AWS Transcribe Streaming Example Java Application

Example Java Application using AWS SDK creating streaming transcriptions via AWS Transcribe

License Summary

This sample code is made available under a modified MIT license. See the LICENSE file.

Setup

This application builds with Java 8 using JavaFX. It may not build using OpenJDK 11 due to JavaFX being moved to its own library.

This application assumes your credentials are defined in the same way the Default Credential Provider Chain requires.

There is a new permission required to use streaming transcription, StartStreamTranscription. You can use a policy like this:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "transcribestreaming",
            "Effect": "Allow",
            "Action": "transcribe:StartStreamTranscription",
            "Resource": "*"
        }
    ]
}

To generate an executable jar, use the following commands:

export AWS_ACCESS_KEY_ID=<your access key>
export AWS_SECRET_ACCESS_KEY=<your secret key>
export AWS_REGION=us-west-2
mvn clean package
java -jar target/aws-transcribe-sample-application-1.0-SNAPSHOT-jar-with-dependencies.jar

Description

This application demonstrates how to use AWS Transcribe's streaming API by wrapping it in a graphical user-interface. The code with the call to the Transcribe API is located in TranscribeStreamingClientWrapper.java, in the "startTranscription" method.

This API takes advantage of a more advanced AWS SDK feature: the EventStream. These allow for streaming APIs by defining behaviors to execute for multiple types of events, including success and error events. You can see an example implementation of this behavior defined in the WindowController.java class, in the "getResponseHandlerForWindow" method. These events are handled asynchronously, but you can see an example of treating the streaming API as a synchronous service in the TranscribeStreamingSynchronousClient.java class, which is used for reading files in the UI.

Classes

See Also

https://docs.aws.amazon.com/transcribe/latest/dg/streaming.html