Queues empty even when stream is inactive

[Steve W]

Hi Michiel,

I see. Is there a way to not drop the buffers from inactive streams?  Perhaps somehow block the queue?

Thanks

Steve
On 17 Jun 2022, 6:47 AM +1000, Michiel Konstapel via gstreamer-devel <gstreamer-devel at lists.freedesktop.org>, wrote:
> On 16-06-2022 19:52, Steve W via gstreamer-devel wrote:
> > Hello all
> >
> > I’m trying to switch between two queues using input-selector:
> >
> > input-selector name=i sync-streams=true sync-mode=clock
> > cache-buffers=true
> > … ! queue max-size-time=0 name=q1 ! i.
> > … ! queue max-size-time=0 name=q2 ! i.
> > i. ! fakesink
> >
> > I’ve added buffer probes to the sources of q1 and q2. Even when the
> > input-selector has the active pad set to one stream, both of the
> > buffer probes are triggered. Regardless of the duration rolled,
> > current-level-buffers is always 0 for both q1 and q2. It seems to
> > suggest that both queues are consumed even when the active pad is set
> > to only one stream. Does anyone know why this might be the case?
> >
> > Thanks
>
> If I understand correctly, even with those properties, the
> input-selector will consume buffers from all its inputs, but drop
> everything except buffers from the active pad. `cache-buffers` only
> applies to (quoting the docs) "buffers still considered valid (after
> current running time, see sync-mode)". Even in that case, they will have
> been consumed from the queue, and when their time has passed, they'll
> still be dropped.
> Michiel
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