Convert Video Content into Studio-Quality Marketing Visuals Instantly
Generate posters and thumbnails directly from video files or YouTube URLs.
Use the gemini-3.1-flash-image model to create visual summaries, posters, or thumbnails by providing a video file or YouTube URL as multimodal context.
The Scenario
You have a long-form video or a YouTube tutorial and need to quickly create professional marketing assets like thumbnails, posters, or infographics to promote it.
Before & after
Previously, you would manually scrub through video timelines to find keyframes, then use design software to create layouts, taking 45-60 minutes per asset.
By utilizing the `gemini-3.1-flash-image` model, you can automate this process. AI can analyze the video context to generate high-quality visual assets in about 1-2 minutes.
The Prompt
I am providing a [VIDEO_URL/UPLOAD_VIDEO]. Using the gemini-3.1-flash-image model, please generate a cinematic movie poster that captures the core theme and visual style of this video, including a title and a compelling tagline.
The new Gemini 3.1 Flash Image model allow users to pass a video file or a public YouTube URL as context. This is highly effective for creating marketing materials that are contextually consistent with the video content without needing a separate design workflow.
Source
Release notes | Gemini API | Google AI for Developers"You can now pass a video file... as multimodal context alongside a text prompt to generate high-quality thumbnails, cinematic movie posters, or summary infographics."