count music time and return a time value

[qevhytpl 18]

hi everyone：I want game count music playing time and return a value by script .

like this:

_pla = _this select 0; 
_sht = _this select 1;
_tw  = _this select 2;
_time = sizeOf "_sht";//of crouse this isn't useful. I just place a case.
_pla playmove"AmovPercMstpSrasWrflDnon_SaluteIn";
sleep 2;
_pla say format ["%1", _sht];
_pla sidechat format ["%1:%2",name _pla,_tw];
sleep _time;// this is my problem 
_pla switchmove "ActsPercMstpSnonWrflDnon_interrogate02_forgoten";

//becase I will deal with thousands of tracks , so I want a more effective script .

do you understand me?

Edited July 31, 2012 by [FRL]Myke

[[frl]myke 14]

Belongs to the editing section...fasten your seat belts, thread is moving.

:EDITH:

Also added code tags to your script snippet.

[qevhytpl 18]

thx very much