AWS Transcribe InvalidMediaSampleRateHertz error encountered during transcription.

The specified media sample rate is invalid or not supported.

Understanding AWS Transcribe

AWS Transcribe is a powerful tool offered by Amazon Web Services that converts speech into 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 supports a variety of audio formats and languages, making it a versatile choice for developers and engineers.

Recognizing the Symptom

When using AWS Transcribe, you might encounter the error InvalidMediaSampleRateHertz. This error typically occurs when there is an issue with the media sample rate specified in your transcription request. The symptom is usually a failure in the transcription process, accompanied by an error message indicating the invalid sample rate.

Explaining the Issue

The InvalidMediaSampleRateHertz error indicates that the sample rate of the audio file you are trying to transcribe is either not supported or incorrectly specified. AWS Transcribe requires the sample rate to be within a specific range and correctly matched to the audio file's actual sample rate. For more details on supported sample rates, refer to the AWS Transcribe Limits and Guidelines.

Steps to Fix the Issue

1. Verify the Audio File's Sample Rate

First, check the sample rate of your audio file. You can use tools like FFmpeg to inspect the audio file properties. Run the following command to check the sample rate:

ffmpeg -i your-audio-file.wav

Look for the sample rate information in the output.

2. Ensure Compatibility with AWS Transcribe

Make sure the sample rate is one of the supported rates by AWS Transcribe. Common supported rates include 8000 Hz, 16000 Hz, and 44100 Hz. If your audio file's sample rate is not supported, you will need to convert it.

3. Convert the Audio File's Sample Rate

If necessary, use FFmpeg to convert the audio file to a supported sample rate. For example, to convert to 16000 Hz, use the following command:

ffmpeg -i your-audio-file.wav -ar 16000 converted-audio-file.wav

This command will create a new audio file with the correct sample rate.

4. Update Your Transcription Request

Once you have a compatible audio file, update your AWS Transcribe request to reflect the correct sample rate. Ensure that the MediaSampleRateHertz parameter matches the sample rate of your audio file.

Conclusion

By following these steps, you should be able to resolve the InvalidMediaSampleRateHertz error and successfully transcribe your audio files using AWS Transcribe. For further assistance, consider visiting the AWS Transcribe Documentation for more detailed information and support.

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