Parsing log for time durations and treat it as time?

[McFLY]

Hello.
I'm quite new to zabbix and I've got myself to dead end =(

Can some one tell me how can I parse time (or uptime) from a log in H:MM:SS.mmm format and then treat it as float to calculate avg, min and max?

For example:
I have a log item wich stores those timings, parsed from log, in H:MM:SS.mmm format as strings (0:03:42.056 for example)
logrt[/path/to/log,@ssessions,,,,\1]
where @ssessions is "session time: (.:..:..\....)"

How to treat that data as numbers? avg() function in 'Calculated' item can't evaluate that.
I even tried to make "00342.056" from example above and it still can't evaluate that.

/Thanks for any help

[steveboyson]

I would suggest to use a custom script to parse these values and do the calculations there.

[McFLY]

I would suggest to use a custom script to parse these values and do the calculations there.

Yes, I thought about it too, but zabbix has clever mechanics of reading only new info from logs without any custom things, so it would be a shame to not using it =\