Gemini Omni AI video generator: multimodal input, characters and voice
Gemini Omni is a multimodal AI video generator: alongside a text prompt it accepts images, video, audio and even saved characters as input. Describe a scene in words, back it up with pictures, pick a voice for the dialogue and shoot a whole series of clips featuring the same hero — all inside one model.
What Omni means in practice
Most video models take text or a single picture. Gemini Omni takes a mixed diet: a text prompt plus up to seven images, video or audio as extra context. Want a clip inspired by a specific frame, carrying the mood of a specific track? Bring everything at once — the model weighs every source you attach.
That changes how you frame the task. Instead of a long paragraph painting "a house like this, light like that", you simply show a photo of the house and use words only for the action. Text drives the plot, attachments define the look — each input type does its own job.
Characters: one hero across every clip
The curse of ordinary generators is that the hero mutates from clip to clip. Here it is solved by a dedicated Character tab: you create a character once, it lands in your personal library, and from then on you attach it to any generation. The appearance stays consistent video after video.
That is how series get made: a virtual show host, a brand mascot, a recurring hero for children's stories. Saved characters are picked from the library with one click right in the generation form — no re-uploading references and hoping the model "remembers" the face.
Voice-over: preset voices and your own
A clip can come out with sound from the start. The settings offer a roster of preset voices, male and female, spanning different timbres and personalities — from soft and high to low and gravelly. Pick a voice, put the line into your prompt, and the character speaks right in the frame.
If none of the presets fit, the Audio tab lets you build a custom voice on top of a base preset. It joins your personal library and plugs into generations just like the standard ones. For a brand, that means one recognizable voice across every video you publish.
Up to 4K output and frame formats
Gemini Omni is one of the few models on the site with 4K output: available resolutions are 720p, 1080p and 4K. Clip length is 4, 6, 8 or 10 seconds; the frame is either widescreen 16:9 or vertical 9:16 for social feeds. Price scales with duration and quality.
A practical routine: iterate drafts in 720p where generation is cheaper and faster, then rerun the winning version in 1080p or 4K. Finished clips live in your generation history, where you can download them, extend them or rerun the prompt with tweaks.
How to approach your first generation
Do not switch on every feature at once. Make the first clip from text alone to get a feel for how the model reads descriptions. Then add a reference image, then a voice, and only after that set up a persistent character. Each step adds control but asks for a bit more care in wording.
Keep the classic order in your scene description: who is in the frame, what they do, where it happens, how the camera behaves. If there is a spoken line, give it its own sentence. This structure lands a coherent clip on the first or second try almost every time.
How is Gemini Omni different from regular video models?
Mixed input and libraries. A regular model gets text or one picture; here you combine text, images, video and audio, and attach saved characters and custom voices on top. That makes it the right pick for serial content built around one hero.
How do I make several clips with the same character?
Create the character in the Character tab — it is saved to your library. Then select it with one click in every new generation. The hero's appearance repeats from clip to clip with no need to re-upload references.
Can the video include sound and speech?
Yes. Choose one of the preset voices or build your own in the Audio tab, then write the character's line inside the scene description. The model renders a clip where the hero delivers that line in the selected voice.