PanoTools mailing list archive
|Sender:||Fernando Costa Pinto|
|Date/Time:||20-Mar-2012 23:57:05 +0000|
|Subject:||Re: 360 spherical videos using 4 (or 5) vertical APS-C cameras|
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 <#removed#> 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
> 2012/1/16 Giorgio Marchetto <#removed#>
>> 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:
>> 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
>> 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.