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MIDI beats instead of time or frames?

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VJ Franz Keller
MIDI beats instead of time or frames?
on Jan 16, 2010 at 3:54:15 pm

Is there any easy way to deal with MIDI tempo in AFX?

even if just a script that automatically placed keyframes or something with the right timing

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Tim Andrews
Re: MIDI beats instead of time or frames?
on Jan 19, 2010 at 8:42:33 pm

If you know the Tempo and it does not change; then it is simple maths to convert Beats and Bars to Frames. And someone may know a neat way to import such data into AE.

However, inaccuracies will occur because (AFAIK) KeyFrames are applied to the start of a Frame, which won't necessarily occur exactly on a Beat. And it gets very hard if there are changes in the Tempo.

You may find that only having the Beats is inadequate. Rather more fun is to have all the Notes, Channels, Velocities and durations.

Although not designed for AE, the Windows program "MIDIANAL" may be of some little help. And an updated version might be available, on request, from the Author.

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VJ Franz Keller
Re: MIDI beats instead of time or frames?
on Jan 20, 2010 at 2:07:38 am

Thanks for your thoughts!

I guess I will make a wish request on
for a "bpm synch layer", I'm SURE a lot of people would like that.
doesn't sony vegas (which evolved from Acid, a music prog)
include such things?
(even if it does in rendering get rounded to the nearest frame,
which yes, sometimes is half-way through a beat!
but viewers are unlikely to notice.)

I guess doing everything at 60 FPS, or some other frame rate,
and then re-mapping it back to 30 (yeah 29.97 whatever)
might also help.

as you can probably guess, I'm making music videos for myself / others
(in which I often often DO have richer data sets available)

on youtube as VJFranzK

and also getting into more video remixing aka "mash ups"
(where I DONT have anything but the clips and approximate tempo.)

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