Announcement

Collapse
No announcement yet.

Panasonic GH4 Grain

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Panasonic GH4 Grain

    Hello everyone,

    I bought my GH4 about 4 months ago. When I first started recording I didn't notice a lot of grain. It was later when I started using the camera more.
    I noticed that my GH4 produced a lot of grain in the video.
    Even when I record outside in the bright daylight, I've got grain in my video.

    Also noticed that the grain level doesn't really change when I use different ISO levels. When my ISO is 400 I've got the same amount of grain than when my ISO is 1600. I find this really strange and nobody was able to help me.

    I hope somebody can help me out! Appreciate it!

    (LENS) Panasonic MFT 14-140mm F/3.5-5.6 )

  • #2
    Re: Panasonic GH4 Grain

    It sounds like you might have an effects mode or custom function enabled somehow. It might be a good idea to reset the camera and reconfigure from scratch.

    Ian
    Founder/editor
    Four Thirds User (http://fourthirds-user.com)
    Digital Photography Now (http://dpnow.com)
    Olympus UK E-System User Group (http://e-group.uk.net)
    Olympus camera, lens, and accessory hire (http://e-group.uk.net/hire)
    Twitter: www.twitter.com/ian_burley
    Flickr: www.flickr.com/photos/dpnow/
    Pinterest: www.pinterest.com/ianburley/

    Comment


    • #3
      Re: Panasonic GH4 Grain

      Thanks for the tip Ian!

      I tried it, but infortunately with no success.

      I'm planning to go to a camera store and ask for some information there.

      I tried everything from resetting the cam to sensor cleaning and all.

      Thanks anyway

      Comment


      • #4
        Re: Panasonic GH4 Grain

        Sorry I could not be of help. Unfortunately, it now sounds more like a hardware issue. Noise relates to heat and maybe the heat-sink on the sensor is no long doing its job properly.

        Best of luck! Please do let us know how things turn out!

        Ian
        Founder/editor
        Four Thirds User (http://fourthirds-user.com)
        Digital Photography Now (http://dpnow.com)
        Olympus UK E-System User Group (http://e-group.uk.net)
        Olympus camera, lens, and accessory hire (http://e-group.uk.net/hire)
        Twitter: www.twitter.com/ian_burley
        Flickr: www.flickr.com/photos/dpnow/
        Pinterest: www.pinterest.com/ianburley/

        Comment


        • #5
          Re: Panasonic GH4 Grain

          Thanks man! If it's true what you say it's really weird. Since its not even 4 months old. I will inform you

          Comment


          • #6
            Re: Panasonic GH4 Grain

            Originally posted by Jelle555 View Post
            Thanks man! If it's true what you say it's really weird. Since its not even 4 months old. I will inform you
            I hope that means it's under warranty

            Ian
            Founder/editor
            Four Thirds User (http://fourthirds-user.com)
            Digital Photography Now (http://dpnow.com)
            Olympus UK E-System User Group (http://e-group.uk.net)
            Olympus camera, lens, and accessory hire (http://e-group.uk.net/hire)
            Twitter: www.twitter.com/ian_burley
            Flickr: www.flickr.com/photos/dpnow/
            Pinterest: www.pinterest.com/ianburley/

            Comment


            • #7
              Re: Panasonic GH4 Grain

              Hi Jelle,

              Originally posted by Jelle555 View Post
              Also noticed that the grain level doesn't really change when I use different ISO levels. When my ISO is 400 I've got the same amount of grain than when my ISO is 1600. I find this really strange and nobody was able to help me.
              Unfortunately I'm not going to be able to help either. As you would expect, with my GH4, there is an increase in grain as I increase the ISO. Visually, not so much between close amounts such as ISO 400 and ISO 800, again as we would suspect, but comparing the same frame under the same lighting conditions and settings, there is a progressive increase in grain as I check from 200, 400, 800, 1600, 3200 and 6400.

              I have read there are GH4 users/owners who are not happy with the level of grain in comparison to other cameras they use. And, of course there are those who are not bothered, that's the camp I'm in. There should also be a difference in grain from the formats you are selecting and the between UHD and FHD.

              If you cannot detect a visual difference between ISO settings, can you detect a difference comparing samples using scopes? If there a difference in contrast, luminance, color saturation? If these all remain the same it would appear perhaps your camera has a malfunction and is stuck, but I would imagine you would detect this in the exposure as well.

              Are you in the position to upload a short sample to something like Dropbox, that we could download and take a look?

              Although I have never done it, if you reset the camera, I'm assuming all the settings were set back to factory defaults, eliminating any crazy settings we may have made along the way. But still, I would think no matter what custom settings you have made, you should still see a difference in the ISO.

              Best Regards.....George

              Comment


              • #8
                Re: Panasonic GH4 Grain

                Thanks George! That's a good idea.

                https://we.tl/9iMUNhfMS9 - Download Link for wetransfer

                These are 2 examples of footage I made. It may be me, but the noise levels in this video are extremely annoying. Especially the one with the bottle.

                Thanks for the tips!

                Comment


                • #9
                  Re: Panasonic GH4 Grain

                  Hi Jelle,

                  I downloaded the files, Thank You. I have a few questions if you don't mind....

                  1. Are these original source media from the camera, I think they are, please confirm.

                  2. Can you post all the settings you are using?

                  I would like to setup my GH4 and take some test shots to compare to yours. I think between your monitor, viewer, and eyes, there is a difference between my monitor, viewer, and eyes.....which isn't surprising, as we all see things a bit different. Although I have a two monitor setup, they aren't anything special. I expected to see something a lot worse than they appear to me.

                  Also, have you tried recording in 4k and compared the level of grain/noise to that of these 1080p samples? I uploaded a sample mp4 to dropbox. If you can download this file and point out the areas of the frame the noise is most annoying to you, such as foreground, background, dark areas, the whole thing?

                  https://www.dropbox.com/s/91m3yk45lw...90723.mp4?dl=0

                  Have you had an opportunity as yet to consult with your dealer or Panasonic? I'm still not being of much help, but interested in your issue and the possible resolution.

                  Best Regards......George

                  Comment


                  • #10
                    Re: Panasonic GH4 Grain

                    Hey George,

                    If you mean by Original source media, i havent add any effect. then Yes. it's raw footage.

                    My settings are:
                    Photo style: CineLike D
                    Rec Format: MP4
                    Rec Qual: FHD 1920x1080 50Mbps 24p
                    iDynamic: off
                    iResolution: off
                    Master Pedestal lvl: 0
                    Luminance lvl: 16-235
                    Iris: 3.5
                    Shutter 25
                    ISO: 400 (I think)

                    When I take a look at your footage I almost don't see any noise actually. practically nothing. I notice that the quality isn't perfect. (Doesn't look FHD) but that is probably the fault of dropbox.

                    I'm planning to see somebody in a camera store to ask for help.

                    I appreciate it man!

                    Comment


                    • #11
                      Re: Panasonic GH4 Grain

                      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?


                      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.

                      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, 10:07 PM. Reason: Note about the Slow Motion

                      Comment


                      • #12
                        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!

                        Comment

                        Working...
                        X