Announcement

Collapse
No announcement yet.

Cineform Raw BMD Film Curve

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    Well then that curve is not the one used for ouput. It did look more like an encoding curve.

    Comment


    • #17
      Originally posted by David_Newman View Post
      Well then that curve is not the one used for ouput. It did look more like an encoding curve.
      So does that mean that's the curve that should be used when the DNGs are imported into CF Studio?
      Eddie Barton

      My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

      Comment


      • #18
        Originally posted by iaremrsir View Post
        So does that mean that's the curve that should be used when the DNGs are imported into CF Studio?
        No, we are optimizing encoding curves to withstand compression, i.e maintaining a wide dynamic range with a 5:1 reduction of data.

        Comment


        • #19
          Originally posted by David_Newman View Post
          No, we are optimizing encoding curves to withstand compression, i.e maintaining a wide dynamic range with a 5:1 reduction of data.
          Okay, that makes sense. This is kinda off topic from the main post but someone said that the Protune curve shows about 11 stops of dynamic range (can't remember where I read it). So why include "Optimize for 11 stops" in the options? Last question, is it possible to reverse engineer a curve from two shots - one in BMD Film and one in Rec. 709 - that are of reference charts?
          Eddie Barton

          My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

          Comment


          • #20
            There is only a slight difference between the "Optimize for 11 stops" and Protune, they are pretty much interchangeable.

            Working out the curve will be straight forward once we have a camera. I don't know which it is you see with a BMD Film vs Rec. 709, also for those using a CineForm workflow the native of these particular curve shouldn't matter.

            Comment


            • #21
              This is so cool... any progress made on an accurate curve that simulates BMD Film Log?
              Test footage Vimeo page: https://vimeo.com/romanalaivi

              Comment


              • #22
                Originally posted by Roman View Post
                This is so cool... any progress made on an accurate curve that simulates BMD Film Log?
                Not that I know of. David said once they have the camera they should be able to derive the curve.
                Eddie Barton

                My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

                Comment


                • #23
                  Ok I did some testing. And I got it pretty accurate.

                  I had to push the parameters around tough a little bit. And it seems to not read the metadata as Resolve does. I have one clip shot at ISO800 where
                  I had to push the exposure a lot, and another one at ISO200 where I had to move the exposure down again. The only difference is that BMDfilm
                  kinda pushes the blacks a little bit more. I couldnt get it to match perfectly because the lift control in GoPro-Studio is not so accurate. Everything else
                  matches tough just the blacks can/have to be lifted in Resolve.

                  The whitebalance tough is wayyyy different.

                  In Resolve for the DNG I have 5500 and tint 10. In GoPro Studio I have 6558 and -33.

                  Here are my settings (pushed gamma and lift around):2013-05-27_11h36_08.jpg


                  Attached you'll find an export from the flat image and graded with the default 709 LUT. gopro_1.3.1 Kopie.jpggopro_1.4.1 Kopie.jpggopro709_1.3.1 Kopie.jpggopro709_1.4.1 Kopie.jpg
                  EF-BMCC 1300x00 - the lucky one

                  Comment


                  • #24
                    Hmm the forum reduces the images.
                    Here are the full resolution JPEGS https://dl.dropboxusercontent.com/u/...ProBMDFilm.zip
                    EF-BMCC 1300x00 - the lucky one

                    Comment


                    • #25
                      Bump. Updated to more accurate settings on front page.
                      Eddie Barton

                      My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

                      Comment


                      • #26
                        Thanks, iaremrsir! So I guess David was never able to figure out the curve?
                        Marc Tschudi
                        pixelbreach.com

                        Comment


                        • #27
                          Originally posted by mtschudi View Post
                          Thanks, iaremrsir! So I guess David was never able to figure out the curve?
                          The reason it hasn't been added is because CF Studio is, how should I say... optimized for mathematical, logarithmic curves. BMD Film is not a mathematical log curve. Adding it would mean having to radically change the coding of the program.
                          Eddie Barton

                          My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

                          Comment


                          • #28
                            Originally posted by iaremrsir View Post
                            COPY -> SELECT ALL -> PASTE

                            That should apply the curve to all of your clips.
                            You can also 'ADD' this as a PRESET to quickly apply it to newly converted files.
                            Nice job Iaremrsir!
                            Cheers!
                            Jake Segraves
                            filmmaker @kindfilms
                            creative content producer @tetravue

                            Comment


                            • #29
                              I can't find "Ouput Curve" or "Cineon 95-685." Is it not in the Mac version, or am I missing something?
                              Marc Tschudi
                              pixelbreach.com

                              Comment


                              • #30
                                Originally posted by mtschudi View Post
                                I can't find "Ouput Curve" or "Cineon 95-685." Is it not in the Mac version, or am I missing something?
                                Mac doesn't do CinemaDNG raw yet
                                Eddie Barton

                                My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/

                                Comment

                                Working...
                                X