Aspect Ratio Guide for Text-to-Video: Choosing the Right Frame for Each Platform

Text-to-video models render at fixed internal resolutions and then crop or pad to your target aspect ratio. Choosing the wrong ratio leads to letterboxing, off-center subjects, or wasted render pixels.

**Native Ratios by Model**

Most current models render natively at 16:9 (1280x720 or 1920x1080). Some also support 9:16 for vertical short-form content and 1:1 for social feeds. When you request a ratio the model does not natively support, the engine pads with black bars or crops the frame, which can cut off subjects at the edges.

**Platform Recommendations**

1. **YouTube / Landing Pages**: 16:9 — the native ratio for most models, no crop needed
2. **TikTok / Reels / Shorts**: 9:16 — request vertical output directly; do not crop from 16:9
3. **Instagram Feed / LinkedIn**: 1:1 or 4:5 — safe for cross-platform feed display
4. **Twitter/X**: 16:9 or 1:1 — both render well in timeline cards

**How to Preview the Crop**

Before spending a generation credit, use the preview overlay to see which portion of the 16:9 render will survive the crop. Check that the subject stays within the safe zone and that no key text or logos fall outside the target frame.

**Common Mistakes**

• Requesting 9:16 from a model that only renders 16:9, then accepting the auto-crop without review
• Placing the subject at the center of the prompt and losing it when the engine crops to a wider ratio
• Using 21:9 cinematic ratio without confirming the model supports it, resulting in heavy padding

Video Studio handles aspect ratio selection at the prompt stage and shows a live crop preview before generation. Try it at https://getvideostudio.com — sapsap@qq.com.