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AWS Transcribe InvalidOutputKey error when using AWS Transcribe.

The specified output key for the transcription result is invalid.

Understanding AWS Transcribe

AWS Transcribe is a powerful tool offered by Amazon Web Services that converts speech to text. It is widely used in applications that require voice recognition and transcription services, such as customer service call centers, media content analysis, and more. AWS Transcribe provides accurate and scalable transcription capabilities, making it a popular choice among developers and engineers.

Identifying the Symptom: InvalidOutputKey Error

When using AWS Transcribe, you might encounter an error message stating InvalidOutputKey. This error typically occurs when there is an issue with the output key specified for storing the transcription result. The symptom of this error is that the transcription job fails to complete, and the output is not stored as expected.

Exploring the Issue: What Causes InvalidOutputKey?

The InvalidOutputKey error is triggered when the output key provided in the transcription job request is not valid. This could be due to incorrect formatting or the presence of invalid characters in the key. The output key is crucial as it determines where the transcription result will be stored in your S3 bucket.

Common Mistakes Leading to InvalidOutputKey

  • Using special characters or spaces in the output key.
  • Exceeding the maximum length allowed for the key.
  • Not adhering to the required format for S3 object keys.

Steps to Resolve the InvalidOutputKey Error

To fix the InvalidOutputKey error, follow these steps:

Step 1: Review the Output Key Format

Ensure that the output key is correctly formatted. It should not contain any special characters or spaces. The key should follow the standard S3 object key naming conventions. For more details, refer to the AWS S3 Object Key Naming Guidelines.

Step 2: Validate the Key Length

Check that the output key does not exceed the maximum length allowed by AWS S3. The total length of the key should be within the limits specified in the AWS S3 Documentation.

Step 3: Update the Transcription Job Request

Modify your transcription job request to use a valid output key. Here is an example of how to specify the output key in your request:

{
"TranscriptionJobName": "example-job",
"LanguageCode": "en-US",
"MediaFormat": "mp3",
"Media": {
"MediaFileUri": "s3://your-bucket/input-file.mp3"
},
"OutputBucketName": "your-output-bucket",
"OutputKey": "valid-output-key"
}

Conclusion

By ensuring that your output key is correctly formatted and adheres to AWS S3 guidelines, you can resolve the InvalidOutputKey error in AWS Transcribe. This will allow your transcription jobs to complete successfully and store the results as expected. For further assistance, consult the AWS Transcribe Documentation.

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