GH5 A complicated question on Lumix GH5, to get good shots in Africa

The last questions please, since I've never worked with V-Log. How important is a lut to work more quickly? Is it possible to first apply the lut and then change the grading to your liking? Can this be done to make up for time? Or doing so doe you not take full advantage of the potential of V-Log?
 
If the camera is able to load LUTs or has built-in previewing LUTs then you can use them to view how your image looks with your chosen exposure and white balance while you're shooting.

If it doesn't have any LUTs, you'll have to use an external monitor/recorder with LUT capability.

Then in post later, you'd apply the LUT you used while shooting on your LOG footage, and it would look like what you saw when you were shooting.

Some people also record/"bake in" a LUT into recordings with an external recorder. This process is done for the fastest turnaround time as the footage is instantly graded.

However, it's very important to be sure that that's the look you want or the LUT you want because it's a final destructive process that may limit DR and change colors that cannot be changed later.

Many professionals do both at the same time (if possible): record LOG internally and record baked-in LUTs externally. That way they have instantly ready footage to save time and also the ungraded LOG files in case the footage needs to be color graded differently.
 
FoxAdriano said:
The last questions please, since I've never worked with V-Log. How important is a lut to work more quickly? Is it possible to first apply the lut and then change the grading to your liking? Can this be done to make up for time? Or doing so doe you not take full advantage of the potential of V-Log?
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You can load what is called Preview LUTs into the GH5. This gives you an idea of what the footage will look like, but it is not baked into the final footage, so you can grade to your liking in post. The preview LUTs still allow the full potential of V-Log to be used in post. As a matter of fact, there is a default Rec-709 preview LUT built into the camera.
 
Mybe I maybe I asked the question badly. I rephrase the question:
Before using the lut, on the timeline you have to roughly grading the clip and lastly apply the lut. Otherwise the V-Log potential is not fully exploited. Is it right?
 
FoxAdriano said:
Mybe I maybe I asked the question badly. I rephrase the question:
Before using the lut, on the timeline you have to roughly grading the clip and lastly apply the lut. Otherwise the V-Log potential is not fully exploited. Is it right?
Click to expand...

You can do either. You can grade the clip and then apply a LUT to get the look that LUT will give you, or you can apply a general LUT to bring the footage into the regular color space and then adjust to taste.

It all depends on how good you are at color grading.
 
FoxAdriano said:
Mybe I maybe I asked the question badly. I rephrase the question:
Before using the lut, on the timeline you have to roughly grading the clip and lastly apply the lut. Otherwise the V-Log potential is not fully exploited. Is it right?
Click to expand...
I usually recommend using the Panasonic V-Log to Rec-709 conversion LUT as a starting point, then adjusting your footage to your liking from there. You can try that with the footage I gave you before.
 
In these days I have learned to do grading with waveforms in post. Now I'd like to better understand the waveform in shooting time. In the GH5 LCD screening I know that the top margin (broadly and generally) must not exceed 80% in height in the graph. I'd like to know if the bottom margin of the wave has to be "0" (zero). In a nutshell, how should the optimal waveform be positioned in the graph?
 
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FoxAdriano said:
In these days I have learned to do grading with waveforms in post. Now I'd like to better understand the waveform in shooting time. In the GH5 LCD screening I know that the top margin (broadly and generally) must not exceed 80% in height in the graph. I'd like to know if the bottom margin of the wave has to be "0" (zero). In a nutshell, how should the optimal waveform be positioned in the graph?
Click to expand...

Same as in post.
 
FoxAdriano said:
Mybe I maybe I asked the question badly. I rephrase the question:
Before using the lut, on the timeline you have to roughly grading the clip and lastly apply the lut. Otherwise the V-Log potential is not fully exploited. Is it right?
Click to expand...

You can apply a LUT and then still apply corrections to the footage at the pre-LUT stage of processing to access the full image information before the LUT was applied. But sometimes it will look good with just the LUT plus minor tweaks after applying the LUT.

In other words, if you apply a LUT and it blows out your highlights, you can still pull down your highlights at the stage of the LUT or before the LUT, depending on how your NLE operates. Or, if it's a problem shot, you can grade it without a LUT and essentially design your own LUT that you can use for that shot and similar shots.

Personally, I shoot using a preview (standard rec709) LUT so I can see what the image will look like after grading. But I use the waveform monitor to see if my highlight detail is being retained, and I lower the exposure and also check the image without a LUT if there's a risk that my highlights are going to blow out.
 
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FoxAdriano said:
In these days I have learned to do grading with waveforms in post. Now I'd like to better understand the waveform in shooting time. In the GH5 LCD screening I know that the top margin (broadly and generally) must not exceed 80% in height in the graph. I'd like to know if the bottom margin of the wave has to be "0" (zero). In a nutshell, how should the optimal waveform be positioned in the graph?
Click to expand...

No one can answer that without seeing the scene you are shooting. DO SOME TEST SHOTS AND EVALUATE THE RESULTS.
 
Maybe my mind is crock, allow me a question: out of curiosity, I know that the 180 ° rule is important in the video. If I shoot 25p 10bit 422 with my GH5 and I use Rec. 709, in order to maintain the 180 ° rule, I have to shoot 25p and 1/50 shutter speed. My question is: what are the other shutter speeds that I can use to maintain this 180° rule?
thank you!
 
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estarkey7 said:
No one can answer that without seeing the scene you are shooting. DO SOME TEST SHOTS AND EVALUATE THE RESULTS.
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Hey, you are professional .... but you haven't figured out yet that I can't do any tests when I shoot my videos in Africa for the huge amount of light and for the subject that I have to film. I can take tests in my country, but then everything changes in Africa. Here where I live my videos are perfect, even without doing tests. ;)
 
FoxAdriano said:
Maybe my mind is crock, allow me a question: out of curiosity, I know that the 180 ° rule is important in the video. If I shoot 25p 10bit 422 with my GH5 and I use Rec. 709, in order to maintain the 180 ° rule, I have to shoot 25p and 1/50 shutter speed. My question is: what are the other shutter speeds that I can use to maintain this 180° rule?
thank you!
Click to expand...


Just use the shutter angle setting instead of shutter speed. and then you don't even have to think about it.
 
FoxAdriano said:
Hey, you are professional .... but you haven't figured out yet that I can't do any tests when I shoot my videos in Africa for the huge amount of light and for the subject that I have to film. I can take tests in my country, but then everything changes in Africa. Here where I live my videos are perfect, even without doing tests. ;)
Click to expand...

For the life of me, every videographer I know uses either a fixed or variable ND filter to deal with situations where you have too much light. It's a must have in the bag for doing video work.

I'm s Software Engineer, not a professional video guy.
 
estarkey7 said:
Just use the shutter angle setting instead of shutter speed. and then you don't even have to think about it.
Click to expand...

Please, could you be more detailed please? English is not my mother language. What do you mean with "Just use the shutter angle setting ".
Thank you!
 
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estarkey7 said:
For the life of me, every videographer I know uses either a fixed or variable ND filter to deal with situations where you have too much light. It's a must have in the bag for doing video work.
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Sorry, where did you read I don't have a variable ND filter? I bought the best ND filter but my hands and my mind are not good for the GH5. :shocked: ahahahaha
 
FoxAdriano said:
Please, could you be more detailed? English is not my mother language. Do you mean you always shoot 1/50?

Thank you!
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You can switch between shutter speed and shutter angle in the settings menu. Then you just set the shutter to 180° and you don't have to figure out the speeds if you change fps.

As for your original problem, it all comes down to the lighting conditions. The skin tones in the first clip (the 'bad' one) have a reflection of the overcast sky, so they appear desaturated. But that's just because of the conditions. There's nothing wrong with that image.
As for mid-levels and colours, you saved highlight detail in the sky, but that means your mid-levels are a bit less exposed. So colours will appear more washed out and the darks get crushed more. Again, normal if you shoot that way.

As stated before in this thread, use Vlog-L or HLG to get the maximum dynamic range. If you are uncertain about Vlog-L, HLG might be an easier choice. Although you can set a monitor Lut to make shooting with Vlog just like with other profiles.

But in the end, you need to be aware that different light conditions will yield different results. Especially with extremely bright light and a camera that has a dynamic range of about 11 stops.
If you get to extreme situations, you have to choose. Either expose skin tone and mid-levels as usual and blow out highlights. Or protect highlights and underexpose other parts of the image.
To avoid having to choose as long as possible, shoot in Vlog-L or HLG.
 
Yes, really interesting reply, thank you. But ... out of curiosity, could you tell me what is usually your shutter speed when you use it in 25p?
 
FoxAdriano said:
Maybe my mind is crock, allow me a question: out of curiosity, I know that the 180 ° rule is important in the video. If I shoot 25p 10bit 422 with my GH5 and I use Rec. 709, in order to maintain the 180 ° rule, I have to shoot 25p and 1/50 shutter speed. My question is: what are the other shutter speeds that I can use to maintain this 180° rule?
thank you!
Click to expand...

There are no other shutter speeds to maintain the rule. There is only one for that framerate; 1/50. (Or 1/100 for 50p.)

With 25p, if you increase it or decrease it - say to 1/60 or 1/40 - then it's not 180° anymore but now 150° or 225°.
 
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