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H3 Max Turbo Reference to Video

All image to video models

Generate video with synchronized audio from a prompt and image, video, or audio references with H3 Max Turbo, at 480p, 768p, or 1080p for up to 15 seconds.

Inference$ Commercial useFrom 4 credits per run

About H3 Max Turbo Reference to Video

Generate video with synchronized audio from a prompt and image, video, or audio references with H3 Max Turbo, at 480p, 768p, or 1080p for up to 15 seconds.

reference-to-videovideo-generationaudio

Pricing

A run with the default settings costs 4 credits. The exact cost updates in the playground as you change settings, and you're only charged when you press Run. Failed runs are refunded automatically.

Inputs

prompttextarearequired

Text prompt for video generation. Refer to reference assets by their modality and order in the reference lists: Image 1, Image 2, Video 1, Audio 1, and so on.

reference_image_urlsfile-list

URLs of subject/style reference images, referenced in the prompt as Image 1, Image 2, and so on. Reference images, videos, and audio clips must add up to at most 12 files.

reference_video_urlsfile-list

URLs of motion/reference video clips (2-15 seconds each, combined duration at most 15 seconds), referenced in the prompt as Video 1, Video 2, and so on. Reference images, videos, and audio clips must add up to at most 12 files.

reference_audio_urlsfile-list

URLs of reference audio clips (2-15 seconds each, combined duration at most 15 seconds), referenced in the prompt as Audio 1, Audio 2, and so on. Images, videos, and audio can be provided individually or together. Reference images, videos, and audio clips must add up to at most 12 files.

target_audio_urlfile

Optional URL of an audio clip at least 2 seconds long (maximum 15 MB) to pin to the generated soundtrack. Cannot be combined with reference audio. Longer clips are trimmed to the generated video's length, keeping the beginning; shorter clips are padded with silence. The clip is resampled to 32 kHz stereo and replaces the output soundtrack without changing playback speed. Accepts an HTTP(S) URL or a base64 data URI.

durationnumberdefault: 5

Video length in seconds. The output can run up to about 0.7 s longer than requested. Use at least 2 s with target_audio_url.

resolutionselectdefault: "768P"

The native generation resolution, or 1080P latent refinement from a native 768P source.

Options: 480P, 768P

seedinteger

Random seed. A random seed is selected when omitted.

enable_safety_checkerbooleandefault: true

If set to true, the safety checker will be enabled.

sync_modebooleandefault: false

Return the generated video as base64 instead of a CDN URL.

prompt_expansion_modetextarearequireddefault: "balanced"

How much effort to spend rewriting the prompt before generation. 'disabled' skips prompt expansion. 'balanced' returns in about a second. 'quality' spends up to ~30s on a richer prompt.

aspect_ratioselectdefault: "adaptive"

The aspect ratio of the generated video.

Options: adaptive, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16

reference_conditionsjson

Ordered reference list; cross-modality order is semantic and is preserved end-to-end. Do not combine with reference_*_urls.

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