This took me a few minutes, but I figured it out, and archived it here so I wouldn’t need to spend that time again.
mplayer -cache 128 -tv driver=v4l:width=640:height=480:outfmt=i420 -vc rawi420 -vo xv tv://
It works.
Technorati Tags: My Projects, Webcam, Mplayer
Addendum: You can specify which video device by adding it to the tv options:
mplayer -cache 128 -tv [...]
It’s sometimes odd to think of the ways that the eddies and currents buffet you around while reading on the Internet. Frequently, you encounter odd bits that resonate with stuff you have seen before. On such current lead me to return to a topic which I’ve dabbled in from time to time: gravitational [...]
When I dropped into Tom’s office earlier today, he mentioned that he had found a copy of Albrecht Durer’s Of the Just Shaping of Letters available as a printable PDF. This version was scanned from the 1969 Dover reprint of the 1917 edition which is in the public domain. Cool! A bit [...]
I should have mentioned this before, but in case anyone didn’t know, there’s been a naked eye comet visible in the west as the sun is setting (at least, for people in the northern hemisphere), and for the last couple of nights, I’ve had binoculars out and let my fellow Pixarians have a glimpse at [...]
Another link stashed away for safe keeping:
A Paint-Brush Laser Range Scanner
It’s really quite clever in the way it uses a double frame to provide a reference coordinate system and allow for free motion of the camera and the laser.
Despite having done quite a bit of computer graphics over the years (even getting paid to do it), I haven’t really done much in the way of computer vision. I’m currently trying to work on a project for the upcoming Maker’s Faire that has something to do with computer vision (he says slyly, teasing [...]
Just thought I’d stash a reference to this paper on low cost motion capture. It uses two webcams to track the lower half of someone’s body. Just keeping this for inspiration in a related project.
Unfortunately, it won’t be available until the middle of the year, but Apple today announced the iPhone, which isn’t just a phone, but in fact a combination phone, iPod, and internet communication device. It really does seem amazing: the type of handheld convergence device that i was hoping for. It’s got:
It’s a [...]
During my visit last week, I scanned some of the family pictures, including this cute one of, well, me.
Honestly, how cute is this?
Well, after an extended vacation, today is my first day back at work. My desk is as messy as I remembered, and I’ve got a meeting in four minutes, and I have nearly two thousand emails to work through. Sigh.
I’ve lived in the Bay Area for almost sixteen years, but there are still many tourist-y things that I have never done. Often, it requires the intervention of guests to get you off your duff and go see the attractions which are right on your back door. Such was the case yesterday, when [...]
I was mucking around doing patent searches on Google, and came up with the following interestingly titled patent: Tactical nuclear slide rule.
A calculational aid is provided, in the form of a slide rule, to facilitate calculation of damages inflicted by a nuclear detonation. The particular apparatus permits calculation of the effects of an air blast, [...]
I upgraded this site to Wordpress 2.05. It seems to have gone smoothly, but as always, if you spot something amiss, bring it to my attention by sending email to my normal gmail account and I’ll try to get it resolved quickly.
Addendum: Back to my normal brainy theme. Say goodbye to Christmas.
Addendum2: Sigh, [...]
The Hough transform is a fairly standard computer vision algorithm for detecting lines (and with extensions, more general shapes) in images. I hadn’t thought about this since my undergraduate days over 20 years ago, but a program that I’m currently working on seemed like remembering how it would work would be helpful. A [...]
