Question 1

How is Omni Reference different from Image-to-Video?

Accepted Answer

Image-to-Video uses your image as a literal first frame and animates it. Omni Reference uses images, videos, and audio as creative guides — the model generates a new scene that visually matches your references without using them as literal frames. It also supports video and audio references, which Image-to-Video does not.

Question 2

How do I reference my uploaded files in the prompt?

Accepted Answer

Use @image1, @image2, etc. to reference images by position in images_list. Use @video1, @video2 for videos by position in video_files. Use @audio1, @audio2 for audio files by position in audio_files. If you don't use @ syntax, the first reference is automatically used as the primary reference.

Question 3

Do I need to provide all types of references?

Accepted Answer

No. All reference arrays are optional. You can provide just images, just a video, just audio, or any combination. A text-only prompt is also valid.

Question 4

What file formats are supported?

Accepted Answer

Images: JPEG, PNG, or WebP (up to 9). Videos: MP4 only, max 15 seconds each (up to 3). Audio: MP3, WAV, or other common formats, total max 15 seconds (up to 3 files). All URLs must be publicly accessible.

Question 5

How is cost calculated?

Accepted Answer

Cost = (rate × output_duration) + (0.3 × rate × total_input_video_duration). Per-second output rates are: 480p — $0.18 basic / $0.24 high; 720p — $0.21 basic / $0.30 high; 1080p — $0.4725 basic / $0.675 high; 4K — $0.945 basic / $1.35 high. If video_files are provided, an additional 30% surcharge applies per second of combined input video duration. Example: 5s output (720p, high) + two 5s input videos = 5×$0.30 + 10×$0.09 = $1.50 + $0.90 = $2.40.

Question 6

What is the difference between 'high' and 'basic' quality?

Accepted Answer

'high' uses the standard model for best quality output. 'basic' uses the fast model which generates at approximately 2x speed with slightly reduced quality — ideal for quick iterations and previews. Existing requests without a quality field default to 'high'.

Question 7

What aspect ratios are supported?

Accepted Answer

16:9, 9:16, 1:1, 4:3, 3:4, and 21:9. Default is 16:9.

Question 8

Can I choose a lower resolution to save cost?

Accepted Answer

Yes. The `resolution` field accepts `480p` ($0.18/sec basic, $0.24/sec high), `720p` (default: $0.21/sec basic, $0.30/sec high), `1080p` ($0.4725/sec basic, $0.675/sec high), or `4k` ($0.945/sec basic, $1.35/sec high). Price scales with the resolution chosen, in addition to the quality tier.

Provider	Estimated Rate	Notes
muapiapp	$0.18–$1.35/sec depending on resolution/quality	Per-second billing, scaling by resolution and quality (480p: $0.18/sec basic, $0.24/sec high; 720p: $0.21/sec basic, $0.30/sec high; 1080p: $0.4725/sec basic, $0.675/sec high; 4K: $0.945/sec basic, $1.35/sec high). Supports multi-modal references (image + video + audio) in a single request.
Fal.ai	$0.3024/sec (high) / $0.2419/sec (basic)	Fal.ai charges $0.3024/sec for high quality and $0.2419/sec for basic. muapiapp is roughly the same on high ($0.30/sec) and 13% cheaper on basic ($0.21/sec).
Replicate	$0.3024/sec (high) / $0.2419/sec (basic)	Replicate charges the same as Fal.ai — $0.3024/sec (high), $0.2419/sec (basic). muapiapp is competitive on high quality and 13% cheaper on basic.

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