Converting milliseconds into seconds

Elastic Stack Logstash
1

Hi,
I have captured a field Response time from the log file, but it is in milliseconds, is there a way to convert it in seconds in logstash using any plugin. I tried using mutate but it won't work. Kindly help me out.

2

Something like

ruby {
  code => "event.set('fieldname', event.get('fieldname').to_f / 1000))"
}

should do it (assuming Logstash 2.4 or later).

3

Thanks @magnusbaeck