Subclip a video when encoding with Media Services - REST

You can trim or subclip a video when encoding it using a Job. This functionality works with any Transform that is built using either the BuiltInStandardEncoderPreset presets, or the StandardEncoderPreset presets.

The REST example in this topic creates a job that trims a video as it submits an encoding job.


It is not advised to attempt to wrap the REST API for Media Services directly into your own library code, as doing so properly for production purposes would require you to implement the full Azure Resource Management retry logic and understand how to manage long running operations in Azure Resource Management APIs. This is handled by the client SDKs for various language - .NET, Java, Typescript, Python, Ruby, etc. - for you automatically and reduces the chances of you having issues with rety logic or failed API calls. The client SDKs all handle this for you already. The Postman collection is provided more as a teaching tool, and to show you what the client SDKs are actually doing on the wire during your development with the various client SDKs.


To complete the steps described in this topic, you have to:

Create a subclipping job

  1. In the Postman collection that you downloaded, select Transforms and jobs -> Create Job with Sub Clipping.

    The PUT request looks like this:{{api-version}}
  2. Update the value of "transformName" environment variable with your transform name.

  3. Select the Body tab and update the "myOutputAsset" with your output Asset name.

      "properties": {
        "description": "A Job with transform cb9599fb-03b3-40eb-a2ff-7ea909f53735 and single clip.",
        "input": {
          "@odata.type": "#Microsoft.Media.JobInputHttp",
          "baseUri": "",
          "files": [
          "start": {
            "@odata.type": "#Microsoft.Media.AbsoluteClipTime",
            "time": "PT10S"
          "end": {
            "@odata.type": "#Microsoft.Media.AbsoluteClipTime",
            "time": "PT40S"
        "outputs": [
            "@odata.type": "#Microsoft.Media.JobOutputAsset",
            "assetName": "myOutputAsset"
        "priority": "Normal"
  4. Press Send.

    You see the Response with the info about the job that was created and submitted and the job's status.

Next steps

How to encode with a custom transform