Slow/Fast motion sync'd music videos

D

DDirector

Veteran
I'm wondering if anyone would be able to provide any detailed specs on shooting music videos in slow motion and sped up, with the lyrics still sync'd.

Example:

What frame rate do I shoot -- what speed is the audio -- is this slow motion or fast, and how fast/slow?
24fps -- 1.0x -- normal speed

*Also, if anyone shot music videos like this, whether fast or slow motion, could you provide a link so I can visualize how fast or slow the footage is when they are singing?
Ive never done this before, but REALLY want to do it. And I dont know how fast/slow I really want it. Id like to see some videos and then experiment myself after.

Example footage of slow motion:
http://www.youtube.com/watch?v=JF8BRvqGCNs&feature=youtu.be
@0:26-0:38


I will be able to shoot from 1-120fps
 
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There was a thread here on this very issue last year some time - don't remember whether it was in Cinematography or Special Effects/Stunts though.

But yes, the basic idea is to first create a fake slowed down audio track, play it while singers mime to it and you shoot video, and then you speed up that video footage in post to match the original song speed. Definitely do some experimentation to get the relative speeds right - it may not be as simple as slow down 50% then speed up 200%.
 
The last time I tried this, the band didn't take things seriously and practice with the tracks I provided a month earlier. They ended up getting frustrated and we called off the project.
 
^ sucks

Plus: I've never done this, but I think you need a faster-than-usual soundtrack for them to follow, then you slow down your footage and they become in sync with the actual music
 
Yes, we were basically running audio around 2.5 times speed.

I had broken everything down into scenes with count-ins to make things easier for them, but they were really slackers.
 
I've used this technique a few different times in Premiere. The best thing that has worked for me is doubling the speed of the song and record at 60 frames a second. Then play the clip back at 30fps in Premiere. It works in a 24p timeline as well. Here's an example at 1:23-1:27 in this video I shot:
http://youtu.be/gOxwo8TUQok
 
If
24fps -- 1.0x -- normal speed

Film in -- Music speed -- Speed in post production
30fps -- 1,25x -- 0,8x
50fps -- 2,08333x -- 0,48x
60fps -- 2,5x -- 0,4x

It's simple math... :)
30/24 = 1,25... to convert back take 24/30 = 0,8 :)
 
Digitaldirt said:
If
24fps -- 1.0x -- normal speed

Film in -- Music speed -- Speed in post production
30fps -- 1,25x -- 0,8x
50fps -- 2,08333x -- 0,48x
60fps -- 2,5x -- 0,4x

It's simple math... :)
30/24 = 1,25... to convert back take 24/30 = 0,8 :)
Click to expand...

So is 60fps the fastest you should be going? Speeding the music up above 2.5x, will be a problem to keep up?
Or is it possible to go a bit faster?

What about in reverse when you want to speed up the footage?
What does that work out to?
 
DDirector said:
So is 60fps the fastest you should be going? Speeding the music up above 2.5x, will be a problem to keep up?
Or is it possible to go a bit faster?
Click to expand...

Of course you can shoot at a higher frame rate, if your camera supports it.

But, if you think your subjects are having a hard time keeping up at 60fps, just think what shooting at 120fps would do.
 
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