> ## Documentation Index > Fetch the complete documentation index at: https://docs.magnific.com/llms.txt > Use this file to discover all available pages before exploring further. # Happy Horse 1.0 - Edit video > Edit an existing video with natural-language instructions using Happy Horse 1.0, Alibaba's AI video editing model, optionally guided by up to 5 reference images. **Editing modes:** - **Instruction-based editing**: Provide `prompt` with editing instructions (e.g., "change the sky to sunset") - **Reference-image editing**: Provide `prompt` and `image_urls`, then reference images from the prompt using `@Image1`..`@Image5` (1-based, in array order) **Key features:** - 720P and 1080P resolution support - Up to 5 reference images - Output is capped at 15 seconds - Configurable audio handling: `auto` (regenerate when relevant) or `origin` (preserve input audio) ## OpenAPI ````yaml post /v1/ai/video-edit/happy-horse-1 openapi: 3.0.0 info: description: >- The Magnific API is your gateway to a vast collection of high-quality digital resources for your applications and projects. As a leading platform, it offers a wide range of graphics, including vectors, photos, illustrations, icons, PSD templates, and more, all curated by talented designers from around the world. title: Magnific API version: 1.0.0 servers: - description: B2B API Production V1 url: https://api.magnific.com security: - magnificApiKey: [] paths: /v1/ai/video-edit/happy-horse-1: post: tags: - video-edit summary: Happy Horse 1.0 - Edit video description: > Edit an existing video with natural-language instructions using Happy Horse 1.0, Alibaba's AI video editing model, optionally guided by up to 5 reference images. **Editing modes:** - **Instruction-based editing**: Provide `prompt` with editing instructions (e.g., "change the sky to sunset") - **Reference-image editing**: Provide `prompt` and `image_urls`, then reference images from the prompt using `@Image1`..`@Image5` (1-based, in array order) **Key features:** - 720P and 1080P resolution support - Up to 5 reference images - Output is capped at 15 seconds - Configurable audio handling: `auto` (regenerate when relevant) or `origin` (preserve input audio) operationId: create_video_happy_horse_1_edit requestBody: content: application/json: schema: $ref: '#/components/schemas/video-edit-request_1' required: true responses: '200': content: application/json: examples: success - created task: $ref: '#/components/examples/200-task-created' success - in progress task: $ref: '#/components/examples/200-task-in-progress' success - completed task: $ref: '#/components/examples/200-task-completed' success - failed task: $ref: '#/components/examples/200-task-failed' schema: $ref: >- #/components/schemas/_v1_ai_text_to_image_hyperflux_post_200_response description: OK - The task exists and the status is returned '400': content: application/json: examples: invalid_page: summary: Parameter 'page' is not valid value: message: Parameter 'page' must be greater than 0 invalid_query: summary: Parameter 'query' is not valid value: message: Parameter 'query' must not be empty invalid_filter: summary: Parameter 'filter' is not valid value: message: Parameter 'filter' is not valid generic_bad_request: summary: Bad Request value: message: Parameter ':attribute' is not valid schema: $ref: '#/components/schemas/get_all_style_transfer_tasks_400_response' application/problem+json: examples: invalid_page: summary: Parameter 'page' is not valid value: message: Validation error invalid_params: - field: page reason: Parameter 'page' must be greater than 0 - field: per_page reason: Parameter 'per_page' must be greater than 0 schema: $ref: >- #/components/schemas/get_all_style_transfer_tasks_400_response_1 description: >- Bad Request - The server could not understand the request due to invalid syntax. '401': content: application/json: examples: invalid_api_key: summary: API key is not valid value: message: Invalid API key missing_api_key: summary: API key is not provided value: message: Missing API key schema: $ref: '#/components/schemas/get_all_style_transfer_tasks_400_response' description: >- Unauthorized - The client must authenticate itself to get the requested response. '500': content: application/json: schema: $ref: '#/components/schemas/get_all_style_transfer_tasks_500_response' description: >- Internal Server Error - The server has encountered a situation it doesn't know how to handle. '503': content: application/json: schema: $ref: '#/components/schemas/get_all_style_transfer_tasks_503_response' description: Service Unavailable components: schemas: video-edit-request_1: description: > Edit an existing video using natural-language instructions with Happy Horse 1.0, optionally guided by up to 5 reference images. Reference images from the prompt using `@Image1`..`@Image5` tokens (1-based, in array order). Output is capped at 15 seconds. properties: webhook_url: description: > Optional callback URL that will receive asynchronous notifications whenever the task changes status. The payload sent to this URL is the same as the corresponding GET endpoint response, but without the data field. example: https://www.example.com/webhook format: uri type: string video_url: description: > URL of the source video to be edited. **Supported formats:** MP4, MOV with H.264 codec **Duration:** between 3 and 60 seconds (the output is capped at 15 seconds) **Frame rate:** greater than 8 fps **Dimensions:** longer side at most 2160 px and shorter side at least 320 px **Aspect ratio:** between 1:2.5 and 2.5:1 **Maximum file size:** 100 MB example: https://example.com/input-video.mp4 format: uri type: string prompt: description: > Text prompt describing the desired editing instructions. To reference an image from `image_urls` inside the prompt, use the tokens `@Image1`..`@Image5` (1-based, matching the array order). **Example:** "Replace the background with a futuristic cityscape at night" example: Replace the background with a futuristic cityscape at night maxLength: 2500 minLength: 1 type: string image_urls: description: > Up to 5 reference images that guide the edit. Reference them from the prompt using `@Image1`..`@Image5` (1-based, in array order). **Supported formats:** JPEG, JPG, PNG, WEBP **Minimum dimension:** 300 px **Aspect ratio:** between 1:2.5 and 2.5:1 **Maximum file size:** 10 MB per image example: - https://example.com/reference1.jpg items: format: uri type: string maxItems: 5 type: array resolution: $ref: '#/components/schemas/resolution' audio_setting: $ref: '#/components/schemas/audio-setting_1' seed: description: >- Random seed for reproducibility. Use the same seed with identical parameters to improve reproducibility (does not guarantee identical results). Leave unset for a random seed. example: 12345 maximum: 2147483647 minimum: 0 type: integer required: - prompt - video_url title: Video Edit - Happy Horse 1.0 type: object _v1_ai_text_to_image_hyperflux_post_200_response: example: data: task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED generated: - https://openapi-generator.tech - https://openapi-generator.tech properties: data: $ref: '#/components/schemas/task-detail_1' required: - data type: object get_all_style_transfer_tasks_400_response: example: message: message properties: message: type: string type: object get_all_style_transfer_tasks_400_response_1: properties: problem: $ref: >- #/components/schemas/get_all_style_transfer_tasks_400_response_1_problem type: object get_all_style_transfer_tasks_500_response: example: message: Internal Server Error properties: message: example: Internal Server Error type: string type: object get_all_style_transfer_tasks_503_response: example: message: Service Unavailable. Please try again later. properties: message: example: Service Unavailable. Please try again later. type: string type: object resolution: default: 1080P description: | Output video resolution: - `720P`: 720p HD (1280x720) - `1080P`: 1080p Full HD (1920x1080) enum: - 720P - 1080P type: string audio-setting_1: default: auto description: > Audio handling mode for the edited video: - `auto`: The model decides whether to regenerate audio based on the prompt — if the prompt involves audio descriptions, audio may be regenerated; otherwise the original audio is preserved - `origin`: Force-preserve the input video's original audio without regeneration enum: - auto - origin type: string task-detail_1: allOf: - $ref: '#/components/schemas/task' - properties: generated: items: description: URL of the generated image format: uri type: string type: array required: - generated type: object example: task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED generated: - https://openapi-generator.tech - https://openapi-generator.tech get_all_style_transfer_tasks_400_response_1_problem: properties: message: example: Validation error type: string invalid_params: items: $ref: >- #/components/schemas/get_all_style_transfer_tasks_400_response_1_problem_invalid_params_inner type: array required: - invalid_params - message type: object task: example: task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED properties: task_id: description: Task identifier format: uuid type: string status: description: Task status enum: - CREATED - IN_PROGRESS - COMPLETED - FAILED type: string required: - status - task_id type: object get_all_style_transfer_tasks_400_response_1_problem_invalid_params_inner: properties: name: description: Name of the invalid parameter. example: page type: string field: description: Field of the invalid parameter. Mirrors `name`. example: page type: string reason: example: Parameter 'page' must be greater than 0 type: string required: - field - name - reason type: object examples: 200-task-created: summary: Success - Task created value: data: generated: [] task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: CREATED 200-task-in-progress: summary: Success - Task in progress value: data: generated: [] task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: IN_PROGRESS 200-task-completed: summary: Success - Task completed value: data: generated: - https://ai-statics.freepik.com/completed_task_image.jpg task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: COMPLETED 200-task-failed: summary: Success - Task failed value: data: generated: [] task_id: 046b6c7f-0b8a-43b9-b35d-6489e6daee91 status: FAILED securitySchemes: magnificApiKey: description: > Your Magnific API key. Required for authentication. [Learn how to obtain an API key](https://docs.magnific.com/quickstart) in: header name: x-magnific-api-key type: apiKey ````