Varicam to Pal
Posted 20 March 2008 - 09:45 PM
I have a job that we are shooting NTSC Varicam and we need to eventually convert to PAL.
Should I shoot 720 24p?
Or can we shoot @ 25fps?
We've been looking around and can't find the answer.
Posted 21 March 2008 - 04:19 AM
But I've never done it...
Posted 21 March 2008 - 05:43 AM
The obvious answer is to shoot 25p, since it's then just a rescale to achieve PAL. The problem is that if you're shooting in a 60Hz country, you risk a certain degree (it's usually very, very minimal) of flicker with mains discharge lighting. Flicker isn't really the word - it's a 2Hz ripple. I have shot heaps of PAL in the US, including on Times Square at night which must include more or less every technology humanity has for firing off photons, and it's really not a big problem, it's barely visible, but there's probably a shutter speed or synchro-scan option that'll fix it in any case. I should point out that most of the PAL I've shot in the US has been 50i and the characteristic of the flicker may change if you shoot 25p, so test for this first, and obviously talk to post to ensure they're OK with it as handling Varicam footage has a couple of lumps in it whatever you do, but I otherwise have no hesitation in recommending you shoot it at 25.
If you shoot it at 24, you will have to run it fast and resample the sound. This is not difficult - you can practically do it with free tools these days - but it's a suboptimal approach really.
Posted 21 March 2008 - 02:52 PM
Regarding the camera's frequency or other issues, Mitch Gross at AbelCinetech (and here on the boards) may be able to help you.
Posted 23 March 2008 - 02:16 PM
any information would be really appreciated, thanks guys
Posted 23 March 2008 - 02:44 PM
The other, more complicated way to do it is if you're ingesting SDI into an Avid or something like that, which can involve specific bits of hardware.
This is where data recording to P2 scores, because it only records the frames that need to exist, rather than needing to pad it up to 60p all the time.
I'm sorry I can't be more specific on this. Mitch?