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View Full Version : Converting R3D to DPX different gammacurve options and latitude



bolex
06-13-2008, 01:25 AM
Hello.

I'm trying to incorporate red generated material to existing 2k pipeline. The most sensible solution would seem to be pulling the frames used in the final edit as 2k dpx files from the R3D originals with redline.

I'm a bit puzzled by the different gamma options. I'd like to have one low contrast setting to use at all the material in order to avoid having to do shot by shot colour correction adjustments before the actual CC.

Using something like REDlog would seem quite ideal. What I find quite strange though is that the different logarithmic gamma options don't seem to give you any more latitude than the REC709 option. It looks to me that the REC709 conversion with the default settings already has the whole dynamic range of the captured image and using other gammas or changing exposure settings doesn't really give you much more detail in either end of the spectrum.

I have quite limited set of test material though, so I might be jumping in to conclusions too fast. What could be the benefits of using PD685 or REDLog over REC709 as it seems like the whole dynamic range of the camera already gets compressed into REC709?

Thanks in advance for all the ideas and suggestions.

Cüneyt Kaya
06-13-2008, 03:15 AM
read this here
http://www.reduser.net/forum/showthread.php?t=13443

bolex
06-13-2008, 04:05 AM
Thanks for pointing me into that. I didn't take into consideration the 12-bitness of the original material. I too find the way PD685 is handled a bit misleading, but let's not get stuck with that anymore.

So the most sensible choices would be 16-bit tiff rec709 (too slow/large perhaps) or 10-bit redlog dpx (custom LUTting to do). I need to see how to move forward with this.

Thanks again!