Render Iterate

Immutable Catalog Entry

This descriptor comes from the active versioned Portal catalog.

WRITEffmpeg.render_iterate

• Contract tier: agent_ready
• Risk: write
• Catalog version: 2026-07-12.3
• Descriptor hash: fe703158bf989f6483f6f259e5fa76f05f583a9bdcf864e90d5bba3693e34c18

Use this to render, analyze, and boundedly iterate an approved social ad, testimonial, or offer card until its rubric threshold or iteration limit is reached. It queues a non-trivial workflow and never publishes results.

Request Body

{
  "jsonrpc": "2.0",
  "id": "ffmpeg-render-iterate-example",
  "method": "tools/call",
  "params": {
    "name": "ffmpeg.render_iterate",
    "arguments": {
      "render_type": "render_type_example",
      "primary_asset_id": "primary_asset_id_123",
      "cta": "",
      "hook": "",
      "price": "",
      "quote": "",
      "author": "",
      "quality": "",
      "headline": "",
      "priority": ""
    }
  }
}

Arguments Schema

{
  "type": "object",
  "required": [
    "render_type",
    "primary_asset_id"
  ],
  "properties": {
    "cta": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional call-to-action copy for the render."
    },
    "hook": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional short opening hook copy for a social render."
    },
    "price": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional price or offer copy for the render."
    },
    "quote": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional testimonial quotation copy for the render."
    },
    "author": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional testimonial attribution copy for the render."
    },
    "quality": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved render quality mode, normally draft or final."
    },
    "headline": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional headline copy for the render."
    },
    "priority": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional queue priority configured by the server, such as urgent or batch."
    },
    "strategy": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved iteration strategy controlling which bounded changes may be attempted."
    },
    "audio_lra": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Target loudness range used by normalization."
    },
    "fail_fast": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "When true, stop after the first non-recoverable QA failure."
    },
    "lock_audio": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "When true, iteration may not change audio controls."
    },
    "music_gain": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Background-music gain multiplier within server limits."
    },
    "voice_gain": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Voice-track gain multiplier within server limits."
    },
    "words_json": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": true
          }
        },
        {
          "type": "null"
        }
      ],
      "description": "Timed word objects containing word, start, and end values; provide only one caption source."
    },
    "render_type": {
      "type": "string",
      "description": "Approved iterative render type: social_ad, testimonial_clip, or offer_card."
    },
    "rubric_name": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Exact approved quality rubric name."
    },
    "brand_kit_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Existing local brand-kit identifier."
    },
    "captions_srt": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Inline SRT caption text; provide only one caption source."
    },
    "captions_vtt": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Inline WebVTT caption text; provide only one caption source."
    },
    "framing_mode": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved fit, fill, crop, or safe framing behavior."
    },
    "include_16_9": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "When true, add a 16:9 variant to the default social outputs."
    },
    "lock_framing": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "When true, iteration may not change framing controls."
    },
    "max_crop_pct": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum percentage of the source frame that iteration may crop."
    },
    "trim_silence": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "Whether the render pipeline should trim leading and trailing silence."
    },
    "ducking_ratio": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Compressor ratio used for voice-driven music ducking."
    },
    "lock_captions": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "When true, iteration may not change caption controls."
    },
    "highlight_mode": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved caption word-highlight behavior."
    },
    "max_iterations": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum bounded render-analysis iterations."
    },
    "music_asset_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Stable ID of the staged background music asset."
    },
    "music_gain_max": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum allowed value for this iteration control. Background-music gain multiplier within server limits."
    },
    "music_gain_min": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Minimum allowed value for this iteration control. Background-music gain multiplier within server limits."
    },
    "pass_threshold": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Rubric score that ends iteration successfully."
    },
    "voice_asset_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Stable ID of the staged voice or dialogue audio asset."
    },
    "audio_true_peak": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum true-peak target in dBTP."
    },
    "broll_asset_ids": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional ordered staged asset IDs used as supporting B-roll."
    },
    "caption_position": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved overlay or caption position name."
    },
    "min_duration_sec": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Minimum output duration iteration must preserve."
    },
    "primary_asset_id": {
      "type": "string",
      "description": "Stable ID of the primary staged media asset for the render."
    },
    "audio_target_lufs": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Target integrated loudness in LUFS."
    },
    "caption_box_color": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Safe FFmpeg color used for the text background box."
    },
    "caption_font_name": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Allowlisted server font filename or name."
    },
    "caption_font_size": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Font size in pixels within configured minimum and maximum bounds."
    },
    "caption_max_chars": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum characters per caption line within server limits."
    },
    "caption_max_lines": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum lines in one caption cue within server limits."
    },
    "caption_max_words": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum words in one caption cue within server limits."
    },
    "ducking_attack_ms": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Ducking compressor attack time in milliseconds."
    },
    "ducking_threshold": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Signal threshold used to trigger ducking."
    },
    "safe_zone_profile": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Approved platform safe-zone profile for caption placement."
    },
    "allow_trim_silence": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ],
      "description": "Whether iteration may enable silence trimming."
    },
    "caption_font_color": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Safe FFmpeg color used for text."
    },
    "caption_padding_px": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Caption box padding in pixels within server limits."
    },
    "ducking_release_ms": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Ducking compressor release time in milliseconds."
    },
    "caption_box_opacity": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Caption background opacity from 0.0 through 1.0."
    },
    "trim_silence_min_sec": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Minimum silence duration in seconds that the render pipeline may trim."
    },
    "caption_font_asset_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Optional staged font asset ID used for caption rendering."
    },
    "caption_font_size_max": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum allowed value for this iteration control. Font size in pixels within configured minimum and maximum bounds."
    },
    "caption_font_size_min": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Minimum allowed value for this iteration control. Font size in pixels within configured minimum and maximum bounds."
    },
    "caption_box_opacity_max": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Maximum allowed value for this iteration control. Caption background opacity from 0.0 through 1.0."
    },
    "caption_box_opacity_min": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Minimum allowed value for this iteration control. Caption background opacity from 0.0 through 1.0."
    },
    "caption_highlight_color": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "description": "Safe color used for highlighted caption words."
    },
    "caption_safe_zone_top_px": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Additional top safe-zone inset in pixels."
    },
    "trim_silence_threshold_db": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "description": "Silence detection threshold in decibels."
    },
    "caption_safe_zone_bottom_px": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "description": "Additional bottom safe-zone inset in pixels."
    }
  },
  "additionalProperties": false
}

Output Schema

{
  "type": "object",
  "required": [
    "job_id",
    "cache_hit"
  ],
  "properties": {
    "job_id": {
      "type": "string",
      "description": "Stable iterative-render job ID."
    },
    "result": {
      "type": "object",
      "description": "Completed iteration result when available from cache.",
      "additionalProperties": true
    },
    "cache_hit": {
      "type": "boolean",
      "description": "Whether a cached iterative result was reused."
    }
  },
  "additionalProperties": false
}

Code Examples

cURL

curl -X POST 'https://portal.madpanda3d.com/api/mcp' \
  -H 'Authorization: Bearer mad_live_***' \
  -H 'Content-Type: application/json' \
  -d '{
  "jsonrpc": "2.0",
  "id": "ffmpeg-render-iterate-example",
  "method": "tools/call",
  "params": {
    "name": "ffmpeg.render_iterate",
    "arguments": {
      "render_type": "render_type_example",
      "primary_asset_id": "primary_asset_id_123",
      "cta": "",
      "hook": "",
      "price": "",
      "quote": "",
      "author": "",
      "quality": "",
      "headline": "",
      "priority": ""
    }
  }
}'

Node.js

const response = await fetch('https://portal.madpanda3d.com/api/mcp', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer mad_live_***',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "jsonrpc": "2.0",
  "id": "ffmpeg-render-iterate-example",
  "method": "tools/call",
  "params": {
    "name": "ffmpeg.render_iterate",
    "arguments": {
      "render_type": "render_type_example",
      "primary_asset_id": "primary_asset_id_123",
      "cta": "",
      "hook": "",
      "price": "",
      "quote": "",
      "author": "",
      "quality": "",
      "headline": "",
      "priority": ""
    }
  }
}),
});
const data = await response.json();
console.log(data);

Python

import requests

url = 'https://portal.madpanda3d.com/api/mcp'
headers = {
    'Authorization': 'Bearer mad_live_***',
    'Content-Type': 'application/json',
}
payload = {
  "jsonrpc": "2.0",
  "id": "ffmpeg-render-iterate-example",
  "method": "tools/call",
  "params": {
    "name": "ffmpeg.render_iterate",
    "arguments": {
      "render_type": "render_type_example",
      "primary_asset_id": "primary_asset_id_123",
      "cta": "",
      "hook": "",
      "price": "",
      "quote": "",
      "author": "",
      "quality": "",
      "headline": "",
      "priority": ""
    }
  }
}
response = requests.post(url, headers=headers, json=payload, timeout=60)
print(response.json())

Example Responses

200 Success

{
  "ok": true,
  "message": "Tool ffmpeg.render_iterate executed successfully.",
  "note": "Response shape varies by MCP tool. Inspect live responses for exact fields."
}

502 Upstream Error

{
  "ok": false,
  "classification": "upstream_http_error",
  "message": "Upstream MCP returned a non-success status."
}