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API-Referenz
API-Referenz

Seedance Text zu Video

Verwenden Sie den Endpunkt „Text zu Video", um einen asynchronen Task zu erstellen.

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01

Übersicht

Verwenden Sie den Endpunkt „Text zu Video" mit einem unterstützten Modell. Verwenden Sie die zurückgegebene Task-ID, um den Status abzurufen, oder geben Sie callback_url für die unten dokumentierten Zustellungen an.

Schnellstart

  1. Erstellen Sie einen API-Schlüssel und setzen Sie ihn als RUNAPI_API_KEY.
  2. Wählen Sie ein unterstütztes Modell und senden Sie eine POST-Anfrage, deren Body dem Schema dieses Modells entspricht.
  3. Speichern Sie die zurückgegebene Task-ID und fragen Sie den Status ab, bis ein Endzustand erreicht ist, oder verarbeiten Sie die unten dokumentierten Callbacks.

Endpunkt

POST /api/v1/seedance/text_to_video
Basis-URL
https://runapi.ai
API-Version
v1
Authentifizierung
Authorization: Bearer YOUR_API_TOKEN
02

Unterstützte Modelle

Öffnen Sie eine Modellseite für aktuelle Preise, Ratenlimits und Details zur kommerziellen Nutzung.

03

Anfrage-Schema

JSON-Body

Felder und zulässige Werte hängen vom ausgewählten Modell ab. Wenn angegeben, empfängt callback_url die unten dokumentierten Task-Zustellungen.

seedance-1.5-pro11 Felder
aspect_ratiostring
Optional Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9
callback_urlstring
Optional
duration_secondsinteger
Erforderlich Bereich: 4 - 12
enable_safety_checkerboolean
Optional
generate_audioboolean
Optional
lock_cameraboolean
Optional
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 480p, 720p, 1080p
promptstring
Optional
seedinteger
Optional Bereich: -1 - 2147483647
source_image_urlsarray
Optional Elementlimit: 2
seedance-2-mini13 Felder
aspect_ratiostring
Optional Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, auto
callback_urlstring
Optional
duration_secondsinteger
Optional Standard: 5 Bereich: 4 - 15
first_frame_image_urlstring
Optional
generate_audioboolean
Optional
last_frame_image_urlstring
Optional
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 480p, 720p
promptstring
Optional
reference_audio_urlsarray
Optional Elementlimit: 3
reference_image_urlsarray
Optional Elementlimit: 9
reference_video_urlsarray
Optional Elementlimit: 3
web_searchboolean
Optional
seedance-2.014 Felder
aspect_ratiostring
Optional Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, auto
callback_urlstring
Optional
duration_secondsinteger
Optional Standard: 5 Bereich: 4 - 15
enable_safety_checkerboolean
Optional
first_frame_image_urlstring
Optional
generate_audioboolean
Optional
last_frame_image_urlstring
Optional
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 480p, 720p, 1080p, 4k
promptstring
Optional
reference_audio_urlsarray
Optional Elementlimit: 3
reference_image_urlsarray
Optional Elementlimit: 9
reference_video_urlsarray
Optional Elementlimit: 3
web_searchboolean
Optional
seedance-2.0-fast14 Felder
aspect_ratiostring
Optional Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, auto
callback_urlstring
Optional
duration_secondsinteger
Optional Standard: 5 Bereich: 4 - 15
enable_safety_checkerboolean
Optional
first_frame_image_urlstring
Optional
generate_audioboolean
Optional
last_frame_image_urlstring
Optional
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 480p, 720p
promptstring
Optional
reference_audio_urlsarray
Optional Elementlimit: 3
reference_image_urlsarray
Optional Elementlimit: 9
reference_video_urlsarray
Optional Elementlimit: 3
web_searchboolean
Optional
seedance-2.516 Felder
aspect_ratiostring
Optional

Ausgabe-Seitenverhältnis; auto lässt RunAPI es auswählen.

Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, auto Standard: auto
callback_urlstring
Optional

Webhook-URL für asynchrone Task-Updates.

duration_secondsinteger
Optional

Videodauer in Sekunden; -1 wählt die Dauer automatisch aus.

Zulässige Werte: -1, 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 Standard: 5
enable_safety_checkerboolean
Optional

Ob RunAPI generierten Inhalt auf Sicherheit prüft.

first_frame_image_urlstring
Optional

Öffentliche Bild-URL des ersten Frames für die frame-geführte Generierung.

generate_audioboolean
Optional

Ob synchronisiertes Audio generiert werden soll.

Standard: true
last_frame_image_urlstring
Optional

Öffentliche Bild-URL des letzten Frames; erfordert first_frame_image_url.

modelstring
Erforderlich

RunAPI-Modellbezeichner.

output_formatstring
Optional

Ausgabe-Videocontainerformat.

Zulässige Werte: mp4, mov Standard: mp4
output_resolutionstring
Optional

Ausgabe-Videoauflösung.

Zulässige Werte: 480p, 720p, 1080p Standard: 720p
promptstring
Erforderlich

Prompt zur Videogenerierung.

Bereich: 3 - 30000
reference_audio_urlsarray
Optional

Öffentliche Referenzaudio-URLs; bis zu 10 Audiodateien.

Elementlimit: 10
reference_image_urlsarray
Optional

Öffentliche Referenzbild-URLs; bis zu 30 Bilder.

Elementlimit: 30
reference_video_urlsarray
Optional

Öffentliche Referenzvideo-URLs; bis zu 10 Videos.

Elementlimit: 10
return_last_frameboolean
Optional

Ob das letzte Bild des generierten Videos zurückgegeben werden soll.

Standard: false
web_searchboolean
Optional

Ob der Prompt durch eine Websuche angereichert werden soll.

seedance-v1-pro10 Felder
aspect_ratiostring
Optional Zulässige Werte: 1:1, 4:3, 3:4, 16:9, 9:16, 21:9
callback_urlstring
Optional
duration_secondsinteger
Erforderlich Zulässige Werte: 5, 10
enable_safety_checkerboolean
Optional
first_frame_image_urlstring
Optional
lock_cameraboolean
Optional
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 480p, 720p, 1080p
promptstring
Optional
seedinteger
Optional
seedance-v1-pro-fast8 Felder
callback_urlstring
Optional
duration_secondsinteger
Erforderlich Zulässige Werte: 5, 10
enable_safety_checkerboolean
Optional
first_frame_image_urlstring
Erforderlich
modelstring
Optional
output_resolutionstring
Optional Zulässige Werte: 720p, 1080p
promptstring
Optional
seedinteger
Optional Bereich: -1 - 2147483647

Bedingte Regeln

Diese Anforderungen gelten, wenn alle aufgeführten Bedingungen zutreffen.

  1. Wenn first_frame_image_url = {"present" => true}, model = seedance-2.5
    Erforderlich
    Nicht akzeptiert
    reference_image_urls, reference_video_urls, reference_audio_urls
  2. Wenn last_frame_image_url = {"present" => true}, model = seedance-2.5
    Erforderlich
    first_frame_image_url
    Nicht akzeptiert
    reference_image_urls, reference_video_urls, reference_audio_urls
  3. Wenn model = seedance-1.5-pro
    Erforderlich
    Nicht akzeptiert
    first_frame_image_url, last_frame_image_url, reference_image_urls, reference_video_urls, reference_audio_urls, web_search, return_last_frame, output_format
  4. Wenn model = seedance-2-mini
    Erforderlich
    Nicht akzeptiert
    source_image_urls, lock_camera, seed, enable_safety_checker, return_last_frame, output_format
  5. Wenn model = seedance-2.0
    Erforderlich
    Nicht akzeptiert
    source_image_urls, lock_camera, seed, return_last_frame, output_format
  6. Wenn model = seedance-2.0-fast
    Erforderlich
    Nicht akzeptiert
    source_image_urls, lock_camera, seed, return_last_frame, output_format
  7. Wenn model = seedance-2.5
    Erforderlich
    Nicht akzeptiert
    source_image_urls, lock_camera, seed
  8. Wenn model = seedance-v1-pro
    Erforderlich
    Nicht akzeptiert
    source_image_urls, last_frame_image_url, reference_image_urls, reference_video_urls, reference_audio_urls, web_search, generate_audio, return_last_frame, output_format
  9. Wenn model = seedance-v1-pro-fast
    Erforderlich
    Nicht akzeptiert
    aspect_ratio, source_image_urls, lock_camera, last_frame_image_url, reference_image_urls, reference_video_urls, reference_audio_urls, web_search, generate_audio, return_last_frame, output_format
04

Annahme erstellen

HTTP 202

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "processing"
      ],
      "type": "string"
    },
    "task_replayed": {
      "type": "boolean"
    }
  },
  "required": [
    "id",
    "status",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
05

Abfrage wird verarbeitet

HTTP 200

GET /api/v1/seedance/text_to_video/:id

Antwort-Schema
JSON 
{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "processing"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
06

Abfrage abgeschlossen

HTTP 200

GET /api/v1/seedance/text_to_video/:id

Antwort-Schema
JSON 
{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "id": {
      "type": "string"
    },
    "last_frame_image_url": {
      "type": "string",
      "x-runapi-generated-media": true
    },
    "status": {
      "enum": [
        "completed"
      ],
      "type": "string"
    },
    "videos": {
      "items": {
        "properties": {
          "url": {
            "type": "string",
            "x-runapi-generated-media": true
          }
        },
        "required": [
          "url"
        ],
        "type": "object",
        "unevaluatedProperties": false
      },
      "type": "array"
    }
  },
  "required": [
    "id",
    "status",
    "videos",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
07

Abfrage fehlgeschlagen

HTTP 200

GET /api/v1/seedance/text_to_video/:id

Antwort-Schema
JSON 
{
  "properties": {
    "billing": {
      "properties": {
        "refund": {
          "oneOf": [
            {
              "properties": {
                "refunded_at": {
                  "type": "string"
                }
              },
              "required": [
                "refunded_at"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "reservation": {
          "oneOf": [
            {
              "properties": {
                "amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "amount_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        },
        "settlement": {
          "oneOf": [
            {
              "properties": {
                "amount_micro_cents": {
                  "type": "integer"
                },
                "charged_amount_cents": {
                  "type": "integer"
                }
              },
              "required": [
                "charged_amount_cents",
                "amount_micro_cents"
              ],
              "type": "object",
              "unevaluatedProperties": false
            },
            {
              "enum": [
                null
              ]
            }
          ]
        }
      },
      "required": [
        "reservation",
        "settlement",
        "refund"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    "error": {
      "type": "string"
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "failed"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "error",
    "billing"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": "Task processing failed.",
  "id": "tsk_reference_demo",
  "status": "failed"
}
08

Kunden-Callback: abgeschlossen

HTTP 200

POST callback_url

Antwort-Schema
JSON 
{
  "properties": {
    "id": {
      "type": "string"
    },
    "last_frame_image_url": {
      "type": "string",
      "x-runapi-generated-media": true
    },
    "status": {
      "enum": [
        "completed"
      ],
      "type": "string"
    },
    "videos": {
      "items": {
        "properties": {
          "url": {
            "type": "string",
            "x-runapi-generated-media": true
          }
        },
        "required": [
          "url"
        ],
        "type": "object",
        "unevaluatedProperties": false
      },
      "type": "array"
    }
  },
  "required": [
    "id",
    "status",
    "videos"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
09

Kunden-Callback: fehlgeschlagen

HTTP 200

POST callback_url

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "oneOf": [
        {
          "type": "string"
        },
        {
          "properties": {
            "code": {
              "type": "string"
            },
            "limit_cents": {
              "type": "integer"
            },
            "message": {
              "type": "string"
            },
            "reset_at": {
              "format": "date-time",
              "type": [
                "string",
                "null"
              ]
            },
            "used_cents": {
              "type": "integer"
            },
            "window": {
              "enum": [
                "1h",
                "1d",
                "7d",
                "daily",
                "weekly",
                "monthly",
                "lifetime"
              ],
              "type": "string"
            }
          },
          "required": [
            "code",
            "message"
          ],
          "type": "object",
          "unevaluatedProperties": false
        }
      ]
    },
    "id": {
      "type": "string"
    },
    "status": {
      "enum": [
        "failed"
      ],
      "type": "string"
    }
  },
  "required": [
    "id",
    "status",
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": {
    "code": "generation_failed",
    "message": "Task processing failed."
  },
  "id": "tsk_reference_demo",
  "status": "failed"
}
10

Fehler

HTTP 401

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Authentication required"
}
11

Fehler

HTTP 401

GET /api/v1/seedance/text_to_video/:id

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Authentication required"
}
12

Fehler

HTTP 400

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "oneOf": [
    {
      "properties": {
        "error": {
          "description": "Für Menschen lesbare Fehlermeldung.",
          "type": "string"
        }
      },
      "required": [
        "error"
      ],
      "type": "object",
      "unevaluatedProperties": false
    },
    {
      "properties": {
        "error": {
          "description": "Menschenlesbare Validierungszusammenfassung.",
          "type": "string"
        },
        "errors": {
          "additionalProperties": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "description": "Validierungsmeldungen nach öffentlichem Anforderungsfeld gegliedert, mit einem Array menschenlesbarer Zeichenketten für jedes Feld.",
          "type": "object"
        }
      },
      "required": [
        "error",
        "errors"
      ],
      "type": "object",
      "unevaluatedProperties": false
    }
  ]
}

Antwortbeispiel

JSON 
{
  "error": "model must be one of: seedance-1.5-pro, seedance-2-mini, seedance-2.0, seedance-2.0-fast, seedance-2.5, seedance-v1-pro, seedance-v1-pro-fast"
}
13

Fehler

HTTP 402

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Insufficient balance"
}
14

Fehler

HTTP 429

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "API key credit limit exceeded"
}
15

Fehler

HTTP 409

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "The request uses features that are not supported for the selected model"
}
16

Fehler

HTTP 429

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Rate limit reached. Please retry later."
}
17

Fehler

HTTP 503

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Service under maintenance, please try again later"
}
18

Fehler

HTTP 504

POST /api/v1/seedance/text_to_video

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "The request timed out"
}
19

Fehler

HTTP 404

GET /api/v1/seedance/text_to_video/:id

Antwort-Schema
JSON 
{
  "properties": {
    "error": {
      "description": "Für Menschen lesbare Fehlermeldung.",
      "type": "string"
    }
  },
  "required": [
    "error"
  ],
  "type": "object",
  "unevaluatedProperties": false
}

Antwortbeispiel

JSON 
{
  "error": "Task with id 'tsk_reference_demo' not found"
}
20

Generierte Code-Beispiele

Verwende cURL direkt oder installiere ein SDK für deine Programmiersprache. Jedes Beispiel übermittelt die in dieser Referenz gezeigte validierte Anfrage.

Installieren

Shell 
pip install runapi-seedance
PYTHON 
import os
from runapi.seedance import SeedanceClient

client = SeedanceClient(api_key=os.environ["RUNAPI_API_KEY"])
task = client.text_to_video.create(
  model="seedance-1.5-pro",
  duration_seconds=5,
  prompt="A time-lapse of clouds moving over a mountain lake."
)