# inference.minimax.h3.fast.txt2vid.v1

Source: https://docs.prodia.com/job-types/inference-minimax-h3-fast-txt2vid-v1/

The `inference.minimax.h3.fast.txt2vid.v1` job generates a video with
synchronized stereo audio (1344×768, 24 fps, AAC 32 kHz) from a text prompt
using the MiniMax H3 (Hailuo-03) model. The `fast` tier is the fastest
option; outputs are equally coherent but not pixel-identical to `base` at
the same seed.

```json
{
    "type": "inference.minimax.h3.fast.txt2vid.v1",
    "config": {
        "prompt": "a red fox trotting through a snowy pine forest at golden hour"
    }
}
```

`duration` (whole seconds, 4–15), `aspect_ratio` (one of 16:9, 4:3, 1:1,
3:4, 9:16, 21:9; default 16:9) and `seed` can be set. Durations round
**up** to the model's frame grid (17n+5 frames at 24 fps): 4 s returns
4.46 s, 15 s returns 15.08 s, and values outside 4–15 fail validation. The
same seed reproduces the same video within a tier. `resolution` is accepted
for parity with other MiniMax job types, but only its default `768P` is
valid: this job type generates at a 768 px short edge only.
Typical latency: roughly 25 s for a 5 s clip, \~105 s for a 15 s one.

```json
{
    "type": "inference.minimax.h3.fast.txt2vid.v1",
    "config": {
        "prompt": "a red fox trotting through a snowy pine forest at golden hour",
        "duration": 10,
        "seed": 42
    }
}
```

## Schema

```json
{
	"type": "object",
	"required": [
		"type",
		"config"
	],
	"additionalProperties": false,
	"properties": {
		"type": {
			"type": "string",
			"enum": [
				"inference.minimax.h3.base.txt2vid.v0",
				"inference.minimax.h3.fast.txt2vid.v0",
				"inference.minimax.h3.base.txt2vid.v1",
				"inference.minimax.h3.fast.txt2vid.v1"
			]
		},
		"config": {
			"type": "object",
			"required": [
				"prompt"
			],
			"additionalProperties": false,
			"properties": {
				"prompt": {
					"type": "string",
					"minLength": 3,
					"maxLength": 7000,
					"default": "a dancing cat under moonlight",
					"description": "Description of the desired video and audio."
				},
				"duration": {
					"type": "integer",
					"minimum": 4,
					"maximum": 15,
					"default": 6,
					"description": "Duration of the video in seconds. Rounded up to the model's frame grid (4 s returns 4.46 s, 15 s returns 15.08 s)."
				},
				"aspect_ratio": {
					"type": "string",
					"enum": [
						"16:9",
						"4:3",
						"1:1",
						"3:4",
						"9:16",
						"21:9"
					],
					"default": "16:9",
					"description": "Controls the approximate aspect ratio of the resulting video."
				},
				"resolution": {
					"type": "string",
					"enum": [
						"768P"
					],
					"default": "768P",
					"description": "Only 768P is supported: the video is generated at a 768px short edge; exact width and height follow the selected aspect ratio."
				},
				"seed": {
					"type": "integer",
					"minimum": 0,
					"maximum": 2147483647,
					"description": "Seed for reproducible generation. Random when omitted."
				}
			}
		}
	}
}
```