You can use standard Javascript if you need to do something more complex, so for this problem I just searched in Google for javascript convert seconds into minutes and it came back with https://stackoverflow.com/questions/3733227/javascript-seconds-to-minutes-and-seconds that I used for this answer
From the Edit Filename Mask screen create a Javascript User Defined Function using the Add button that your mask can then use in your mask
function formatDuration(duration)
{
// Hours, minutes and seconds
var hrs = ~~(duration / 3600);
var mins = ~~((duration % 3600) / 60);
var secs = ~~duration % 60;
// Output like "1:01" or "4:03:59" or "123:03:59"
var ret = "";
if (hrs > 0) {
ret += "" + hrs + ":" + (mins < 10 ? "0" : "");
}
ret += "" + mins + ":" + (secs < 10 ? "0" : "");
ret += "" + secs;
return ret;
}
Can then be used in your mask like
+ formatDuration(duration)
e.g
BTW 6.9.5 is very old version, you are missing out on alot of improvements and fixes, update to 8.0 costs only £10 and would give all updates for the next year.