#Video effect
7 messages in this thread
Help! Anybody got an idea on the following problem:
I need to swap live NTSC video, left for right mirror image, only
going to an NTSC monitor. That is, flip along an axis vertically through
the center of an image. This needs to be continuous live video, although a
slight lag of a couple of frames is probably ok, as long as 30 frames/sec.
is maintained. The image is a strict reversal, no need to rotate
The expensive way: ADO.
The easy way: a mirror.
The unlikely: a monitor that scans from right to left instead of left to
right.
The said-they-couldn't: Newtek Video Toaster
The possible: a video graphics board that can map the display area (flip
rows or columns) pretty strangely.
Any clues appreciated. Thanks.
God, I hate word problems. A video signal is travelling 100 mph from
Chicago to Baltimore…
Kevin Krell – Computer Support Associates
Jeez, Kevin… I'm shattered! I thought you knew EVERYTHING!!! <BIG GRIN>
Dave
Kevin,
You don't approach these word problems in the correct manner. You first
have to ask yourself just why a video signal would be going to Baltimore
from Chicago, let alone at 100 MPH. This is guaranteed to screw up any
possible answer you can achieve…………<grin>.
What is your final goal? A reversed video signal? An image on tape? A
background? Do you have to keep the signal "in the box" all the way, or
are you willing to have analog stages?
Ken Loss-Cutler
Ken,
I thought I did state the goal. The video image (to a monitor)
needs to be flipped left to right (axis is the vertical center of the
screen). Take a digitized single frame of 512×486 as an example:
everything stays on its own raster line, but pixel 1 of the input displays
@ position 512 of the output, and pixel 512 of the input displays @
position 1 of the output. Actually, analog is what I'm looking for. It
may be possible to capture incoming video, and flip it, and do this
continously ring buffer style, but I expect a definite lag, or the need to
skip frames to allow processing time.
Kevin Krell – Computer Support Associates
Is this a job for Video Toaster?
Ken Loss-Cutler