{"servers":[{"url":"https://api.modellix.ai/api/v1/bytedance/seedance-2.5-r2v"}],"post":{"description":"[Core Function] Seedance 2.5 R2V is ByteDance Dreamina Seedance 2.5 reference-to-video generation from up to 30 reference images. [Strengths] It supports optional reference audio, fixed or adaptive aspect ratio, 480p/720p/1080p, 4-30 second duration, and mp4 or mov output. [Best For] Highly recommended for: multi-image character consistency and image-led storytelling on Seedance 2.5. [Limitations] Do NOT send first_frame_image, last_frame_image, or video_urls. Do NOT use audio_urls alone. Do NOT use this model when the user requires 4k output. [Routing] Prefer this model when the user provides reference images without a driving video. Use Seedance 2.5 I2V for first-frame or first-and-last-frame animation, Seedance 2.5 T2V for text-only requests, and Seedance 2.5 V2V when reference video is required.","operationId":"seedance25R2vAsync","requestBody":{"content":{"application/json":{"examples":{"reference_images":{"description":"Reference-to-video may use a fixed ratio or adaptive. Duration is 4-30.","summary":"Reference-image generation","value":{"audio_urls":["https://example.com/voice.mp3"],"duration":10,"output_format":"mov","prompt":"Combine @Image1 and @Image2 into one cinematic shot. Follow the rhythm of @Audio1.","ratio":"16:9","reference_images":["https://example.com/person.jpg","https://example.com/scene.jpg"]}}},"schema":{"description":"Seedance 2.5 reference-to-video. `reference_images` is required. Do not pass `first_frame_image` or `last_frame_image`.","properties":{"audio_urls":{"description":"Optional. Reference audio URLs (1-10). Must accompany reference_images; audio-only is not supported.","example":["https://example.com/voice.mp3"],"items":{"format":"uri","type":"string"},"maxItems":10,"minItems":1,"type":"array"},"camera_fixed":{"default":false,"description":"Whether to keep the camera fixed during generation","example":false,"type":"boolean"},"duration":{"default":5,"description":"Video duration in seconds. Allowed values are integers from 4 to 30","enum":[4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30],"example":5,"type":"integer"},"execution_expires_after":{"default":172800,"description":"Task expiration time in seconds","example":172800,"maximum":259200,"minimum":3600,"type":"integer"},"generate_audio":{"default":true,"description":"Whether to generate an audio track with the video","example":true,"type":"boolean"},"omni_reference_task_type":{"default":"auto","description":"Task type hint for multimodal reference only (requires `reference_images`). Do not pass this field for first-frame or first-last-frame generation. `auto` infers the type from the prompt and inputs. `reference` generates a new video from reference images; `ratio` and `duration` have no special constraints.","enum":["auto","reference"],"example":"auto","type":"string"},"output_format":{"default":"mp4","description":"Output video container. mp4 for general playback; mov for higher color precision in editing workflows","enum":["mp4","mov"],"example":"mp4","type":"string"},"prompt":{"description":"Optional. Video description. Maximum 10000 characters. Use @Image1 and @Audio1 when referencing inputs.","example":"Animate the scene gently with natural motion","maxLength":10000,"minLength":1,"type":"string"},"ratio":{"default":"adaptive","description":"Aspect ratio of the generated video.","enum":["16:9","4:3","1:1","3:4","9:16","21:9","adaptive"],"example":"adaptive","type":"string"},"reference_images":{"description":"Required. Reference image URLs (1-30). Do not pass first_frame_image or last_frame_image.","example":["https://example.com/a.jpg","https://example.com/b.jpg"],"items":{"format":"uri","type":"string"},"maxItems":30,"minItems":1,"type":"array"},"resolution":{"default":"720p","description":"Specifies the resolution tier for the generated video. Seedance 2.5 supports 480p, 720p, and 1080p","enum":["480p","720p","1080p"],"example":"720p","type":"string"},"return_last_frame":{"default":false,"description":"Whether to return the last frame of the generated video","example":false,"type":"boolean"},"seed":{"default":-1,"description":"Random number seed for reproducibility. Use -1 for random. Identical seeds cannot guarantee completely identical results","example":-1,"maximum":4294967295,"minimum":-1,"type":"integer"}},"required":["reference_images"],"type":"object"}}},"required":true},"responses":{"200":{"content":{"application/json":{"schema":{"properties":{"code":{"description":"Response code, 0 indicates success","example":0,"type":"integer"},"data":{"description":"Detailed data about the submitted asynchronous task.","properties":{"get_result":{"description":"API information to query the task result","properties":{"method":{"description":"HTTP method","example":"GET","type":"string"},"url":{"description":"Full URL to query the task result","example":"https://api.modellix.ai/api/v1/tasks/task-abc123","type":"string"}},"type":"object"},"model_id":{"description":"Model ID","example":"model-123","type":"string"},"status":{"description":"Task status","enum":["pending","processing"],"example":"pending","type":"string"},"task_id":{"description":"Unique task identifier","example":"task-abc123","type":"string"}},"required":["status","task_id","model_id"],"type":"object"},"message":{"description":"Response message","example":"success","type":"string"}},"required":["code","message","data"],"type":"object"}}},"description":"Task submitted successfully"}},"summary":"Seedance 2.5 R2V","x-mint":{"href":"bytedance/seedance-2-5-r2v"}}}