Working on 2k dpx,16mm few questions..

[flameopV2]

Working on some shots at 2k that are going back to film

. Scanned as 10bitdpx and imported as 2k 16bit LOG files. Kind of confused on the whole Log>lin>Log process..

Keylight has an option to key in LOG but the quality I’m getting is pretty poor. If you add a log>lin before are you best leaving the values alone? The shot looks hugely dark and really grainy. To be honest the keys just as bad then. Was shot on 16mm. Never had this problem on video (digi-b or telecined 16/35 or HD). Should I be grading the shots before I feed into the keyer?

What are the basic pipelines to use? I mean surely log>lin comp >lin/log is going to loose information yes? just want to work out if I’m doing it wrong or the shots actually badly shot.

any hints or suggestions would be great.

tia

si

[Fusion CIStudios]

If you are going back to film make sure to set the bit depth of your clip to float. Then apply the log>lin. This will help preserve your highlights. If you work at 16bit you will lose highlights when you go lin>log for your record out. So work in 32bit. Make sure to convert your bit depth before you convert to linear space.

[bnw]

What iraflowers said (although if you’re on Flame it’s too bad, you will have to work in 12 bit), plus, if you’re comping in linear you’ll need some kind of viewer lookup so you can see what you’re doing, or everything will look really really dark 🙂

If you’re on Flame, dive into the monitor settings, you could use just a gamma lookup of about 2.5 or you could tinker with FilmVis, which is a little harder to get going but would get you a lot closer to what it’ll really look like.

[pixelmonk]

I would advise converting to linear first, your keying will be much better for starters. You will then need to use a monitor LUT, (we use an inhouse one) to approximate what the shot will look like on film, but I also check my work at a amonitor gamma of 1, to check the highlights and a gamma of 2.2, to check the blacks. You should avoid grading the shot as much as possible as what you are aiming for is for your shot to drop back into the original neg.

Paul

[Victor Danell]

Thanks guys.. much appreciated.

found this blog pretty useful aswell..

http://prolost.blogspot.com/

cheers

Si

[Fusion CIStudios]

Since you’re working in Flame you can simply turn on a 3DLUT to the appropriate gama level. This should preserve your image sequence.

[Victor Danell]

Cheers ira I’ll give it a go 🙂

si

[Author]

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