create-job Settings CaptionDescriptions destinationType Error with a template

You probably need to change File Group to Apple HLS output group.

Please check if caption is a separate stream. As captions can't be part of video/audio stream. It should be separate:

"OutputGroups": [
      {
        "Name": "Apple HLS",
        "Outputs": [
          {
            "ContainerSettings": {
              "Container": "M3U8",
              "M3u8Settings": {}
            },
            "VideoDescription": {
              "CodecSettings": {
                "Codec": "H_264",
                "H264Settings": {
                  "MaxBitrate": 600000,
                  "RateControlMode": "QVBR",
                  "SceneChangeDetect": "TRANSITION_DETECTION"
                }
              }
            },
            "AudioDescriptions": [
              {
                "CodecSettings": {
                  "Codec": "AAC",
                  "AacSettings": {
                    "Bitrate": 96000,
                    "CodingMode": "CODING_MODE_2_0",
                    "SampleRate": 48000
                  }
                }
              }
            ],
            "OutputSettings": {
              "HlsSettings": {}
            },
            "NameModifier": "_1"
          },
          {
            "ContainerSettings": {
              "Container": "M3U8",
              "M3u8Settings": {}
            },
            "OutputSettings": {
              "HlsSettings": {}
            },
            "NameModifier": "_2",
            "CaptionDescriptions": [
              {
                "CaptionSelectorName": "Captions Selector 1",
                "DestinationSettings": {
                  "DestinationType": "WEBVTT",
                  "WebvttDestinationSettings": {}
                }
              }
            ]
          }
        ],
        "OutputGroupSettings": {
          "Type": "HLS_GROUP_SETTINGS",
          "HlsGroupSettings": {
            "SegmentLength": 10,
            "Destination": "s3://111111/Output_temp",
            "MinSegmentLength": 0
          }
        }
      }
    ]

Please describe your process in a bit more details.

I tried to create job manually:

    {
   "Queue": "arn:aws:mediaconvert:region:11111111:queues/Default",
  "UserMetadata": {},
  "Role": "arn:aws:iam::1111111:role/service-role/MediaConvert_Default_Role",
  "Settings": {
  "TimecodeConfig": {
     "Source": "ZEROBASED"
      },
    "OutputGroups": [
      {
       "Name": "Apple HLS",
        "Outputs": [
        {
           "ContainerSettings": {
             "Container": "M3U8",
            "M3u8Settings": {}
           },
            "VideoDescription": {
             "CodecSettings": {
               "Codec": "H_264",
               "H264Settings": {
              "MaxBitrate": 500000,
              "RateControlMode": "QVBR",
              "SceneChangeDetect": "TRANSITION_DETECTION"
            }
          }
        },
        "OutputSettings": {
          "HlsSettings": {}
        },
        "NameModifier": "_1"
      },
      {
        "ContainerSettings": {
          "Container": "M3U8",
          "M3u8Settings": {}
        },
        "OutputSettings": {
          "HlsSettings": {}
        },
        "NameModifier": "_2",
        "CaptionDescriptions": [
          {
            "CaptionSelectorName": "Captions Selector 1",
            "DestinationSettings": {
              "DestinationType": "WEBVTT",
              "WebvttDestinationSettings": {}
            }
          }
        ]
      }
    ],
    "OutputGroupSettings": {
      "Type": "HLS_GROUP_SETTINGS",
      "HlsGroupSettings": {
        "SegmentLength": 10,
        "Destination": "s3://11111/testing/11111",
        "MinSegmentLength": 0
      }
    }
  }
],
"FollowSource": 1,
"Inputs": [
  {
    "VideoSelector": {},
    "TimecodeSource": "ZEROBASED",
    "CaptionSelectors": {
      "Captions Selector 1": {
        "SourceSettings": {
          "SourceType": "TTML",
          "FileSourceSettings": {
            "SourceFile": "s3://111111/Input/111.ttml"
          }
        }
      }
    },
    "FileInput": "s3://1111111/Input/50p.mp4"
  }
]
   },
  "BillingTagsSource": "JOB",
 "AccelerationSettings": {
   "Mode": "DISABLED"
   },
 "StatusUpdateInterval": "SECONDS_60",
  "Priority": 0
   }

Then use it to create template through import template button

Then I can successfully execute job from created template.

The error you're encountering is due to a mismatch between the allowed values for the destinationType field in the job template and the value you're trying to set.

When using a job template in AWS Elemental MediaConvert, certain settings are fixed and cannot be overridden when creating a job from that template. It appears that in this case, the job template you're using has a restricted set of allowed values for the destinationType field, which doesn't include "WEBVTT".

Job templates in MediaConvert are designed to provide consistent settings across multiple jobs, but they also limit flexibility in some areas. The error message suggests that the template you're using only allows the following values for destinationType:

• BURN_IN
• DVB_SUB
• EMBEDDED
• EMBEDDED_PLUS_SCTE20
• SCTE20_PLUS_EMBEDDED
• TELETEXT

To resolve this issue, you have a few options:

1. Modify the job template to include "WEBVTT" as an allowed value for destinationType, if you have the permissions to do so.

2. Create a new job template that includes the WEBVTT option for destinationType.

3. Create the job without using a template, as you mentioned you were able to do successfully.

4. If possible, choose one of the allowed destination types from the template instead of WEBVTT.

Remember that job templates are meant to standardize certain aspects of your transcoding jobs. If you frequently need to use WEBVTT as a destination type, it might be worth creating a new template that includes this option or modifying the existing template if that's feasible in your workflow.
Sources
Creating a job from a template - MediaConvert