02 / Subtitle Localization
Multilingual subtitles for training videos, e-learning, webinars and marketing content. From AI transcription to validated SRT/VTT files or video with burned-in subtitles.
We support translation agencies and LSPs throughout subtitle production. Your team handles translation and linguistic approval; we prepare materials, synchronization, technical validation and versions for review and publication.
Scope of support
Subtitle localization combines linguistic work with technical production. We prepare transcripts, translation files, timing, subtitle styles and review materials with full video context.
Automatic speech recognition speeds up video transcription and can reduce manual transcription costs. We verify the text against the audio and refine punctuation and segmentation. Names, numbers and terminology are agreed with your team before translation.
We check characters per line (CPL), reading speed in characters per second (CPS) or words per minute (WPM), line count and display duration. We adjust text breaks, speech synchronization, overlapping segments and gaps according to the project profile.
We turn continuous text without timecodes into subtitles by segmenting it and synchronizing it with the recording. We prepare SRT or WebVTT (VTT) files for translation in the agreed CAT tool. After import, we check identifiers, timecodes, target-text segmentation and timing.
We prepare an Excel (XLSX) review sheet with subtitle IDs, start and end times and text. Source, target and comment columns can be included. After review, we convert the approved table back to SRT/VTT and revalidate sequence, text and timestamps.
We select fonts, size, color, outline, shadow and position. We prepare ASS/SSA styles or burn subtitles in directly using Adobe Premiere Pro. A sample is submitted for approval. Burn-in is adapted to the resolution and framing so that subtitles remain readable and do not obscure important visuals.
We work in CaptionHub for collaboration in an agreed client environment, or locally in Subtitle Edit for subtitle preparation, synchronization and conversion. Tools and file handover are adapted to your workflow, permissions and material handling requirements.
Subtitle localization process
We can start with a video, existing subtitles or plain text without timecodes. We segment a supplied script or translation into subtitles and synchronize it with the recording. Scope, pricing and approval points are agreed before production.
Hover, focus or click to highlight the selected team’s responsibilities.
You provide the video, languages, existing subtitles, readability guidelines and delivery formats. You define the SME review scope.
We check video duration, audio quality and source materials. We agree transcription, timing, style, scope, cost and deadline.
You share a script or glossary where available. You approve names, terminology and any items requiring linguistic decisions.
We prepare and verify an AI transcript or work from supplied continuous text. We segment the content and add timecodes; existing SRT/VTT files can also be used.
Your team translates subtitles in SRT/VTT, a CAT tool, CaptionHub or an agreed Excel sheet and approves the target content.
We prepare files for translation. After importing the translation, we adjust segmentation and display duration and check readability parameters.
Your SME reviewer sees the complete material in Frame.io: visuals, audio and subtitles. They check content in context, easily comment on specific moments and approve subject-matter corrections.
We upload video with visible subtitles to Frame.io so that your SME has full context for review. We organize comments, implement approved corrections and share the next version.
You confirm linguistic approval, completeness of language versions and publication requirements for the target platform.
We revalidate timing, readability and files after corrections. We deliver SRT/VTT, an agreed spreadsheet or video with burned-in subtitles.
Subtitle review / Frame.io
Text alone does not show who is speaking, what happens on screen or what a term refers to. We therefore prepare a review version that lets your Subject Matter Expert (SME) assess subtitles in the full context of the video.
We share materials in an agreed Frame.io project, for example as a video with temporary burned-in subtitles. Reviewers comment on specific moments; we implement approved changes in the subtitle file and check the new version.
This approach supports subject-matter, terminology and contextual review of training, instructional and specialist video subtitles. An Excel sheet remains an alternative or a complement to video review.
Example feedback workflow
The Polish machine translation uses the masculine form “Wybrałem Dashboard”. In the video, the speaker is a woman pointing to an interface available only in English.
“The speaker is a woman: change it to the feminine form «Wybrałam». Keep Dashboard in English – the software has no Polish version yet.”
We correct the grammatical gender and retain the interface label. We check subtitle timing and readability, then submit the new version for SME approval.
Subtitle QA and readability
Before production, we agree maximum characters per line, line count, reading speed and display duration. Limits are adapted to the language, audience and publication platform. This gives the video a clear and appropriate set of subtitle checks.
We work against an agreed video edit. If the edit or recording duration changes, we assess the impact on subtitle synchronization and revision scope.
Deliverables
We prepare separate subtitle files, review materials or finished video. The quote covers agreed production work and final formats.
Synchronized target-language subtitles after technical validation and content approval. File naming and delivery are adapted to your project and platform.
SRT · VTT · agreed language versionsVideo with subtitle previews for SME review in Frame.io and/or an Excel sheet with text, timecodes and comments. After approval, we apply corrections to the subtitle file.
Review version · XLSX · conversion back to SRT/VTTA render with subtitles burned in using the approved font, contrast, position and margins. Subtitles become part of the image; a separate SRT/VTT is supplied where included in scope.
Style sample · ASS/SSA · agreed video exportExample scope
You have a recording and target languages. We prepare the transcript and source subtitles; your team translates the text. After adaptation and SME review, we deliver approved files or video versions.
Video + languages + guidelines
Translation + SME approval
Transcript + synchronized subtitles
SRT/VTT + agreed publication package
Materials for a quote
Subtitle localization questions
It can shorten transcription time and reduce its cost. Verification needs depend on audio quality, accent and terminology. We account for this in the quote and check AI-generated text before translation.
Yes. We can start with existing subtitles and handle adaptation, synchronization, technical validation and preparation for review or publication. Translation and linguistic approval remain with your team.
Yes. We prepare an agreed template with IDs, timecodes and text. Reviewers use designated correction columns. We then import approved changes and check the resulting SRT/VTT file.
The reviewer watches a version of the video with visible subtitles and comments on specific moments. This allows them to assess text alongside visuals and audio. We implement approved feedback and submit a new version for approval.
We agree limits for the language, audience and publication channel. Validation can include CPL, CPS/WPM, line count and display duration. We also check final readability in the video preview.
A separate file is a text track displayed by a compatible platform. Burned-in subtitles are permanently part of the image. We agree burn-in styles and separate delivery formats according to the intended use.
We offer in-house linguistic verification in Polish and English. For other languages, we prepare materials for the client’s designated reviewer or SME, either as text or as video with temporary subtitles in Frame.io.
Contact
Send the video or a recording link, existing subtitles, target languages and deadline. We will define transcription, subtitle localization, SME review and delivery formats and prepare a quote.
A good subtitle workflow accounts for text, timing and video context. We can start with a recording, script or existing subtitle file and prepare it for translation, SME review and publication.
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