InfiniteTalk Multi | Video to Video.

InfiniteTalk Multi Video to Video Overview

InfiniTalk Multi Video-to-Video transforms multi-speaker footage into naturally dubbed video, syncing each person's lips and expressions to their audio track.

A source video and separate left and right audio tracks drive multi-speaker lip synchronization.

InfiniteTalk Multi Video to Video from Infinitetalk is available through each::labs in the InfiniteTalk family. Required fields are video, left_audio, right_audio.

prompt: Optional text prompt to guide scene, pose, expression, or style. order: Controls whether both speakers talk at the same time, the left speaker talks first, or the right speaker talks first.

Use the InfiniteTalk Multi Video to Video API when you need this transformation or analysis as a repeatable step in an application or creative pipeline. The sections below distinguish the required material, adjustable controls and checks that matter before delivery.

Capabilities

• A source video and separate left and right audio tracks drive multi-speaker lip synchronization.
• prompt: Optional text prompt to guide scene, pose, expression, or style.
• order: Controls whether both speakers talk at the same time, the left speaker talks first, or the right speaker talks first.
• resolution: Output video resolution.
• video: Video URL containing two people to animate with separate left and right audio tracks.

Use Cases for InfiniteTalk Multi Video to Video

InfiniteTalk Multi Video to Video is useful when this specific operation fits between source preparation and delivery. These scenarios show how it can support different parts of a working pipeline.

Creators

Create a dialogue-dubbing draft. Use a representative source or a concise brief, then inspect the result before preparing a larger set of assets.

Design and marketing teams

Preview alternate narration tracks. Compare the result with the intended message, composition and destination. Keep reviewable versions of the source and output.

Developers

Synchronize a two-person scene with supplied audio. Inspect the actual returned value before connecting it to another step, and keep the chosen request settings with the result.

Start with a clear definition of the desired result and use the exposed controls to reach it. Keep any additional generation, editing or application logic in separate steps so that the effect of this operation remains easy to review.

Tips and Tricks

Describe one coherent shot before adding complex action. State the subject, movement, camera behavior and setting separately. For reference-guided requests, choose source images with clear subjects and compatible framing.

• order: Controls whether both speakers talk at the same time, the left speaker talks first, or the right speaker talks first.
• resolution: Output video resolution.

• Example direction: “A slow camera push toward the subject; one gentle movement, consistent lighting, no scene cut.”
• Example direction: “The subject turns slightly toward the camera while the background remains still.”

Compare one deliberate adjustment at a time. Inspect the part of the result affected by that change, then check the rest of the asset or response for unwanted side effects before reusing the settings.

Technical Specifications

• Result type: video.
• Required fields: video, left_audio, right_audio.
• resolution: string or null; options 480p, 720p; default "480p".
• prompt: string or null.
• order: string or null; options meanwhile, left_right, right_left; default "meanwhile".

video: Video URL containing two people to animate with separate left and right audio tracks.

Values must use the types and accepted options listed in the parameter reference. A displayed default does not remove a required-field requirement. Choose a supported output setting for this entry rather than borrowing a preset from a related model.

Things to Be Aware Of

Watch the entire clip rather than reviewing only a thumbnail. Check subject identity, object boundaries, motion continuity, camera changes and the ending; review the audio as well when the entry includes it.

Optional settings are not necessarily interchangeable with those on another entry in the same family. Use the accepted names, types and values shown for this operation.

For media-based inputs, supply a directly retrievable file URL rather than a page containing the asset. Keep the source available while processing. Check the final content in the destination player, editor or application, not only the request status.

Key Considerations

Speaker assignment and timing matter; watch the full clip to check both faces and transitions.

Public estimate: $0.03–$0.06 per second.

Prepare video, left_audio, right_audio before starting. Optional settings include prompt, order, resolution. Keep these settings aligned with the intended delivery, especially when a later step expects a particular type or format.

Run a representative request before scaling to a larger collection. Judge the result against the source and the brief, and account for all generated outputs or usage-sensitive options when estimating a batch.

Limitations

• prompt: maximum characters: 4000.
• order: allowed values: ["meanwhile", "left_right", "right_left"].

Unsupported parameters do not establish additional capabilities. A generated result can differ from the intended brief, so review detail and consistency before publication.