Re: GTKmm Streaming web image

[Michael J M Thomson <mjmt internode on net>]

UNOmar wrote:
> First off I apologize if this has been brought up before but I'm new to the
> list and a quick search didn't turn anything up.
> I have a webcam that I need to display a live image from.  The problem is
> the camera only has an ethernet interface and internal web server.  Is there
> an easy way to grab the stream and insert it into a GTK::Image?  I have
> looked into Gdk::Pixbuf but I don't see anything that would work.  
> My other thought is that I will have to do the socket dance and save the
> stream to a file, but since the stream never ends won't that lock up the
> application (without threads of course)?
> Any thoughts or ideas would be greatly appreciated.
> Thanks,
> UNOmar
>   
Gnome-vfsmm lets you do asynchronous networking (won't lag the GUI), 
consider that for doing the HTTP with. Or go from scratch with socket() 
and Glib::IOChannel::create_from_fd() (IOChannels can call back when 
e.g. the HTTP response is arriving).

For the view, yes you can use a Gdk::Pixbuf: create a blank pixbuf and 
set it as the Gtk::Image's source, then render frames into the pixbuf 
(manipulating the guint8* RGB data returned by get_pixels() is fairly 
quick), calling image.queue_draw() after each frame. You may have to 
call image.set(pixbuf) after each frame as well, not sure if that's 
necessary.

Good luck.