Include_if_source_has

There are times where you want to conditionally include an output track depending on if a particular input track exists in the source. An example of this would be as follows: separate the outputs into a video file and an audio file, but only create the output audio file if the input has an audio track. The example on the right does this. The "include_if_source_has" is an array of the required input tracks. All tracks start with 0 numbering. Therefore audio[0] is the first audio track, video[0] is the first video track, and subtitles[0] is the first subtitle track. If you would like to verify the existence of a particular channel within an audio track, it would be represented like below (this references the 2nd channel of the 1st audio track):

"include_if_source_has": [ "components::audio_0::audio[1]" ]

---

Example include_if_source_has

{
  "name": "Hybrik Include_if_source_has Example",
  "payload": {
    "elements": [
      {
        "uid": "source_file",
        "kind": "source",
        "payload": {
          "kind": "asset_url",
          "payload": {
            "storage_provider": "s3",
            "url": "s3://my_bucket/my_input_folder/my_file.mp4"
          }
        }
      },
      {
        "uid": "transcode_task",
        "kind": "transcode",
        "payload": {
          "location": {
            "storage_provider": "s3",
            "path": "s3://my_bucket/my_output_folder"
          },
          "targets": [
            {
              "file_pattern": "{source_basename}_video.mp4",
              "existing_files": "replace",
              "container": {
                "kind": "mp4"
              },
              "video": {
                "codec": "h264",
                "bitrate_mode": "vbr",
                "bitrate_kb": 1000,
                "max_bitrate_kb": 1150,
                "height": 720
              }
            },
            {
              "include_if_source_has": [
                "audio[0]"
              ],
              "file_pattern": "{source_basename}_audio.mp4",
              "existing_files": "replace",
              "container": {
                "kind": "mp4"
              },
              "audio": [
                {
                  "channels": 2,
                  "codec": "aac_lc",
                  "sample_rate": 48000,
                  "bitrate_kb": 128
                }
              ]
            }
          ]
        }
      }
    ],
    "connections": [
      {
        "from": [
          {
            "element": "source_file"
          }
        ],
        "to": {
          "success": [
            {
              "element": "transcode_task"
            }
          ]
        }
      }
    ]
  }
}