Re: How can I add an effect to cheese that I created in python

["Oleksij Rempel (Alexey Fisher)" <bug-track fisher-privat net>]

Hi,

On 01.01.2012 16:19, Rick T wrote:
> Greetings All
>
> I would like to add an effect to cheese for linux are there any examples of
> how to do this?
>
> An example would be to place a running date time stamp at the bottom of the
> screen of the cheese video window

you do not need to write a new effect from scratch. all you need is to 
add some of the gstreamer elements to the video pipeline.
For example try this commandline:
gst-launch-0.10 v4l2src ! video/x-raw-yuv, width=640, height=480 ! 
clockoverlay ! autovideosink

> here's an example of the python code.  Keep in mind it wouldn't have the
> buttons of course but it will give you an idea of
> what I want to have at the bottom of the cheese window.
>
> ## {{{ http://code.activestate.com/recipes/124894/ (r2)
> from Tkinter import *
> import time
> import pygtk
> import gtk
> import time
>
> class StopWatch(Frame):
>      """ Implements a stop watch frame widget.
> """
>      def __init__(self, parent=None, **kw):
>          Frame.__init__(self, parent, kw)
>          self._start = 0.0
>          self._elapsedtime = 0.0
>          self._running = 0
>          self.timestr = StringVar()
>          self.makeWidgets()
>
>      def makeWidgets(self):
>          """ Make the time label. """
>          l = Label(self, textvariable=self.timestr)
>          self._setTime(self._elapsedtime)
>          l.pack(fill=X, expand=NO, pady=2, padx=2)
>
>      def _update(self):
>          """ Update the label with elapsed time. """
>          self._elapsedtime = time.time() - self._start
>          self._setTime(self._elapsedtime)
>          self._timer = self.after(50, self._update)
>
>      def _setTime(self, elap):
>          """ Set the time string to Minutes:Seconds:Hundreths """
>          hours = int(elap/3600)
>          elap -= hours*3600
>          minutes = int(elap/60)
>          elap -= minutes*60
>          seconds = int(elap)
>          elap -= seconds
>          hseconds = int(elap*100)
>
>
>          sn = time.strftime('%m/%d/%Y-%H:%M:%S')
>          self.timestr.set('%02s\n\n%02dh:%02dm:%02ds:%02d' %
> (sn,hours,minutes, seconds, hseconds))
>
>      def Start(self):
>          """ Start the stopwatch, ignore if running. """
>          if not self._running:
>              self._start = time.time() - self._elapsedtime
>              self._update()
>              self._running = 1
>
>      def Stop(self):
>          """ Stop the stopwatch, ignore if stopped. """
>          if self._running:
>              self.after_cancel(self._timer)
>              self._elapsedtime = time.time() - self._start
>              self._setTime(self._elapsedtime)
>              self._running = 0
>
>      def Reset(self):
>          """ Reset the stopwatch. """
>          self._start = time.time()
>          self._elapsedtime = 0.0
>          self._setTime(self._elapsedtime)
>
>
>
> def main():
>      root = Tk()
>      root.title( "Stop Watch" )
>      sw = StopWatch(root)
>      sw.pack(side=TOP)
>
>      Button(root, text='Start', command=sw.Start).pack(side=LEFT)
>      Button(root, text='Stop', command=sw.Stop).pack(side=LEFT)
>      Button(root, text='Reset', command=sw.Reset).pack(side=LEFT)
>      Button(root, text='Quit', command=root.quit).pack(side=LEFT)
>
>      root.mainloop()
>
> if __name__ == '__main__':
>      main()
> ## end of http://code.activestate.com/recipes/124894/ }}}
>
>
> thanks
> Rick
>
> --
>
>
>
>
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> http://mail.gnome.org/mailman/listinfo/cheese-list


--
Regards,
Oleksij