A question about multiple players

[David Ing]

That is correct actually.  Do a get_state to wait for the state change to
complete.

On Sat, Sep 7, 2019, 1:25 AM Ian Davidson <id012c3076 at blueyonder.co.uk>
wrote:

> This is a guess.
>
> I suspect that step 8 (setting the state to NULL) may take some time to
> complete.  Does it raise a signal when the state changes? If you set the
> state to NULL and then blindly go ahead and unref things you are hoping
> that the state change will have completed quickly.  So, sometimes, you
> will 'get away with it' and sometimes you will crash.
>
> Ian
>
>
> On 06/09/19 23:45, Olivier Crête wrote:
> > Hi,
> >
> > You don't need a separate gmainloop per pipeline, you can use the same
> one for all of them. They'll all use the default main context. So you do
> steps 3 & 6 only once.
> >
> > Olivier
> >
> > On September 6, 2019 4:32:41 p.m. EDT, Ben Rush <ben at ben-rush.net>
> wrote:
> >> I have a need to put multiple video windows in a single application.
> >> This
> >> means multiple pipelines. For example, the RTSP URL is different for
> >> each
> >> player, and so I get a new pipeline for each invocation
> >> of gst_parse_launch.
> >>
> >> I can share code, but in general: what is the best way to do this? The
> >> way
> >> I'm doing this now (for EACH player I've instantiated in the SAME app):
> >>
> >> 1) gst_parse_launch, get back the pipeline,
> >> 2) gst_pipeline_get_bus, to create a bus on this pipeline.
> >> 3) g_main_loop_new(NULL, FALSE) to create a new loop (this is where my
> >> main
> >> question is at)
> >> 4) gst_bus_add_watch to create an add watch on this pipeline,
> >> 5) gst_element_set_state to set my pipeline state to GST_STATE_PLAYING
> >> 6) g_main_loop_run on the loop returned from #3
> >> 7) Then I play until a stop is issued....
> >> 8) gst_element_set_state(pipeline, GST_STATE_NULL)
> >> 9) unref the bus,
> >> 10) unref the pipeline
> >> 11) unref the loop
> >>
> >> I ask about this order, and the fact I'm creating a new loop without an
> >> independent context because I'm getting some random crashes in my app
> >> hosting multiple players, and it appears to be during tear down. In
> >> general, is this pattern acceptable, or have I committed a sin
> >> somewhere?
>
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