[Tig] QC a DCP

Bengt Ove Sannes bengtove at hocusfocus.no
Sat Feb 18 19:34:47 GMT 2012

If your only concern is compression and color conversion, you should 
probably QC the raw JPEG2000 streams rather than an the DCP (as 
JPEG2000 decoding support is way more common than DCP playback 


On 18. februar 2012 20:22:20, Carl Skaff wrote:
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> ====
> Hey all
> Here is topic for discussion.
> How do people QC a DCP?
> In the old days (not too long ago) we used to shoot out to Neg and then to
> a Print.
> Then the best way to QC the print was (if you ask me) to do a butterfly
> splitscreen between the digital projector (playing the graded DPX on your
> grade-system) and the analog film projector.
> That way we could check that the grade was ok and translated fine with our
> LUTs and we could determine if the added/removed grain/noise works fine
> with the filmgrain. Etc etc
> Now when we deliver DCP it should be possible to have a smart application
> that can play the graded DPX in splitscreen to the DCP.
> I suppose it should be fairly easy if you are on a DCI projector in P3, XYZ
> bla bla bla and all that.
> But if I was to grade on a Rec709 monitor/projector I suppose the app would
> need to be able to load the correct convertionLUTs on either side.
> That way we could QC the DCP, not only to check the convertion but also
> make sure that the compression didn't mess it up. And if we see an artifact
> we could just wipe over the original DPX to compare.
> Anyone know of such an app or am I thinking about this the wrong way?
> How do YOU qc your dcp?
> /Carl
> (Sent from mobile device)
> ____________________________
> *Carl Skaff*
> *Colorist*
> Stopp Stockholm
> Office +46 8 50 70 35 00
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