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H3 Max Reference to Video

All image to video models

fal's H3 Max is a post-trained variant of MiniMax H3, tuned for stronger prompt adherence and better aesthetics while co-optimized with our custom inference stack for higher throughput with no compromises on output quality

Inference$ Commercial useFrom 20 credits per run

About H3 Max Reference to Video

fal's H3 Max is a post-trained variant of MiniMax H3, tuned for stronger prompt adherence and better aesthetics while co-optimized with our custom inference stack for higher throughput with no compromises on output quality

stylizedtransformtypography

Pricing

A run with the default settings costs 20 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.

image_urlfile

Optional URL of the image to use as the first frame. The video opens exactly on this image while the references keep the subjects consistent; the output canvas follows this image.

middle_image_urlfile

Optional image to guide the video at middle_frame_time. Requires start and end images and native 480P or 768P resolution.

middle_frame_timenumber

Target time for the middle image, in seconds from the start. Rounded to the nearest frame at 24 fps; it must fall strictly between the first and last frames of the requested duration. Requires middle_image_url.

end_image_urlfile

Optional URL of the image to use as the last frame. The video ends exactly on this image.

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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