Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

  1. Krisz

    Joined:
    Jun 27, 2016
    Messages:
    9
    Likes Received:
    4
    Location:
    Hungary
    Dear Phantom 4 Users!


    The reason why I'm opening this thread is to find a solution or explanation for my problem. There are some similar threads in the forum but I have not find the answers yet.

    The background:

    For the first let me say that I'm not a photographer or a video expert I'm just a hobbist who is getting familiar with this amazing hobby. I'm using "auto" settings most of the time both in filming and in photo shooting. That's why I thought my "flickering/white pulsing on surface" problem cames from my auto settings.

    Here are the link for the videos which I'v filmed yesterday.

    Dropbox - Phantom 4 Flicker

    These are the "raw" videos directly from the SD card.

    In order to see the problem you have to download the footage and watch it on a FULL HD or 4K TV screen. (Unless you have a high-end monitor)

    I've watched all the clips on my average LG 27" IPS LED but it was hard to see the flickering/white pulsing surface in the video.

    I've also uploaded to youtube but becasue of the decoding or downgrading methodology of youtube it was also hard to see.

    The best way If you download it and watch it on the TV screen.

    What I see in almost all off my videos especially in very bright/ sunny conditions is a very strange pulsing/flickering light effect on roofs, land, water, trees, grass and on different kind of surfaces.

    I'm shoting at 1080p 50 frames.

    As I told at the beginning I've used manul settings till yesterday but after that I made some experimnet. It was also bright sunny day so the ISO was around 100 but the shutter speed was very high as far as I remeber around 640-800.

    I've changed the white balance to "sunny". I've tried different styles. I've reduced the stauration but nothing helped. Flickering and pulsing light effect all the time in my videos.

    My questions are the following:

    Can you see the flickering/pulsing light effects in my videos or should I buy a new tv? :) It's a 1,5 year old SAMSUNG U7000 series FULL HD.

    If you can see is there any solutions to get rid off this problem? Is a malfunctioning camera or this caused by the lack of ND filters? (it's on the way)

    Forgot to mention that after post/editing and watching full clips on my TV flickering still there.

    Please download and watch my videos on a TV screen and feel free to comment. Is it problem with my TV? :) Is it hardware issue or just wrong camera setting?

    Thank you very much for any kind of help or comment!

    P.S. The gimbal movements in my videos are made my me. I had to adjust the gimbal roll many times becuase It can not keep the horizon..(maybe it's another issue?)

    Regards,

    Krisz
     
  2. roemeister

    Joined:
    May 24, 2016
    Messages:
    36
    Likes Received:
    31
    Hi Krisz,

    I've downloaded and looked carefully at a couple of the videos (1st 2), and what I'm seeing — others may see it differently — is typical of the sharpness being set "too high" (I use quotes, because this is a matter of preference, not an absolute) and the resulting moire pattern in high-frequency patterns such as the grass or rooftops.

    I settled in on -1, -1, 0 for the custom Style settings that I prefer for most video, and 0,0,0 for most stills. Others use -2,-2,-1 or various other combinations. Search for phantom style settings and you'll find plenty of examples, but ultimately you'll want to experiment with your workflow and intended output to see what works best for you and your subject material.

    Have fun with the experimentation, and don't get frustrated. It's these subtleties that make the final difference between good and great video, so it's worth some effort if you want the results.

    Have fun flying and be sure to post some of your results when you can.

    Best wishes,

    Bobby
     
    Krisz likes this.
  3. Krisz

    Joined:
    Jun 27, 2016
    Messages:
    9
    Likes Received:
    4
    Location:
    Hungary
    Hi Bobby!

    Thank you for the quick response and suggestions. So it means I should not worry about that strange pulsing effect? Only thing(s) should I do is to modify on camera settings? I've already ordered an DJI ND8 filter (it's on its way) in order to try to lower the shutter speed in very bright conditions. Hopefully it will solve the problem. I'll do my best in case of experimenting. Thank you for your advice!

    Regards,
    Krisz
     
  4. roemeister

    Joined:
    May 24, 2016
    Messages:
    36
    Likes Received:
    31
    Hi Krisz,

    When you lower the sharpness setting, the super-fine details will no longer be as crisp, but in turn they will no longer cause the flickering or moire pattern (in most cases; it depends on the exact subject matter, pattern, settings, and so on).

    Something you'll see mentioned often as "pulsing" can result from high shutter speeds with video. To oversimplify, the goal is to use a shutter speed of 1/(twice your frame rate). I see from your profile page that you're in Hungary, which I believe uses PAL, so 25 frames per second is the "standard" frame rate. The goal is then to shoot with a shutter speed of 1/50th of a second. This is only possible on sunny days with a Phantom camera if you have an ND filter or maybe a polarizing filter, since the Phantom camera has a fixed aperture. You can search the forums or YouTube and find many explanations of this in more detail, but that's the basics.

    Until you get the ND filter, try flying on a cloudy day or just after sunset and with different sharpness settings and notice the moire pattern or "pulsing" will most likely be gone.

    Best,

    Bobby