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Thread: Panasonic GH4 Grain

  1. #11
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    Re: Panasonic GH4 Grain

    Quote Originally Posted by Jelle555 View Post
    If you mean by Original source media, i havent add any effect. then Yes. it's raw footage.
    What I meant was, were the files you uploaded straight from the camera, as opposed to running them through an NLE program? According to Mediainfo it would appear they were, EDIT: but they are 24p and it appears the whine bottle pour is in slow motion (Please disregard you are probably using the Variable Frame Rate).

    Question: What editing (NLE) program to you use?


    Quote Originally Posted by Jelle555 View Post
    but that is probably the fault of dropbox
    If you are viewing with the Dropbox viewer, yes there would be a difference, however if you download the file it is exactly as I uploaded it.

    Quote Originally Posted by Jelle555 View Post
    When I take a look at your footage I almost don't see any noise actually. practically nothing.
    The file I uploaded, of course is your file, run quick and dirty through Vegas Pro 13, with these slight adjustments......Brightness/Contrast adjustment, Color Saturation and Gamma adjustment, Mercalli V4 Stabilization, and a touch of a Sharpening Filter, then render through a FrameServer with Handbrake.

    The grain/noise level in all the test I have made are less than those you cannot detect in the sample I provided. So, I'm wondering if there is something else we are referring to.

    If you are interested in taking the time to make a couple test, I would be interested in the results and your opinion of the results.....

    1st test, set your GH4 up as follows:

    System Frequency: 59.94 Hz (NTSC)
    Photo style: Natural
    Rec Format: MOV
    Rec Qual: FHD ALL-I 200M 24P
    Exposure Mode: P
    iDynamic: off
    iResolution: off
    Master Pedestal lvl: 0
    Luminance lvl: 16-235
    ISO: Auto


    2nd test, change these settings:

    System Frequency: 50.00 Hz (PAL)
    Rec Qual: FHD ALL-I 200M 25P


    Very short test clips (5 seconds) should be plenty, as what will be most revealing is the comparison of a single frame from each compared to your sample files.


    I uploaded two files, if you would like to download them and compare to those your camera will produce. Both samples were shot with an Olympus M.Zuiko 12-40 mm F2.8 lens set at 17mm.


    https://www.dropbox.com/s/sqqtz4u2uq...00222.MOV?dl=0
    Settings for this sample:
    System Frequency: 50.00 Hz (PAL)
    Photo style: Natural
    Rec Format: MOV
    Rec Qual: FHD ALL-I 200M 25P
    Exposure Mode: A
    iDynamic: off
    iResolution: off
    Master Pedestal lvl: 0
    Luminance lvl: 16-235
    ISO: Auto
    IRIS: f2.8


    https://www.dropbox.com/s/kt602nw10u...00223.MOV?dl=0
    Settings for this sample:
    System Frequency: 50.00 Hz (PAL)
    Photo style: Natural
    Rec Format: MOV
    Rec Qual: 4K 100M 25P
    Exposure Mode: A
    iDynamic: off
    iResolution: off
    Master Pedestal lvl: 0
    Luminance lvl: 16-235
    ISO: Auto
    IRIS: f4.5

    Hope some of this is of some help...


    Best Regards.......George
    Last edited by Eagle Six; 27th November 2016 at 10:07 PM. Reason: Note about the Slow Motion

  2. #12
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    Re: Panasonic GH4 Grain

    Dear George,

    You were right, when I watched the clip in dropbox, I coulnd't really find any noise. As soon as I downloaded the clip and watched it the noise was back.

    I did the tests exactly as you said.

    Test1:
    https://we.tl/xfg9WVdJUK

    Test2:
    https://we.tl/10PF68lAdp

    I just notice an awful lot of noise in the black bull head. And this when recording in a room with plenty of daylight.

    When i take a look at your clips I most certainly see a lot less noise. There is some, but its way less than my GH4. Also noticed that your 4K clip has less noise than the FHD clip you recorded.

    Thanks!

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