Comments for The Machine in Shaft Ten

Comment on A High-Resolution IP Webcam by johnarthur

johnarthur — Mon, 02 Nov 2009 08:02:17 +0000

I’m afraid I haven’t used Unslung, so I can’t comment with much authority, but the process of replacing it with the OpenWRT firmware should be identical to replacing the original firmware.

Comment on A High-Resolution IP Webcam by Chris

Chris — Sun, 01 Nov 2009 04:46:25 +0000

Thank you for this great information. I’m looking to purchase a webcam and I was considering the one you mentioned here. I have a nslu2 w/ the unslung firmware installed. do i have to do anything different?

thanks

chris

Comment on A High-Resolution IP Webcam by volpoca

volpoca — Sun, 18 Oct 2009 15:22:36 +0000

In /etc/config/network I added:

option gateway 192.168.0.1
option dns 192.168.0.1

and now all works fine.

Thank you again,
Gianpaolo

Comment on A High-Resolution IP Webcam by johnarthur

johnarthur — Wed, 07 Oct 2009 07:35:12 +0000

If you can see it locally its working correctly; your problem must be a firewall or DNS name lookup issue. You should look at the error message you get when you try to access it via the internet – does it claim that the address doesn’t exist (name lookup problems) or that it can’t find a server there (firewall problems).

Comment on A High-Resolution IP Webcam by volpoca

volpoca — Wed, 07 Oct 2009 07:25:49 +0000

Hi,
I have installed the image “openwrt-nslu2-uvc-webcam2.bin”,
switched to static IP and modified etc/init.d/done (#One camera; run one web page) as follow:

-o “output_http.so -p 9998 -w /webcam_www”\

I can now access the NSLU2 locally with Firefox (http://192.168.0.11:9998)
but access via internet (http://example.no-ip.org:9998) is not possible.
A Linksys wvc54gca ip camera with the same configuration work without problems.

Can you help me?

Thank you and best regards,
Gianpaolo

Comment on A High-Resolution IP Webcam by johnarthur

johnarthur — Fri, 26 Jun 2009 21:50:23 +0000

I’m afraid I haven’t looked at this, so I can’t offer anything helpful. I strongly suspect you will need to do it at the host end as the NSLU2 does not have the computational power or time spare to manipulate the JPEGs, even to do something as apparently simple as image inversion.

Comment on A High-Resolution IP Webcam by Rico

Rico — Thu, 25 Jun 2009 16:25:53 +0000

Hi johnarthur,
I wonder if you can give me a bit advice on where I can find information about flipping the output of mjpg_streamer. I need to flip the output image/video because the webcam will be mounted on the ceiling which makes the images upside down. I am thinking (actually working on) about flipping the output stream real time with Javascript but then I will have two new problems:
1. Flipping image(s) with js might take up significent computing power on the client machine.
2. I still need to flip the snapshot or video stream if I need to save to record them.

Therefore I think the ideal solution would be to find a way to flip the image(s) before sending through http output.

Regards,
Rico

Comment on An Efficient Voltage Regulator by Lurch

Lurch — Fri, 08 May 2009 10:41:14 +0000

For those of us without the required skills to build one ourselves you can also get pre-built switching regulators – there’s a bunch of info and test results at:
http://sites.google.com/site/bifferboard/Home/howto/power-bifferboard-from-12vdc-battery

Comment on A Battery-powered Time-Lapse Camera by eclectronics.org » Blog Archive » Auto power management for the Angstrom NSLU2

Wed, 06 May 2009 11:06:08 +0000

[...] followed the instructions here and modded the NSLU2 to connect its RTC chip to its power-on circuit, it also necessitated patching [...]

Comment on Further notes on the NSLU2 and QuickCam Pro 9000 by johnarthur

johnarthur — Sat, 25 Apr 2009 02:24:48 +0000

The video stream from the NSLU2 is just video; the OpenWRT UVC driver doesn’t know how to get at the audio that the camera can generate. I’m afraid I can’t help with saving the video stream or using Cygwin as I haven’t tried to do either and I just don’t know whats involved. Both sound perfectly feasible to me…