FS5: Testing Cine4 noise at iso3200 on thin lines

olof

olof

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Shot using Cine4 Gamma iso 3200 UHD factory settings for detail.


This is on a HD timeline, but I blow it up first 200% then 400%.


Interesting is that viewed on my iMac screen I see all kinds of strange aliasing etc when played back full screen, but on my eval monitor SDI out it is very clean. I think maybe the problem some are seeing is how they are viewing it. You need to see it on on a Pro evaluation monitor. On my MBP I get some strange aliasing as well but I think that is the GPU coping badly with the 100mb/s UHD Long GOP.


Or maybe I got lucky with my FS5. Bottom line is I am not seeing anything terrible. Remember this is 4X HD in other words it is like a 420 8bit HD stream at 25mb/s how good can it possible be, something has to give. And I think of iso 3200 as pretty high iso. EX1 and EX3 cams are only good to about 1600 before getting noisy and the is at 35mb/s.


This is with the kit lens, no image stabilize and all the way wide, slightly out of focus.



 
iMac screens are notoriously noisy, so much noisier than my broadcast monitor. So your on the money that this could be the problem. Doug Jensen had problems replicating the aliasing etc and I'm sure he's not watching his footage back on an iMac screen.

Your footage looks OK to me and thats compressed for Vimeo.
 
Correct. I'm looking at the footage on a 17" Sony OLED broadcast monitor coming out of Premiere, Resolve, and the camera itself. Still no problems worth mentioning.
 
Unrelated to post process or monitoring guaranteed. For those having the issue it appears very clearly on every type of monitoring. Viewfinder, uncompressed HDMI, post, etc. It's a serious gitch with at least many FS5's out there and our process has nothing to do with it. 3200 iso, cine modes in perfectly reasonable filming situations.
 
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maxjw said:
Unrelated to post process of monitoring guaranteed. For those having the issue it appears very clearly on every type of monitoring. Viewfinder, uncompressed HDMI, post, etc. It's a serious gitch with at least many FS5's out there and our process has nothing to do with it. 3200 iso, cine modes in perfectly reasonable filming situations.
Click to expand...
Max,

Could you shoot something similar to what I shot. Use Cine4 and let us know what software you are using, I did no other tweaking in the camera settings, I used Pro color profile. I used FCPX and dropped it in a 1080 timeline, first 100%, then 200, then 400. And I did the auto compress and upload to Vimeo highest quality h.264 in FCPX share settings.

I did shoot it under exposed first then what I would consider about right. ISO 3200 no image stabilization. I used the kit lens at 18mm focus at 60' so it should be a bit out of focus. I did nothing in post other than change the scale.

This way we can find out if it is a specific camera problem, if it looks very different from mine. If your results are drastically different from mine you should contact Sony and have them check your camera. I encourage others who have this problem to do the same.
 
Thanks Olof. This was a test I shot when i first started noticing the issue. I'll do a test when I'm back from the holidays to match your setup.


Alex did another test that shows it clearly as well.

I have been in touch with a tech at Sony who is waiting for an answer from higher-ups. He says it's most likely not a compression issue.
 
The window blind video confuses me, if you are in a 4k time line and crop.. isn't the FCPX (or other NLE) going to resize back up back to 4k? dropping 1080 on a 4k time line doesn't get you 4k it gets you stretched 1080
Simple example in case I am not explaining myself well..... If shoot a still image at 6500 pixels wide crop the heck out if it then resize it back to 6500 thats going to get really bas as well, not really a good way of showing potential issues
To me the second video seems like a better example, but thank you guys for taking the time to post tests
 
No problem Ray, just looking to get Sony to address the issue. The tearing/lines showing up on the blinds are visible live on the camera monitor and are not from NLE interpolation. The artifacts aren't a result of cropping in. I've just cropped in to show a closer view of where the frame loses integrity. It's there the same in the uncropped 4k version of the shot. I can't stress this enough, it has nothing to do with types of monitoring, compression, NLE workflow.
 
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