WebCam Help

On 2/22/07, Carlos GP <cbing0786gmail.com> wrote:
> Hi there!
>
>  I want to develope a program that uses the camera from
n800, but I'm
> working in my PC, not in the Table (the fact is that I
don't have it...)
>
>  Is there any way to use my webcam as the camera of the
n800? Emulate it, I
> mean...
Hi

The best thing would be to implement a program using v4l.
After somebody on irc sent this [1] video I started playing
with v4l
on my machine.
expect a mud  SDL_bgrab[2] package within days

greetings

[1] http://www
.youtube.com/watch?v=kNoTTXOyDjg
[2] ht
tp://www.ferzkopp.net/joomla/content/view/20/14/
_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

Yes, you can do all the development using your PC.

Just plug a WebCam to your PC and write your application.

Your webcam must have a v4l or v4l2 driver.

I recommend you to use GStreamer to develop your
application, it is easy 
an and powerful. And you will have to change just one line
of your 
source code to change from v4l to v4l2. If you don't use
GStreamer and 
develop directly for v4l you will have extra work to port
your 
application to v4l2. Lot of v4l2 driver are backwards
compatible with 
v4l standard but I'm not sure N800 camera driver is, and in
addition I 
recommend use v4l2 'cause v4l is already deprecated.

On N800 you can use the v4l2src plugin in the same way you
use on 
Desktop (v4l2src ! xvimagesink for example)

So, to summarize, write your app using GStreamer and v4l2src
plugin on 
Desktop and then just compile it on scratchbox for arm to
make it work 
for N800.

BR,
Edgard Lima
edgard.limaindt.org.br






ext Carlos GP escreveu:
> Hi there!
>
> I want to develope a program that uses the camera from
n800, but I'm 
> working in my PC, not in the Table (the fact is that I
don't have it...)
>
> Is there any way to use my webcam as the camera of the
n800? Emulate 
> it, I mean...
>
> Thanks a lot, and sorry for my English
> -- 
> Carlos GP
>
------------------------------------------------------------
------------
>
> _______________________________________________
> maemo-developers mailing list
> maemo-developersmaemo.org
> h
ttps://maemo.org/mailman/listinfo/maemo-developers
>   

_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

Hello Edgard

>
> On N800 you can use the v4l2src plugin in the same way
you use on
> Desktop (v4l2src ! xvimagesink for example)
What resolution can I expect from the web cam? Should I be
able to
access the /dev/video0 device as user?

Have you tested the v4l2src ! xvimagesink example on the
device?
Do you have hints onto how to get rid of the gtalk client
when poping
the device?


greetings
_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

yes, you can use /dev/video0 as user

you can use VGA (640x480), QVGA(320x240), QQVGA(160x120),
CIF(352x288), 
QCIF(176x144) and subQCIF(128x96) image sizes (about 
"resolution...hum...I don't know)

you can get from 10/1 to 30/1 fps

example:
gst-launch-0.10 -v v4l2src ! video/x-raw-yuv, width=128,
height=96, 
framerate=(fraction)25/1 ! xvimagesink

btw: always use xvimagesink instead of ximagesink 'cause
performance is 
much better

BR,
Edgard


ext Kees Jongenburger escreveu:
> Hello Edgard
>
>>
>> On N800 you can use the v4l2src plugin in the same
way you use on
>> Desktop (v4l2src ! xvimagesink for example)
> What resolution can I expect from the web cam? Should I
be able to
> access the /dev/video0 device as user?
>
> Have you tested the v4l2src ! xvimagesink example on
the device?
> Do you have hints onto how to get rid of the gtalk
client when poping
> the device?
>
>
> greetings

_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

On Thu Feb 22 15:53:19 2007, Kees Jongenburger wrote:
> Do you have hints onto how to get rid of the gtalk
client when 
> poping
> the device?

There's a gconf key, it's, erm, somewhere.

I stumbled across it when I was exploring with the
gconf-editor I 
found, erm, in a repository I had already.

I admit this is a strong contender for the world's least
helpful 
message.

Dave.
-- 
Dave Cridland - mailto:davecridland.net - xmpp:dwdjabber.org
  -
acap://acap.dave.cridland.net/byowner/user/dwd/bookmarks/
  - http://dave.cridland.net/
Infotrope Polymer - ACAP, IMAP, ESMTP, and Lemonade
_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

On Thursday 22 February 2007 15:17, Dave Cridland wrote:
> On Thu Feb 22 15:53:19 2007, Kees Jongenburger wrote:
> > Do you have hints onto how to get rid of the gtalk
client when
> > poping
> > the device?
>
Open the gtalk client, 
Choose Tools->Settings 
Uncheck 'Start when Camera opened
Press 'OK'
> There's a gconf key, it's, erm, somewhere.
>
> I stumbled across it when I was exploring with the
gconf-editor I
> found, erm, in a repository I had already.
>
> I admit this is a strong contender for the world's
least helpful
> message.
>
> Dave.
_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers

Hi,

Here is some more information
The webcam is v4l2 compatible, the SDL_bgrab I posted
earlier is v4l compatible.

p.s. is there a n700 gtalk client that supports video?

greetings

On 2/22/07, Brian Waite <linwoesgmail.com> wrote:
> On Thursday 22 February 2007 15:17, Dave Cridland
wrote:
> > On Thu Feb 22 15:53:19 2007, Kees Jongenburger
wrote:
> > > Do you have hints onto how to get rid of the
gtalk client when
> > > poping
> > > the device?
> >
> Open the gtalk client,
> Choose Tools->Settings
> Uncheck 'Start when Camera opened
> Press 'OK'
> > There's a gconf key, it's, erm, somewhere.
> >
> > I stumbled across it when I was exploring with the
gconf-editor I
> > found, erm, in a repository I had already.
> >
> > I admit this is a strong contender for the world's
least helpful
> > message.
> >
> > Dave.
> _______________________________________________
> maemo-developers mailing list
> maemo-developersmaemo.org
> h
ttps://maemo.org/mailman/listinfo/maemo-developers
>
_______________________________________________
maemo-developers mailing list
maemo-developersmaemo.org
h
ttps://maemo.org/mailman/listinfo/maemo-developers