x264 ok / remux nok

{
  "name": "x264",
  "includeCustomFormatWhenRenaming": false,
  "specifications": [
    {
      "name": "x264",
      "implementation": "ReleaseTitleSpecification",
      "negate": false,
      "required": true,
      "fields": {
        "value": "[xh]\\.?264|\\bAVC(\\b|\\d)"
      }
    },
    {
      "name": "Remux",
      "implementation": "QualityModifierSpecification",
      "negate": true,
      "required": true,
      "fields": {
        "value": 5
      }
    }
  ]
}