[gst-devel] How control state of a video streaming pipeline & g_main_loop_run()
123sandy at gmail.com
Mon Jul 19 07:08:35 CEST 2010
> /* we add all elements into the pipeline */
> gst_bin_add_many (GST_BIN (pipeline),
> source, videorate, filter, encoder, payloader, sink,
> gst_element_link_many (source, videorate, filter, encoder, payloader,
> sink, NULL);
What is the role of the "filter" element here?
> I want to control its state from an external program,but I saw that
> g_main_loop_run() blocks the execution of the pipe.
By external program you mean from a different process launched from the same
application, or a completely different program, or a different thread?? Plz
> 1) Control the state of the pipe: when I want to stop stream I set the
> pipe to the READY state; when I want to stream I set it to PLAY. I think
> that in this way I reduce the launch time of the pipe. Is it exactly?
> Have I to add a bus? Can anyone suggest me a possible solution?
You can add a bus watch as follows:
gboolean bus_call(GstBus *bus, GstMessage *msg, gpointer data)
bus = gst_pipeline_get_bus (GST_PIPELINE(pipeline));
gst_bus_add_watch (bus, bus_call, NULL);
> 2) Launch a g_main_loop_quit.
> What do you think about? Is it possible to do that?
Not sure what is "Launching a g_main_loop_quit" is? Plz Explain.
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