StepFunction ProcessTranscription step failed - list index out of range

I am trying to test this solution and after that I have uploaded an audio file, the Step functions tasks initialized successfully, the audio is transcribed but it fails in the task ProcessTranscription. It gives the following error:
{
"errorMessage": "list index out of range",
"errorType": "IndexError",
"requestId": "20e40cc7-a3c4-4ca7-a707-17e4744fa3dd",
"stackTrace": [
" File \"/var/task/pca-aws-sf-process-turn-by-turn.py\", line 1191, in lambda_handler\n transcribeParser.parse_transcribe_file(sf_data)\n",
" File \"/var/task/pca-aws-sf-process-turn-by-turn.py\", line 1153, in parse_transcribe_file\n self.speechSegmentList = self.create_turn_by_turn_segments(sf_event)\n",
" File \"/var/task/pca-aws-sf-process-turn-by-turn.py\", line 779, in create_turn_by_turn_segments\n last_word = nextSpeechSegment.segmentConfidence[-1]\n"
]
}

It seems to be something related to nextSpeechSegment.segmentConfidence in pca-aws-sf-process-turn-by-turn.py. I am trying to use it for Portuguese-Brazil language.


Start in pca-aws-sf-process-turn-by-turn.py, especially create_turn_by_turn_segments around line 779 and the parse_transcribe_file call shown in the stack trace. Reproduce the ProcessTranscription step with a Portuguese-Brazil transcription and inspect why segmentConfidence is empty; done means the step completes without IndexError for that input.

Written by the indexing model from the issue text.