inputKey

The name of the file to be used as album art. To determine which Amazon S3 bucket contains the specified file, Elastic Transcoder checks the pipeline specified by PipelineId; the InputBucket object in that pipeline identifies the bucket.

If the file name includes a prefix, for example, cooking/pie.jpg, include the prefix in the key. If the file isn't in the specified bucket, Elastic Transcoder returns an error.