Video Upscaler API — Upscale Video to 4K
Live3 modelsMuapi's video upscaler API increases the resolution of existing footage — from low-resolution source clips up to 720p, 1080p, 2K, or 4K — through a single unified REST endpoint. Three models cover the cost-to-quality spectrum: the base AI Video Upscaler for everyday footage, AI Video Upscaler Pro for cleaner detail reconstruction, and Topaz Video Upscale for premium fixed-factor upscaling. Same submit-and-poll pattern as every other model on the platform, billed per second of input video.
AI Video Upscaler
General-purpose upscaling to 720p, 1080p, 2K, or 4K with optional audio passthrough. Lowest cost per second on the platform — the default choice for most footage.
AI Video Upscaler Pro
Higher-fidelity detail reconstruction at the same 720p–4K resolution targets, for footage where the base upscaler's output isn't clean enough.
Topaz Video Upscale
Professional-grade upscaling with a simple 1x/2x/4x scale factor instead of named resolutions — Topaz's dedicated video model for maximum quality on premium sources.
What is a Video Upscaler API?
A video upscaler API increases a video's resolution and sharpens detail using machine learning, instead of simple pixel interpolation. Submit a video URL and a target resolution or scale factor, and get back an upscaled file — useful for archival footage, low-resolution AI-generated clips, screen recordings, or any source that needs a resolution boost before publishing.
Muapi exposes three video upscaling endpoints through the same unified REST pattern used across every model on the platform — one API key, one request/poll flow, billed per second of input video.
Key Capabilities
Named Resolution Targets
AI Video Upscaler and Pro accept 720p, 1080p, 2K, or 4K as a target resolution — pick the output size directly instead of guessing a scale factor.
Fixed Scale-Factor Upscaling
Topaz Video Upscale uses a 1x/2x/4x scale factor model, doubling or quadrupling width and height for a predictable output size regardless of source resolution.
Audio Passthrough
The base AI Video Upscaler can copy the original video's audio track onto the upscaled output, so you don't need a separate mux step.
Cost Scales with Duration and Resolution
Every model bills per second of input video — the base upscaler and Pro scale cost with the target resolution, while Topaz is a flat per-second rate.
Two Quality Tiers on Muapi's Own Models
AI Video Upscaler Pro applies more aggressive detail reconstruction than the base model for footage where the standard tier's output looks soft.
Same Submit-and-Poll Pattern
All three models return a request_id you poll for completion — identical integration code as image upscaling, background removal, and every other tool endpoint on Muapi.
Video Upscaler Model Comparison
| Model | Provider | Price | Best For |
|---|---|---|---|
| AI Video Upscaler | Muapi | $0.01–$0.04 / sec (by resolution) | General-purpose upscaling, lowest cost |
| AI Video Upscaler Pro | Muapi | $0.02–$0.05 / sec (by resolution) | Cleaner detail reconstruction than the base tier |
| Topaz Video Upscale | Topaz | $0.08 / sec (any scale factor) | Premium quality, fixed 1x/2x/4x scale factor |
AI Video Upscaler Pro bills its per-resolution rate for the first 5 seconds, then the same per-second rate for any additional duration — a 10-second 1080p clip costs $0.30, for example.
How to Upscale a Video via API
- Pick a model — the base AI Video Upscaler for cost, Pro for cleaner detail, Topaz for maximum quality.
- Choose a target — a resolution (720p/1080p/2K/4K) for the Muapi models, or a scale factor (1x/2x/4x) for Topaz.
- Submit the request —
POST /api/v1/{model-slug}with your video URL and target parameters. - Poll for completion — check
GET /api/v1/predictions/{request_id}/resultuntilstatusiscompleted, then download the upscaled video.
Frequently Asked Questions
What is the Video Upscaler API?
Muapi's video upscaler API increases a video's resolution using machine learning. Three models — AI Video Upscaler, AI Video Upscaler Pro, and Topaz Video Upscale — cover the cost-to-quality spectrum, all billed per second of input video.
Which model should I use?
Start with the base AI Video Upscaler for the lowest cost. Use AI Video Upscaler Pro if the output isn't clean enough, or Topaz Video Upscale for premium quality on a fixed 1x/2x/4x scale factor.
How much does video upscaling cost?
The base AI Video Upscaler runs $0.01/sec at 720p/1080p up to $0.04/sec at 4K. AI Video Upscaler Pro runs $0.02/sec at 720p up to $0.05/sec at 4K for the first 5 seconds, then the same rate per additional second. Topaz Video Upscale is a flat $0.08/sec regardless of scale factor.
What's the maximum resolution I can upscale to?
4K on both AI Video Upscaler and AI Video Upscaler Pro. Topaz Video Upscale scales by factor (1x/2x/4x) instead of a named resolution, so the output size depends on your source video.
Does upscaling preserve the original audio?
Yes — the base AI Video Upscaler can copy the original audio track onto the upscaled output by default.
Can I get Video Upscaler API access right now?
Yes. Sign up at muapi.ai, create an API key from your dashboard, and start upscaling video immediately — no waitlist required.