The Forced Alignment API provides improved accuracy for per-word timestamps for a transcript.
The base URL for this version of the API is
https://api.rev.ai/alignment/v1/. All endpoints described in this documentation are relative to this base URL.
Clients must authenticate by including their Rev AI access token as a query parameter in their requests. If the access token is invalid or the query parameter is not present, a
401 error code will be returned.
Turnaround time increases with the length of the input audio file.
The maximum possible turnaround time for a job is 3 hours. Jobs which exceed this time limit will be automatically marked as failed.
The following table illustrates average turnaround times for different audio lengths:
|Audio length||Average turnaround time (seconds)|
|1 minute||9.8 seconds|
|2 minutes||13.7 seconds|
|5 minutes||24.6 seconds|
|10 minutes||35 seconds|
|30 minutes||100 seconds|
|60 minutes||450 seconds|
|2 hours||670 seconds|