Welcome to PhantomPilots.com

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

Grainy Vids when Turning

Discussion in 'Pro/Adv Discussion' started by stealthbomber, Nov 1, 2015.

  1. stealthbomber

    Joined:
    Oct 2, 2015
    Messages:
    224
    Likes Received:
    82
    Is it normal for the video be grainy when making a quick turn? I upload my vids to YouTube and anytime I've made a quick turn the video gets really grainy. Seems the camera can't keep up. I've heard the p3p's camera has a slow bit rate along with a few other problems making it a mediocre camera.
     
  2. 4wd

    4wd

    Joined:
    Mar 31, 2014
    Messages:
    2,532
    Likes Received:
    421
    Location:
    North York Moors
    It seems to do a sort of jerking effect, and sometimes you get a line break halfway down the screen.
    Not sure about 'grainy' - are you actually seeing pixellation squares on youtube?
    That's a compression artefact from youtube trying to reduce file size.
    It's hardly noticeable in slow steady movement but a sudden turn will upset things.
    Try to turn slowly and smoothly, or edit out the rapid turns - they are pretty hard on the viewer at best of times.
     
  3. flyNfrank

    Joined:
    Feb 1, 2014
    Messages:
    4,214
    Likes Received:
    910
    Location:
    Indy, USA
    From my own experience, you may have an issue in the camera's flat ribbon cable. I had some interference showing up one day that I have never seen before. After spending a great deal of time looking at and in all the wrong areas, I finally figured out where it was located. And better yet it was something I could more then likely fix on my own. To make a long story short, the ribbon cable responded to movement by lightly pressing on it in different points. I ended up replacing it and the short 6-wire harness on top plate above camera and gimbal. I used only dji parts which there are a bunch of less costing options to be found on ebay.

    While recording video try touching the ribbon at each connection. My problem was the connection inside the top plate. Move the wire harnesses also. And then upload and watch the video back on your pc to see if there is ANY noticeable changes in the video. If there is, you now know where to fix the problem.
     
  4. Mako79

    Joined:
    May 16, 2014
    Messages:
    3,410
    Likes Received:
    567
    Location:
    Sydney Australia
    Youtube compresses heaps and this causes frame loss and artefacts.

    Are you recording in 4k@30fps?
    Try 1080p@60fps and make sure you upload at 60fps.
    The more fps = less tearing when tilting and panning.
     
  5. Zee

    Zee

    Joined:
    Oct 8, 2015
    Messages:
    13
    Likes Received:
    2
    I observed on other videos that when they are making a yaw, even a fast one, still smooth. On mine, making a yaw is a little bit jittery or i don't know what's the right term to that.

    when the phantom is moving forward, backward, downwards, upwards, I get a very smooth video, but as soon as I make a yaw turn or sideways even if it's slowly (adjusted gain), the video quality is a bit jittery or not smooth.it's like recording is not keeping up on sidewards and yaw..

    my settings is 2.7k on 20fps. Im about to try other settings tomorrow and see if it improves, im gonna try the 1080p on 60fps.

    Im using P3A.
     
  6. rowdyjim

    Joined:
    Jul 26, 2015
    Messages:
    20
    Likes Received:
    6
    Location:
    Queensland
    I have only just started using filters but from what i understand its best to try and have your shutter speed at least twice as much as your fps. So for 20fps you would set the shutter speed to 1/40. I have only had a chance to try this once so far with 1080p 60fps with shutter speed at 120. Video looks less choppy and has a smooth natural blur. I am only new to the manual settings and just starting to learn/understand it all. So far its looking heaps better. Filter were from phantomfilters.com. I think im heading in the right direction
     
  7. stealthbomber

    Joined:
    Oct 2, 2015
    Messages:
    224
    Likes Received:
    82
    I record in 4K@30fps. Record in 1080p?? Isn't that what the P3A is for? YouTube has the ability to now play in stunning 4K. I don't think the birds camera is what I was hoping and dreaming it would be! The uploaded videos from my iPhone 6 are way clearer and better quality than the birds 4K camera!?!
     
  8. 2nd2non

    Joined:
    Jan 14, 2015
    Messages:
    794
    Likes Received:
    207
    Location:
    Orange County, California
    I've seen this same issue on fast turns mainly in low light situations. Looks 'ok' on my computer, but grainy on YouTube. I say 'ok' as there is motion blur due to shutter speed. Seems the compression issues show up easier in these cases. Several comments on the net about it and not limited to phantom3.
     
  9. SteveMann

    Joined:
    Aug 27, 2014
    Messages:
    1,977
    Likes Received:
    653
    Location:
    Westford, MA
    Post a video.
     
  10. 2nd2non

    Joined:
    Jan 14, 2015
    Messages:
    794
    Likes Received:
    207
    Location:
    Orange County, California
    Here is one of mine
     
  11. SteveMann

    Joined:
    Aug 27, 2014
    Messages:
    1,977
    Likes Received:
    653
    Location:
    Westford, MA
    I meant for the OP to show what he is calling "grain".