Welcome to PhantomPilots.com

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

What is this wavy interference?

Discussion in 'Standard/4k Discussion' started by kirkdickinson, Oct 22, 2015.

Tags:
  1. kirkdickinson

    Joined:
    Oct 14, 2015
    Messages:
    26
    Likes Received:
    23
    Pretty new to Arial photography. Can anybody tell me what this wavy interference is and how I can prevent it?

    Here is a short clip from some footage:


    I have a Phantom III Pro, below are the specifics of the file created.

    General
    Complete name : G:\DJI Footage\20151021\DJI_0014.MP4
    Format : MPEG-4
    Format profile : JVT
    Codec ID : avc1
    File size : 3.92 GiB
    Duration : 9mn 21s
    Overall bit rate mode : Variable
    Overall bit rate : 59.9 Mbps
    Encoded date : UTC 2015-10-21 15:48:55
    Tagged date : UTC 2015-10-21 15:48:55
    Comment : 0.9.138
    ©xyz : +40.043571-81.179363+0.000
    ©xsp : +0.00
    ©ysp : +0.00
    ©zsp : +0.00
    ©fpt : -2.90
    ©fyw : -65.80
    ©frl : +1.50
    ©gpt : +0.00
    ©gyw : -65.60
    ©grl : +0.00

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L5.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 1 frame
    Format settings, GOP : M=1, N=8
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 9mn 21s
    Bit rate mode : Variable
    Bit rate : 60.0 Mbps
    Width : 4 096 pixels
    Height : 2 160 pixels
    Display aspect ratio : 1.896
    Frame rate mode : Constant
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.283
    Stream size : 3.92 GiB (100%)
    Title : DJI.AVC
    Language : English
    Encoded date : UTC 2015-10-21 15:48:55
    Tagged date : UTC 2015-10-21 15:48:55
    Color range : Limited
    Color primaries : BT.709
    Transfer characteristics : BT.709
    Matrix coefficients : BT.709
     
  2. LuvMyTJ

    LuvMyTJ ADMINISTRATOR
    Staff Member

    Joined:
    Feb 9, 2014
    Messages:
    6,811
    Likes Received:
    4,374
    Location:
    Live! From New York!
    The props are causing shadows from the sun on the video sensor. A small hood will fix this. Lots of stuff on the forum about it. Some like to use ND filters too, but a shade will fix it.

    Here are a few links from a search here...

    Light and dark banding on video in shaded areas | DJI Phantom Forum

    Lines in GoPro footage | DJI Phantom Forum

    Banding in video | DJI Phantom Forum

    Lens protector (and lens hood) for gopro with this gimbal? | DJI Phantom Forum

    Horizontal lines in video | DJI Phantom Forum

    Horizontal Banding in Still Photos | DJI Phantom Forum
     
    dirkclod likes this.
  3. kirkdickinson

    Joined:
    Oct 14, 2015
    Messages:
    26
    Likes Received:
    23
    Thanks,

    I just didn't know what the cause or termonology was so didn't even know what to search for. I have seen the filters and the hoods. I think I will order a hood. Not sure about the filter though?

    I have heard about Jello effect, but I didn't think this was it.

    Thanks,

    Kirk
     
  4. LuvMyTJ

    LuvMyTJ ADMINISTRATOR
    Staff Member

    Joined:
    Feb 9, 2014
    Messages:
    6,811
    Likes Received:
    4,374
    Location:
    Live! From New York!
    #4 LuvMyTJ, Oct 22, 2015
    Last edited: Oct 22, 2015
    dirkclod likes this.
  5. kirkdickinson

    Joined:
    Oct 14, 2015
    Messages:
    26
    Likes Received:
    23
    Thanks. I have ordered one from Ebay and a ND filter that is adjustable. I will print that until the paid one comes.

    Thanks,

    Kirk
     
  6. LuvMyTJ

    LuvMyTJ ADMINISTRATOR
    Staff Member

    Joined:
    Feb 9, 2014
    Messages:
    6,811
    Likes Received:
    4,374
    Location:
    Live! From New York!
    Keep in mind, putting additional weight on the camera is not recommended.
    I suggest you add counter balance so you don't cause undo stress on the gimbal motors. I used stick on wheel weights.
     
  7. badbeerbreath

    Joined:
    Jul 17, 2015
    Messages:
    99
    Likes Received:
    16
    I tried a lens hood but it would touch the ground surface when powering up. I could push it in a bit further so as it wouldn't touch the ground, but then it didn't extend past the lens to do any good. Any way around this or what's everyone doing about that??