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Roger Bansemer
V-log question
on Jan 23, 2016 at 5:07:39 pm

I'm still trying to figure out this V-log thing. I've installed Vegas13 and applied the Sony lut but it doesn't seem to do anything. What am I missing?
Thanks
Roger
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Roger Bansemer - PaintingAndTravel.com


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Shinra Bansho
Re: V-log question
on Jan 24, 2016 at 6:15:25 am

You might still need to apply a LUT (Look Up Table).

Please refer to the page below:

http://suggestionofmotion.com/blog/sony-vegas-pro-lut-workflow-visioncolor-...

Somehow the download link to the Panasonic LUTs in the article is not working but I believe it is "VariCam 35 3DLUT V-Log to V-709" the article referred to at the Panasonic site.

http://pro-av.panasonic.net/en/varicam/35/dl.html

Good luck.


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Roger Bansemer
Re: V-log question
on Jan 24, 2016 at 3:39:11 pm

Thanks. That helps explain a lot.
So, right now I've got the V-log plugin for Vegas but no lut tables. I saw there were a few free luts but were designed mainly to look like film. Not sure I want that but I'll look around for others.
Thanks again.
Roger

Roger Bansemer - PaintingAndTravel.com


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Shinra Bansho
Re: V-log question
on Jan 25, 2016 at 1:22:11 am

I believe that the "VariCam 35 3DLUT V-Log to V-709" which you can download from the Panasonic site can be used to get ordinary video-looks (BT.709 for HDTV standards). I tested it and it seemed to work.

Shooting in LOG, if properly shot, is said to yield wider dynamic range videos so it might not necessarily be "film-look". However, in order to get the most out of such LOG files, people say that we need at least 10 bit 422 color sampling space hence, in GH4 terms, we realistically need an external recorder such as Atomos Shogun/Ninja Assassin. It's not an option for me (at least for now).


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Roger Bansemer
Re: V-log question
on Jan 25, 2016 at 2:24:14 pm

Hi Shinra,
I downloaded the panasonic 709 LUT. I'm getting the gist of this a bit more but there are several files included in the lut.
They include a txt, cube, and vlt file.
The vlt file when applied gives horrible crazy color results. The cube and the txt file work to punch up the color but when applied but the subtle dark areas where I could see detail before the lut was applied have disappeared and I thought that was the point of the lut, to be able to maintain those subtle nuances.

Question:
1 Which of those files should I apply, the txt, cube, or vlt?
2 After it has been applied, would it be common to go in with other plugins and adjust more from there?
3 It seems I can get as much from simply applying my curves, color correction, etc without using the LUT. Am I right or wrong in thinking that?

Thanks for your help. Still trying to get a handle on this.
PS. I'm using the new Panasonic DVX200 camera

Roger Bansemer - PaintingAndTravel.com


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Shinra Bansho
Re: V-log question
on Jan 25, 2016 at 11:49:07 pm
Last Edited By Shinra Bansho on Jan 26, 2016 at 4:14:09 am

Apologies that I incorrectly assumed that you were using a GH4. For DVX200, I suggest that you try the following page (you can download the LUT specific for DVX200).

http://pro-av.panasonic.net/en/products/ag-dvx200/exp.html

1. Difference in the files

.TXT : Compatible with Quantel Pablo
.Cube : Compatible with Davinci Resolve
.VLT : Compatible with VariCam 35,AG-DVX200,AG-GH4U

By the way, you could open .cube and .vlt in Windows Notepad where you could see, I believe, a combination of RGB values.

2. LUT is just a conversion table as to how a flat-looking LOG-shot file should look like in an intended viewing environment (e.g. REC 709). After applying a LUT, you are naturally expected to further work in post to take advantage of a wider dynamic range LOG files, which is the whole point.

3. Ultimately I think you are free to work in post without a LUT. I am sorry but my experience with LOG is limited. There appear to be some good LOG samples on YouTube using DVX200 and might I suggest that you view (or search Google) to decide whether or not you should continue to work in LOG?


















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Roger Bansemer
Re: V-log question
on Jan 26, 2016 at 7:43:40 pm

Hi Shinra,
Thanks for all your help with this. I'm still having difficulty figuring this out. I downloaded the LUT tables you suggested (vlog to 709 for DVX200) and here are my results after applying all of them.
As you can see, the detail in the trees on the original clip have all been lost after applying the lut.
And that third .vlt lut really makes the colors all crazy.
I must be getting something terribly wrong here but I don't know what it is.
Thanks so much.
Roger


Roger Bansemer - PaintingAndTravel.com


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Shinra Bansho
Re: V-log question
on Jan 27, 2016 at 6:14:14 am

Hi Roger,

Since I know nothing about DVX200 as to how it should be set up to achieve the best results out of log files, may I suggest that you refer to this 279 pages guidebook (free from Panasonic) specifically written for DVX200? It seems to have a fair amount of helpful info on v-log and LUTs.

http://info.panasonic.com/dvx200-ebook.html

Also pages like below should be helpful.

http://www.newsshooter.com/2015/08/25/panasonic-dvx-200-review-part-2-v-log...

Best regards.


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