Interlaced?

O

OTTOEMEZZO

Active member
A couple of questions
1. What are the best uses for the different frame rates: 24, 30, and 60i. Why is 60i is listed as interlaced? Aren't all of them interlaced, because the camera shoots 1080i???
2. How to deinterlace footage in post? Do I have to do it with just 60i or all of them?
 
1080/24F and 1080/30F are stored as progressive footage, not interlaced. Only 1080/60i is stored as interlaced.

Never de-interlace, that just ends up de-stroying your footage. Unless you shot 1080/60i and you want to simulate 30P, but you'd be better off to shoot 30F in the first place. De-interlacing went out of style in 2002 when the DVX100 came out. Progressive footage should *never* be de-interlaced.
 
So why is Canon XH A1 1080i, whereas HVX200 is 1080p? Both shoot progressive 24 and 30 fps and also both the have the option of 60i. What's the difference?
 
Canon uses interlaced chips, HVX uses progressive. Even so, it makes little difference; the Canon 1080/24F is just as sharp as the HVX's 1080/24p.
 
ESTEBEVERDE said:
Right.

But what are the best "secret ingredients" to convert 1080/60i to progressive?
Click to expand...
Well, the best secret is to not shoot 1080/60i in the first place. Now that you have cams from every major manufacturer that offer 1080/24p (excepting JVC, of course) why shoot 60i?

But if you're stuck with a Z1 or FX1 and don't have 24p, and you want to turn 60i into 24p, you can try the Nattress filter or DVFilm's Maker software.
 
What about slow mo? I heard that to get perfect slow mo you got to shoot in 60i and then convert to 24 fps at 40%. Is that right?
 
For a DVX, yes, that's one technique. You have to be careful to use the right style of de-interlacing (you want "interpolate", not "blend") and you have to accept that your footage will be noticeably lower in res.

The other way to go is to shoot 30p and play it back at 80%. That looks gorgeous, but it's not a very noticeably slow mo effect, it's pretty mild.
 
How about shooting at a higher shutter speed (say 1/250, 1/500), would the slow motion look good then? If not, what would you say is the optimal way to slow down the footage to about 40 or 50 percent?
 
Using a higher than necessary shutter speed will make your motion look choppy. If you're trying to emulate the film-style shutter look, you'd use 1/60th for 30p and 1/120th for 60i.
 
You must log in or register to reply here.
Back
Top