The Stellar suite

• Start from scratch or import existing subtitle files or scripts

• Edit directly in industry-standard subtitle formats (like .srt, .stl, .itt, Pac, 890, IMSCR, Cap to lost, and more)

• Fine-tune timing and positioning with frame accuracy

• Auto-align scripts to audio using smart automation tools (optional, but powerful)

• Preview in real-time with full video sync for confidence before delivery

• Convert seamlessly between a wide range of subtitle file formats

• Intelligent re-splitting, instantly convert subtitle files between different styles – DVB to Teletext

Create precise, high-quality subtitles and captions with a comprehensive toolset designed for efficiency.

• Edit with confidence – view subtitles directly over video, as text blocks, and on the timeline

• Full suite of editing tools for timing, text, and style profiles

• Adjust timing with frame-level accuracy

• Easily split or merge subtitle segments

• Built-in spell checkers and custom dictionaries for all major languages

• Precise positioning & justification – vertical and horizontal controls at your fingertips

• Format your style – support for Open, DVB, Teletext, and Closed Captions

Built for professionals who need flexibility, speed, and total creative control.

• Auto-transcribe audio with cutting-edge speech-to-text – create subtitles or transcripts in seconds

• Turn untimed scripts into timed subtitles using AI-powered alignment and subtitle splitting

• Generate draft translations instantly with machine translation

• Speed up QC – use machine translation to quickly verify subtitle content across multiple languages

• Detect on-screen text like captions or banners and automatically reposition your subtitles for perfect readability

Save time, boost accuracy, and let AI handle the heavy lifting — so you can focus on the creative.

• Ready-to-use style profiles for subtitle layout, styling, and timing rules

• Centralized style profile management – update once, apply everywhere

• No more sending files – style profiles are instantly available to all users

• Assign multiple style profiles with powerful, flexible control for different formats or clients

Streamline your workflow, maintain brand consistency, and deliver with confidence — every time.

• Supports virtually all languages and script systems worldwide (including Japanese vertical presentation and rubies)

• Work with multiple language files side by side — all in one project

• Check and sync timing across languages with ease

• Conform all versions simultaneously to match video edits

• Powerful retiming tools make global versioning fast and stress-free

Deliver accurate, synchronized subtitles in every language — faster than ever.

The Stellar Suite is protected by TPN Gold Shield certification, meeting the highest industry standards for media security.

• Advanced encryption (MediaSeal) keeps your content protected at all times

• Industry-standard DRM (Widevine) ensures secure digital rights management

• Watermarking and two-factor authentication add layers of defense

• Audit trail access gives you full transparency and control over your media

Stellar Suite keeps your content safe — from production to delivery.

• Write from scratch or start with an existing script – your workflow, your choice

• Edit and time your script with frame-level precision

• Use smart automation to find ideal gaps in dialogue for audio description

• Preview your script perfectly synced with the video

• Full ESF file support – import, edit, and export with ease

From creation to final delivery, streamline your AD scripting process like never before.

Created for professional Audio Description artists and recording engineers, and developed in collaboration with industry experts to meet real-world production needs.

• No specialist equipment required — just connect your mic to your PC or Mac, launch Stellar for AD in Chrome, and you’re ready to go.

• Record with precision using Wipe or Scrolling text prompts

• Countdown-to-record for perfect cueing

• Customize text size, speed, and style to suit your workflow

• Multiple takes with trim, slip, and auto-alignment for smooth performance

• Mute/unmute takes and compare easily

• Loop and punch-in recording for fast retakes

• Graphical fade tools to set and edit program audio fades

• Review your audio perfectly synced with program audio and video

Stellar for AD gives you studio-grade control — right in your browser.

Bring your scripts to life using AI-powered voiceovers and synthetic AD – no studio required.

• Access 4,000+ high-quality voices

• Support for 80+ languages and dialects

• Mix and match voices in a single file for ultimate flexibility

• Blend human and synthetic audio seamlessly

• Create, share and save favourites for quick access to your go-to voices

• Powered by leading web-based voice services

Perfect for fast-turnaround projects, global versions, and scalable voiceover production — all from your browser.

Deliver your project the way you need it with a variety of output options.

• Mix in different audio styles – with or without program audio
• Add AD directly to MP4, MXF media files for seamless integration
• Package your Audio Job as a single zip file, including the script and all audio files
• Export as a ProTools Project file for high-level editing and production

Whether you’re delivering for broadcast, streaming, or post-production, Stellar makes it easy to provide exactly what your clients need.

• Supports virtually all world languages and script systems
• Work with multiple language files simultaneously — no need to switch between projects
• Easily check and sync timing across different languages
• Conform all languages at once to match video edits effortlessly
• Powerful retiming tools simplify the process of aligning multiple versions

Stellar’s spoken subtitles offer a game-changing solution for visually impaired users and those accessing foreign language content.

• Convert subtitle text into clear spoken audio with human or synthetic voices
• Automatically dip program audio to reduce foreign language dialog for better clarity
• Mix spoken subtitles with program audio for a seamless, accessible track
• Rapidly generate spoken subtitles to enhance user experience and inclusivity

Make your content accessible to a broader audience with Stellar’s advanced spoken subtitle technology

The Stellar Suite is protected by TPN Gold Shield certification, meeting the highest industry standards for media security.

• Advanced encryption (MediaSeal) keeps your content protected at all times

• Industry-standard DRM (Widevine) ensures secure digital rights management

• Watermarking and two-factor authentication add layers of defense

• Audit trail access gives you full transparency and control over your media

Stellar Suite keeps your content safe — from production to delivery.

• Instant video and audio synchronization for a flawless workflow
• Full control over voice talent audio levels and settings from anywhere
• Instant script updates – changes are reflected immediately for all users
• Integrated intercom with level and mute controls for smooth communication
• Record one or many voice artists in a single session, even from different locations
• Collaborate across multiple sessions working on the same script
• Sync recorded audio effortlessly between sessions for consistency
• Support for 128 audio tracks (4 stereo or 8 mono) for flexible recording options
• Restart sessions in seconds – fast, responsive, and efficient

Perfect for remote teams, voice talent, and studios who need seamless, high-quality collaboration from anywhere.

Minimize Costs, maximize efficiency – Remote and hybrid working made easy

• Eliminate travel time – collaborate from anywhere, saving valuable time
• Cut physical studio costs – no need for expensive in-person setups
• Set up or resume sessions in moments – get started faster, keep projects moving
• Hybrid working flexibility – voice artist and engineer in the studio, director and script editor joining remotely
• Industry-standard DAW hotkeys – streamline your workflow with familiar, efficient controls

Ideal for teams looking to optimize production costs and streamline their remote and hybrid workflows.

• Full control over script editing and adaptation – adjust content to fit your needs
• Rythmoband display over or under the video for perfect timing and synchronization
• Customize text size, speed, and style for full creative control
• Multiple takes with trim and slip – perfect every line and ensure smooth delivery
• Loop and punch-in recording for fast, efficient retakes and flawless performance

Create a clean music and effects track with AI-powered dialog removal, allowing for professional dubbing without affecting original dialogue. This feature simplifies the creation of high-quality, dubbed content.

Work with professional voice artists or choose from over 4,000 high-quality synthetic voices across 80+ languages. Tailor voice performance with adjustable pitch, speed, and style, and use advanced features like voice morphing, emotion transfer, and dialogue removal to enhance realism and flexibility. Easily manage voice preferences and phonetic spellings for consistent, accurate pronunciation.

• Mix to a variety of audio styles – tailor your sound for any project
• With or without program audio – flexibility to suit your needs
• Add AD directly to MP4, MXF media files for quick integration
• Deliver an audio job as a single zip file – includes script and all audio files for easy access
• Output as a ProTools Project file – perfect for professional editing and post-production

• Supports nearly every language and script system worldwide
• Open multiple language files simultaneously for streamlined workflow
• Check and sync timing across languages with ease
• Conform all languages at once to match video edits in real-time
• Powerful retiming tools simplify the process of aligning multiple language versions

The Stellar Suite is protected by TPN Gold Shield certification, meeting the highest industry standards for media security.

• Advanced encryption (MediaSeal) keeps your content protected at all times

• Industry-standard DRM (Widevine) ensures secure digital rights management

• Watermarking and two-factor authentication add layers of defense

• Audit trail access gives you full transparency and control over your media

Stellar Suite keeps your content safe — from production to delivery.

Stellar includes an automated tagging engine that scans media for:

• Profanity and offensive language
• Sexual references or nudity
• Violence and abuse
• Substance use
• Hate speech and slurs

Each flagged instance is logged with timecodes and confidence levels, so human reviewers can validate or override.

• Compliance metadata exports (JSON, XML, CSV)
• Auto-generated edit decision lists (EDLs)
• On-screen warning indicators in the interface

Empower your QC teams

While AI covers the bulk of detection, trained QC professionals can:

• Confirm, modify, or dismiss automated tags
• Add context-specific tags based on client requirements
• Apply market-specific compliance labels (e.g. ESRB, PEGI, BBFC)
• Annotate content with notes for editors or legal reviewers
• Add Break markers for possible advert insertion points

Reviewer interface features:

• Side-by-side video playback and waveform view
• Timecode-linked comment threads
• Multi-language support for foreign-language review

Built-in QC checks for every stage

• Subtitle and caption QC: spelling, timing, readability
• Audio QC: missing clips, text edit after recording warnings
• Format and delivery validation: EBU, FCC, OTT specs

Automated + manual hybrid workflows

• Flag issues automatically
• Assign for manual review with contextual instructions
• Track issue resolution across steps

Deliver confidently, every time Stellar generates exportable compliance and QC reports. Reports include:

• Summary of flagged issues
• Actions taken (auto or manual)
• Reviewer annotations
• Timestamped logs for audit trail

• Add any Stellar user with just their email address – quick and simple

• Set user access levels – Admin, Manager, or User to match roles

• Configure security levels to protect sensitive content and workflows

• Assign tasks to one or multiple users for streamlined collaboration

• Public Task System – accessible to all Stellar users, enabling global collaboration
• Assign work to any Stellar user, no matter where they are
• Easily upload tasks and media for quick distribution and workflow management
• Private Task System – exclusive for Enterprise clients, ensuring secure, tailored collaboration

Perfect for teams of all sizes, from global freelancers to large enterprises, looking for efficient task management and seamless collaboration.

• Create new tasks in Stellar with ease – streamline project management
• Upload to public or private task systems – flexibility to suit your needs
• Cloud storage on AWS S3 – reliable and scalable storage for all your media
• Set media security levels – ensure your content is protected at all times
• Watermarking – secure your media with custom watermarks
• Encryption – industry-standard encryption to keep your content safe
• Range of security and encryption systems supported – flexibility for your security needs
• Second-factor authentication – added layer of protection for sensitive content

• Tasks appear in the user’s Task list – organized and easy to manage
• Download tasks directly for quick access
• Track progress in real-time as work is completed
• Mark tasks as complete with a simple “Completed” flag for clear status updates

• Connect third-party workflow solutions via comprehensive APIs.
• Import tasks from existing systems for seamless project management.

• Centralized project management for localization workflows.
• Manage style profiles, layouts, fonts, dictionaries, glossaries, and toolbars for consistency.

Instantly ensure your files are in the right format, perfectly synced, and meet industry standards, eliminating the need for time-consuming manual adjustments.

Stellar thoroughly scans your files for issues like timing errors, formatting problems, and missing content. It instantly generates detailed error reports, so you can address issues before they become problems.

Tailor your checks to match the specific needs of your project. Whether it’s line length, timing accuracy or speaker identification, Stellar lets you focus on what matters most.

Say goodbye to extensive manual reviews. Stellar’s automation dramatically cuts down on the number of assets requiring human inspection, saving time and resources.

With fewer errors and faster turnarounds, you’ll see a significant reduction in file rejections and costly re-deliveries, making your workflow more efficient than ever.

Stellar makes it simple to convert between any subtitle and caption file format, ensuring your content is ready for every platform and delivery method. Whether you’re working with text-based files or need image-based subtitles for DVD/BD, Stellar has you covered.
Key features include:
• Seamless File Format Conversion: Easily convert between all major subtitle and caption formats to meet the needs of different platforms and delivery requirements.
• Image-Based Subtitles for DVD/BD: Generate image-based subtitles for DVD and Blu-ray formats, ensuring compatibility with physical media standards.
• Full Industry Standard Support: Stellar supports all industry-standard formats, providing a versatile solution for any project, no matter the format.

With Stellar, adding open captions or subtitles to your videos has never been easier. Whether you’re working with MP4, MOV (h.264), ProRes HQ, or other industry-standard broadcast formats such as DVB and Teletext. Stellar Convert gives you everything you need to seamlessly integrate captions into your videos with just a few clicks.
Key features include:
• Burn Captions/Subtitles with Ease: Effortlessly render captions or subtitles directly onto your video, ensuring a smooth, professional finish every time.
• Encode to broadcast formats: Create broadcast ready content in DVB, Teletext and CC 608/708 formats.
• Wide Format Support: Import and work with all major subtitle and caption file formats, making compatibility issues a thing of the past.
• Match Resolution & Frame Rate: Render subtitles on video while maintaining the exact resolution and frame rate for a flawless viewing experience.
• Multiple Video Presets: Choose from various video presets, including popular options like h.264 and ProRes, to ensure optimal quality for your project.
• Full Control Over Styling, Fonts & Positioning: Customize subtitle styling and positioning to match your brand or project’s unique look and feel.
• Trim Video to Perfection: Trim your video with precision, ensuring your final product is exactly what you need.

Blueprints for Process Automation:
• Design automated sequences (Blueprints) to handle repetitive tasks using AI and automation.
• Automate subtitle drafting, audio description creation, and task generation.
• Trigger Blueprints manually, via folder drop, or API calls—supports bulk file processing.
• Use pre-built Blueprints or create custom ones tailored to your needs.

Smart Task Management:

• Tasks follow predefined workflows based on content type (e.g., captions vs. multilingual subtitles)

• Ensure accuracy, consistency, and speed across all projects

• Speech-to-Text (ASR): Draft subtitles, align captions, detect gaps for audio description.
• Machine Translation: Generate multilingual subtitles, validate translation.
• Text-to-Speech (Synthetic Voices): Create AD, voice-over, and dubbing files.
• Voice Morphing: Modify voices or create custom ones.
• Respeeching: Re-record dialogue for cleaner, synchronized audio.
• OCR: Extract text from images and video frames for subtitling.
• Dialogue Removal: Generate music & effects (M+E) tracks for professional dubbing.
• Dialogue splitting: Separate character lines for easier dubbing and mixing.
• Subtitle splitting: Break down long subtitles for improved readability and timing.

• Video Transcoding: Convert video formats with DRM encryption.
• Audio Mixing: Produce AD, VO, and dubbing in professional formats.
• Subtitle Rendering & Encoding: Generate subtitle outputs in multiple formats.
• Synthetic Voice Rendering: Automate text-to-speech for spoken subtitles.
• File Format Conversion: Support for all professional subtitle/caption formats.
• Automated QC & Conforming: Ensure subtitle accuracy with EDL-based conforming.
• Task Duplication: Create language-specific tasks with machine translation & user assignment.