Vidulk is an AI-powered mobile app for iOS and Android that turns long videos and audio into viral short-form clips. It also includes an AI image studio and professional caption editor.

How does AI clip detection work?

Import a video or paste a link — Vidulk transcribes the audio using AI speech recognition that supports 99 languages, then analyzes the transcript to find the most engaging moments. Each clip is scored by virality potential and categorized as Insight, Story, Funny, Tactical, Controversial, or Emotional.

What languages does Vidulk support?

Vidulk supports speech recognition in 99 languages including English, Spanish, French, German, Korean, Japanese, Chinese, Arabic, Hindi, Portuguese, and many more. The app interface is available in over 30 languages. Language is detected automatically.

What caption and editing features are available?

Vidulk includes 7 caption styles (Highlight, Karaoke, Typewriter, Minimal, Bold Pop, Gradient, and more), customizable fonts, colors, and animations. Export in multiple aspect ratios (9:16 for Shorts/Reels, 1:1 Square, 4:5 Portrait, 16:9 Landscape) at up to 4K resolution.

What is the AI Image Studio?

AI Studio lets you generate thumbnails and images from text prompts with 6 artistic styles including Realistic, Illustrated, Abstract, Minimalist, Anime, and Watercolor. It also includes an Image Enhancer that upscales images 2x or 4x. All processing happens on-device for privacy.

What content types does Vidulk work with?

Vidulk is optimized for podcasts, YouTube videos, interviews, lectures, gaming highlights, vlogs, music, sports, and news content. Import from YouTube, TikTok, Instagram, Twitter/X, Facebook, or upload directly from your camera roll.

Does Vidulk work with long videos?

Yes. Vidulk handles videos of any length. Short videos are processed on-device, while longer videos (over 5 minutes) are processed using server-side AI for faster and more reliable results.

What platforms is Vidulk available on?

Vidulk is available on both iOS (App Store) and Android (Google Play Store). The app interface is available in over 30 languages.

Yes. Video transcription and AI image processing happen on-device. Your videos are not stored on external servers permanently. You can delete your account and all data at any time from the app settings.

Can I use Vidulk for audio-only content like podcasts?

Yes. Vidulk fully supports audio-only content. Import MP3, M4A, WAV, or other audio files. AI detects the best moments and you can add AI-generated background images or choose from 1,200+ built-in backgrounds to create video clips from audio.

Can Vidulk remove captions or subtitles from videos?

Yes. Vidulk includes AI-powered caption removal that automatically detects and removes burned-in captions and subtitles from your videos before clipping. It works best with dynamic/moving captions like those on TikTok, Reels, and YouTube. Enable it with a simple checkbox when importing your video. Processing takes 7-20 minutes and uses additional credits based on video length.

How do I export clips from Vidulk?

After editing, choose your aspect ratio (9:16, 1:1, 4:5, or 16:9), resolution (720p, 1080p, or 4K), and export. Clips are saved directly to your Photos library and can be shared instantly to any platform.

How to Turn OBS Recordings into Instagram Reels Clips

To convert an OBS recording into Instagram Reels clips, you need to reformat your video to vertical 9:16, trim it to highlight the best moments, and add captions. Vidulk’s AI Clipper streamlines this process automatically.

OBS Recording to Instagram Reels Clips: How to Convert

1. Prepare Your OBS Recording for Reels

OBS typically records in MKV or MP4. Before uploading to any editing tool or app, ensure your file is in MP4 format for maximum compatibility. If your source is MKV, use OBS’s built-in ‘Remux Recordings’ feature (File > Remux Recordings) to convert it to MP4 without quality loss. Keep your original resolution high - 1080p is standard for Reels.

2. Understand Instagram Reels Specs (2026)

Aspect Ratio: 9:16 vertical (recommended for full-screen)
Resolution: 1080x1920 is standard; 1440x2560 is also accepted
Length: Up to 20 minutes recorded in-app; 3-minute uploads (as of Jan 2025 update)
Captions: Instagram provides auto-captions via the Captions sticker in the Reels editor

3. Automate Clipping and Formatting with Vidulk

Manual editing - finding highlights, resizing, and captioning - takes time. Vidulk’s AI Clipper (available for iOS and Android) automates these steps:

Upload your OBS MP4 recording to the Vidulk app
The AI scans your long video for the most engaging moments
It automatically outputs short, vertical clips sized for Instagram Reels
Captions are auto-generated and burned in, matching Reels’ style

Vidulk ensures your clips meet Reels’ technical specs, so you can focus on sharing, not editing.

4. Export and Upload to Instagram Reels

Export your finished clips from Vidulk in MP4 format
Transfer to your phone if needed
Open Instagram, tap the Reels tab, and upload your clip
Use the in-app editor for final tweaks or to add the Captions sticker for accessibility

Vidulk's AI clipper (free to start, iOS + Android) finds the best moments in a long video and exports captioned vertical clips sized for the destination.

Try Vidulk

FAQ

How do I convert OBS MKV recordings to MP4 for Instagram Reels?

In OBS, use File > Remux Recordings to convert MKV to MP4. This preserves quality and ensures compatibility with Instagram Reels and editing apps.

What is the best aspect ratio and resolution for Instagram Reels?

Instagram Reels recommends a 9:16 aspect ratio (vertical). Standard resolution is 1080x1920 pixels, but 1440x2560 is also accepted.

How does Vidulk automate creating Reels clips from OBS recordings?

Vidulk’s AI Clipper analyzes your long video, finds the best moments, and exports short, vertical, captioned clips sized for Reels - no manual editing needed.

Can I add captions to my Reels clips automatically?

Yes. Vidulk auto-generates and burns captions into your clips. Instagram also offers auto-captions via the Captions sticker in the Reels editor.

Is Vidulk’s AI Clipper free to use?

Vidulk is free to start; some features may require in-app purchases or upgrades.