ISO 17100 CERTIFIED · SAME-DAY TURNAROUND
Media Localisation Services for Video and Audio
Media localisation services for video and audio: subtitle, dubbing, voice-over and multilingual multimedia localisation under ISO 17100 across 200+ languages.
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What are media localisation services for video and audio?
Media localisation services for video and audio are the end-to-end adaptation of multimedia content — translating dialogue, recording dubbing or voice-over, timing subtitles, replacing on-screen text and meeting UK accessibility rules — so video or audio reads as native in each target language.
What is the difference between subtitling, dubbing and voice-over for video and audio?
Subtitling adds timed translated captions capped at 17 characters per second on screen; dubbing replaces the original dialogue with lip-synced voice acting in the target language; voice-over records translated narration over the original audio at reduced volume, common in documentary, e-learning and corporate content.
How does the media localisation process work for video and audio content?
The media localisation workflow runs in 7 stages: source-file intake, transcription, script translation with translation memory, ISO 17100 revision, recording or subtitle timing, quality assurance against target-language reading-speed and lip-sync rules, and delivery in the requested media format.
Can I upload a video to have it translated and localised?
Yes — a video can be uploaded through the secure quote form in MP4, MOV, MXF, WAV or MP3 up to 5 GB per file; the London team returns a fixed GBP quote within 2 working hours, covering transcription, translation, subtitling, voice-over or full dubbing under NDA and ISO 27001-aligned data handling.
How much do media localisation services for video and audio cost in the UK?
Media localisation in the UK is priced per audio minute: subtitling from £8 per minute per language, voice-over from £45 per minute per language, and full lip-synced dubbing from £120 per minute per language, all under ISO 17100 with a same-day rush surcharge of 25–50% for delivery inside 24 hours.
What are the benefits of localising video and audio content?
There are 6 measurable benefits of localising video and audio content: expanded global audience reach across 200+ languages, higher engagement and watch-time, brand consistency across markets, UK and EU accessibility compliance, improved multilingual SEO on video platforms, and higher conversion on training and marketing assets.
Media localisation services for video and audio adapt multimedia assets — video, audio, on-screen text and access services — so each language market receives a native-feeling experience under ISO 17100 quality control. This page positions video and audio localisation as a sub-discipline of Website Localization, delivered from London across 200+ languages for UK and global-facing brands.
What are media localisation services for video and audio?
Media localisation services for video and audio are the end-to-end adaptation of multimedia content — translating dialogue, recording dubbing or voice-over, timing subtitles, replacing on-screen text and meeting UK accessibility rules — so video or audio reads as native in each target language. The scope covers audio and video content from a 30-second social ad to a 90-minute documentary.
The London workflow combines four disciplines in one delivery:
- Transcription — timecoded source script from the original audio.
- Translation — script translation with translation memory, revised under ISO 17100.
- Recording or timing — voice-over, full dubbing or subtitle spotting.
- Quality assurance — linguistic revision, technical checks, master-file delivery.
Read the child explainer for a deeper walk-through: What is media localization and how does it work?.
How do media localisation services differ from plain translation?
Media localisation services layer cultural, timing, unit, currency and regulatory adjustments on top of translation, so a UK training video becomes a native German training video rather than a subtitled English one. Translation is one step inside the wider localisation workflow. The full distinction is covered here: Media Localization vs Media Translation: What Is the Difference?.
Which video and audio assets qualify as multimedia content?
Multimedia content covers social media videos, corporate explainers, e-learning modules, podcasts, webinars, marketing ads, product demos, training materials, documentary audio and broadcast programmes — any asset combining moving image, spoken audio or on-screen text. Every asset class enters the same ISO 17100 pipeline with format-specific quality gates.
What is the difference between subtitling, dubbing and voice-over for video and audio?
Subtitling adds timed translated captions capped at 17 characters per second on screen; dubbing replaces the original dialogue with lip-synced voice acting in the target language; voice-over records translated narration over the original audio at reduced volume. The three services differ in cost, turnaround and platform fit.
When is subtitling the right choice?
Subtitling suits social media videos, corporate content, film festivals and accessibility compliance where preserving the original audio matters and budget is tighter. Deliverables land as SRT, VTT, EBU-STL or TTML timed to a 17 characters-per-second reading-speed limit. Subtitle translation also feeds video SEO, because search engines index text, not audio. See the child service page: Subtitling & Video Translation Services.
When is dubbing the right choice?
Dubbing suits broadcast drama, children’s animation, high-value marketing and markets with low subtitle-reading tolerance such as Germany, France, Spain and Italy. Lip-sync accuracy, casting sessions and studio recording put dubbing at the highest-cost tier of media localisation. Aligning translated speech with visible mouth movements is the defining technical constraint.
When is voice-over the right choice?
Voice-over suits e-learning modules, corporate training videos, documentaries, product tutorials and podcasts where translated narration sits over reduced original audio. It balances cost, speed and clarity without the lip-sync overhead of full dubbing. Voice-over is often the default for training materials and audio and visual content in enterprise learning stacks. See the child page: Voice-Over.
How do subtitling, dubbing and voice-over compare at a glance?
The three services differ across cost, turnaround, lip-sync, deliverable format, best use case and accessibility fit — the table below summarises how each maps to a typical UK video or audio project.
| Service | Start price (GBP / finished minute) | Typical turnaround | Lip-sync | Deliverable format | Best use case | Accessibility fit |
|---|---|---|---|---|---|---|
| Subtitling | From £8 | 1–3 working days | Not required | SRT, VTT, EBU-STL, TTML | Social, corporate, festivals | Ofcom, WCAG 2.2 |
| Voice-over | From £45 | 2–5 working days | Not required | WAV 48kHz, MP3, MXF | E-learning, documentary, training | Partial (pair with captions) |
| Full dubbing | From £120 | 5–15 working days | Required | WAV, MXF, AAF stems | Broadcast, animation, hero marketing | Full audio localisation |
How it works
How does the media localisation process work for video and audio content?
1
How does transcription start the localisation workflow?
Transcription converts the original audio into a timecoded source script, so linguists translate a locked reference rather than working from ear. It is the foundation for accurate translation, subtitle timing and voice-over recording. See the child page: Audio Transcription & Translation.
2
How is script translation adapted for on-screen and spoken delivery?
Script translation for media compresses dialogue to fit 17 characters-per-second subtitle limits or matches the syllable count of the original for dubbing lip-sync, using translation memory to keep terminology consistent across episodes, modules or campaign assets. The translation process reuses prior segments to hold voice and vocabulary steady.
3
How does recording and studio production run for dubbing and voice-over?
Studio production covers voice casting, director-led recording at 48 kHz WAV, engineering to broadcast loudness EBU R128 −23 LUFS, and delivery as WAV, MXF or AAF stems ready for the video editor. Voice talent is booked at three tiers:
- Junior — internal training, catalogue narration.
- Professional — brand videos, e-learning, documentary.
- Celebrity — hero marketing and broadcast drama, priced on quotation.
See the child page: Video Localization.
4
How is quality assurance run on localised media?
Quality assurance covers linguistic revision under ISO 17100 with three independent qualified linguists, on-screen text verification, subtitle reading-speed and line-length checks, lip-sync spot-checks and a final master-file review. WCAG 2.2 accuracy targets of 99%+ for synchronicity, completeness and placement apply to captions.
Can I upload a video to have it translated and localised?
Yes — a video can be uploaded through the secure quote form in MP4, MOV, MXF, WAV or MP3 up to 5 GB per file; the London team returns a fixed GBP quote within 2 working hours. Coverage spans transcription, translation, subtitling, voice-over or full dubbing under NDA and ISO 27001-aligned data handling.
Which video and audio file formats are accepted?
Accepted formats cover the common capture and delivery chain:
- Video: MP4, MOV, AVI, MKV, MXF, WebM.
- Audio: WAV, MP3, AAC, FLAC, M4A.
- Existing subtitles: SRT, VTT, EBU-STL, TTML, SCC, DFXP.
Anything outside this list is converted on intake at no extra cost.
How is data security handled for uploaded video and audio?
Uploaded video and audio sit on UK-hosted, encrypted servers under UK GDPR and ISO 27001-aligned controls, with per-project NDAs, role-based access and auto-deletion 90 days after delivery. Data security matters for pre-release marketing, financial results and clinical content.
Pricing
How much do media localisation services for video and audio cost in the UK?
Media localisation in the UK is priced per audio minute: subtitling from £8 per minute per language, voice-over from £45 per minute per language, and full lip-synced dubbing from £120 per minute per language, all under ISO 17100. A same-day rush surcharge of 25–50% applies for delivery inside 24 hours.
| Service tier | GBP per finished minute | Rush surcharge (under 24h) | ISO 17100 revision |
|---|---|---|---|
| Subtitle-only | From £8 | 25–50% | Included |
| Closed captioning | From £12 | 25–50% | Included |
| Voice-over (professional) | From £45 | 25–50% | Included |
| Dubbing (professional) | From £120 | 25–50% | Included |
| Dubbing (celebrity) | On quotation | Negotiated | Included |
See the pricing detail page: How much does media localization cost in London?.
What drives the price of subtitling, voice-over and dubbing?
Eight factors drive price:
- Target-language pair scarcity.
- Source-audio duration.
- Number of speakers.
- Voice-talent tier (junior, professional, celebrity).
- Studio time and engineering.
- On-screen text re-rendering.
- Deliverable format complexity.
- Turnaround urgency.
How much does a video translator cost per minute?
A video translator costs between £8 and £180 per finished minute in the UK depending on service tier — subtitle-only from £8, voice-over from £45, professional dubbing from £120, celebrity dubbing on quotation — all quoted in GBP under ISO 17100. The script translation stage runs at the ISO 17100 throughput benchmark of 1,500–2,000 words per linguist per day.
How is a multilingual media project quoted?
Multilingual projects are quoted on a per-language, per-minute grid with translation memory discounts of 20–70% on repeated content across episodes, modules or campaign variants. A 10-minute explainer across 5 languages typically lands between £1,200 and £6,500 depending on subtitle-only versus dubbed delivery.
Why us
What are the benefits of localising video and audio content?
How does localisation support accessibility compliance in the UK?
Localised subtitles, closed captions and audio description satisfy Ofcom’s Code on Access Services, the UK Equality Act 2010, WCAG 2.2 and the European Accessibility Act 2025. The European Accessibility Act takes effect on 28 June 2025, obliging consumer video services sold into the EU to include accessible localised media. UK regulatory triggers map to specific deliverables:
- Ofcom Code on Access Services — broadcaster subtitling, signing and audio-description quotas.
- European Accessibility Act 2025 — subtitles and audio description for consumer video services.
- BBFC classification — dubbed and subtitled versions submitted for age rating.
- ASA advertising rules — accurate localised claims in marketing ads.
See the sibling cluster: Multilingual UX Design for Localised Websites.
How does localisation grow reach on social media and streaming?
Localised subtitles and dubbed audio tracks unlock YouTube multi-language audio, LinkedIn caption search, TikTok in-market algorithms and Netflix Preferred Vendor spec delivery against the Netflix Timed Text Style Guide. One English asset converts into 5–30 native-market impressions per view. Deliverable formats map to platform:
| Format | Downstream platform |
|---|---|
| SRT, VTT | YouTube, Vimeo, LinkedIn, social |
| EBU-STL, TTML | UK and EU broadcast |
| TTML, DFXP | Netflix Preferred Vendor spec |
| WAV 48kHz, MXF, AAF | Broadcast, streaming, film |
| SCC, VTT | E-learning LMS platforms |
How do AI and human expertise combine in media localisation for video and audio?
AI and human expertise combine at three workflow stages: machine translation with translation memory drafts the script, professional ISO 17100 linguists revise for context, and AI voice cloning or human voice talent records the final audio. The split is chosen per asset by brand risk, budget and turnaround.
Where does machine translation and AI dubbing add value?
Machine translation and AI dubbing add value on high-volume, low-risk assets — internal training modules, user-generated captions, product-catalogue voice-overs and iterative social videos — where speed and cost matter more than performance nuance. Machine translation adoption grows at 6.3%–13.5% CAGR through 2033 as a complement to human ISO 17100 workflows.
Where does human expertise remain non-negotiable?
Human linguists, voice directors and voice actors remain non-negotiable for brand campaigns, broadcast drama, regulated (medical, legal, financial) content and any asset where cultural nuance, emotional performance or lip-sync accuracy affects revenue or compliance. ISO 17100 requires three independent qualified linguists at every linguistic stage.
AI voice or human voice — which should I choose?
Choose AI voice for scale (100+ modules, 20+ languages, weekly refresh cycles) and human voice for signature brand assets, regulated content and lip-synced dubbing. Many UK projects blend both, using AI for scale layers and human talent for hero content.
How do I choose a media localisation partner for my video and audio needs?
Choose a media localisation partner on 7 criteria: ISO 17100 certification, London or UK service base, transparent per-minute GBP pricing, in-house or vetted-studio voice talent across 200+ languages, translation memory and content management systems integration, data-security posture and named project management. Cross-link: Internationalization.
What are the top 5 questions to ask a media localisation company?
Ask these five before signing:
- Where is the ISO 17100 evidence — certificate, scope, expiry?
- How is voice talent sourced and auditioned across languages?
- Who owns the translation memory after delivery?
- What are the turnaround SLAs per service tier and language pair?
- How does the workflow integrate with our content management and video editing systems, and what is the GDPR posture?
See the sibling page: How do I find a professional media localization company in London?.
Can existing translations be reused or corrected on a new project?
Yes — existing subtitle files, dubbed audio or previously translated scripts are ingested into the translation memory, quality-checked against ISO 17100 revision, and reused with per-segment discounts. Brands are not billed twice for content already localised elsewhere.
Can the workflow integrate with existing content management and editing systems?
The London workflow integrates with WordPress, Drupal, Contentful, Adobe Premiere, Avid, Frame.io and major LMS platforms via API, webhook or watched folder. Subtitle and audio deliverables land in the format the video editor already uses.
Which media localisation services does the London agency deliver?
The London agency delivers 8 media localisation services under one ISO 17100 workflow: audio transcription, subtitle translation, closed captioning, voice-over, full dubbing, video localisation, on-screen text and graphics adaptation, and audio description — across 200+ languages with same-day turnaround on urgent packs. The full offer sits inside our Professional Translation Services in London, UK hub.
- Audio transcription — timecoded source scripts, foundation for translation and subtitle timing.
- Subtitle translation — SRT, VTT, EBU-STL, TTML at 17 characters per second.
- Closed captioning — captions with non-speech audio cues for accessibility and video-search SEO.
- Voice-over — translated narration recorded at 48 kHz WAV.
- Full dubbing — lip-synced replacement of the original dialogue.
- Video localisation — on-screen text, graphics and interactive elements adapted per market.
- On-screen text and graphics adaptation — After Effects and Premiere native re-renders.
- Audio description — narrated description of visual content for blind and visually impaired audiences, translated per market.
How is turnaround handled for London media localisation projects?
Turnaround runs same-day for under 10 minutes of audio placed before 11:00 GMT, 24–48 hours for a 15-minute corporate video in one language, and 3–5 working days for a 30-minute e-learning module across 5 languages, all against a 1,500–2,000 words-per-linguist-per-day ISO 17100 benchmark.
How do I get a quote for media localisation services?
Send the source video or audio file plus target languages and deadline through the London quote form; a fixed GBP quotation returns within 2 working hours, covering transcription, translation, subtitling, voice-over or dubbing, quality assurance and delivery format — no obligation, no auto-renewal. The four-step intake runs:
- Upload source file (MP4, MOV, MXF, WAV, MP3, up to 5 GB) with target languages and deadline.
- Receive fixed GBP quote inside 2 working hours, with turnaround and deliverable format confirmed.
- Approve NDA and purchase order; project management is named and single-pointed.
- Receive master deliverables in requested media formats, with translation memory retained for future reuse.
Frequently asked questions
What are the technical requirements for subtitle translation and localization?
Subtitle translation and localization requires adherence to strict timing, character limits, and file format standards to ensure readability and sync with audio. Industry-standard reading speeds typically fall between 17–21 characters per second, with each subtitle line capped at around 42 characters. Common delivery formats include SRT, VTT, STL, and EBU-TT, depending on the platform (e.g., Netflix, broadcast TV, or web). Professional agencies also ensure frame-rate accuracy, proper timecode synchronisation, and compliance with accessibility standards such as UK Ofcom subtitle guidelines.
How is cultural sensitivity handled in media localization?
Cultural sensitivity in media localisation is managed by using in-country linguists who understand local humour, idioms, taboos, and social norms — not just the target language. A professional translation agency assigns native-speaking specialists who adapt jokes, references, and culturally specific content so they resonate naturally with the target audience rather than causing offence or confusion. This process, known as transcreation, goes beyond word-for-word translation. It may also involve reviewing on-screen text, graphics, and voiceover scripts to flag anything that needs cultural adaptation before final delivery.
What industries use media localization services the most?
The industries that use media localisation services most heavily are entertainment, e-learning, corporate communications, marketing, and broadcasting. Streaming platforms and film studios rely on subtitle and dubbing services to reach global audiences, while e-learning providers localise training videos for multilingual workforces. In the UK, sectors such as legal, financial services, and healthcare also commission localised video content for compliance and public information purposes. Marketing and advertising agencies frequently require video and audio localisation to launch campaigns simultaneously across multiple European and international markets.
How does media localization support global content distribution?
Media localisation enables content owners to distribute video and audio across different countries and language markets without creating entirely new productions. By translating subtitles, dubbing voiceovers, and adapting on-screen text, a single piece of content can be made accessible to dozens of language communities — significantly reducing time-to-market. For UK-based businesses expanding internationally, professional localisation ensures that content meets regional broadcasting regulations, platform delivery specifications (e.g., Netflix Localization Guidelines), and cultural expectations, maximising audience engagement and return on content investment.