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real value to change comp duration
Hi guys! I’m working in a script to change the duration (and other things) of the or selected comps. The problem is that the value that I get when I use
alert(selectedComps.duration)is very strange for me. In the timeline we can see fps and timecode (0:00:00:00) but the value I get from that alert is “x.yyy”, I can see that x is the amount in seconds of the composition but after “.” they are decimals that I cant figure it out how it works. I soupose is the fps divided by a number I dont know…I’m thinking in a text box to get the first number (seconds), do praseFloat() and get a real number. Also other box to get the frames and apply a math function to it. Do you guys knows any math function I can use?
Thanks!
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7 Replies
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var compLength = selectedComps.duration;
var minutes = Math.floor(compLength / 60);
var seconds = Math.floor(compLength % 60);
var frames = Math.round((compLength - Math.floor(compLength))/selectedComps.frameDuration);
alert (minutes +":"+ seconds +":"+ frames);
I don’t know if it works with multiple selected comps.Andrei
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Nice! Thanks Andrei!
But I need to change the duration of the comp with this values
I want to set the minutes, the seconds and the number of frames with this UI but I dont know how!
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You just reverse the process. Lets say the variables for the texts of this GUI are sec,min,fps,frames.
min*60 + sec + frames/fpsAndrei
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Ok I have this
var compLength = app.project.activeItem.duration;
var minutes =2
var seconds = 15
var frames = 20;minSec = (minutes*60)+seconds;
realFrames = frames /app.project.activeItem.frameDuration;
finalDuration = parseFloat (minSec +"."+realFrames);
app.project.activeItem.duration = finalDuration;
But the comp duration still wrong. It has to be 02:15:20 (it’s a 25 frames comp) but the script result is 02:15:13…
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That is because you used frameDuration instead of fps. Fps is 1/frameDuration, which makes your realFrames value frames*app.project.activeItem.frameDuration. The script would be like this
var compLength = app.project.activeItem.duration;
var minutes =2
var seconds = 15
var frames = 20;minSec = (minutes*60)+seconds;
realFrames = frames *app.project.activeItem.frameDuration;
finalDuration = minSec +realFrames;
app.project.activeItem.duration = finalDuration;
Andrei
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Wow! That help! It worked just fine but when the comp is 23.976 fps it doesnt work… when the minutes value its greater thant 0 the results in frame and in seconds doesnt match… minutes = 1, secondes = 10 and frames = 5 and the result is 0:01:10:03…
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It seems that there is a problem with this framerate. Even if you put an integer as the duration, you get some frames.
Andrei
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