[gst-devel] signal in multithreaded program

[Christophe Fergeau]

Hi,

You know about http://developer.gnome.org/doc/API/2.0/gdk/gdk-
Threads.html ,do you ?

Christophe

On jeu, 2004-07-01 at 08:56 +0100, Frank Cheng wrote:
> Hi, Thanks for the response. I have been chasing the problem and finally
> locate it in the Gtk functions. Some extra work has to be done to make
> the Gtk work properly in multi-threaded program.
> 
> Cheers,
> Frank
> 
> 
> On Wed, 2004-06-30 at 11:45, Benjamin Otte wrote:
> > I'd say you're either missing something in your code or spider screws up
> > somewhere. But without seeing that code it's not that easy to say.
> > *hinthint*
> > gst-launch -v { filesrc location=/your/file ! spider ! { queue !
> > ffcolorspace ! fakesink } }  should work though (as in print out lots of
> > lines about buffers arriving on fakesink.
> > 
> > Benjamin
> > 
> > 
> > On Wed, 30 Jun 2004, Frank Cheng wrote:
> > 
> > > Hello,
> > >
> > > I am writing a program to display a piece of video. Gstreamer is used as
> > > the multimedia framework and Gtk is used to make the GUI. I tried a
> > > multithreaded method but got some problems. Please help.
> > >
> > > In the main thread, I added a  "filesrc" and a "spider". Then after the
> > > spider, I created another thread, and put a "queue", a  "ffcolorspace"
> > > and a "fakesink".  So I could do the decoder work in the main thread and
> > > the colorspace conversion in the other thread.
> > >
> > > To get the data out from this pipeline, I linked a callback function,
> > > which dealt with the video data, to the "handoff" signal of the
> > > fakesink. Note the fakesink is in the new thread.
> > >
> > > However, the program never runs. It hangs after the pipeline is built.
> > > It seems that it stayed in the "gst_iterate", but no data is pass
> > > through this fakesink. The callback function has never been called. I
> > > guess the "handoff" signal in the new thread is somehow lost in somewhere.
> > >
> > > Please help me.
> > >
> > > Cheers,
> > > Frank
> > >
> > >
> > >
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