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Thread: Atomos Ninja Flame + Lumix G7 --> very noisy footage

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    Atomos Ninja Flame + Lumix G7 --> very noisy footage

    Hello there, I have a Panasonic Lumix G7 and i just bought the Atomos Ninja Flame. Yesterday i made some test shots and they came out very noisy,..see picture Anybody got an idea why this could be? Or send me in the direction where i need to search to solve the problem? The G7 had following settings: ISO 640, aperture 3.5, shutter 50, white balance set manually , Picture style: Natural Contrast: -5 Sharpness: 0 Noise reduction: 0 Saturation -5 Camera was set to 4K uhd .mp4 - 25fps 100mbs The Atomos was set to Prores 422 Is there anybody who was had something like this? I can't really think that so much noise comes from a ISO from 640? Maybe my censor from the camera became to hot (i read online that this can also cause noise) And there is a good change that my camera was to hot cause it was sitting exactly under the main lamp (800watt) which lights the front of the character. Today i am going to make the same shot with a cold camera and see if that was the problem. Meanwhile i hope somebody on the forum can lead me in the right direction to solve the problem. Thanx in front greetz Lenny https://drive.google.com/open?id=0B8...mF5TGdtOXR6ZkE

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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    I can ask my contact at Panasonic in Japan if they can help but as there is a third party accessory they might not be able to. Let's see.

    Ian
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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    I have had a response and I need to ask you if the output from the camera is also noisy if you plug it into an external display directly?

    If you can private message me your email address, Panasonic may wish to disccuss the problem with you directly.

    Ian
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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    Another question - does video recorded to the camera conventionally look the same?

    Ian
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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    Quote Originally Posted by Ian View Post
    Another question - does video recorded to the camera conventionally look the same?

    Ian
    He Ian,
    Thanx so much for your help.

    I just made some test, i got screenshots from the comparence from the Blue channel and from the color channel:

    Cold camera is: when i made the shot with the camera 1 second after i had put all the lights on.

    Warm camera is: when the camera was on for an hour, warmed up, cause of the influence from one of my lights, which was very close to the camera.

    left.mp4-cold-camera-right-prores-warm-camera-blue-channel.jpg

    left-mp4-cold-camera-right-prores-warm-camera-color-channel.jpg
    MP4Internal / Prores 422 Atomos

    In the left you see the cold camera MP4 Internal. In the right you see the warm camera Prores 422 recorded with the Atomos.

    -------------------------------------------------------------------------------------------------------------------------

    Left-cold-camera-prores-right-cold-camera-mp4-blue channel.jpg

    left-cold-camera-prores-right-cold-camera-mp4-color-channel.jpg

    Prores 422 Atomos / MP4Internal

    In the left you see the cold camera Prores 422 recorded with the Atomos. In the right the cold camera MP4 internal.
    I forgot to put the main lights out in my DIY green screen room, when i filmed the cold-camera shot with the prores 422.
    Which is not so bad after all, cause you can see, that although it has more light coming then the internal mp4 shot. The prores 422
    still has loads more noise.
    ----------------------------------------------------------------------------------------------------------------------------

    left-cold-prores-right-warm-prores-400%-blue-channel.jpg

    Cold-camera-prores 422 / warm camera prores 422 they are both scaled up to 400%

    In the left you see the cold camera Prores 422 recorded with the Atomos. In the right you see the warm prores 422 recorded with the Atomos.
    Here i also forgot to put the main lights out in my DIY green screen room, when i filmed the cold-camera shot with the prores 422.
    You can see that although the lighting is differently the noise is not. As far as i can tell?!
    --------------------------------------------------------------------------------------------------------------------------

    So i think that i can conclude out of this, that the problem has nothing to do with a warm censor, but either with the HDMI output from the Lumix G7, or
    something with the Atomos, or something with the hdmi cable.

    Or maybe completely something else??

    Do you think i should buy a different HDMI cable?

    Thanx in front greetz Lenny

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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    I don't believe there are different 'quality' HDMI cables. It should really only work or not work.

    I am not an expert on video, to be frank, but if you are seeing better results from footage recorded in the camera conventionally I wonder if it's because Panasonic's video processing is simply very effective. The output from the camera's HDMI may not be processed so much, meaning residual noise. It well maybe optimised for TV display as well. Noise can be a good thing as it may aid the overall tonal quality after the footage is processed.

    I hope Panasonic can provide some useful feedback.

    Ian
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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    zupa-after-denoise-at-normal-scale.jpg
    zupa-after-denoised-150%inFusion-viewer.jpg

    These are the shots after i have denoised them with neatvideo. The medium shot is a zommed in version from the wideshot.

    As far as i can tell, this is not so bad.
    anybody got an opinion about the quality??
    thanx in front
    greetz lenny

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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    It would have been good to see the full frame not a cropped still, I think the quality could have been improved if the lighting was brighter so the iso and aperture could both be lowered. Enabling better depth of field (focus), and a better key. Also the subject seems too close to the back of the green screen.
    Cheers, Rob

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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    Quote Originally Posted by RobertD View Post
    It would have been good to see the full frame not a cropped still, I think the quality could have been improved if the lighting was brighter so the iso and aperture could both be lowered. Enabling better depth of field (focus), and a better key. Also the subject seems too close to the back of the green screen.
    Cheers, Rob
    He Rob Thanx for your reply,

    What kind of file/frame would you prefer to see? Here i got a link to my google drive with 1 .exr frame which is 18.6 mb big:

    https://drive.google.com/open?id=0B8...GRFcWx3bkp2bVk

    I am going to work on improving the lighting :-) My Aperture was on f 3.5 do you mean by lowering the aperture going down to F2.8 ? Or by going up to F4.0 ?

    I am also working on getting further away from the green screen. I am going to start filming vertical with the camera, which also allows me to get further away from the camera.

    Thanx in front
    greetz Lenny

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    Re: Atomos Ninja Flame + Lumix G7 --> very noisy footage

    Hi Lenny, Yes sorry I meant smaller aperture 4.0 or 5.6, if the lighting is better. And lower ISO will help with the noise. The subject being further away from the back of the green screen gets rid of some shadows.
    Good idea shooting vertical and getting the camera closer to the subject too!

    Cheers, Rob

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