aws-lambda-transcribe module

| Reference Documentation:| https://docs.aws.amazon.com/solutions/latest/constructs/| |:-------------|:-------------|

| Language | Package | |:-------------|-----------------| | Python|aws_solutions_constructs.aws_lambda_transcribe| | Typescript|@aws-solutions-constructs/aws-lambda-transcribe| | Java|software.amazon.awsconstructs.services.lambdatranscribe|

Overview

This AWS Solutions Construct implements an AWS Lambda function connected to Amazon S3 buckets for use with Amazon Transcribe.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { LambdaToTranscribe } from '@aws-solutions-constructs/aws-lambda-transcribe';
import * as lambda from 'aws-cdk-lib/aws-lambda';

new LambdaToTranscribe(this, 'LambdaToTranscribePattern', {
    lambdaFunctionProps: {
        runtime: lambda.Runtime.NODEJS_22_X,
        handler: 'index.handler',
        code: lambda.Code.fromAsset(`lambda`)
    }
});

Python

from aws_solutions_constructs.aws_lambda_transcribe import LambdaToTranscribe
from aws_cdk import (
    aws_lambda as _lambda,
    Stack
)
from constructs import Construct

LambdaToTranscribe(self, 'LambdaToTranscribePattern',
        lambda_function_props=_lambda.FunctionProps(
            code=_lambda.Code.from_asset('lambda'),
            runtime=_lambda.Runtime.PYTHON_3_11,
            handler='index.handler'
        )
        )

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.lambdatranscribe.*;

new LambdaToTranscribe(this, "LambdaToTranscribePattern", new LambdaToTranscribeProps.Builder()
        .lambdaFunctionProps(new FunctionProps.Builder()
                .runtime(Runtime.NODEJS_22_X)
                .code(Code.fromAsset("lambda"))
                .handler("index.handler")
                .build())
        .build());

Pattern Construct Props

| Name | Type | Description | |:-------------|:----------------|-----------------| |existingLambdaObj?|lambda.Function|Existing instance of Lambda Function object, providing both this and lambdaFunctionProps will cause an error.| |lambdaFunctionProps?|lambda.FunctionProps|Optional user provided props to override the default props for the Lambda function.| |existingSourceBucketObj?|s3.IBucket|Existing instance of S3 Bucket object for source audio files.| |sourceBucketProps?|s3.BucketProps|Optional user provided props to override the default props for the source S3 Bucket.| |existingDestinationBucketObj?|s3.IBucket|Existing instance of S3 Bucket object for transcription results.| |destinationBucketProps?|s3.BucketProps|Optional user provided props to override the default props for the destination S3 Bucket.| |useSameBucket?|boolean|Whether to use the same S3 bucket for both source and destination files. Default: false|

Pattern Properties

| Name | Type | Description | |:-------------|:----------------|-----------------| |lambdaFunction|lambda.Function|Returns an instance of the Lambda function created by the pattern.| |sourceBucket?|s3.Bucket|Returns an instance of the source S3 bucket created by the pattern.| |destinationBucket?|s3.Bucket|Returns an instance of the destination S3 bucket created by the pattern.|

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

AWS Lambda Function

• Configure limited privilege access IAM role for Lambda function
• Enable reusing connections with Keep-Alive for NodeJs Lambda function
• Enable X-Ray Tracing
• Set Environment Variables
  • SOURCE_BUCKET_NAME
  • DESTINATION_BUCKET_NAME
  • AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)
• Grant permissions to use Amazon Transcribe service, write to source bucket, and read from destination bucket

Amazon S3 Buckets

• Configure Access logging for both S3 Buckets
• Enable server-side encryption for both S3 Buckets using AWS managed KMS Key
• Enforce encryption of data in transit
• Turn on the versioning for both S3 Buckets
• Don't allow public access for both S3 Buckets
• Retain the S3 Buckets when deleting the CloudFormation stack

Amazon Transcribe Service

• The Transcribe service will have read access to the source bucket and write permissions to the destination bucket
• Lambda function will have permissions to start transcription jobs, get job status, and list transcription jobs

Architecture

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