# inference.seedance-2.fast.img2vid.v1

Source: https://docs.prodia.com/job-types/inference-seedance-2-fast-img2vid-v1/

## Schema

```json
{
	"type": "object",
	"required": [
		"type",
		"config"
	],
	"additionalProperties": false,
	"properties": {
		"type": {
			"type": "string",
			"enum": [
				"inference.seedance-2.fast.img2vid.v1"
			]
		},
		"config": {
			"type": "object",
			"required": [
				"prompt"
			],
			"additionalProperties": false,
			"properties": {
				"first_frame": {
					"type": "string",
					"format": "filename",
					"example": "first_frame.png",
					"description": "Set the starting frame for the video. Use alone for first-frame mode, or pair with last_frame for first-and-last-frame mode."
				},
				"last_frame": {
					"type": "string",
					"format": "filename",
					"example": "last_frame.png",
					"description": "Set the ending frame for the video. Must be used together with first_frame."
				},
				"reference_images": {
					"type": "array",
					"minItems": 1,
					"maxItems": 9,
					"items": {
						"type": "string",
						"format": "filename",
						"example": "reference.png",
						"description": "Filename of a reference image."
					},
					"description": "Reference images for multimodal generation. 1-9 images. Mutually exclusive with first_frame/last_frame mode."
				},
				"reference_videos": {
					"type": "array",
					"minItems": 1,
					"maxItems": 3,
					"items": {
						"type": "string",
						"format": "filename",
						"example": "reference.mp4",
						"description": "Filename of a reference video. Must be mp4 or mov, 2-15 seconds, total of all videos must not exceed 15 seconds."
					},
					"description": "Reference videos for multimodal generation. 1-3 videos."
				},
				"reference_audios": {
					"type": "array",
					"minItems": 1,
					"maxItems": 3,
					"items": {
						"type": "string",
						"format": "filename",
						"example": "reference.wav",
						"description": "Filename of a reference audio. Must be wav or mp3, 2-15 seconds each, total must not exceed 15 seconds."
					},
					"description": "Reference audios for multimodal generation. 1-3 audios. Cannot be used alone — must be combined with at least one reference image or video."
				},
				"prompt": {
					"type": "string",
					"minLength": 3,
					"maxLength": 4096,
					"default": "a flying dragon over mountains",
					"description": "Description of desired output."
				},
				"resolution": {
					"type": "string",
					"enum": [
						"480p",
						"720p"
					],
					"default": "720p",
					"description": "This controls the general quality level of the output. Exact width and height will vary depending on the selected aspect ratio. For a video with approximately 480 or 720 pixel height use a 16:9 aspect ratio."
				},
				"duration": {
					"type": "integer",
					"minimum": -1,
					"maximum": 15,
					"default": 5,
					"description": "Duration of the video in seconds. Valid values are integers in [4, 15], or -1 to let the model pick a suitable length."
				},
				"watermark": {
					"type": "boolean",
					"default": false,
					"description": "When set to true a watermark is added indicating the output is AI generated."
				},
				"camera_fixed": {
					"type": "boolean",
					"default": false,
					"description": "When set to true the model is encouraged to keep the camera from moving. This is not guaranteed to work."
				},
				"generate_audio": {
					"type": "boolean",
					"default": true,
					"description": "When true the output video includes synchronized audio. When false a silent video is produced."
				},
				"return_last_frame": {
					"type": "boolean",
					"default": false,
					"description": "When true the last frame of the generated video is also returned as a PNG (last_frame.png) alongside the video."
				},
				"seed": {
					"type": "integer",
					"description": "A randomness initializer for image reproducability."
				}
			}
		}
	}
}
```