What is the best practice to create a bin's pipeline?

[mick_coracin]

Hi,

I would like to create the pipeline of a custom bin differently depending on a user option given through calling application.

What is the best way to do this, knowing that the application is based on Playbin2?

I mean, what is the best communication channel to do this?
Can this be done before the whole pipeline goes in "PLAYING STATE"?

I need somehow to know from the application that this particular bin has been selected by Playbin2 and created. Then how to access it for configuration?

Thanks and regards,
Michael

[mick_coracin]

No one to help on this? Let me give some more details on the options I think I have to do this, and please let me know what you would recommend.

1) Ideally, I would like to know about the user's selected option when the gst_plugin_init function is called.
But I don't know if it is possible at that time.

2) Send a message from the Bin to the application (GST_MESSAGE_ELEMENT), so that the application is then able to call a g_object_set() to set a property. (Then I hope that I'll be able to modify the created bin's pipeline dynamically to do what I want).
Question: Is it possible to send a message from a Bin? In my case, the Bus is NULL so the post message fails. I don't know if it is normal or if my bin is wrongly initialized...?

3) Send a signal from the Bin to the application when the bin is created, so that the application can call g_object_set().

4) Any other recommended way??

It would help a lot if you can give your advises on this.

Thanks and regards,
Michael