Influencing playbin2/decodebin2 auto-plugging

[Tim-Philipp Müller]

On Thu, 2012-08-02 at 19:03 +0200, Stefan Sauer wrote:
> On 08/02/2012 04:39 PM, Tvrtko Ursulin wrote:
> 
> > 
> > Is there a way to dynamically influence auto-plugging in playbin2/decodebin2, 
> > for example by upranking or deranking elements?
>
> No. https://bugzilla.gnome.org/show_bug.cgi?id=649542

This is just convenience API, of course you can do such things
dynamically.

You can manually set element ranks at runtime in your application by
looking up the GstElementFactory/GstPluginFeature in the registry after
gst_init() and setting the plugin rank via
gst_plugin_feature_set_rank().

Then there are the "autoplug-{factories,sort,select}" signals on
decodebin2/uridecodebin, which you can use to tweak the autoplugging.

You can use those in playbin2 as well, but you need to "somehow" find
the uridecodebin element inside playbin2.

As for the vaapi stuff, I thought this should just work automagically
these days (with latest releases) if the video-sink set supports it
(like vaapi*sink or cluttersink). Perhaps it's only in git, don't
remember. I'm sure someone will correct me if needed :)

What problem are you trying to solve exactly?

 Cheers
  -Tim