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# TrainVehicleModel

Trains Media Server to recognize a vehicle model in one action.

Running this action is equivalent to running the following actions in the following order:

- NewVehicleModel
- AddVehicleModelImages
- AddVehicleModelMetadata (optional)
- BuildVehicleModel
- NullVehicleModelImageData (optional)

This action is atomic, so that any interruption to the server does not leave the database in an inconsistent state. If you stop the action using the QueueInfo action, or the action returns an error, the database is not modified. If all of the training images fail, Media Server does not add the vehicle model to the database.

Type: asynchronous

Parameter | Description | Required
--- | --- | ---
`database` | The name of the database to add the vehicle model to. The database must already exist. | Yes
`identifier` | A unique identifier for the vehicle model (maximum 254 bytes). If you do not set this parameter, Media Server generates an identifier automatically. | No
`imagedata` | The training images to add. Files must be uploaded as multipart/form-data. For more information about sending data to Media Server, refer to the Media Server Administration Guide. | Set this or `imagepath`
`imagelabels` | A comma-separated list of labels to identify the images that you are adding (maximum 254 bytes for each label). Every image added to the same vehicle model must have a unique label, so the number of labels must match the number of images provided using either `imagedata` or `imagepath`. If you do not set this parameter, Media Server generates labels automatically. | No
`imagepath` | A comma-separated list of paths to the training images to add. The paths must be absolute, or relative to the Media Server executable file. | Set this or `imagedata`
`metadata` | A comma-separated list of metadata key-value pairs to add to the vehicle model. Separate keys from values using a colon (`:`). To include a comma or colon in a key name or value, you must enclose the key name or value in quotation marks (`"`) and escape any quotation marks that occur within the string with a backslash (`\`). | No
`nullimagedata` | A Boolean value, default `false`, that specifies whether to remove the images from the database after training is complete. Setting this to `true` is equivalent to running the action NullVehicleModelImageData on the vehicle model. Be aware that if you remove the images, the training cannot be updated in future. | No
`numparallel` | The maximum number of threads that the action can use (default 1). | No
`vehiclemake` | The vehicle make to associate with the model. You must specify one of the vehicle makes returned by the action ListVehicleMakes, or `Unknown`. | Yes

## Example

The following example trains Media Server by sending the paths of the training images using the `imagepath` parameter:

    curl http://localhost:14000 -F action=TrainVehicleModel
                                -F database=Cars
                                -F identifier=Mustang
                                -F imagepath=image1.jpg,image2.jpg
                                -F imagelabels=image1,image2
                                -F vehiclemake=Ford

Alternatively, you can train Media Server by sending the image data, for example:

    curl http://localhost:14000 -F action=TrainVehicleModel
                                -F database=Cars
                                -F identifier=Mustang
                                -F imagedata=@image1.jpg,image2.jpg
                                -F imagelabels=image1,image2
                                -F vehiclemake=Ford

## Response

This action is asynchronous, so Media Server always returns success accompanied by a token:

    <autnresponse>
      <action>TRAINVEHICLEMODEL</action>
      <response>SUCCESS</response>
      <responsedata>
        <token>MTAuMi4xMDQuNTQ6MTgwMDA6VFJBSU5PQkpFQ1Q6MTQzMzQwODAwMTU0Mi0xNjAxNDc5NzMx</token>
      </responsedata>
    </autnresponse>

You can use this token with the QueueInfo action to retrieve the status of the action:

    <autnresponse>
      <action>QUEUEINFO</action>
      <response>SUCCESS</response>
      <responsedata>
        <actions>
          <action>
            <status>Finished</status>
            <queued_time>2016-Sep-16 15:14:17</queued_time>
            <time_in_queue>1</time_in_queue>
            <process_start_time>2016-Sep-16 15:14:18</process_start_time>
            <time_processing>1</time_processing>
            <process_end_time>2016-Sep-16 15:14:19</process_end_time>
            <build>
              <image>
                <index>1</index>
                <label>image1</label>
                <status>trained</status>
              </image>
              <image>
                <index>2</index>
                <label>image2</label>
                <status>trained</status>
              </image>
            </build>
            <database>Cars</database>
            <identifier>Mustang</identifier>
            <numimages>2</numimages>
            <numtrained>2</numtrained>
            <token>MTAuMi4xMDQuNTQ6MTgwMDA6VFJBSU5PQkpFQ1Q6MTQzMzQwODAwMTU0Mi0xNjAxNDc5NzMx</token>
          </action>
        </actions>
      </responsedata>
    </autnresponse>

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