How to begin v4l2 application development??

How to begin v4l2 application development??

[Bryan Nations]

I am new to video for linux and would like to know what resources are 
available to assist me in programming a simple webcam application with 
c++ in a *nix environment. My main goal right now is to just view the 
webcam in a small window. I have found lots of info on driver 
development, but I am interested in the application side. Are there any 
c++ examples or references that will help me get started?

Thanks

Re: How to begin v4l2 application development??

[Andy Walls]

On Fri, 2010-07-16 at 14:40 -0500, Bryan Nations wrote:
> I am new to video for linux and would like to know what resources are 
> available to assist me in programming a simple webcam application with 
> c++ in a *nix environment. My main goal right now is to just view the 
> webcam in a small window. I have found lots of info on driver 
> development, but I am interested in the application side. Are there any 
> c++ examples or references that will help me get started?

Read the V4L2 API documentation.  Everything an app programmer can call
is there.

I susggest playing around with the v4l2-ctl utility with your device to
get a feel for what many of the miscellaneous ioctl()'s support.

You may want to look at svv.c here:

	http://moinejf.free.fr/

as a simple test viewer application.

Regards,
Andy

Re: How to begin v4l2 application development??

[Andy Walls]

On Fri, 2010-07-16 at 17:48 -0400, Andy Walls wrote:
> On Fri, 2010-07-16 at 14:40 -0500, Bryan Nations wrote:
> > I am new to video for linux and would like to know what resources are 
> > available to assist me in programming a simple webcam application with 
> > c++ in a *nix environment. My main goal right now is to just view the 
> > webcam in a small window. I have found lots of info on driver 
> > development, but I am interested in the application side. Are there any 
> > c++ examples or references that will help me get started?
> 
> Read the V4L2 API documentation.  Everything an app programmer can call
> is there.

Oops, forgot the link:

http://linuxtv.org/downloads/v4l-dvb-apis/

> I susggest playing around with the v4l2-ctl utility with your device to
> get a feel for what many of the miscellaneous ioctl()'s support.
> 
> You may want to look at svv.c here:
> 
> 	http://moinejf.free.fr/
> 
> as a simple test viewer application.
> 
> Regards,
> Andy
> 
> 
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