[tech-3d] RE: Subject: shutter glasses / 3d video workstation

["Marcus Warrington" <marcusw@xxxxxxxxx>]

Hi Boris, Alan

I also have been "playing" around with Digital 3D video. I use a Pinnacle
DC10+ capture card (use MJPEG compression  and costs about 160 uk pounds..
probably about the same in dollars) on a Celeron 466 m/c with a 20gig
7200rpm
Maxtor DiamondMax drive. I've made a 9 gig partition for video capture and
editing,
although at around a gig for every 5-10 minutes its nowhere near enough. One
of the
biggest problems with PC based video is the silly 2gig limit on .avi file
sizes, if
you need more than this you need to do multiple captues (NT increases this
limit to
4 gig). Using a program like VirtualDub or AV_IO automates this process by
capturing to multiple .avi files as it needs to. Of course if you use an
expensive
capture card that uses hardware compression in MPEG2 format anyway then this
files size issue won't effect you. Only problem is that MPEG formats are
notoriously
difficult to edit as you don't have absolute control over where you can cut
(since you can only edit on an I frame, not a P or B)

I've edited (if needed) this captured Field-Sequential video (from a Nuview)
and
then encoded it in Mpeg2 format (MPEG 1 is no good because it doesn't
support
field interlacing), burnt to a CD and then played back on my standalone DVD
player.
Problem with sticking with interlace encoding is that it wont play back in
3D on my
PC (because the card/monitor don't have interlace modes).

Another thing is to convert the captured F-S video into over/under format
(using
Premier plugin) and then playback using my Wicked3D glasses (which have a
line
doubler) on the PC. This gives full screen, flicker free PC display, but no
good for
TV. problem with this approach is that in order for it to work (because of
timing issues)
Its very dependant upon the resolution used and the size of the black band
between
top and bottom images.

There is also a purpose built 3D video player available at

http://mysak.umbr.cas.cz/~husakm/Public/Win3dVideo/Win3dStereoscopicVideoPla
yer.htm

The same chap also has a very informative guide to making your own digital
stereo-video
movies in DVD quality for playing on computers at

http://staff.vscht.cz/~husakm/stereopcvideo.html


Merry Christmas

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