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Re: 360 spherical videos using 4 (or 5) vertical APS-C cameras

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  • prague
    that thing is made of $2 of parts.
    Message 1 of 13 , Mar 23, 2012
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      that thing is made of $2 of parts.


      --- In PanoToolsNG@yahoogroups.com, Fernando Costa Pinto <fcp.fernando@...> wrote:
      >
      > Hi there ,
      >
      > I am looking for a solution in video 360, using 5 Gopro.
      >
      > Isn't this solution
      > http://photoshipone.com/shop/index.php?main_page=product_info&cPath=40&products_id=221
      > a way to get complete synchro with the five go pro ?
      >
      > rgds
      > Fernando
      > Salvador
      > Bahia
      >
      > On Sun, Feb 19, 2012 at 7:35 PM, luca vascon <luca.vascon@...> wrote:
      >
      > > **
      > >
      > >
      > > Giorgio, here I am.
      > > NO WAY to get proper complete synchro. Only solution to that would be a
      > > real genlock (wikipedia will help you, this is a pro-video term)
      > > Only thru hardware hack you can get something close to a contemporary
      > > shutter press..
      > > I'm afraid that the closest you can get the cameras you will have a lot of
      > > parallax errors.
      > > You will need, in the end, 5 cameras at least.
      > > Buy a ladybug and stay happy.
      > >
      > > Gopro is a nice thing, and when I'll have my hack done it will allow a lot
      > > of things, frame by frame stitching.
      > >
      > > I don't know your project but KEEP in mind the audio part is always
      > > ESSENTIAL!
      > > ;-)
      > >
      > > 2012/1/16 Giorgio Marchetto <mail@...>
      > >
      > >> Hello panofriends
      > >>
      > >> I would like to create 360 spherical videos using 4 (or 5) vertical
      > >> APS-C cameras.
      > >> For example: Nikon D5100, Sony Nex5N. Expect 3800x1900 pixel frame size
      > >> I have already used this technique to create Spherical (image) panoramas
      > >> with my Nikon D300 and Sigma 8mm fisheye lens (tilted +5°)
      > >> With 3:2 ratio (image) size horizontal width is larger than 16:9
      > >> (video), so there could not be enough overlap to stitch the frames with
      > >> only 4 cameras.
      > >>
      > >> I need to solve the following issues:
      > >> RECORDING
      > >> 1) how to link recording start/stop on all cameras?
      > >> 2) how to link (=have the same) exposures?
      > >> There could be more ways to set dinamically the exposures:
      > >> a) an exposure 'master' camera which controls all the other 'slave'
      > >> cameras (which uses the same exposures): Ladybug cameras should work in
      > >> this way.
      > >> b) an average exposure value calculation, to apply simultaneously to
      > >> all camera. How to do this?
      > >> c) dinamically select the shortest exposure and apply to all cameras
      > >> (I prefer, in post production, correct under-exposed images). How to do
      > >> this?
      > >> POST PROCUCTION
      > >> 3) How to automate the post production workflow?
      > >> I should prefer avoid frame by frame workflow (time consuming issue:
      > >> In 25 fps video, there are 1500 frames/min, 90K frames/hour......)
      > >> The frame-by-frame workflow: convert videos to frames, stitch and
      > >> correct frame by frame panorama, convert frame by frame panoramas to
      > >> video panorama.
      > >>
      > >> thanks in advance for sharing your expriences!
      > >>
      > >> Giorgio Marchetto
      > >> Web & Multimedia Developer
      > >>
      > >>
      > >> ------------------------------------
      > >>
      > >> --
      > >>
      > >>
      > >>
      > >>
      > >
      > >
      > > --
      > > Luca Vascon.
      > >
      > > www.nuovostudio.it
      > > www.officinepanottiche.com
      > >
      > >
      > >
      >
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