When preparing long-form video footage for distribution across modern social media platforms, matching each platform’s exact aspect ratio, resolution standard, and frame rate specifications is critical to avoid black letterboxing, stretching, or severe compression penalties.
The Fundamental Aspect Ratios
9:16 (Vertical Fullscreen)
Resolution: 1080 x 1920 px (or 2160 x 3840 for 4K). Standard for TikTok, Instagram Reels, YouTube Shorts, and WhatsApp Status.
16:9 (Landscape Widescreen)
Resolution: 1920 x 1080 px (or 3840 x 2160 for 4K). Standard for YouTube long-form, Vimeo, podcasts, and desktop presentations.
1:1 (Square)
Resolution: 1080 x 1080 px. Ideal for Instagram Feed carousels, LinkedIn posts, and Twitter/X feeds.
4:5 (Vertical Feed Portrait)
Resolution: 1080 x 1350 px. Dominates Instagram main feed by maximizing on-screen real estate without triggering reel auto-play.
Platform-by-Platform Specification Table
| Platform | Aspect Ratio | Recommended Resolution | Max Length / Part |
|---|---|---|---|
| TikTok | 9:16 (Vertical) | 1080 x 1920 px | 60s / 180s |
| Instagram Reels | 9:16 (Vertical) | 1080 x 1920 px | 90 seconds |
| YouTube Shorts | 9:16 (Vertical) | 1080 x 1920 px | 60 seconds |
| WhatsApp Status | 9:16 / 16:9 | 720p / 1080p | 30 seconds |
Workflow: Splitting Long Videos into Social Media Segments
When you record a 10-minute vlog or tutorial, you can use SliceFlow to split the video automatically into 30s or 60s clips without losing clarity. With one click, all parts are generated in sequential chronological order ready to be posted as Part 1, Part 2, Part 3 on your channel.