Thread: V-Log LUT

Page 5 of 5 FirstFirst 12345
Results 41 to 46 of 46
  1. Collapse Details
    #41
    Senior Member
    Join Date
    Jun 2008
    Location
    Denver, Colorado
    Posts
    964
    Default
    Quote Originally Posted by Shirozina View Post
    Sorry - trying to work through my own issues with RCM late at night while offering advice to others is not a good idea.
    No apology needed. Thanks for the helpful inputs and keep'em coming.


    Reply With Quote
     

  2. Collapse Details
    #42
    Senior Member
    Join Date
    Jun 2015
    Posts
    313
    Default
    I did some more testing in Resolve today and found out that in either an RCM timeline (REC709) or doing a color transform on each clip in a non CM timeline the key thing is to leave the options for tone and gamut mapping off (none) Although this then looks very clipped in the scopes and over exposed if you set the pivot value to zero and then use contrast to pull the data back within the REC709 range it can be easily graded with the wheels and looks very good indeed with the absence of the highly compressed highlights that comes with the auto tone mapping options and general 'milkeyness' that people complain about. I know it's not a quick fix but it is the best looking result I have got so far in getting HLG into REC709 by far! (It also does wonders on S-LOG )


    Reply With Quote
     

  3. Collapse Details
    #43
    Senior Member Cary Knoop's Avatar
    Join Date
    Jan 2017
    Location
    Newark CA, USA
    Posts
    1,559
    Default
    Quote Originally Posted by Shirozina View Post
    I did some more testing in Resolve today and found out that in either an RCM timeline (REC709) or doing a color transform on each clip in a non CM timeline the key thing is to leave the options for tone and gamut mapping off (none) Although this then looks very clipped in the scopes and over exposed if you set the pivot value to zero and then use contrast to pull the data back within the REC709 range it can be easily graded with the wheels and looks very good indeed with the absence of the highly compressed highlights that comes with the auto tone mapping options and general 'milkeyness' that people complain about. I know it's not a quick fix but it is the best looking result I have got so far in getting HLG into REC709 by far! (It also does wonders on S-LOG )
    Conlorspace transformations project the full dynamic rango onto the target colorspace. So in case of a Rec.709 target colorspace, which is very narrow, it is as designed that the resulting range spans beyond 100%. It's not a bug, it's truly a feature!

    It is up to the color corrector/grader to map the wide range onto the small Rec.709 range. Usually this is done by rolling off the blacks and whites with an s-curve, the point here is to keep the midtones as much having the natural contrast while the extremes have to be compromized. In that sense grading HDR is actually easier (provided you have a good monitor) than SDR, for SDR you need to go through more hoops.

    I personally would stay away from tonemapping (with the possible exception of mapping over 1000 nit values for HDR), it's like one of those 'auto modes' or LUTs which will never fit for all scenes.


    Reply With Quote
     

  4. Collapse Details
    #44
    Senior Member
    Join Date
    Jun 2008
    Location
    Denver, Colorado
    Posts
    964
    Default
    Quote Originally Posted by Cary Knoop View Post
    Conlorspace transformations project the full dynamic rango onto the target colorspace. So in case of a Rec.709 target colorspace, which is very narrow, it is as designed that the resulting range spans beyond 100%. It's not a bug, it's truly a feature!

    It is up to the color corrector/grader to map the wide range onto the small Rec.709 range. Usually this is done by rolling off the blacks and whites with an s-curve, the point here is to keep the midtones as much having the natural contrast while the extremes have to be compromized. In that sense grading HDR is actually easier (provided you have a good monitor) than SDR, for SDR you need to go through more hoops.

    I personally would stay away from tonemapping (with the possible exception of mapping over 1000 nit values for HDR), it's like one of those 'auto modes' or LUTs which will never fit for all scenes.
    Shirozina's use of contrast/pivot accomplishes just that, a method I have used as well. It's effective because the pivot conveniently adjusts the center point of the s-curve and compresses the ends to map the curve into the 709 target space. Whether it's done that way or some other, the practical consideration remains in handing off footage of this type to the client that it's dumping a workload of tone mapping on his desk. An average wedding from me is 4-5 hours of footage spanning 90-95 clips in all types of light. The tone mapping of V-LogL saves a lot of work in this regard because it's close enough to need few if any adjustments for most scenes.


    Reply With Quote
     

  5. Collapse Details
    #45
    Senior Member
    Join Date
    Jul 2014
    Location
    Youngstown, Ohio
    Posts
    393
    Default
    Quote Originally Posted by DeeZiD View Post
    Should rather go to Resolve and use either ACES or RCM to do that instead of converting to Rec709 first and then Rec2020. That's kinda like changing resolution to SD first then resizing to 4K again lol.
    Yeah, that's true.

    I guess I also made a mistake of lumping Rec-2020 into an HDR grading, since they are often used in tandem. If you had a monitor that can resolve the Rec-2020 color space and a graphics card that did 10-bit output (I have an AMD Pro Card that does), then you could simply use Premiere's Rec-2020 export feature.


    Reply With Quote
     

  6. Collapse Details
    #46
    Senior Member
    Join Date
    Aug 2008
    Location
    USA
    Posts
    2,900
    Default
    So the shoot occurred, the rentals were returned, the footage graded and delivered.

    I shot with V-Log and colored using ACES in Resolve. Footage looks awesome! Thanks everyone for all the help.


    Reply With Quote
     

Page 5 of 5 FirstFirst 12345

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •