Upscale Video in After Effects: How-To

Upscaling video in After Effects means increasing its pixel dimensions beyond the original resolution, and the program offers several built-in methods to do this. You can get a sharper result by using the Detail-preserving Upscale effect, or a faster result with the standard Scale property and the right sampling quality. This article covers the practical steps, the differences between each method, and the common pitfalls you will run into.

Formula

The math behind upscaling is simple multiplication. If you scale a clip by a factor s (as a percentage), the new width and height are:

New width = Original width × (s / 100)
New height = Original height × (s / 100)

Where original width and original height are in pixels, and s is the scale factor in percent. For example, a 200% scale doubles both dimensions, so a 1920×1080 clip becomes 3840×2160 (4K).

Worked Example

Take a 1920×1080 clip and scale it to 200% using the calculator defaults:

1. New width = 1920 × (200 / 100) = 1920 × 2 = 3840 pixels
2. New height = 1080 × (200 / 100) = 1080 × 2 = 2160 pixels

The result is 3840×2160, which matches the first output of the calculator. This is the same math After Effects performs internally when you set the Scale property to 200%.

Why Upscaling in After Effects Is Different From Resizing

When you enlarge a video, the software must create new pixels that did not exist in the original file. This process is called interpolation. After Effects gives you several interpolation methods, and the one you choose determines how soft, sharp, or artifact-ridden the final image looks.

The most common mistake is simply dragging the corner of a layer to enlarge it without changing the quality settings. By default, After Effects uses a sampling method that is fast but not ideal for large upscales. For a clean result, you need to either switch the layer’s Quality setting to Best, or apply a dedicated effect that uses advanced algorithms.

Method 1: Using the Scale Property with Best Quality

The simplest way to upscale is to increase the Scale value of the layer. Here is the step-by-step:

1. Select the layer in the Timeline panel.
2. Press S to reveal the Scale property.
3. Click the stopwatch to set a keyframe if you want the scale to change over time, or just type a new percentage.
4. Make sure the layer’s Quality toggle is set to Best (the solid checkmark icon at the top of the layer).
5. If the layer is smaller than the composition, you may also need to adjust the Anchor Point so it scales from the center.

This method is quick, but it uses a basic bilinear interpolation. For a 2× upscale, the result will look slightly soft. For a 4× upscale, it will look noticeably blurry. It is fine for previews or when the final output will be heavily compressed, but not ideal for high-quality work.

Method 2: Detail-preserving Upscale Effect

After Effects includes a built-in effect called Detail-preserving Upscale that is designed specifically for enlarging footage while keeping edges sharp. To use it:

1. Select the layer.
2. Go to Effect > Distort > Detail-preserving Upscale.
3. Set the Scale value to the percentage you need (e.g., 200 for 2×).
4. Adjust the Radius and Detail sliders to control how much edge sharpening is applied.

This effect works by analyzing the local contrast and reconstructing edges more intelligently than simple scaling. It is much better for upscaling to 4K from 1080p, but it is also more processor-intensive. For a 4× upscale, you may need to apply it in two steps (e.g., 2× then 2×) to avoid artifacts.

Method 3: Third-Party Plugins and AI Upscalers

For the best quality, many editors turn to dedicated upscaling software or plugins that use machine learning. These tools can add detail that was not in the original, such as texture in skin or fabric. Examples include Topaz Video AI, Video Enhance AI, and some GPU-accelerated plugins for After Effects.

These tools are not free, and they require a separate render pass. Typically, you would upscale the footage in the plugin, export a new high-resolution file, and then import that file back into After Effects for further editing. This workflow gives the highest quality but is slower and more complex.

Choosing the Right Method for Your Project

The best method depends on your source footage, your target resolution, and your deadline. Use this general guide:

• Preview or draft: Use the Scale property with Best quality.
• Final delivery from 1080p to 4K: Use Detail-preserving Upscale.
• Upscaling old SD footage (480p) to HD: Use a third-party AI tool, because the built-in methods will look too soft.
• Upscaling a still image: Use Photoshop’s Preserve Details 2.0, then import the image.

Common Problems and How to Avoid Them

Three issues come up repeatedly when upscaling in After Effects:

• Softness: This is normal with any upscale. To combat it, apply a slight sharpening effect (like Unsharp Mask) after upscaling, but be careful not to overdo it.
• Jagged edges: This happens when the layer’s Quality is set to Draft. Always switch to Best before rendering.
• Motion artifacts: If your footage has fast movement, the upscale can produce shimmering or ghosting. This is more common with AI tools. Try using a lower detail setting or frame blending.

Frequently Asked Questions

Does upscaling in After Effects improve quality?

No. Upscaling cannot create information that was not captured. It only makes the image larger, and the software guesses what the missing pixels should look like. The result is always softer than the original, though some tools can make the guess more convincing.

What is the best way to upscale 1080p to 4K in After Effects?

Use the Detail-preserving Upscale effect with a Scale of 200. If the result is still too soft, apply a subtle sharpening effect. For the absolute best quality, use a dedicated AI upscaler as a separate step.

Why does my upscaled video look blurry in the preview?

Check the zoom level in the Composition panel. If you are viewing at 100% on a 4K monitor, a 1080p upscale will look soft. Also, make sure the layer’s Quality is set to Best, and that the Resolution in the preview is set to Full.

Can I upscale multiple clips at once?

Yes. Select all the clips in the Timeline, then apply the Detail-preserving Upscale effect to one of them. After Effects will apply the effect to all selected layers, but you may need to adjust each one’s Scale value individually if they have different original resolutions.

Is there a free way to upscale video in After Effects?

Yes, the built-in methods are free. The Detail-preserving Upscale effect is included with After Effects. For AI upscaling, there are some free trials, but the best tools are paid. You can also use free open-source software like Video2X, but that requires a separate workflow.

Does upscaling affect render time?

Yes, significantly. Detail-preserving Upscale and AI tools require heavy computation. A 2× upscale can double or triple render time. Plan accordingly, and consider rendering at a lower resolution for previews.

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in w | Original width | px | 1920 | 0
in h | Original height | px | 1080 | 0
in s | Scale factor | % | 200 | 1
out nw | New width | px | w * s / 100 | 0
out nh | New height | px | h * s / 100 | 0