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Andrew Reid

Panasonic GH5 - all is revealed!

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I have an important question.

Where are these people who make testvideo's getting their GH5's from? Did Panasonic contact them? Did they contact Panasonic? 
I have a wedding coming up soon and would love to use it but I guess that's not going to happen.

And did they 'borrow' a pre-production model or simply received one? How does that even work?

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1 hour ago, Ken Ross said:

I was under the impression you were talking about graded footage.

I was and am. But grading, any grading, is not why macroblocking turns up. With some effort you can quantize colors but that's not macro blocking.

Two more samples from Neumann. Once you see it you can not unsee it. Could be that there is a bug with AWB. Maybe someone can test it out. If so then Panasonic should fix it pronto as it's there since Vlog was released for the GH4.

LukeSnowFace_MaBl_01.jpg

LukeSnowFace_MaBl_02.jpg

snow_MaBl_01.jpg

snow_MaBl_02.jpg

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1 hour ago, Dimitris Stasinos said:

I don't get it... What has white balance to do with macroblocking? All I am seeing in those extreme gradings above is color banding, which is normal after such a push in post. Macroblocking is a compression artifact...

Color banding and macroblocking are related. "encoding blocks" are small clusters of the same color, so for example the 8bit banding of the sky can get exaggerated with the macroblocks of compressed bands in the sky. 

If WB is far off then color tonalities will be off and that can also create banding & macro blocks, but in this case WB was correct. 

In the specific example the bunk posted (4th picture) there is a lot of macroblocking on the skin. 

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1 hour ago, Dimitris Stasinos said:

I don't get it... What has white balance to do with macroblocking? All I am seeing in those extreme gradings above is color banding, which is normal after such a push in post. Macroblocking is a compression artifact...

I should have used the term 'YUV chroma smearing' ...it's been a while.

Here are two link where Lpowell explains about it.

http://www.dvxuser.com/V6/showthread.php?340370-Exposing-V-LOG-L&p=1986578386&viewfull=1#post1986578386

http://www.dvxuser.com/V6/showthread.php?340370-Exposing-V-LOG-L&p=1986578534&viewfull=1#post1986578534

 

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The bad news is  Pampuri's 'Constance & the Flowers' was shot a 10 bit ...and it's the worst footage I have seen (YUV chroma smearing wise). The YUV chroma smearing as explained by LPowell applies to 8 bit. So something fishy is going on.

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47 minutes ago, bunk said:

Good to know, I always called that macroblocking. S-log with A7* has the same issue. 

In the second link he mentions that sometimes it can occur in higher quality profiles as well. 

Hopefully the 400mbps intraframe looks better. 

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2 hours ago, jonpais said:

 

Still can't work out why youtube in Chrome makes the blacks so crushed when VLC and Premiere display the 0-255 file without problems in the 16-235 space. And if you fix it to 16-235 then it can look washed out if those other programs are trying to display full range. So which do you aim for? This file as it is, is absolutely amazing to view, just not on youtube. Here's a recompress to 16-235 

 

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48 minutes ago, Orangenz said:

Still can't work out why youtube in Chrome makes the blacks so crushed when VLC and Premiere display the 0-255 file without problems in the 16-235 space. And if you fix it to 16-235 then it can look washed out if those other programs are trying to display full range. So which do you aim for? This file as it is, is absolutely amazing to view, just not on youtube. Here's a recompress to 16-235 

 

That and the mystery why I can no longer watch videos on YouTube in 4K with Safari. But I don't have a 4K monitor anyway. Correction: I know why, how long till Apple fixes it?

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On 2/18/2017 at 10:30 AM, sudopera said:

Some footage from James Miller.

Highlight rolloff looks very good when recorded externaly with his baked in LUT.

 

Looks nice, but his style of color grading makes almost every camera he tests look the same.

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1 hour ago, BenEricson said:

Looks nice, but his style of color grading makes almost every camera he tests look the same.

I agree, his LUTs are quite stylized and a bit too much mostly for my taste but in this video it works well for me, especially the outdoor scenes.

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6 hours ago, Orangenz said:

Still can't work out why youtube in Chrome makes the blacks so crushed when VLC and Premiere display the 0-255 file without problems in the 16-235 space. And if you fix it to 16-235 then it can look washed out if those other programs are trying to display full range. So which do you aim for? This file as it is, is absolutely amazing to view, just not on youtube. Here's a recompress to 16-235 

 

Even at 16-235, the blacks are way crushed on my iMac. I had a look at the original scene from Goodfellas, and of course, there is much more detail in the shadows. And Levi said he was careful not to clip the blacks, a term which I'd never heard before; I've always heard clipped highlights and crushed blacks... Clipping refers to blown highlights. So when they're looking at the clips on the timeline in Resolve and say what lattitude Vlog has, I'm not seeing it in the final result. Also, the sound engineer says the internal preamp on the GH5 has a low S/N ratio, whereas I believe he meant to say high, because a higher number reduces the perceived noise. But I don't want to be too critical, after all, how many camera reviewers also have some acting chops? :) 

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1 hour ago, jonpais said:

Even at 16-235, the blacks are way crushed on my iMac. I had a look at the original scene from Goodfellas, and of course, there is much more detail in the shadows. And Levi said he was careful not to clip the blacks, a term which I'd never heard before; I've always heard clipped highlights and crushed blacks... Clipping refers to blown highlights. So when they're looking at the clips on the timeline in Resolve and say what lattitude Vlog has, I'm not seeing it in the final result. Also, the sound engineer says the internal preamp on the GH5 has a low S/N ratio, whereas I believe he meant to say high, because a higher number reduces the perceived noise. But I don't want to be too critical, after all, how many camera reviewers also have some acting chops? :) 

On the various TV's we have around the 16-235 looks grey'd out but the 0-255 looks great, especially on a new 4k tv. The bit before standing in front of the bookcase looks better at 16-235 though. The first image on video is the scopes for 0-255 which certainly looks like something's been crushed a bit which means it won't come back completely from my tweak. So, yeah, depends on what I'm viewing it on with what player. A lot of stuff is going on in that 0-20 area so it makes a big difference for this video. 

Panasonic GH5 Test  Wooden Niccolls with DDG.00_00_40_14.Still002.jpg

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4 minutes ago, Orangenz said:

On the various TV's we have around the 16-235 looks grey'd out but the 0-255 looks great, especially on a new 4k tv. The bit before standing in front of the bookcase looks better at 16-235 though. The first image on video is the scopes for 0-255 which certainly looks like something's been crushed a bit which means it won't come back completely from my tweak. So, yeah, depends on what I'm viewing it on with what player. A lot of stuff is going on in that 0-20 area so it makes a big difference for this video. 

Panasonic GH5 Test  Wooden Niccolls with DDG.00_00_40_14.Still002.jpg

It looks better with your settings on my lowly iMac which apparently is a piece of shit according to one member, but which unfortunately is all I can afford at the moment. 

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8 hours ago, jonpais said:

That and the mystery why I can no longer watch videos on YouTube in 4K with Safari. But I don't have a 4K monitor anyway. Correction: I know why, how long till Apple fixes it?

Apple knows what is good for you better than you do. They probably don't plan to fix it :)

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