Runway Expand Video

Varied Aspect Ratios

The Expand Video feature of Runway AI enables users to convert their videos into multiple resolutions; 1280x768 (landscape) or 768x1280 (portrait). Since the tool adds beyond the edges of the existing video, the visual quality will not be negatively impacted in the process.

Input Video	Text prompt	Guidance Image	Output Video
	None	None
	In a cave with lava in the foreground	None
	None

Descriptive Prompting

While you can use Expand Video without a prompt, inputting one helps you gain more control over the final output. By describing what you want to be shown in the expanded areas, you can effectively reduce the risk of the tool producing less unpredictable results.

RUNWAY’S NEW “EXPAND” → Awesome.

Outpainiting is super consistent.

QUICK TIPS:
+ Text prompts still have big influence
+ Your text prompts influence the “outpainting”
+ So w/e you want to generate “net new”
+ Make sure it’s in your prompt

MJ PROMPT Ex:
wide angle documentary… pic.twitter.com/6uZqqGLIfo

— Rory Flynn (@Ror_Fly) November 26, 2024

Guidance Image

With Expand Video, you can use an expanded image of the existing video’s first frame to give the tool a precise idea of the kind of output you want. With this, you don’t even need to use a text prompt. Simply upload the image and the expanded output will match it.

Best Practices When Expanding Videos Using Runway

If you intend to expand existing videos, there are several aspects to consider when using this tool that will help you achieve the best possible results.

• When uploading videos, make sure the input is at least 620 pixels in width and height. Runway Expand Video will not accept anything less for expansion.
• If you intend to upload a guidance image, it is important to ensure that it matches/aligns with the first frame of the video to prevent a visual jump.
• You can feel free to expand a video multiple times but be sure to hover over the Duration icon to estimate what the cost of credit will be.
• If the existing video contains a subject, it is always best to ensure it is close to the center of the frame to prevent any potential distortion or alteration in detail.