[Etoys] Camera (was Re: [Trac #175] Squeak/Etoys needs packaging)

[Jim Gettys]

May need some updating; Jon Corbet implemented the V4Lv2 interface (the
newer driver interface for Linux).  At this date, implementing the older
driver interface was clearly a mistake.

I don't know how different V1 is from v2.

                                      - Jim



On Sat, 2006-10-21 at 11:48 +0200, Diego Gomez Deck wrote:
> Hi Folks,
> 
> I already hacked a webcam support for Squeak at Linux, it's named
> "Video4Squeak".
> 
>         http://minnow.cc.gatech.edu/squeak/3765
> 
> It uses Video4Linux, so I think is posible to run it in OLPC.
> 
> The camera also support some toys programming features. I also got
> working the Intel(Play) USB Microscope (except for the ligth, the linux
> module seems to be broken).
> 
> In the screenshot you can see 2 webcams (in fact is one plain webcam and
> the Intel microscope) capturing at the very same time.
> 
> My work assumes the morph will survive the camera disponibility (you can
> move the squeak image or a .pr to another machine without camera, or if
> you connect more than one camera the order in USB stack can be different
> in different boot-processing, etc) and it makes a good job trying to
> reconnect.
> 
> In etoys vocabulary, you can find a "lastFrame" property.  This property
> answer a SketchMorph that you can embed into a container and create an
> animation. I used to create a project where one (etoys) script capture a
> frame between time and time (normally 30 seconds) and put the frame into
> a container. Another script just plays an animation (using the captured
> frames) and instantly you have an accelerated-video (this type of videos
> where a flower grows really fast, etc).
> 
> The plugin interface is relatively simple, so it's quiet posible to get
> (the plugin) working in Windoze.
> 
> Attached is an screenshot showing the complete etoys-vocabulary.
> 
> Let me know if this helps.
> 
> Cheers,
> 
> -- Diego
> 
> > Am 20.10.2006 um 21:38 schrieb Zarro Boogs per Child:
> > > Comment (by jg):
> > >
> > >  Really cool.
> > >
> > >  Does Etoys/squeak have support for cameras?  We got that running  
> > > today...
> > 
> > 
> > Well, there is "VideoFlow", which looks interesting, but requires a  
> > plugin that might not have been ported to Linux yet:
> > 
> >       http://minnow.cc.gatech.edu/squeak/2411
> > 
> > And I just received some old bits from Tim Rowledge which once
> formed  
> > a Video4Linux plugin.
> > 
> > How would I access the camera? And until I get a b-test, could this  
> > be simulated by a USB camera?
> > 
> > - Bert -
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-- 
Jim Gettys
One Laptop Per Child