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 X (Twitter) Clips

To convert an OBS recording into short, vertical, captioned clips sized for X (Twitter), use Vidulk’s AI Clipper and follow X’s video specs for best results.

OBS Recording to X (Twitter) Clips: Quick Guide & Automation

1. Prepare Your OBS Recording

Record your stream, gameplay, or tutorial in OBS using the highest quality settings. OBS saves by default in MKV for safety. Before uploading anywhere, remux your MKV file to MP4 (File > Remux Recordings in OBS). This ensures compatibility with most video editing tools and apps, including Vidulk.

2. Know X (Twitter) Video Specs

Length: Non-Premium users can upload videos up to 2:20 (140 seconds). Premium users can upload up to 2 hours at 1080p, or 4 hours at 720p.
Aspect Ratio: Landscape (16:9), Portrait (9:16), or Square (1:1) are all supported. Recommended for vertical clips: 9:16 (portrait).
Resolution: 720x1280 (portrait), 1280x720 (landscape), or 720x720 (square) are optimal.
Captions: You can attach SRT subtitle files to videos on X via the web.

3. Clip and Format with Vidulk's AI Clipper

Open the Vidulk app on iOS or Android.
Upload your MP4 OBS recording. The AI Clipper scans your video and automatically finds the most engaging moments.
Select the best vertical (9:16) clips for X. Vidulk exports them in the right size and adds captions directly onto the video.
Review and save your clips for upload.

4. Upload and Caption on X (Twitter)

Log in to X (Twitter) on the web or mobile app.
Upload your vertical clip. For accessibility, you can attach an SRT subtitle file if you wish, or rely on the burned-in captions from Vidulk.
Double-check that your video meets X’s specs for aspect ratio and length before posting.

5. Automate the Process with Vidulk

Vidulk streamlines the workflow by auto-selecting highlights and exporting them in vertical format with captions, ready for X. This saves time versus manual editing and ensures your clips are optimized for X’s feed and audience.

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 an OBS MKV recording to MP4?

In OBS, go to File > Remux Recordings, select your MKV file, and convert it to MP4 for better compatibility with editing apps and social media.

What is the best aspect ratio for X (Twitter) clips?

For vertical clips, use 9:16 (portrait). X also supports 16:9 (landscape) and 1:1 (square), but vertical works best for mobile feeds.

Does Vidulk add captions to my X (Twitter) clips?

Yes, Vidulk’s AI Clipper burns captions directly onto your vertical clips, making them more engaging and accessible.

What is the maximum video length for non-premium X users?

Non-Premium X (Twitter) users can upload videos up to 2 minutes and 20 seconds (140 seconds) in length.

Can I upload SRT subtitles to X (Twitter) videos?

Yes, you can attach SRT subtitle files when uploading videos to X (Twitter) via the web for added accessibility.