51
votes
Accepted
ffmpeg Color Correction: Gamma, Brightness and Saturation
These settings helped me to lighten up a dark video using the filter eq, with some added saturation.
Syntax:
filtername=option1=value1:option2=value2:option3=value3... These can be in any order.
...
- 1,683
18
votes
ffmpeg Color Correction: Gamma, Brightness and Saturation
Gamma correction is likely to be a better choice than brightness, to stretch the histogram to the right rather than push it over:
# tinker with numbers
ffplay -vf eq=gamma=1.5:saturation=1.3 original....
- 281
12
votes
ffmpeg Color Correction: Gamma, Brightness and Saturation
I'd also try curves:
ffmpeg -i input.vid -vf "curves=all='0/0 0.5/1 1/1'" -codec:a copy -codec:v libx264 -y output.vid
The 0.5/1 maps mid-range brightness (0.5) to full bright (1)
- 221
9
votes
Accepted
Leaving white balance for post-processing. Is it a bad idea?
Don't do white balance in post, you will regret it. The problem is that the footage your camera records is compressed. That means the sensor information is not stored in RAW, but encoded using lossy ...
- 5,402
9
votes
Accepted
What is the ffmpeg filter equivalent of "Automatic levels" for colors?
Here's the details on what the presets do:
[PRESET_COLOR_NEGATIVE] = {
"0/1 0.129/1 0.466/0.498 0.725/0 1/0",
"0/1 0.109/1 0.301/0.498 0.517/0 1/0",
"0/1 0.098/1 0.235/0.498 0.423/0 1/0",
...
- 32.3k
6
votes
Accepted
How to combine ffmpeg vf commands for resizing and color correction?
Filter complex isn't needed. When a series of filters are to be applied to a single input in sequence, they are to be separated with a comma and passed along as a single filterchain (-vf, -af). You ...
- 32.3k
5
votes
What are Grey Balls used for?
Yes, they are used for adding visual effects in post. The mirrored ball is for creating an environment map or reflection map. These maps provide the same lighting from the real scene to the virtual ...
- 2,156
5
votes
Accepted
Is there a "starting place" in terms of colour correction before adding a stylistic LUT
Applications such as FCPX and Adobe Creative Cloud actually ship with a wide variety of stylized LUTs, so if you use either of those you can play around with them. Most LUTs will specify what they ...
- 4,730
5
votes
How to color grade gold
Two thoughts:
Go to images.google.com and search for "gold". Find something you think is gold-colored, check its RGB values, and then use that as a target for your gold. Many editing programs have ...
- 4,730
5
votes
Accepted
ffmpeg vf scale shifts colors to washed out
The video's color transfer characteristics (trc) and color primaries flags are not being set on the output video, which is causing the video player to use incorrect values for playback, resulting in ...
- 311
3
votes
Color grading basics
I would look at some of the tutorials on YouTube. There are plenty of them.
If you want to get into grading; you can jump right in as long as you are shooting RAW; or at the very least; 4:2:2.
If ...
- 2,467
3
votes
Accepted
What are Grey Balls used for?
The grey balls are actually used like the grey cards but with added lighting data cause they are spherical and refer to the surrounding light sources better, they usually reflect 18% of the light and ...
- 146
3
votes
Upon export in Premiere Pro, colors lose saturation when previewing in QuickTime
I was seeing the same thing. Exported video when played in QT was washed out compared to what my preview was in Premiere. When I looked at the same rendered file in VLC it matched. so evidently the ...
- 31
3
votes
How to fix color "waves" in SpeedGrade?
That's the moiré pattern, which is caused when the camera debayers an image with fine details: Wikipedia about the Bayer Filter (see the Artifacts section)
Many cameras have this problem, some more, ...
- 797
3
votes
Accepted
Correct gamma for SMPTE ST-2084 EOTF
The short answer is: You don't pick a color space for your RAW material based on what kind of monitor you're using.
A color pipeline is a very complicated series of mathematical conversions, which is ...
- 4,414
3
votes
Accepted
Color correct to compensate for low blue
I am not very certain that I understand your question, but if you want to shift the color-grade of your image away from the orange, you can use the temperature to shift it towards blue, effectively ...
- 2,665
3
votes
Accepted
Change color to look as how a color blind person sees
With these values, I get the results shown below. Note that your color management settings in Resolve will affect your result, and so will the input color space of your source. To avoid ...
- 4,414
2
votes
How to colorise black and white movies?
Convert movie to pictures (1 second = 24 pictures ; so 1 hour = 86,400 pictures ; average 90 min. movie = 129,600 pictures). Colorize every individual picture using the DeepLearning API which gives ...
- 21
2
votes
How do I correctly use an ACES workflow with CinemaDNG footage in Davinci Resolve?
Currently there isn't a means to create an IDT for cinemaDNG footage in resolve.
cinemaDNG is a container and contains camera RAW data so it's precisely the kind of footage one would want to ...
- 131
2
votes
Accepted
fix a few videos with bad white balance?
I have used virtualdub with avisynth ColorYUV(autowhite=true)
it seem to have done an "ok" job
- 171
2
votes
Accepted
Desaturate shadows in Lightworks
In Lightworks, there's the selective color correction tool.
By moving the sliders like this you can select the shadows (luma slider) and desaturate them:
By clicking "Reveal" you can see which parts ...
- 33
2
votes
White balance auto-adjusted half way through recording
A1: Links like these mention that ProRes 'bakes in' the white balance (as opposed to storing it as separate metadata): blackmagicdesign.com forum ; reduser.net forum ; reduser.net forum ; ...
- 141
2
votes
Accepted
Why use Lumetri scopes?
The scopes are objective and absolute measures of the levels in your image. They aren't susceptible to the vagaries of human perception—colours and levels looking different depending on context—and ...
- 13.6k
2
votes
Source ProRes 422 Proxy / Edit / Export to ProRes 422 proxy?
Definitely proRes 422HQ.
While you won't gain anything by encoding in a higher quality codec, what you will do is avoid losing more.
Proxy codecs are just that: stand-ins for the real content, ...
- 13.6k
2
votes
Accepted
Davinci Resolve 15 - color correction of whole tracks
A couple of ways you can do this. My faforite is groups. In the color page, do this:
Shift click all of the clips you want to color correct at the same time. You can limit the clips shown on the ...
- 4,414
2
votes
Accepted
Why a color grading suite needs high CRI lamps?
The truth is that you do not need them... unless you do of course.
You only need good CRI for the ambient lamps if you need to compare colors with real-life things, probably the skin tone of someone, ...
- 1,152
2
votes
Accepted
White balance vs color correction
Regarding the standard procedure, the short version is:
get the colour looking correct but neutral, which is when you do corrections for white balance and exposure problems. The footage will look &...
- 13.6k
2
votes
Manual white-balance for non-neutral lighting
You're doing it wrong. For one, the 18% grey card is for exposure, use a white card for white balance. For two, the whole point of the white / grey card is that you expose it under the lighting ...
- 13.6k
2
votes
Recovering from an Automatic White Balanced mishap
DaVinci Resolve is industry standard for colour grading. However if you don’t need very special and specific functions in DaVinci Resolve, you can do the grading in FCP as well. In your situation I ...
- 727
1
vote
Accepted
Reapply video color autocorrection
If you want the “best possible results” I would recommend the following workflow, or similar variation thereof:
Export your captured video source to a JPG Image Sequence. This will create a JPG for ...
- 2,467
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