No duration or confidence info for alignments

[AhmedSalah98]

I've tried generating alignments for a pruned_transducer_stateless7 model using https://github.com/k2-fsa/icefall/blob/master/egs/librispeech/ASR/pruned_transducer_stateless7/compute_ali.py. Looking at the output cuts I can only find the start times for tokens/words. Is there a way to get the duration and confidence info too?

[csukuangfj]

Sorry, we can only get the start time of a token for transducer models.

[AhmedSalah98]

Is it safe to assume that the end time for the token is the start time of the next token? It wouldn't be accurate if there's some silence between words unless the aligner can predict blank tokens. Can this be achieved?
As for the confidences, I've thought about estimating it from log_probs like here #1092