Re: 360 spherical videos using 4 (or 5) vertical APS-C cameras
- 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
> a way to get complete synchro with the five go pro ?
> 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