HVX200/Lipsync slowmo for musicvideo/Detailed framerate settings

H

hkarlsen

Member
Hi there, and thanks for a great place for information on all things hvx200/ex1

Im shooting a mvid with ps mini35 and zeiss lenses next tuesday. Were thinking doing some slowmo lipsync, and I started reading up on HVX200 and the 720PN mode.

Is it true that 32 fps, is in reality 32.325 fps (or something like that), thus creating a complete chaos in the sync? If so, were can I get the TRUE framespeed?

And, when that is settled, what is the correct way for figuring out speed changes. I thought that if I shot at 32 fps, I should speed the song up 28%, since the increase from 25 to 32 is 28%. I read somewere at the DVX part of this forum that the correct math would be 100/.72 = 138.888889, that means a hefty 38.8% increase. (100-28=78)

What is the correct math?

Thanks for any help!

Regards
Håvar
 
i too have been searching for these proper calculations, anyone care to chime in here?
 
I don't know if you are PAL user but,in Pal these calculations are a little easier.I found a task which is written from Barry,but of course i just copied the pal version.There must be the same forum around here.

For the PAL/EU/AUS/NZ cam, set the recording mode to 720/25pN, then set your frame rate to whichever your chosen fps is.
Then adjust the speed of the song according to this table:

12 fps: make song last 2.000x as long as normal; play it at 50.00% speed
18 fps: make song last 1.400x as long as normal; play it at 71.44% speed
20 fps: make song last 1.266x as long as normal; play it at 78.96% speed
23 fps: make song last 1.080x as long as normal; play it at 92.60% speed
27 fps: make song last 0.920x as long as normal; play it at 108.68% speed
30 fps: make song last 0.840x as long as normal; play it at 119.04% speed
32 fps: make song last 0.778x as long as normal; play it at 128.56% speed
37 fps: make song last 0.680x as long as normal; play it at 147.04% speed
48 fps: make song last 0.520x as long as normal; play it at 192.32% speed
50 fps: make song last 0.500x as long as normal; play it at 200.00% speed
 
Lumiere said:
I don't know if you are PAL user but,in Pal these calculations are a little easier.I found a task which is written from Barry,but of course i just copied the pal version.There must be the same forum around here.

For the PAL/EU/AUS/NZ cam, set the recording mode to 720/25pN, then set your frame rate to whichever your chosen fps is.
Then adjust the speed of the song according to this table:

12 fps: make song last 2.000x as long as normal; play it at 50.00% speed
18 fps: make song last 1.400x as long as normal; play it at 71.44% speed
20 fps: make song last 1.266x as long as normal; play it at 78.96% speed
23 fps: make song last 1.080x as long as normal; play it at 92.60% speed
27 fps: make song last 0.920x as long as normal; play it at 108.68% speed
30 fps: make song last 0.840x as long as normal; play it at 119.04% speed
32 fps: make song last 0.778x as long as normal; play it at 128.56% speed
37 fps: make song last 0.680x as long as normal; play it at 147.04% speed
48 fps: make song last 0.520x as long as normal; play it at 192.32% speed
50 fps: make song last 0.500x as long as normal; play it at 200.00% speed
Click to expand...

Thanks alot for this, I tested it and it synced perfectly. Were going for 32 fps, this is a quite normal speed for this, right?

I actually did search for answers for this, but never found that thread you refer to above. But thanks anyway!
 
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