In some cases, you might want to apply a transform to only a specific portion of the source asset. MK.IO enables this by allowing you to set time for the input in the job configuration.

Setting a time range to a job input is not exposed in the UI and must be configured using the job endpoint in MK.IO API.

MK.IO jobs support two types of input: #Microsoft.Media.JobInputAsset and #Microsoft.Media.JobInputHttp. Both input types can be clipped prior to applying the transform.

The start and end parameters can be either relative to the content using #Microsoft.Media.AbsoluteClipTime or based on UTC time using #Microsoft.Media.UtcClipTime. For VOD content, UTC time is applicable, in this case absolute clip time should be used instead.

Use Absolute time to transcode a portion of an asset

Below is a sample job that generates a new asset containing only the first 3 minutes of an input asset.

curl --request PUT \
     --url https://api.io.mediakind.com/api/ams/project_name/transforms/transform_name/jobs/job_name \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --header 'Authorization: Bearer bearer-token' \
     --data '
{
    "properties": {
        "input": {
            "files": [
                "my_asset.mp4"
            ],
            "assetName": "myasset",
            "@odata.type": "#Microsoft.Media.JobInputAsset",
            "start":
            {
                "@odata.type":"#Microsoft.Media.AbsoluteClipTime",
                "time":"PT0S"
            },
            "end":
            {
                "@odata.type":"#Microsoft.Media.AbsoluteClipTime",
                "time":"PT3M"
            }            
        },
        "outputs": [
            {
                "assetName": "clipped-asset",
                "@odata.type": "#Microsoft.Media.JobOutputAsset"
            }
        ]
    }
}
'

Use UTC time to clip a live event

Below is a sample job that can be applied to a live event asset to extract a specific time range between two UTC values:

curl --request PUT \
     --url https://api.io.mediakind.com/api/ams/project_name/transforms/transform_name/jobs/job_name \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --header 'Authorization: Bearer bearer-token' \
     --data '
{
    "properties": {
        "input": {
            "files": [
                ""
            ],
            "assetName": "live-event-output",
            "@odata.type": "#Microsoft.Media.JobInputAsset",
            "start":
            {
                "@odata.type":"#Microsoft.Media.UtcClipTime",
                "time":"2024-07-26T08:30:00.000Z"
            },
            "end":
            {
                "@odata.type":"#Microsoft.Media.UtcClipTime",
                "time":"2024-07-26T08:40:00.000Z"
            }            
        },
        "outputs": [
            {
                "assetName": "clipped-asset",
                "@odata.type": "#Microsoft.Media.JobOutputAsset"

            }
        ]
    }
}
'