vidnit and videffects

vid and videffects and vidnit were my first introduction to writing video code. I wrote some realtime effects which act on a video4linux source and played around alot. All of the effects work on 24-bit R'G'B' data and as such are awfully slow and unoptimal for video input, but hey, I was just starting.

I did a few interesting effects. I stole some ideas from the gimp, and I modified an emboss algorithm from an app called metgrab. The latest work that I did can likely be found in this tarball:

vid-0.1.11.tar.gz

The videffects app has some more of the raw code for doing effects, and I also took the time to learn the libavifile and smpeg APIs. Again, since all of these effects act on R'G'B' input, they're slow, and all operations are done without converting from gamma corrected space. Still, using the effects on live video input is sooo much fun.

Effects that I wrote were:

delay, a simple motion-blurr effect with configurable gain and feedback.
half-mirror, which mirrors one half of the input onto the other half of the screen. this leads to hours of enjoyment making crazy funny faces and stuff.
quarter-mirror, kaleidescope effect.
invert, a color-inverter. photo-negative effect.
colourmod, a de-colourizer. maps the image onto a smaller colour palette. makes it look like the silly 80s effects.
diffwatch, shows the difference between the current frame and the previous one. looks cool.

I also coded some simple bluescreen (chroma-keying) effects, but it is very difficult to get it to work with my camera due to the large amount of noise. you have to set the distance way too high.

videffects-0.3.tar.gz
videffects-0.2.tar.gz
videffects.tar.gz

vidnit is a simple linux video player. it can also do all of the videffects stuff, but i've re-written the buffering so its much more efficient. I was working on a GTK+ gui and trying to get this working, but it didn't go anywhere, and alot of my ideas were just plain bad.

vidnit-0.10.tar.gz
vidnit-0.7.tar.gz

For more recent video code by me, check My Graphics Page.

Name Last modified Size Description

[DIR] Parent Directory -

[TXT] HEADER.html 01-Nov-2001 17:34 2.5K

[ ] vid-0.1.11.tar.gz 25-Feb-2001 20:23 18K

[ ] videffects-0.2.tar.gz 10-Jan-2001 16:19 12K

[ ] videffects-0.3.tar.gz 10-Jan-2001 16:19 12K

[ ] videffects.tar.gz 10-Jan-2001 16:19 9.8K

[ ] vidnit-0.7.tar.gz 10-Jan-2001 16:19 9.7K

[ ] vidnit-0.10.tar.gz 10-Jan-2001 16:24 267K

Name	Last modified	Size	Description

Parent Directory		-
HEADER.html	01-Nov-2001 17:34	2.5K
vid-0.1.11.tar.gz	25-Feb-2001 20:23	18K
videffects-0.2.tar.gz	10-Jan-2001 16:19	12K
videffects-0.3.tar.gz	10-Jan-2001 16:19	12K
videffects.tar.gz	10-Jan-2001 16:19	9.8K
vidnit-0.7.tar.gz	10-Jan-2001 16:19	9.7K
vidnit-0.10.tar.gz	10-Jan-2001 16:24	267K

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