Thanks a lot for the tip! I have been looking for a while without
finding much about this.
So now I have
import rhythmdb, rb
import gobject, gtk
import serial
import gst
class SamplePython(rb.Plugin):
def __init__(self):
rb.Plugin.__init__(self)
def activate(self, shell):
print "activating sample python plugin"
level = gst.element_factory_make ("level")
spectrum = gst.element_factory_make ("spectrum")
b = gst.Bin()
b.add (level, spectrum)
shell.get_player().props.player.add_tee_element(b)
self.ser = serial.Serial('/dev/ttyS0', 115200, timeout=1)
self.ser.write("hello")
def deactivate(self, shell):
print "deactivating sample python plugin"
shell.get_player().props.player.remove_tee_element(b)
self.ser.close()
I got most of that from
http://live.gnome.org/RhythmboxPlugins/WritingGuide#head-7cd42591b00fdab44374fd57538003a192960070
There is a problem though. When I try to run it I get
shell.get_player().props.player.add_tee_element(b)
AttributeError: '__main__.RBPlayerGst' object has no attribute
'add_tee_element'
Is the guide wrong? How do I add the elements?
Also what's a GStreamer sink plugin?
Thanks a lot,
Justin Rajewski
Jonathan Matthew-4 wrote:
>
> On Sat, Apr 18, 2009 at 03:06:25PM -0700, EmbeddedMicro wrote:
>>
>> I build and sell RGB LED cubes. The newest version has a serial interface
>> that I would like to utilise using Rhythmbox. I know C, but I am using
>> Python (for the first time) as it is easier.
>>
>> So far I have the plugin set up so it sends "Hello" over the serial port
>> when it is started and that works fine. What I need to do now is make it
>> get
>> information on the sound being played, ie intensity, frequency, etc. Does
>> anyone know how to do that with Python?
>
> Rhythmbox plugins have the ability to insert elements into the GStreamer
> playback pipeline. You can probably get enough information using the
> standard GStreamer 'level' and 'spectrum' elements. Your plugin would
> then handle messages emitted by these elements and use the information
> from those to update the device. I don't think we have any examples of
> plugins that do this currently.
>
> Alternatively, I think you could write a GStreamer sink plugin that took
> care of the whole process, which would make it easier to use this in
> other applications.
>
>
> _______________________________________________
> rhythmbox-devel mailing list
> rhythmbox-devel@gnome.org
> http://mail.gnome.org/mailman/listinfo/rhythmbox-devel
>
>
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