[gst-devel] What happens to a bus, when a bin is inserted into another bin?

[Stefan Kost]

wl2776 wrote:
> I am working on playing an audio stream from a separate file.
>
> My approach is to construct an instance of the playbin2, listen to the
> messages on its bus, analyze them and their sources, and decide if both
> audio and video streams are present.
>
> Then, if the audio stream is in the separate file, construct missing parts
> of the playbin2 - one more uridecodebin, playsink and connecting elements
> (audiotee, inputselector, etc) - and add them to the playbin2 instance.
>
> So, the question is. 
> The uridecodebin and the playsink are bins, therefore, they have their own
> buses.
> What should I do with these buses?
>
> Next stage will be clock, I'll deal with it later.
>   
The application should only use the bus of the toplevel bin akak the
pipleine. gstreamer handles the aggregation and forwarding internaly.
Thats why you don't specify a concrete bus when doing
gst_element_post_message().

Stefan