Welcome to PhantomPilots.com

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

The reason I FPV @1440p30

Discussion in 'General Discussion' started by martcerv, Sep 6, 2013.

  1. martcerv

    Joined:
    May 27, 2013
    Messages:
    1,002
    Likes Received:
    2
    I use the hero3 black as my FPV cam and after a fair bit of use I have ended up pretty much sticking with 1440p30 as my FPV feed. Main reason is the extra vertical FOV so when flying more aggressive in ATTI or GPS modes I can still see above and below me. In the 16:9 modes even in the widest FOV settings this lack of vertical FOV makes it very hard to either set the camera at an angle where I can see ahead when pitched heavily nose down and also see below me when level.

    Also my vtx transmits in 4:3 SD and so the gopro is also outputting in 4:3 mode so if using a 16:9 video mode I get less veritcal image on the screen. I also have now set my screen to 4:3 input where I had it at 16:9 before, in 4:3 mode I dont use the full screen as it gets the black bars on the side but the image isnt squashed. Using 16:9 fills my screen but no matter what video mode it stretches the image horizontally to fill the screen. This makes it very hard to see altitude and seeing as I am shooting in 1440p30 this will fill the screen vertically anyway. Shooting in any 16:9 mode the output from the gopro is still in 4:3 so it gets black bars top and bottom which are filled with the gopro OSD but I am losing image space and if set to 16:9 in the monitor it also gets distorted making the altitude very hard to judge.

    Here is a screen grab of a video I shot with my 3d setup when accidently using 1440p30 on one cam and 2.7k30 on the other. The 1440p30 is full frame here in the background and the 2.7k30 scaled to match and shows the difference in FOV both vertical and horizontal.

    [​IMG]

    I think the image is cropped but here is a link to the full 1920x1440p jpeg
    http://imageshack.us/a/img38/6537/2v9g.jpg
     
  2. DeweyAXD

    Joined:
    May 31, 2013
    Messages:
    818
    Likes Received:
    9
    Location:
    Oxfordshire, UK
    Really good tip there and excellent way of demonstrating it. When I get my Hero3 back from GoPro I'll be giving that a try for sure. Do you record using that too or just for FPV flights? If so how do you find the jello compares to 60fps?
     
  3. martcerv

    Joined:
    May 27, 2013
    Messages:
    1,002
    Likes Received:
    2
    For general flying when using FPV I will record and fly with this mode but now that I have pretty much sorted my 2 cam setup I can easily fly in 2 modes at once. I hardly ever fly in 60p anyway and have tried to sort everything out to minimize jello, after a few crashes and trying the new 3d mount I got more Jello then I was getting on my first 3D test flights but I have changed one motor that was playing up a little and then balanced all 4 motors. I have also tightened up my DIY mount and did some test flights the last couple days that have got it smoother then I ever did before.

    Here is a little video I did a while back comparing all the modes, though its not all from the exact same location but it was all shot in a GPS hover using the evil GoPro WiFi to change modes while in the air.

    [youtube]http://www.youtube.com/watch?v=ztjLeJXNLd4[/youtube]

    I was flying in the 16:9 modes and was really struggling to fly in wind where high pitch angles are needed or when doing some more acrobatic manual mode flying.