Messages

1

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 09, 2021, 07:53:03 AM »

Hi, everyone.

I want to shoot with Cinema DNG with Chronos 2.1 Ver.0.7.0.
But I couldn't get the right color!
I searched for a solution for a while, finaly, I reached to the X-rite ColorChecker Passport 2.

https://www.youtube.com/watch?v=xL2BWQRJbv8&t
↑Sorry, this is japanese clip.

I hesitated to pay close to $ 200 for this color chart, but the results were very very good. I wanted this color! I was finally able to reach it.

https://www.youtube.com/watch?v=q-k7MYPWbIw&t
Thank you!

Hello Takashima san. Beautiful colors! Looking forward to seeing more of your videos.

2

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 06, 2021, 11:14:21 PM »

Hi muringuets, once you have the color correction figured out for a given light source, you should be able to create your own LUT (look-up-table), and then just apply that to any new footage shot in the same conditions.  That is how the process is designed to work with a color chart, shoot once with it, in sunlight, or your artificial lights, etc., use a VectorScope (in software) to dial in objectively perfect colors, or as close as possible, save the LUT, and then you can apply that to future footage with no extra effort or ever having to shoot the color chart again in the same lighting conditions.

Sorry for the long-winded response if you already understand this process.

Basically, shooting in Cinema DNG on the Chronos is now even more like shooting in Log or other various Raw formats on conventional video cameras.  Usually, the camera supplier will provide a basic LUT to start with, which is what is missing for us (for now).  For example, Canon provides a Log2->Rec709 LUT, Log3->Rec709, etc.  It is very challenging to start from scratch if you don't really know what you're doing.  For example, adjusting just white balance, tint, color temp, and global saturation is not going to work.  Those adjustments are meant to tweak the final color look, but wont get you from Log (or Cinema DNG in our case), to Rec709.

I would say it would be almost impossible to get objectively correct colors from Cinema DNG without a color chart. 

I like using the X-Rite ColorChecker Video.  It looks like it's been discontinued, but there is a newly name-branded version coming soon:

https://www.bhphotovideo.com/c/replacement_for/1191325-REG/x_rite_msccvpr_colorchecker_video.html


You mentioned that you use DaVinci Resolve.  The process of creating custom LUTs is super easy in that environment.  You can right-click on a clip in the color correction tab and there is a "Generate LUT" option right there where you can create a custom LUT from your existing correction.  The Gerald Undone video I linked in an earlier post shows this in more detail.

FWIW, I do a lot of video work with not just the Chronos, but things like a Canon XF-705, and various DSLRs.  I waited WAY too long before I got a proper color calibration chart and learned how to use it.  It makes all the difference in the world!


 

Hello mklinger. I’ve followed your instructions and colour corrected 2 clips, the result is much better now than before! I was just doing quick tests, will dive in more deeply in the near future.

3

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 06, 2021, 07:05:21 PM »

if anyone has a bunch of spare time, there is also a bunch of unstable 0.7.x Releases from before the Official 0.7.0 Stable Release:
 http://debian.krontech.ca/builds/
 Maybe one of them is different in terms of color. Whoever feels the need to or has the Time To do so, can also test them/ play around with them.
 Still havent looked at them, as i so far didnt even have time to propperly test the Stable Release, but downloaded and Archived them, as they probably will be gone sooner or later (as the 5.1 Unstable is long gone now), just in case they are usefull/ better for some resolution/ Setting i might need/ want at some point in the Future.
 So might be a good idea to download for anyone who wants to do some testing at some point, as long as they are still there.

Hello Nikon1. Thank you for the links to the unstable releases. You’re absolutely right about testings, I think I just might test them all.

4

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 06, 2021, 06:43:35 PM »

I still think quality wise 0.6.0 was a little better, the DNGs are coming out with a lot of color noise, and a nasty pink/magenta tint that I did not have before...

One quick thing, double check that you updated all the way to version 0.7.  The pink/magenta cast was a big problem with 0.6 but I found it was pretty much completely fixed in 0.7 except for very high gain situations at low resolutions. 

If you were at version 0.5, I'm not sure if the camera would auto-update all the way to 0.7, or if you need to update to 0.6 first.  Anyway, before you pull your hair out too much, re-check the software version on the camera to make sure it is indeed 0.7 especially if you came from 0.5.

I need to check the release 0.7 in case they changed something drastic from the alpha 0.7 I was testing, but as you can see from this video, the pink cast was a major problem with v6 and almost completely fixed with v7 in my experience:

https://youtu.be/a4dAjT9dE0k

Hello mklinger. Thank you very much for your explanation and review on V0.7.0. I'll definitely work on the DNG a bit more, like grading log from scratch.

5

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 06, 2021, 04:33:02 AM »

Hello Takashima! I saw a clip from Youtube Channel, 【Slow Motion】キアゲハの求愛【Chronos 2.1 Highspeed】, may I ask, is the color shift from Cinema DNG only? Because I have this problem after upgrading to V0.7.0. Thank you very much for your time.

Hello Tiny san. Thank you for watching my YouTube video!
I also have trouble with Cinema DNG, after upgrading to V0.7.0. As Tiny-san said, DNG color is very very shallow. I tried various things in Lightroom, such as increasing the saturation, adjusting the color temperature and Tint, but I could not get the color as I wanted.
------ I can do well with 0.5.1.


But when I recorded it in H.264, I got a very natural and beautiful color video. I've been recording with CinemaDNG for a long time, but with 0.7.0, I feel that switching to H.264 seems to make me happier.

The following two movies both have some color adjustments in Finalcut Pro.

↓Cinema DNG, Ver.0.7.0   Color is strange.
https://www.youtube.com/watch?v=bZ5VMazF788

↓H.264, Ver.0.7.0
https://www.youtube.com/watch?v=G94gvbVhOIg

Hello Takashima san. Thank you very much for your time! I'm having the exact same problem like both your clips. I've also tried tweaking the color temperature and tint, no luck to getting the color of cinema DNG files close to the H.264 ones. I'm switching back to V0.6.0 for the time being. Thanks again Takashima san for your time.

6

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 05, 2021, 07:44:07 PM »

Thanks! 0.7.0 is very nice!
My camera is 2.1, and I always use 0.5.1.

In 0.7.0, especially when saving as H.264, the color is very beautiful.
On the other hand, I feel that it has become very difficult to handle the colors of CinemaDNG.
I'm thinking about shifting to 0.7.0 and shooting H.264 to the main.

Thank you.

Hello Takashima! I saw a clip from Youtube Channel, 【Slow Motion】キアゲハの求愛【Chronos 2.1 Highspeed】, may I ask, is the color shift from Cinema DNG only? Because I have this problem after upgrading to V0.7.0. Thank you very much for your time.

7

Software Dev / Re: Chronos V0.7.0 Full Release

« on: September 04, 2021, 06:55:11 PM »

Hello Everyone,

Just upgraded to V0.7.0 yesterday and there's a color shift of the white balance while saving in Cinema DNG. Saving in H.264 is fine. Does anyone have the same problem? No matter how I set the white balance, the color is off saving in Cinema DNG. I.ve attached 2 screen cap for comparison.

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Chronos User Discussion / Re: Chronos 2.1 resolution/speed table

« on: August 02, 2021, 06:08:45 AM »

Great post and great work! Thank you for sharing.