{
  "name": "media.addVariant \u2014 download 1080p with the English audio muxed in",
  "description": "The result is an ordinary task that appears in the list like any other download.",
  "request": {
    "jsonrpc": "2.0",
    "id": 62,
    "method": "media.addVariant",
    "params": {
      "manifestUrl": "https://cdn.example.org/v/master.m3u8",
      "variantId": "v-1080p",
      "audioVariantId": "a-en",
      "spec": {
        "url": "https://cdn.example.org/v/master.m3u8",
        "filename": "episode-42.mkv",
        "categoryId": "video",
        "startMode": "now"
      }
    }
  },
  "response": {
    "jsonrpc": "2.0",
    "id": 62,
    "result": {
      "taskId": "$uuid",
      "state": "connecting",
      "estimatedBytes": 1923000000
    }
  },
  "assertions": [
    "spec.url is ignored: the manifest and variant determine the source",
    "a DRM-protected variant is refused with -32602 rather than started and failed later",
    "segments are fetched in parallel and muxed with ffmpeg into one container"
  ]
}