AE时间数字特效教学

rate = 1;

clockStart = 0;

function padZero(n){

if (n < 10) return "0" +n else return "" + n

}

clockTime = Math.max(clockStart + rate*(time - inPoint), 0);

t = Math.floor(clockTime);

min = Math.floor((t%3600)/60);

sec = Math.floor(t%60);

min + ":" + padZero(sec)