Frame rate from audio 24fps to audio 23,976

Audacity Help Forum Windows
1

Hello,

This is a really basic question. But after searching on google and testing for hours… I dont find the correct answer, I ask this here. I know it’s not an “audacity” question but well. If anybody can help…

I need to put the audio from a video that is 24fps to the video with the same content that is 23,976fps.
It has of course to be synchro.

So, basicaly I have to convert a 24fps audio to a 23,976 audio.

Every attempt is a failure. On goodle, it says it should be this on the properties: 24000/1001. But that doesn’t match at all.
I tried 24000/999, same. I also tried many other values to test, nothing seems to be the correct value… It gives me a headache.

Any help?

2

So, that’s (24 - 23.976)/24 = 0.001. That’s 1 second every 1000 seconds (~17 minutes). Is that about what you’re seeing?

And you want to go to 23.976 from 24, so you want to go slower, right?

Try the Speed Change effect with a Speed Multiplier of 0.999.


On goodle, it says it should be this on the properties: 24000/1001.

Depending on the software/effect “100%” sometimes means be 100% faster than the original (twice as fast) or 100% of the original (no change).

3

You’re using Effect > Change Speed, right? Not either of the other two.

1.001. That is totally the correct number, you just did it wrong.

30 / 1.001 = 29.97002997002997 NTSC Frame Rate

24 / 1.001 = 23.976023976023976 3:2 pulldown for US video projection of 24-frame film.

Are you sure of your originals? Our company made equipment that would shoot theatrical film at 23.976.

Try the Speed Change effect with a Speed Multiplier of 0.999.

What he said.

Koz

4

Sometimes you can get increase accuracy in these effects by specifying the old and new target selection lengths.

5

Thank you very much.
1.001 was the right setting for my need here! It worked finally!

What I like about this forum is that you are very reactive and helpful!

Great help, thans again!

6

Mi does not want to synchronize

7

Mi does not want to synchronize

So as up this thread, either your original master or your off-speed tracks are wrong. There are very few options.

Third time:
What happens when you use the Beginning and End time settings in Effect > Change Speed instead of trying to manage the arithmetic by hand?

Koz