Question

AE弄了个模板，发现正计时和倒计时不统一，请高手看下，是表达式问题吗？

正计时：
h=0;m=0;s=0;f=0;
f+=timeToFrames();
s+=Math.floor(f*comp("Music Visualizator 05").frameDuration);
m+=Math.floor(s/60);
h+=Math.floor(m/60);
f=Math.round(f%(1/comp("Music Visualizator 05").frameDuration));
s=s%60;
m=m%60;
if(f<10) {f="0"+f}
if(s<10) {s="0"+s}
if(m<10) {m="0"+m}
if(h<10) {h="0"+h}
m+":"+s

倒计时：
framebase = 1.0/comp("Music Visualizator 05").frameDuration;
totalDuration = Math.round(comp("Music Visualizator 05").duration)*framebase;

frameAtTime = timeToFrames(t = time + comp("Music Visualizator 05").displayStartTime, fps = 1.0 / comp("Music Visualizator 05").frameDuration, isDuration = false);
countdownerFrame = totalDuration - frameAtTime;

seconds = Math.round(countdownerFrame / framebase)%60;
seconds < 10 ? secondsString = "0" + seconds : secondsString = "" + seconds;

minutes = Math.round(((countdownerFrame / framebase)/60-0.5)%60);
minutes < 10 ? minutesString = "0" + minutes : minutesString = "" + minutes;

timecodeDisplay = minutesString + ":" + secondsString;

Answer 1

我试了一下，倒计时“秒”比正计时快了0.5s，在每秒的0.5s处倒计时就动了，这个问题不难看出来，并且这么计时肯定是有错误的，问题很好改，正计时没问题，倒计时问题出在了这句：seconds = Math.round(countdownerFrame / framebase)%60；你只要将：
Math.round(countdownerFrame / framebase)%60的Math.round改为Math.ceil就好，不让它四舍五入，让它向上取值就好了。为了确保安全，你最好也把下面的minutes = Math.round(((countdownerFrame / framebase)/60-0.5)%60);
也改成ceil。
把下面我改好的复制粘上去行了。

倒计时：
framebase = 1.0/comp("Music Visualizator 05").frameDuration;
totalDuration = Math.round(comp("Music Visualizator 05").duration)*framebase;

frameAtTime = timeToFrames(t = time + comp("Music Visualizator 05").displayStartTime, fps = 1.0 / comp("Music Visualizator 05").frameDuration, isDuration = false);
countdownerFrame = totalDuration - frameAtTime;

seconds = Math.ceil(countdownerFrame / framebase)%60;
seconds < 10 ? secondsString = "0" + seconds : secondsString = "" + seconds;

minutes = Math.ceil(((countdownerFrame / framebase)/60-0.5)%60);
minutes < 10 ? minutesString = "0" + minutes : minutesString = "" + minutes;

timecodeDisplay = minutesString + ":" + secondsString;