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Can't seem to record at 1080i at 60fps

Discussion in 'Phantom 2 Vision + Discussion' started by TheChief, Sep 26, 2014.

  1. TheChief

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    Usually I record 1080p at 30fps. Today I wanted to try the 1080i at 60fps. I set the dial to that setting, recorded some footage, but after I pulled the files off the card, it off it shows the video is still at 30fps. 720p at 60fps works fine, shows up as 60. Is this something to do with the "i" in 1080i ?

    Any help is appreciated, thanks!
     
  2. SpikeFinch

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    Yeah, 1080i 60 reports as 30 fps on many systems. Interlaced is kind of a odd kid that way.

    How did it look in your video editing app? you should be able to get to around 30% speed and still look good.
     
  3. TheChief

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    I took two clips. One I set the camera for 1080i @ 60fps and one for 720p @ 60fps. I put both into Premiere, checked each files properties, the 1080i is still 30fps. The 720p shot is definitely 60fps, you can feel the smoothness. Is there something i'm missing? I'm recording on a SanDisk extreme 32gb, I set the setting in the Vision App, record, but it won't seems to do it!
     
  4. rrmccabe

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    Vision plus 1080-60?

    Unless I missed something the V+ is a 1080-30fps camera.
     
  5. TheChief

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    It does 1080p at 30fps or 1080i at 60fps. Well it's supposed too. It has the setting in the app, plus it's listed in the camera spec.
     
  6. Luap

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    1080 i is i for interleaced = half frames - thats a half frame, once top then bottom is played every 1/60th sec. If you play back on a reasonable sized monitor you'll see a combing effect. To removed it you deinterlace the footage either in realtime using programs like VLC or in editing software.

    In effect its close to 1080P 30fps but slightly more blurred.
    I use it sometime as it is less prone to jello than 1080P 30fps.
     
  7. SpikeFinch

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    "1080 i is i for interleaced = half frames - thats a half frame, once top then bottom is played every 1/60th sec.

    Every other line, not half frames. thus the name "Interlaced"
    ;)
     
  8. moviestar

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    Am I missing something? I only have the ability to record on my P3P in 1080p, no 1080i. I have a client who's specs are to shoot in 1080i, 23.98 drop frame
     
  9. Mako79

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    Your client either has no idea or been misfed info. I'm pretty sure your client wants 1080Progressive at 24fps. You DON'T want interlace and interlace will NOT work on 24fps. Interlace substitutes an empty horizontal line on every second horizontal line but it doubles the frames. So 1080i at 60fps means you will get 1920x540 lines on the first frame and then 1920x540 on the second frame. This why it has to be 60fps. Makes sense??
     
  10. len750

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    Ok, now I'm getting a headache, but I promise to try to get this learned.