Subtitling · 60+ Languages
AI-timed subtitles drafted in minutes, reviewed by native linguists — delivered in SRT, VTT, TTML and more. Frame-accurate, reading-speed optimised, broadcast-ready.
Rian subtitling is an enterprise captioning and subtitling service that pairs AI drafting with native human review. We transcribe, translate, time, and QC captions for your video in 60+ languages, then deliver them in every standard format your pipeline expects. Cues are frame-accurate, reading speeds stay within broadcast limits, and closed captions carry the speaker labels and SDH metadata platforms require.
We export to all major subtitle and caption standards — no conversion steps needed on your end.
SubRip Text — the universal interchange format, supported by every NLE and platform.
WebVTT — HTML5 native, used by browsers, OTT players, and DASH/HLS streams.
Timed Text Markup Language — SMPTE-TT & EBU-TT compliant for broadcast delivery.
Scenarist Closed Caption — broadcast-standard CEA-608 for US cable and streaming.
AI drafts and times the captions; native linguists review every cue for accuracy and reading speed. Under the hood:
In and out cues set to the millisecond, synced to speech onset and silence — never a beat early or late.
Draft subtitles for any major language in one pass, with the source transcript auto-detected.
Every line checked against broadcast reading-speed standards (17 cps default, configurable). No audience left behind.
Native linguists review timing, breaks, and translation accuracy, with sign-off before delivery.
Closed captions with speaker labels, sound effects, and SDH metadata — ready for platform compliance.
A managed pipeline takes your video from source through to verified, delivery-ready captions in five stages.
We transcribe and force-align speech to the timeline with word-level timestamps, even for noisy audio.
Script translated and line-broken for reading speed. Idioms adapted — not just transliterated.
In/out cues set per broadcast standard. Shot changes, music cues, and silence respected.
A native linguist checks every cue for accuracy, timing, and line breaks before export.
Files exported in all requested formats, via API delivery or dashboard download. Revisions included.
Broadcast, OTT, corporate, and social video — captioned in 60+ languages for teams shipping across formats and markets.
MP4, MOV, MXF, AVI, and most broadcast containers. You can also upload a transcript or SRT file and we'll re-time or translate it.
Cues are set to ±100ms accuracy. We use force-alignment for word-level timestamp extraction, validated against the picture in a QC pass.
Yes. Upload your SRT and a target language — we'll translate and re-time for the new language's reading pace.
We deliver soft subtitles in all standard formats. Burned-in (open captions) rendering is available on request for social and OTT delivery.
Closed captions include speaker labels by default. For scripted content, we use dialogue lists to assign roles accurately.