[gst-devel] switching between subpipelines

[Eric Zhang]

Hi, gstreamer-devel:

    Seems `input-selector' is a choice -- a N-to-1 stream selectoring
element.

Eric Zhang

2008/11/13 Albert Costa <costa_albert at yahoo.fr>

> Hello people,
> I am writing/testing to build a small application where I have 2 possible
> source pipelines for a sink. For example, I would have (if I translate to
> command line):
> gst-launch filesrc location=myfile.avi ! decodebin ! ffmpegcolorspace !
> directdrawsink and at some time I want to switch to videotestsrc !
> ffmpegcolorspace ! directdrawsink (and vice-versa)
> That is, I either get my frames from the (filesrc+decodebin) or the
> (videotestsrc) elements.
> Is there a way to keep 2 such 'subpipelines' created, while only one is
> currently linked to the sink?
> - If I create and add all the elements to the main pipeline but only link
> one branch, I get ofcourse a 'nonlinked' error for the other branch.
> - If I create all, but only add the branch I use (with gst_bin_add_many),
> then remove the branch (with gst_bin_remove_many) and add the new one it
> works. But if I want to revert again, then the elements that got removed in
> the first place cannot be added again.
> Is there a way to keep a bunch of elements such that I can add/remove them
> from the pipeline anytime I want (without having to recreate them) ?
>
> Best Regards,
> Al
>
>
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