Amazon transcribe "Operation not found: StartTranscriptionJob" - php

Question

Windows 7 Pro
PHP 7.0.2
AWS transcribe API 2017-10-26
Hi,
I'm trying to use Amazon Web Services to transcribe recordings from an IVR (Please leave your name after the tone. etc) using PHP. I can upload the recordings to my AWS bucket (so something is right) but when I try to start the transcription job I get the following error:
"Operation not found: StartTranscriptionJob"
I can get transcription to work using the AWS CLI so my system seems to be set up OK. There is not a lot online about this issue, I've done all the usual Googling and the info isn't very helpful - such as:
https://docs.aws.amazon.com/transcribe/latest/dg/API_StartTranscriptionJob.html
https://docs.aws.amazon.com/sdk-for-go/api/service/transcribeservice/#TranscribeService.StartTranscriptionJob
Here's my code, the StartTranscriptionJob is at the end:
<?php
require 'aws\aws-autoloader.php';
chdir('asr');
$logFile = 'asr.log';
$log = "\n\n".date("d/m/Y H:i:s");
###################
# get the recording
###################
$service = htmlspecialchars($_GET["service"]);
$recording = htmlspecialchars($_GET["recording"]);
$ftp_server = "ftp.****";
$ftp_username = "****";
$ftp_userpass = "****";
$ftp_conn = ftp_connect($ftp_server,7721) or die("Could not connect to $ftp_server");
ftp_login($ftp_conn, $ftp_username, $ftp_userpass);
ftp_chdir($ftp_conn,'Recordings');
ftp_pasv($ftp_conn, true);
ftp_chdir($ftp_conn,$service);
ftp_get ($ftp_conn , $recording , $recording, FTP_BINARY);
ftp_close($ftp_conn);
######################
# Upload to AWS bucket
######################
use Aws\S3\S3Client;
use Aws\S3\Exception\S3Exception;
$credentials = new Aws\Credentials\Credentials('****', '****');
$bucket = 'asr-bucket-test';
$keyname = $recording;
$s3 = new S3Client([
'profile' => 'default',
'version' => 'latest',
'region' => 'us-west-2',
'credentials' => $credentials
]);
try {
// Upload data.
$result = $s3->putObject([
'Bucket' => $bucket,
'Key' => $keyname,
'SourceFile' => '\xampp\htdocs\****.co.uk\asr\\'.$recording,
'ACL' => 'public-read'
]);
// Print the URL to the object.
$log.= "\n".$result['ObjectURL'] . PHP_EOL;
} catch (S3Exception $e) {
$log.= "\n".$e->getMessage() . PHP_EOL;
}
############
# Transcribe
############
try {
$result = $s3->StartTranscriptionJob([
'LanguageCode' => 'en-US', // REQUIRED
'Media' => [
'MediaFileUri' => 'https://s3-us-west-2.amazonaws.com/asr-bucket-test/'.$recording,
],
'MediaFormat' => 'wav', // REQUIRED
'OutputBucketName' => $bucket,
'Settings' => [
# 'ChannelIdentification' => true || false,
'MaxSpeakerLabels' => 5,
# 'ShowSpeakerLabels' => true || false,
# 'VocabularyName' => $recording
],
'TranscriptionJobName' => 'test_job', // REQUIRED
]);
$log.="\n".$result;
} catch (Exception $e) {
$log.="\nError: Cannot start transcripion job " . $e->getMessage();
}
file_put_contents($logFile, $log,FILE_APPEND);
exit();
?>

Answer 1

You are trying to use S3Client to start the transcription:
$result = $s3->StartTranscriptionJob
Per the error message, S3 doesn't support the StartTranscriptionJob operation. You need to setup and use the TranscribeServiceClient.
You linked to the AWS SDK docs for Go, but your code is PHP. Relevant docs for PHP:
https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-Aws.TranscribeService.TranscribeServiceClient.html

Answer 2

You have to create a new TranscribeServiceClient and then connect through that. Here's a snippet from my working code:
$transcribe = new Aws\TranscribeService\TranscribeServiceClient([
'region' => $region,
'version' => 'latest',
'credentials' => [
'key' => $accessKey,
'secret' => $secretKey,
],
]);
//print_r($transcribe);
$result = $transcribe->startTranscriptionJob([
'LanguageCode' => $languageCode, // REQUIRED
'Media' => [ // REQUIRED
'MediaFileUri' => $mediaURI,
],
'MediaFormat' => $fileExt, // REQUIRED
'OutputBucketName' => $bucketName,
'Settings' => [
'ChannelIdentification' => false,
'MaxSpeakerLabels' => 5,
'ShowSpeakerLabels' => true,
'VocabularyName' => '',
],
'TranscriptionJobName' => $fileName . "-" . date('Ymd-his') // REQUIRED
]);