[gst-devel] some queue advice

[in7y118 at public.uni-hamburg.de]

2 things:

I think the pipeline doesn't need to be paused when you use the opt scheduler. 
AFAIK gst-player doesn't pause when adding/removing the visualization part. Ask 
Julien to be sure plz.

As for how I'd construct the pipeline:
+thread/bin--------+
| input1 --        |      
|          \       | +thread--------------+
| input2 -- adder -+-+- queue --- osssink |
|          /       | +--------------------+
| input3 --        |
+------------------+
And then pause the left part when adding to/removing from it.

Benjamin


Quoting Thomas Vander Stichele <thomas at apestaart.org>:

> Hey guys,
> 
> I need a bit of queueing advice.
> 
> I'm writing a python-based radio application that needs to be able to
> play more than one stream at once to the same sound card.
> 
> I have abstracted some python classes for this, and I need to fix only
> one more problem.
> 
> Basically, I need to gaplessly add and remove input decoding bins.
> 
> The pipelines used consist of:
> - one or more decoding bins (gnomevfssrc ! vorbisfile ! volume !)
> - an adder mixer
> - an osssink
> 
> In the first iteration, all of this went into a thread, and this worked
> nicely, except for one problem.  To remove or add input decoding bings
> to adder, the pipeline needs to be paused, then the bin gets added and
> connected to mixer, then the pipeline is set to play again.  This causes
> drops in the audio feed, of course.
> 
> So I tried to fix this by putting in one more thread with a queue.  I
> got various results, ranging from dropping of audio to just plainly
> locking my machine tight.
> 
> So, my question is; if I want gapless addition/removal of input streams,
> what should I be wrapping in a thread and how so I get continuous
> playback ?
> 
> >From that answer, I can try and look what goes wrong in that case and
> see if I can fix it.
> 
> Thomas
> 
> 
> Dave/Dina : future TV today ! - http://davedina.apestaart.org/
> <-*- thomas (dot) apestaart (dot) org -*->
> Faded I'm sure
> but love seems to stick in the veins you know
> <-*- thomas (at) apestaart (dot) org -*->
> URGent, best radio on the net - 24/7 ! - http://urgent.rug.ac.be/
> 
> 
> 
> 
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