Hey Gary, Amira LogC is the same isn't it? It's possible Premiere is applying a LogC to Rec709 LUT to roll the highlights off and get it looking presentable. I would imagine from what you're saying that the footage looks blown out in Nuke because it's not doing the additional s-curve in the above LUT to get a reasonable image. Check out the Arri web site to download a LogC to Rec709 LUT.
Cheers, Michael On 28 October 2016 at 13:02, Gary Jaeger <g...@corestudio.com> wrote: > I have a question about LogC as well. Do we need a different LUT to work > with Amira LogC footage? I’m pretty sure the camera tags the clips, and for > instance Premiere reads that and displays the footage with that lut so the > editor (and client) see something reasonable i.e. not flat LogC like it is > looking at the raw clips. But Nuke displays the footage quite blown out. I > know the data is there, but is the AlexaV3LogC not the right transform? > > > *Gary Jaeger */ 650.728.7957 direct / 415.518.1419 mobile > http://corestudio.com > > On Oct 26, 2016, at 7:07 AM, Stepan Z <motionarti...@gmail.com> wrote: > > Hello i didn't think about the bitrate! Thank you Andrew! I'll read about > the compare node! > > All the best > > Stepan > > > > > On 25 Oct 2016, at 22:19, Andrew Mumford <a_mumf...@mac.com> wrote: > > Are your dpx's 10 bit ? - That would make it different for sure ! > > There's also a "hidden" but wonderful node called"Compare" that is great > for checking these things - gives you a visual and error based output. > > --- > Andrew Mumford > > > On Oct 25, 2016, at 09:56 AM, Stepan Z <motionarti...@gmail.com> wrote: > > Hello > > I'm using nuke studio to conform a few short edits, publish a source dpx > sequence and a nuke script. > > So i'm bringing in original alexa logc encoded prores files, and > publishing dpx sequence with logC set as the colorspace in the export > dialog. When i then bring over that dpx sequence back into NS and drop it > on top of the prores and disable all colour transforms (viewer to none > instead of sRGB and the per file transform to linear) perceptually the > files look identical. But when you sample a pixel or an area with the > viewer the rgb values after two decimal places seem to change when your > flicking between dpx and prores. > > Is this normal and is just the difference in encodings or should they be > exactly the same given that they come from the same file and are in the > same colourspace? > > > > > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > > _______________________________________________ > Nuke-users mailing list > Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
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