Gemini Omni Flash 1.1 generates video from a text prompt or animates a still image you supply. Adding an image selects image-to-video mode automatically. The image then determines the output aspect ratio, overriding the Aspect Ratio setting.
Resolution affects the cost per second. 360p costs the least, 720p is the default, and 4K costs roughly ten times as much per second as 360p. Check the resolution and duration together when comparing costs.
Video Duration runs from 3 to 10 seconds. Add an End Frame alongside the first image to generate a video that transitions between the two images.