product · inferred from evidence
OutputS3KeyPrefix
An optional parameter for StartSpeechSynthesisTask specifying the S3 key prefix for output.
- Polly long text: switch to the async task at 6000 characters
Synthesizing long-form audio with Polly: anything over 6000 characters (3000 billed) fails SynthesizeSpeech with TextLengthExceededException, so switch to StartSpeechSynthesisTask for documents and chapters.