Nick Shaw wrote: I am not an advocate of interlacing by any means, but being pedantic I disagree with your statement that "50i is essentially 25 frames per second in two halves". 50 fields per second still has 50 separate "samples in time" per second, so is closer in appearance to the viewer to 50p than 25p (albeit with lower vertical resolution.) This is if it is shown properly at 50Hz. If the TV has a cheap de-interlacer one field will be dropped, and it will look like bad 25p.
Nick Shaw wrote:I agree you will have a cinematic image, but this is not what the OP was asking about. If you "interlace in post to 50i" you will get 25psf, not 50i. That is unless you are using optical flow interpolation to create different temporal samples, for the second field. But if you are having to go to the trouble of doing that, then yes you really are using the wrong camera!
If you are getting "tearing and issues introduced by interlacing" then you are using a workflow which does not handle interlacing correctly.
But to repeat, I don't like interlacing either (or 48, 50 or 60p for that matter) but I'm just trying to be technically accurate.
Yes, I was dumbing down the the facts a little bit to make my point...Hence "essentially" I know what you're saying, you're correct, but my point was those 50i frames are not 50 unique frames as with progressive, they're just 25 pairs, yes they sample time independently - that can exaggerate rolling shutter issues under some circumstances such as a whip pan (which was what I was referring to by tearing).
You couldn't take your 50i and convert it to 50p, but you could convert your 50i to 25p.
max258 wrote:Ok, when not 50i, then not.
But I change my question, 50p for Europe.
I think this is really clear question.
Do you think so?
If you're asking for 50p, sure - we'd all like higher frame rates, but you probably won't get it in this version of the BMCC because of the hardware issues surrounding it. There are already ten's of threads about this.
There are plenty of great cameras out there for exactly the kind of application you're talking about. I used to own the Panasonic AF101 which shot all those frame rates you mentioned. With the AF101A - which shoots 10bit colour, and a Hyperdeck/Atomos you could have 10bit Prores at any frame rate you please between 12-60 fps.
Granted, it is a little more expensive - but if you're shooting for broadcast you'll have the money and it is an investment, and the cost will work out the same as the BMCC after you've rigged it. I would urge you to look at those options properly because you seem to be coming from a TV frame of mind, and the Black Magic Cinema Camera is simply not designed or marketed at TV shooters.