...but what happens when I run an image codec that has higher bit value than the core image chain or QC can handle? I'm not aware of documentation of "what's going on" in that scenario.
-GT On Tue, Dec 21, 2010 at 5:31 PM, vade <dokt...@mac.com> wrote: > Its really not that nuts once you take some things into account. > > The only gotcha in this is that Final Cut Pro calibrates to a predetermined > video gamma uses some standards based on whether or not you are running in > SD or HD. HD sources use the 709 color correction values, SD use 601. This > is because FCP is meant for pro output on calibrated monitors and for use > with video output boards for playout and record (to honest to goodness *video, > not computer* monitors). > > Quicktime and other apps calibrate to your display, which is the normal > computer output and expects different gamma and color responses than video. > Thus the optional pref in Quicktime to treat movies like FCP does, if thats > something you want to deal with. > > Apps like AE and Photoshop have color management workflows that you can > optionally enable, which take their best guess as to the source of a video > or file, and the destination colorspace you work in. Core Image and > Quicktime have similar input, working and output colorspace keys you can set > to ensure that you get what you want. > > This is *not* to say its not nuanced and tricky, and rife with possible > got-chas, but that its not really "nuts". > > > On Dec 21, 2010, at 5:10 PM, George Toledo wrote: > > > > On Tue, Dec 21, 2010 at 4:34 PM, Jason Belec <jasonbe...@rogers.com>wrote: > >> You can also work the default QC output to match (closely) and apply that >> to everything coming in. Ran into this in the past myself. >> >> >> > What would be imminently useful is solid, factual, info from Apple about > how to work around the color issue correctly (if this is *even possible*), > instead of "fudge it til it looks right", or "buy product X". > > Colorspace issues, Quicktime, CI problems, etc., in OS X is totally nuts, > and it needs to be resolved. > > -GT > >> >> On 2010-12-21, at 4:52 PM, vade <dokt...@mac.com> wrote: >> >> FCP does not use ColorSync to display video, it has its own color >> correction and gamma correction routines depending if you are running 601 or >> 709 formatted video. Quartz Composer, Quicktime and most other apps use >> ColorSync. >> >> If you have QT 7 installed on your system FCP installs a separate >> preference called Final Cut Studio Color Compatibility in to the QT prefs. >> Enable it, and Quicktime now uses the same color lookup as Final Cut Pro >> does. Open your comp, it should, hopefully, look the same. >> >> But this is almost certainly a color conversion routine. >> >> >> On Dec 21, 2010, at 1:32 PM, Patrick Sheffield wrote: >> >> The original image came from a BetaSP tape, but it doesn't matter - I see >> the same difference in all material. >> >> I didn't include a composition as all I'm doing is taking an input image >> and the Screen blend node and running it into both inputs, then the result >> to a billboard. If I do the same thing in FCP/Motion (place an image on >> V1/V2 with V2 set to Screen composite mode), the result is considerably >> different. I don't think Quartz is doing it wrong, I just need to figure out >> what FCP/Motion are actually doing... >> >> regards, >> >> Patrick >> >> On Dec 21, 2010, at 10:16 AM, George Toledo wrote: >> >> No composition? >> >> This makes it hard to discern. >> >> Try using Billboard, and adjusting native core image in settings, to see >> if that makes a difference. >> >> Where are these images coming from? They both have edge crud... is this >> from the screengrab? It looks like a gamma difference (but maybe not). Is >> that happening because the FCP image is coming from something that is >> already run through a codec? >> >> -GT >> >> On Tue, Dec 21, 2010 at 1:08 PM, Patrick Sheffield >> <<psheffi...@earthlink.net> >> psheffi...@earthlink.net> wrote: >> >>> >>> ...between how Quartz Composer processes the Screen blend mode and how >>> Final Cut Pro and Motion do it? >>> >>> This is an image screened over itself in Final Cut Pro/Motion: >>> >>> >>> >>> >>> And in Quartz Composer: >>> >>> >>> >>> >>> In Quartz Composer it's flatter and considerably more red than FCP. >>> >>> If I perform a Screen Blend (the inverse of the multiplication of the >>> inverse), I get the same result as Quartz, but I need to figure out what >>> FCP/Motion are doing differently. >>> >>> Does anyone have any insight? >>> >>> Thanks, >>> >>> Patrick Sheffield >>> Sheffield Softworks >>> >>> >>> _______________________________________________ >>> Do not post admin requests to the list. 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They will be ignored. >> Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) >> Help/Unsubscribe/Update your Subscription: >> >> http://lists.apple.com/mailman/options/quartzcomposer-dev/gtoledo3%40gmail.com >> >> This email sent to gtole...@gmail.com >> > > > > -- > George Toledo > gtole...@gmail.com > www.georgetoledo.com > > The information contained in this E-mail and any attachments may be > confidential. > If you have received this E-mail in error, please notify us immediately by > telephone or return E-mail. > You should not use or disclose the contents of this E-mail or any of the > attachments for any purpose or to any persons. > > _______________________________________________ > Do not post admin requests to the list. 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