---
title: "media.upload-init@1 · OpenVibe.Services"
canonical: "https://openvibe.services/docs/contracts/media.upload-init"
updated: null
---

# media.upload-init@1 · OpenVibe.Services

HTML: [media.upload-init@1 · OpenVibe.Services](https://openvibe.services/docs/contracts/media.upload-init)

# MediaUploadInit `media.upload-init@1`

Generated at 2026-11-13 06:25:48 UTC from [`openvibe-contracts v0.419.0`](https://github.com/OpenVibers/OpenVibe.Contracts/tree/v0.419.0) and [`openvibe-sdk v0.161.0`](https://github.com/OpenVibers/OpenVibe.SDK/tree/v0.161.0).

- Version: 1.0.0
- Owner: media
- Visibility: public
- Status: active
- Compatibility: backward
- Schema: [`https://openvibe.network/contracts/media/upload-init.v1.json`](/docs/contracts/media.upload-init.json)

The object and its presigned multipart session after POST /api/v2/:app/objects. Send parts to part\_url\_template in any order, then complete.

## Fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| `id` | string | yes |  |  |
| `object` | [media.object](/docs/contracts/media.object) | yes |  |  |
| `upload` | object | yes |  |  |
| `upload.method` | const | yes |  | - `= "multipart"` |
| `upload.multipart` | [media.upload](/docs/contracts/media.upload) | yes |  |  |
| `upload.complete_url` | string | yes |  |  |
| `upload.multipart_url` | string |  |  |  |

## Examples

From the contract's own test fixtures: valid ones validate, rejected ones must fail.

 Valid: basic

~~~~
{
  "id": "med_01K5WZX7S7Q4D2B8N3M6V1C9TZ",
  "object": {
    "id": "med_01K5WZX7S7Q4D2B8N3M6V1C9TZ",
    "media_ref": {
      "media_id": "med_01K5WZX7S7Q4D2B8N3M6V1C9TZ"
    },
    "legacy_ref": null,
    "app_id": "prj_01K5WZX7S7Q4D2B8N3M6V1C9TA",
    "namespace": "app.prj_01K5WZX7S7Q4D2B8N3M6V1C9TA.avatars",
    "kind": "file",
    "owner": {
      "subject": null,
      "app": "prj_01K5WZX7S7Q4D2B8N3M6V1C9TA",
      "user_id": null
    },
    "visibility": "private",
    "lifecycle_status": "ready",
    "mime_type": "image/png",
    "size_bytes": 48213,
    "content_hash": "3f1c0b8e2a9d7c6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e0d9c8b7a6f5e4d3c2b",
    "metadata": {
      "filename": "a.png"
    },
    "held": false,
    "readiness": {
      "metadata": true,
      "bytes_verified": true,
      "playable": false,
      "reason": "not_playback_kind"
    },
    "public_url": null,
    "created_at": "2026-09-26 08:00:00",
    "updated_at": "2026-09-26 08:00:01",
    "deleted_at": null,
    "locations": [
      {
        "provider": "local",
        "storage_class": "hot",
        "state": "present",
        "size_bytes": 48213,
        "verified_at": "2026-09-26 08:00:01",
        "canonical": true
      }
    ]
  },
  "upload": {
    "method": "multipart",
    "complete_url": "https://openvibe.media/api/v2/demo/objects/med_01K5WZX7S7Q4D2B8N3M6V1C9TZ/complete",
    "multipart": {
      "upload_id": "mup_01K5WZX7S7Q4D2B8N3M6V1C9TZ",
      "object_id": "med_01K5WZX7S7Q4D2B8N3M6V1C9TZ",
      "status": "active",
      "part_size": 8388608,
      "total_size": 8388608,
      "parts_expected": 1,
      "expires_at": "2026-11-10T00:00:00Z",
      "created_at": "2026-11-09 00:00:00",
      "parts": [],
      "received_bytes": 0,
      "missing": [
        1
      ]
    }
  }
}
~~~~

Rejected: basic

~~~~
{
  "id": "med_01K5WZX7S7Q4D2B8N3M6V1C9TZ",
  "upload": {
    "method": "multipart"
  }
}
~~~~

## Validate

~~~~
const contracts = require('openvibe-contracts');
contracts.validate('media.upload-init@1', value);   // { valid, errors: [{ path, message }] }
~~~~