32.1BFM TV"Le gouvernement a présenté ce soir

20:14:32.8BFM TVun plan de relance économique destiné

20:14:33.4BFM TVaux PME et TPE françaises, avec

20:14:34.0BFM TVune enveloppe de 4 milliards d'euros."

20:14:35.2France Inter[Détection automatique : fr-FR · conf. 98%]

20:14:36.0France Inter

Features

Everything broadcast
demands. Nothing less.

From ingest to subtitle, real-time API to legal archiving.

⚡

Real-time transcription

Structured, timestamped text delivered in under 2 seconds. Each segment is annotated with the stream name and exact timecode.

🌐

99 languages

Automatic language detection per stream. Force a language to maximise accuracy on known monolingual content.

📄

13 export formats

SRT, VTT, EBU-TT-D, TTML, STL, SCC, IMSC1, JSON, CSV, TXT, legal PDF, DOCX, DFXP — every professional broadcast format.

🔌

REST API & WebSocket

Programmable pull by stream, period and language via REST API. Real-time push delivery to your MAM, CMS and NLP systems via WebSocket.

📡

Multiple sources

DVB/TNT, HLS/DASH, RTMP/RTSP, FM/DAB+ Radio, file upload. Compatible with any existing broadcast infrastructure.

🗄️

Archiving & auto-export

Automatic delivery to SFTP, S3, Google Cloud Storage or Azure Blob at the end of each broadcast. Retention up to 5 years on Scale.

🔗

Integrations

Slack (Teams, Google Sheets, Zapier, Make in progress) — automatic transcript sync into your existing tools.

🔒

Data ownership

The client retains full ownership of all transcriptions. No secondary use whatsoever.

📊

Live dashboard

Real-time visualisation of transcribed text with timestamps and per-segment confidence indicator.

Input Sources

All your streams.
One platform.

OnAirText natively ingests all standard broadcast sources with no complex network configuration.

📺

DVB-T/T2/S · TNT

📻

Radio / DAB+

SDR · RDS · DAB+

🌐

OTT / WebTV streams

HLS · DASH · M3U8

📡

Enterprise live

RTMP · RTSP · IPTV

📁

File upload

MP3 · MP4 · WAV · MKV

Export Formats

13 formats.
From editing to legal.

Every professional subtitling and transcription format, from European broadcast standards to editorial use cases.

.srt

SubRip

YouTube, Vimeo, video editing

.vtt

WebVTT

HTML5, OTT, web accessibility

.ttml

EBU-TT-D / TTML

European broadcast, EBU R133

.xml

IMSC1

Netflix, Disney+, Canal+

.stl

STL

Terrestrial TV broadcast, EBU 3264

.scc

SCC / CEA-608

North American broadcast

.cap

CAP

Institutional SDH archiving

.json

JSON

APIs, third-party systems, NLP

.csv

CSV / Excel

Reports, post-production

.txt

Plain text

Editorial, LLM input, copy-paste

.pdf

PDF

Legal archiving, broadcast proof

.docx

Word

Review, editing, manual subtitling

.dfxp

DFXP

Legacy Flash, legacy archiving

Pricing

Transparent,
no surprises.

Monthly or annual billing. −15% on annual subscription.

Monthly Annual −15%

📡

Unlimited public broadcast streams on all plans

TV, radio, DVB/TNT, public HLS/DASH, RTMP broadcast — no hour counting, continuous 24/7 transcription.

The monthly hour quota applies only to your private proprietary streams: internal studio, enterprise IPTV, uploaded files.

Starter

PR agencies · Brands · Productions

^€13.6

/ month · no commitment

✓ 3 simultaneous streams
✓ Public broadcast streams · unlimited
✓ 200 h/month · private proprietary streams
✓ SRT, VTT, TXT, CSV export
✓ Live dashboard
✓ 30-day archive retention
✓ 2 users
✓ REST API / WebSocket
✗ Auto SFTP / S3 export

Get started →

Pro

Media · Institutions · Studios

^€59.9

/ month · no commitment

✓ 10 simultaneous streams
✓ Public broadcast streams · unlimited
✓ 1,000 h/month · private proprietary streams
✓ All export formats
✓ Live dashboard
✓ 1-year archive retention
✓ 10 users
✓ REST API + WebSocket
✓ Auto SFTP / S3 export
✓ Slack, Sheets, Zapier

Get started →

Scale

Media groups · Regulators · OTT

Custom quote

Custom contract · Guaranteed SLA

✓ Unlimited streams
✓ Unlimited hours · all stream types
✓ All formats + custom formats
✓ 5-year+ retention
✓ Unlimited users
✓ Dedicated CSM + SLA
✓ All integrations

✓ Extra hours (private streams): €0.05/h (Starter) · €0.03/h (Pro) · ✓ Extra streams: €8/stream/month (Starter) · €6/stream/month (Pro)

Available add-ons

AI summaries per programme +€60/month — automatic end-of-broadcast summary

Legal archiving PDF +€40/month — signed, timestamped PDF with integrity hash

Extended retention +€30/month per additional 6-month block

Global coverage

supported languages

Automatic language
detection.

OnAirText automatically identifies the spoken language on each stream. You can also force a language per stream to maximise accuracy on known monolingual content.

From French to Yoruba, from Arabic to Japanese — 99 languages covering the world's major broadcast markets.

AfrikaansAlbanianAmharicArabicArmenianAssameseAzerbaijaniBashkirBasqueBelarusianBengaliBosnianBretonBulgarianBurmeseCatalanChinese (Simplified)Chinese (Traditional)CroatianCzechDanishDutchEnglishEstonianFaroeseFinnishFrenchGalicianGeorgianGermanGreekGujaratiHaitian CreoleHausaHawaiianHebrewHindiHungarianIcelandicIndonesianItalianJapaneseJavaneseKannadaKazakhKhmerKoreanLaoLatinLatvianLingalaLithuanianLuxembourgishMacedonianMalagasyMalayMalayalamMalteseMaoriMarathiMongolianNepaliNorwegianNynorskOccitanPashtoPersianPolishPortuguesePunjabiRomanianRussianSanskritSerbianShonaSindhiSinhalaSlovakSlovenianSomaliSpanishSundaneseSwahiliSwedishTagalogTajikTamilTatarTeluguThaiTibetanTurkishTurkmenUkrainianUrduUzbekVietnameseWelshYiddishYoruba

Technical FAQ

Frequently asked questions

What is the actual transcription latency?

Latency is under 2 seconds between broadcast and text delivery.

Which broadcast streams can you ingest?

OnAirText supports terrestrial TV (DVB-T/T2/S / TNT), HLS and DASH streams for webTV and OTT platforms, RTMP and RTSP for enterprise live and IPTV, FM and DAB+ radio, and uploaded files (MP3, MP4, WAV, MKV, AAC) for deferred processing.

Who owns the transcriptions?

The client retains full ownership of all transcriptions. OnAirText claims no rights over produced data and does not use it for any secondary purpose.

Does OnAirText support EBU-TT and STL broadcast formats?

Yes. OnAirText exports EBU-TT-D (EBU R133 compliant), TTML, IMSC1 (Netflix, Disney+, Canal+), STL (EBU STL 3264) and SCC (CEA-608 for the North American market). All professional broadcast formats are available from the Pro plan.

Do you offer a real-time API (WebSocket)?

Yes. Pro and Scale plans include a REST API for programmable pull (filters by stream, period, language) and a WebSocket stream for real-time push delivery to your MAM, CMS, NLP systems or any third-party application.

Can multiple streams be transcribed simultaneously?

Yes. Starter supports 3 simultaneous streams, Pro 10 streams, Scale unlimited. Public broadcast streams (TV, radio, HLS…) have no hour quota — transcription is continuous. The monthly hour quota applies only to private proprietary streams (studio, internal IPTV, uploaded files). Extra streams are available as an add-on on Starter and Pro.

How does automatic language detection work?

OnAirText analyses the first seconds of each segment to automatically identify the spoken language. You can also force a language per stream to maximise accuracy on known monolingual content, especially for low-resource languages.

What accuracy can I expect for French?

On standard French streams (national TV, national radio), the word error rate (WER) is below 8% under normal broadcast conditions. Accuracy varies with signal quality and content type. Live sports or multi-speaker debates will naturally be less accurate than a TV news bulletin.

Broadcast
to text.
In under 2 s.

Everything broadcast
demands. Nothing less.

Real-time transcription

99 languages

13 export formats

REST API & WebSocket

Multiple sources

Archiving & auto-export

Integrations

Data ownership

Live dashboard

All your streams.
One platform.

13 formats.
From editing to legal.

Transparent,
no surprises.

Available add-ons

Automatic language
detection.

Frequently asked questions

Let's discuss
your infrastructure.

Request received!

Broadcastto text.In under 2 s.

Everything broadcastdemands. Nothing less.

Real-time transcription

99 languages

13 export formats

REST API & WebSocket

Multiple sources

Archiving & auto-export

Integrations

Data ownership

Live dashboard

All your streams.One platform.

13 formats.From editing to legal.

Transparent,no surprises.

Available add-ons

Automatic languagedetection.

Frequently asked questions

Let's discussyour infrastructure.

Request received!

Broadcast
to text.
In under 2 s.

Everything broadcast
demands. Nothing less.

All your streams.
One platform.

13 formats.
From editing to legal.

Transparent,
no surprises.

Automatic language
detection.

Let's discuss
your infrastructure.