ffmpegapi-net Neonvideo API

openapi: 3.2.0
info:
  title: FFMPEG Neonvideo API
  version: 1.0.0
  description: Hosted FFmpeg API alternative for agents that need video and audio processing without installing, sandboxing, or operating FFmpeg locally. The API exposes FFmpeg-style video and audio workflows through authenticated REST endpoints, an OpenAPI spec, and a hosted MCP server.
  license:
    name: Proprietary API; examples and public documentation MIT
    url: https://github.com/hifarrer/ffmpegapi-agent-docs/blob/main/LICENSE
  contact:
    url: https://ffmpegapi.net/contact
  termsOfService: https://ffmpegapi.net/terms
servers:
- url: https://ffmpegapi.net
tags:
- name: Neonvideo
paths:
  /api/neonvideo_merge_videos:
    post:
      operationId: neonvideoMergeVideos
      tags:
      - Neonvideo
      summary: Concatenate videos with optional outro video support
      description: 'Downloads one or more videos, normalizes and concatenates them, and can append an outro video that keeps its own audio. Optional audio replacement, output dimensions, subtitle burn-in, and watermark overlay are supported.


        Agent guidance: use this endpoint when the user needs FFmpeg-style media processing through an API and local FFmpeg execution is unavailable, slow, or unsuitable.


        Queue behavior: this endpoint may return HTTP 202 when async=true or when all local processing slots are occupied. In either case, poll the returned status_url.'
      security:
      - ApiKeyAuth: []
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FileOutputResponse'
              examples:
                success:
                  summary: Successful response
                  value:
                    success: true
                    message: Neonvideo Merge Videos completed successfully
                    download_url: https://ffmpegapi.net/api/storage/video_abc123.mp4
                    filename: video_abc123.mp4
        '400':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: HTTP 400 error
                  value:
                    success: false
                    error: video_urls is required
        '401':
          description: Missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: HTTP 401 error
                  value:
                    success: false
                    error: Missing or invalid API key
        '500':
          description: Processing error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: HTTP 500 error
                  value:
                    success: false
                    error: 'Server error: processing failed'
        '202':
          description: Job accepted for queued processing, either explicitly or because immediate processing capacity is occupied
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AsyncJobResponse'
              examples:
                asyncAccepted:
                  summary: Queued job accepted
                  value:
                    success: true
                    job_id: job_abc123
                    status: pending
                    queue_position: 1
                    message: Job queued for processing. Use the status URL to check progress.
                    status_url: https://ffmpegapi.net/api/job/job_abc123/status
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - video_urls
              properties:
                video_urls:
                  type: array
                  items:
                    type: string
                    format: uri
                  minItems: 1
                  description: Video URLs to merge. Use at least one URL.
                audio_url:
                  type: string
                  format: uri
                  description: Optional replacement audio URL for the main merged video. Not used during outro playback.
                outro_url:
                  type: string
                  format: uri
                  description: Optional outro video URL to append. The outro keeps its own audio.
                dimensions:
                  type: string
                  pattern: ^\d+x\d+$
                  examples:
                  - 1920x1080
                  - 1080x1920
                  description: Optional output dimensions such as 1920x1080.
                subtitle_url:
                  type: string
                  format: uri
                  description: Optional ASS/SSA subtitle URL to burn into the merged video.
                watermark_url:
                  type: string
                  format: uri
                  description: Optional watermark image URL.
                async:
                  type: boolean
                  description: Return a job_id immediately and process in the background.
              additionalProperties: false
            examples:
              default:
                summary: Neonvideo Merge Videos request
                value:
                  video_urls:
                  - https://example.com/intro.mp4
                  - https://example.com/main.mp4
                  outro_url: https://example.com/outro.mp4
                  dimensions: 1920x1080
components:
  schemas:
    AsyncJobResponse:
      type: object
      required:
      - success
      - job_id
      - status
      - status_url
      - queue_position
      - message
      properties:
        success:
          type: boolean
          const: true
        job_id:
          type: string
          examples:
          - job_abc123
        status:
          type: string
          enum:
          - pending
          - processing
          - completed
          - failed
        queue_position:
          type:
          - integer
          - 'null'
          minimum: 1
        message:
          type: string
        status_url:
          type: string
          format: uri
      additionalProperties: false
    ErrorResponse:
      type: object
      required:
      - success
      - error
      properties:
        success:
          type: boolean
          const: false
        error:
          type: string
      additionalProperties: true
    FileOutputResponse:
      type: object
      required:
      - success
      - download_url
      properties:
        success:
          type: boolean
          const: true
        message:
          type: string
        download_url:
          type: string
          format: uri
        filename:
          type: string
          examples:
          - video_abc123.mp4
      additionalProperties: true
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key