[photo-3d] Re: projecting stereo movies

[Andrew Woods <A.Woods@xxxxxxxxxxxxxxxxxx>]

Oliver Dean <3d-image@xxxxxxxxxxxxxx> wrote:
> Andrew -- How difficult would it be for Greg to set up for using shutter
> glasses with page flipped stereo instead of interlaced
> (row-interleaved)?  I have had page flipped still images on my computer
> using WinSpex software with an 8 MB ATI card (RageII chip, but the last
> time I investigated, about 2 years ago, they had drivers for several of
> the popular boards). Once I saw page flipped images, where both the left
> and right eye images use a full, progressive scan,  I was never again
> satisfied with the coarse look of row-interleaved stereo. Is it possible
> to set up page flipping for video?

Page-flipped produces brighter and higher resolution images than interlaced/
row-interleaved.  For still images it works great - if you have the right
software and a compatible graphics card (systems are available).

BUT...  video playback on the PC using page-flipped stereo is a different
matter entirely.  You need much smarter video playback software - it has 
to decode the video stream and store the different left and right images
in separate video buffers (pages).  The decoding technique would be 
different depending upon whether the 3D images are stored as row-interleaved,
alternate frame or using MPEG's Multi-View-Profile (MVP).  The software
also has to know what to do if dropped frames occur.
Then you need to switch the video card into page-flipped mode.
In any case, I don't know of such a video playback software.

The advantage with row-interleaved video files is that you can use almost 
any playback software - assuming of course that the video has been encoded 
without compressing the row-interleaved 3D content out of existance.

Companies such as ISee3D and Dynamic Digital Depth have released or are
about to release plug-ins for common playback software to allow the 3D
display of specially encoded video files but these are proprietary formats
and I don't know whether they support page-flipped.

Cheers,
Andrew.

------------------------------------------------------------------------
Get paid for the stuff you know!
Get answers for the stuff you don’t. And get $10 to spend on the site!
http://click.egroups.com/1/2200/5/_/160438/_/955675182/
------------------------------------------------------------------------