HD, Tape to film, Baselight.

[juliangiu]

Hello to all.
Well I'm not good in english so I'll try to be specific.
I shoot a movie in Argentina in HDCAM (f900) and then I went to madrid to do DI in a baselight. Then I come back here with a hardisk with dpx files, give it to a people that do Tape to film, and they do a test a it wasn't good, teh film is very washed, with no contrast.
It's possible that they can interprate the files properly?
The people in the post house told that the dpx are Linear, 0-1023, and gamma 0.6.
When I open it in my macbook pro in the apple color i see it's with no contrast.
can anyone tell me what are doing bad?
thanks and sorry for my english.
J.

[juliangiu]

Well, I see that my english is worst that I think.
I downloaded a dpx files from this site, and a I open it in Color, and I saw that it are with out contrast just like the others, and in the wave form it represent similar.
Why?
Can anyone tell anything about it?

[forkazoo]

Are you sure it is linear and not "log"? Maybe you should try telling your software it is log instead of linear and see the difference. Can you post a DPX with the problem so we can look at it?

[juliangiu]

Yes, here is one,
I do it in color, and I see better, but I'm not sure if that is the same that I saw in baselight. Anyway I'm just working in my macbook pro, and the color correction was made with a HD monitor.
I saw new test in film, and it was very best, but I'm not sure what they do.
Did yo see the dpx in the download section? How are it? Log or linear?
Thanks a lot.

[Diogo Girondi]

Seems sRGB to me.

Are you sure Color isn't interpreting it as Log?

How does it look when you open it in Photoshop?

[juliangiu]

When I open it in color, says linear, if I fix the headers and set it in log, but the black and withe are in 0-1023, the image look better. And in the waveform take all the range, not just the middle like when is set in linear.
What is the difference with sRGB, How can I set it?

[Diogo Girondi]

Well without knowing how it should look it gets trickier to guess it's colorspace.

Take a look at the attached file.

[juliangiu]

I think that the 3, so it's log?

[Gentle Fury]

It is a 10-bit log file according to Framecycler.

[C-Workflowers]

0-1023 gamma 0.6 doesn't match to any standard, and if it's linear there is no gamma correction... but usually people use linear to say it's video, and then it's gamma corrected to be seen on 2.2 monitors. That should be pretty easy to convert if you have some charts. Still doing the grading in a place and print it to film in another is kinda dangerous approach since there is nobody in charge of the colour management, so potentially the grading is useless.
One should be careful with the metadata set in the file, since they are not necessarily written correctly by the application.