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-   Panasonic LUMIX S / G / GF / GH / GX Series (https://www.dvinfo.net/forum/panasonic-lumix-s-g-gf-gh-gx-series/)
-   -   "How Good Is The GH5?" (https://www.dvinfo.net/forum/panasonic-lumix-s-g-gf-gh-gx-series/533665-how-good-gh5.html)

Noa Put April 8th, 2017 02:07 PM
Re: "How Good Is The GH5?"
 
Can you show the problem by placing a video on vimeo or youtube?

Pete Cofrancesco April 8th, 2017 02:09 PM
Re: "How Good Is The GH5?"
 
Quote:
Originally Posted by Steven Schuldt (Post 1930385)

Well, I tried the 10bit 150 at 24p right out of the box in low light (bedroom/living room with compact fluorescent lamps). The artifacting was insane, so bad I thought the camera might be broken. I never even got to color grading, these were big square compression blocks appearing and disappearing all across the image straight after download off the memory card. I have fast U3 Kensington cards, and the camera never complained about write performance, so my assumption is one of two things:

- 10bit internal recording is sort of a joke. It's simply too much data for too little storage bandwidth, at least in this first firmware release.
- In low light, the 10bit compression utterly falls apart. Mind you, 8bit looked fine in the same low light, even at 60p.

So to actually shoot at 10bit with a GH5, I expect to do so over HDMI to something like an Atomos Ninja Inferno.

Otherwise, the camera is stellar and a big improvement over the GH4.
When they first released the specs I was sure that 10bit at that bitrate was false advertising. That's what I call selling cameras on specs.

So you say its a big improvement over the GH4. How so? Low light performance? Image quality?

Steven Schuldt April 8th, 2017 02:24 PM
Re: "How Good Is The GH5?"
 
2 Attachment(s)
Quote:
Originally Posted by Noa Put (Post 1930389)
Can you show the problem by placing a video on vimeo or youtube?
No, but I'm attaching grab of playback in FCP two frames showing the problem. Alas, the problem persists in well-lit daylight.

The first shows the issue (check the upper right of the image and note the block compression artifacts). The second shows the very next frame with no artifacts.

This is UHD 23.98 150Mbps 10bit. It may be that Apple does not yet understand what Panasonic is doing with its GH5 compression. The .MOV files are unplayable in Quicktime player, though they do import and play back in FCP.

Steven Schuldt April 8th, 2017 02:30 PM
Re: "How Good Is The GH5?"
 
Quote:
Originally Posted by Pete Cofrancesco (Post 1930390)
When they first released the specs I was sure that 10bit at that bitrate was false advertising. That's what I call selling cameras on specs.

So you say its a big improvement over the GH4. How so? Low light performance? Image quality?
Yes, low light is far better, though it was terrible/unusable with the GH4 and now borderline passable in a crunch. Not having a crop makes it feel less constricted and more cinematic with my lenses. The screen is great, the build and feel are top-shelf, I like having two cards, battery life still above average, stills just seem to have more life and pop and vividness than the drab stills from the GH4.

Mark Williams April 8th, 2017 02:31 PM
Re: "How Good Is The GH5?"
 
Quote:
Originally Posted by Steven Schuldt (Post 1930393)
No, but I'm attaching grab of playback in FCP two frames showing the problem. Alas, the problem persists in well-lit daylight.

The first shows the issue (check the upper right of the image and note the block compression artifacts). The second shows the very next frame with no artifacts.

.
That is nasty looking.

Steven Schuldt April 8th, 2017 02:42 PM
Re: "How Good Is The GH5?"
 
Yeah as I said, I didn't even bother with it when I took the camera on a casual shoot.

Looks like one of two things:

- 10bit on the GH5 is broken/garbage.
- Apple can't yet properly play back/understand 10bit .MOV files from the GH5.

Noa Put April 8th, 2017 03:36 PM
Re: "How Good Is The GH5?"
 
Have you heard more about these artifacts from other users? I did hear more about Apple users having issues with the GH5 10 bit codec though.

Steven Schuldt April 8th, 2017 04:56 PM
Re: "How Good Is The GH5?"
 
No, but I haven't looked around much. It's such a glaring problem that I'm having a hard time believing Panasonic shipped this feature. Did they think no one would notice all sorts of blocks and video-wrecking glitches?

This isn't pixel peeping after color grading. This is right out of the camera junk video.

If it's working for people on other NLEs then Apple needs to get on it.

Noa Put April 8th, 2017 05:10 PM
Re: "How Good Is The GH5?"
 
What you also could do is film a few seconds of footage where you see the artifacts and make the file that is on the card available for download for others to check or you can send it to me via wetransfer, if you want I can check it on my pc, I'm using edius, it would make clear if it's a camera or softwareproblem.

Steven Schuldt April 8th, 2017 06:07 PM
Re: "How Good Is The GH5?"
 
Yes, good idea, will try to do this tomorrow as I'm heading out for the evening.

Steve Burkett April 18th, 2017 05:39 AM
Re: "How Good Is The GH5?"
 
Quote:
Originally Posted by Dan Brockett (Post 1928349)
Wow, I bet the GH5 reps from Panasonic are not happy. I would never form an opinion off of one review and set of tests but the rubber meeting the road does not look positive in this review. Of course, some of this could be due to early glitches that Panasonic will fix with firmware updates?

Discuss.

https://www.cinema5d.com/panasonic-g...-free-gh5-lut/
And now the retraction from the same site.

https://www.cinema5d.com/panasonic-g...clarification/

Shows that you can't indeed form an opinion based on one review.

Ken Ross April 18th, 2017 01:42 PM
Re: "How Good Is The GH5?"
 
^ Yup. Unfortunately this camera has gotten some bad press because of shoddy testing on the part of some reviewers.


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