[gst-devel] Gstreamer and Cocoa run loops

[Rohit Atri]

Actually I'm trying to do a similar thing with Qt. Right now I have a 0sec
timer in Qtimer - every time it goes off, I manually pull messages from the
bus. Problem is  both exec() of a Qthread and main loops run can't co-exist.
So what do people normally do it such scenarios?

Thanks in advance!

On Sun, Jan 30, 2011 at 10:55 PM, Jonathan Lyons
<higher.orbital at gmail.com>wrote:

> I'm having a lot of difficulty integrating the bus of a Gstreamer pipeline
> with a Cocoa run loop. Right now I'm using a CFMessagePort to turn a sync
> signal on one thread into an async event on the main thread. However, this
> results in weird delays and bugs.
>
> Has anyone on this list tried this? Would it be better to run all media
> operations on another thread which itself runs a glib main loop?
>
> I look forward to any response. Thank you.
>
> On Jan 30, 2011, at 8:53 AM, Nicolas Bertrand wrote:
>
> > Hi,
> > I use gstreamer via pygst.
> > with the version 0.10.32 from launchpad dev. ppa I did not success to
> > execute add_buffer_probe = The callback is never executed.
> >
> > This works fine with an older version of python-gst / libgstreamer. (cf.
> > version details below)
> >
> > Code Example :
> >
> >   def _capture_start_cb(self, wbin, b) :
> >
> >         pad = self.get_by_name("JpegEncoder").src_pads().next()
> >
> >         self._grabprobe = pad.add_buffer_probe(self._cb_process_frame,
> True)
> >
> >
> >
> >     def  _cb_process_frame(self, pad, gst_buffer, ret):
> >
> >         """ Callbak to inidicate that buffer is available from probe """
> >
> >
> >
> >         pad.remove_buffer_probe(self._grabprobe)
> >
> >
> >         return True
> >
> >
> > Did somebody know if it is a misuse or a real problem ( in that case I
> > fill a bug) ?
> >
> > cheers,
> > nico
> >
> > Problem constated Versions :
> > Ubuntu/lucid (64 bits)
> > python-gst0.10 0.10.21-1~lucid1
> > libgstreamer0.10-0 0.10.32-1~lucid1
> >
> > No problem constated version :
> > Ubuntu/maverick (32 bits)
> > python-gst0.10 0.10.19.4-1~lucid1
> > libgstreamer0.10-0 0.10.32-1~lucid1
> >
> >
> >
> >
> >
> >
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>
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