GH1 - Frame Rate Conversion Tests - 720 60p & 30p to 24p vs. HPX 170 1080 24p

[Barry_Green]

1/60 for "live" footage. 1/120 for if you intend to use the footage for slow-mo.

[one dog]

I've been over on the GH1 group on Vimeo for a while, and it seems like everyone is saying for 'live' footage you have to double the frame rate, ie. 60fps = 1/120 shutter speed (though it looks like 1/120th isn't even an option?). I'm not much of a techie, so I can't say why, and I could equally be misinterpreting what I'm reading.

So if I shoot my 720p 60fps at 1/60, I'll be good (and also give myself an easier conversion to 24p?)

thanks!

[Barry_Green]

I can't believe how misunderstood the shutter speed is. It's amazing the kind of things people out there say.

Here's the absolute real deal: if you want the "live look", you shoot 720/60p at 1/60th, and that's it. Done. Forget about 1/120.

If you want to shoot 60fps for use as slow motion in a 24p or 30p project, THAT is when you'd use 1/120.

And if for some reason you want to convert 720/60p to 24p, you'll be much much much better off with 1/60th instead of 1/120th.

[one dog]

Awesome... thanks!

[kmoreau893]

I like to shoot 30P (29.97FPS to be more exact). Does anybody have experience in converting the GH1 1080i in AVCHD mode to 30 P, shutter speed, etc? Thanks much for any advice.

[Barry_Green]

The GH1 doesn't have 1080i. It has 1080/24p embedded within 60i. No way to get 30p from that.

if you want 30p, best to just use the MJPG mode, which is 720/30p.

[sebek]

I can't believe how misunderstood the shutter speed is. It's amazing the kind of things people out there say.

Here's the absolute real deal: if you want the "live look", you shoot 720/60p at 1/60th, and that's it. Done. Forget about 1/120.

If you want to shoot 60fps for use as slow motion in a 24p or 30p project, THAT is when you'd use 1/120.

And if for some reason you want to convert 720/60p to 24p, you'll be much much much better off with 1/60th instead of 1/120th.

Is this really true?? I was told as a beginner when shooting (regular not going for slow motion) at 720/60p to shoot at 120 shutter and at 1080/24p at 60 shutter speed. Now I'm really confused

[sebek]

I think I found the answers: 720/60p - 1/60 shutter, 1080/24p - 1/60 or 1/40 or 1/30 correct?