If you record tutorials, product demos, or online courses, adding captions boosts engagement, improves SEO, and makes your content usable for everyone. Search engines cannot watch your videos — but they can crawl a published transcript. And viewers who can't or won't turn on audio will stay engaged if they can read along.

Screen Studio handles all of this on-device with no subscriptions, no API keys, and no privacy trade-offs. Here is exactly how to set up and use the AI caption feature from start to finish.

🤔 1. What Makes Screen Studio's Caption System Different

Most screen recording apps either skip captions entirely or send your audio to an external cloud service for processing. Screen Studio takes a fundamentally different approach.

You also get a second option: Apple Speech Recognition engine. It works natively through macOS (requires macOS 26.0 or later) and processes transcripts entirely locally too. Both engines support multilingual video captions, so you can create subtitles in dozens of languages without third-party tools or paid subscriptions.

The key advantage over cloud-based tools like Otter.ai, Rev, or Descript's cloud transcription is clear: your audio recordings stay entirely on your device. For anyone working under NDA, recording internal product walkthroughs, or handling client data, this is a decisive advantage.

🛠️ 2. How to Enable Captions in Screen Studio

By default, captions are turned off. You need to activate them manually after recording. The process takes less than a minute once your recording is complete:

▶ Watch: Screen Studio's AI caption and subtitle generation in action — from recording to export

1. 1
   Open Screen Studio and Finish Your Recording

   Complete your screen recording as normal. Captions are generated from the finished recording, not during live capture — so record first, then add captions.

2. 2
   Go to Captions in Settings

   In the Screen Studio editor, navigate to the Captions panel in the right-side settings. The panel shows both AI engine options — Whisper AI and Apple Speech Recognition — along with model size and language selectors.

3. 3
   Choose Your Preferred AI Model

   Select Whisper AI and pick your model size (Base, Small, or Medium). If you're on macOS 26.0 or later and prefer the native approach, switch to Apple Speech Recognition. See Section 3 for detailed model guidance.

4. 4
   Select a Language or Leave on Auto-Detect

   Choose your recording language from the dropdown, or leave it on auto-detect. Auto-detect works well for single-language recordings. If your video switches between languages, manually specify the primary language for better accuracy.

5. 5
   Add an Optional Prompt for Custom Terms

   Type any brand names, product names, technical jargon, or proper nouns into the prompt field. This gives the AI context before transcription — dramatically improving accuracy on uncommon words. See Section 4 for full prompt guidance.

6. 6
   Click Generate Transcript and Wait

   Hit Generate Transcript. Processing runs entirely on your Mac. Progress is visible in the panel. Once complete, captions appear as an overlay in your video preview — ready to edit, style, or export immediately. ✅

🎯 3. Choosing the Right AI Model: Base, Small, or Medium

Screen Studio offers three Whisper AI model sizes. Each balances speed and accuracy differently — and the right choice depends on your recording type and hardware.

• Base model — Use for quick product demos under 5 minutes with clear microphone audio. Fastest processing; works great for straightforward narration with no technical jargon.
• Small model — The solid default for most screen recording use cases. Balances caption accuracy and speed well for tutorials, walkthroughs, and team video updates.
• Medium model — Highest accuracy but takes more time and storage. Ideal for long-form tutorials, online courses with complex technical vocabulary, or recordings with background noise or accent variation.

✍️ 4. Using Prompts to Improve Transcript Accuracy

One of Screen Studio's most underrated caption features is prompt support. Before generating a transcript, you can type custom words, brand names, or technical jargon into a prompt field. The AI uses this context to improve transcription accuracy on those specific terms.

When to Use Prompts

Add a prompt whenever your recording includes any of the following:

• Brand or product names — especially unusual spellings ("Loom", "Figma", "Vercel", "Supabase")
• Technical terminology — API endpoints, code libraries, framework names, command-line syntax
• Names of people or companies — Whisper will default to common name spellings without context
• Industry-specific acronyms — SaaS, LMS, CRM, CI/CD, REST, OAuth, etc.
• Non-standard pronunciations — words your AI engine consistently misrecognises from previous recordings

A small step before every generation saves a lot of manual editing time after. Once you've built a standard prompt for your niche (e.g., coding terms, marketing tools, course platform names), save it as a text snippet and paste it before each session.

✏️ 5. Editing and Fixing Captions After Generation

No AI transcript is 100% perfect — especially on technical content. Screen Studio gives you a built-in text editor to fix errors quickly without leaving the app.

Using the Built-In Transcript Editor

• Click Edit Transcript — opens a text editor showing all generated captions as editable text blocks
• Correct typos and misheard words — click any word to edit it inline; changes reflect immediately in the video preview
• Adjust caption timing — drag caption start/end points on the timeline to sync text to your speech exactly
• Hide captions from preview — toggle captions off without deleting them; useful for reviewing your recording before deciding on styling
• Resize and reposition — adjust caption font size and vertical position to match your branding or platform requirements

For creators who repurpose content across multiple platforms, resizing captions is essential. A caption that reads perfectly on a 16:9 YouTube video may overlap critical UI elements on a 9:16 vertical export. Always check caption positioning after switching aspect ratios.

📁 6. Exporting Transcripts as SRT Files

Screen Studio lets you export your generated transcript as a standalone .SRT file — the universal subtitle format accepted by every major video platform, CMS, and LMS.

What You Can Do With Exported SRT Files

Many content creators use exported transcripts as a starting point for newsletter content, show notes, and even e-books. One recording can fuel an entire content repurposing workflow — from the video itself to a blog post, a LinkedIn carousel, and an email newsletter — all from a single Screen Studio session.

▶ Watch: How to export SRT subtitle files from Screen Studio and upload to YouTube or your LMS

♿ 7. Making Videos Accessible With AI Captions

Video accessibility compliance matters more than ever in 2026. Regulations including WCAG 2.2 and ADA (Americans with Disabilities Act) standards require captions on published digital content in many regions. Failing to provide captions on course content or product demos can create legal exposure for businesses.

Who Benefits From Captions

Accessible video content doesn't just serve users with hearing impairments — it serves a much broader audience:

• Viewers in noisy environments — commuters, open offices, cafés watching without headphones
• Non-native English speakers — captions combined with auto-translate make your content globally accessible
• People with hearing impairments — estimated 1.5 billion people globally have some degree of hearing loss
• Mobile-first viewers — 80% of social video is watched on mobile, often on mute in public
• Learning-style preferences — many learners comprehend better when they can read along simultaneously
• Search engines — Google indexes caption text, making your video discoverable for long-tail queries

Screen Studio handles all of this without requiring a separate subtitle generator tool. One app, one workflow, full accessibility compliance on every recording.

📱 8. Optimising Captions for Social Media & Privacy

Social Media Caption Formatting

Short-form content on Instagram Reels, TikTok, and YouTube Shorts gets significantly higher engagement with on-screen text. Screen Studio supports vertical 9:16 video export with captions repositioned automatically, making it perfect for social platforms without any extra design work.

• ✅ Keep caption text large enough to read on small mobile screens — minimum 24pt equivalent at 1080p
• ✅ Use high-contrast text — white text with a dark drop shadow, or black text on white background strip
• ✅ Position captions in the lower third of the frame — never over important UI elements
• ✅ Match caption font style with your overall brand identity for visual consistency across platforms
• ✅ Check positioning after every aspect ratio change — 16:9 captions may overlap UI in 9:16
• ❌ Don't use light-coloured caption text on light backgrounds — unreadable on mobile in sunlight
• ❌ Don't position captions over face-cam overlay or important product UI elements

🔐 Why Local Processing Matters for Privacy

Many AI transcription tools — Otter.ai, Rev, Descript's cloud transcription, and others — send your audio recordings to remote servers for processing. Those audio files may be stored, used for model training, or accessible to employees under certain terms of service.

Enterprise teams and freelancers working under NDA will especially appreciate not having to worry about audio files sitting on someone else's server. Screen Studio gives you full control over recordings and transcripts at every stage — no third-party access, no data leaks, no surprises.

✅ AI Captions Quick Reference Checklist

• ✅ Add a custom prompt with product names and technical terms before every generation
• ✅ Choose Small model for most recordings — upgrade to Medium only for complex/noisy audio
• ✅ Always proofread the generated transcript before exporting
• ✅ Export .SRT and upload alongside every course lesson and YouTube video
• ✅ Publish a written transcript on your blog or course page for SEO benefit
• ✅ Check caption position after switching from 16:9 to 9:16 export
• ✅ Use exported transcript text for newsletter content and social posts
• ❌ Don't skip the manual review — AI accuracy is high but not perfect on technical terms

🚀 Get Started With Screen Studio Captions Today

Adding AI-powered subtitles to your screen recordings takes under five minutes with Screen Studio. Record your screen, enable captions, choose your AI model, add a prompt for your key terms, and hit generate. Edit any mistakes, adjust caption styling to match your brand, and export your .SRT file for platform upload.

Publishing on YouTube, embedding in a blog, uploading to your LMS, or sharing vertically on social — all become smoother and more professional with captions baked directly into your export.