Playbin with a passthrough sink.

[Nox Deleo]

Thanks for the suggestions and the clarification...don't know why I didn't
twig to use appsink/src etc before.


On 3 January 2013 20:05, Tim-Philipp Müller <t.i.m at zen.co.uk> wrote:

> On Thu, 2013-01-03 at 18:24 +0000, Nox Deleo wrote:
>
> > I'm trying to use playbin in an unconventional way at the moment.
> > Because of its built in functionality, it's ideal for me to use as a
> > source that spits out raw audio from a continuous playlist without
> > having to reinvent the wheel with different parts. I'm trying to get a
> > ghost pad on the outer layer of playbin that I can hook into the rest
> > of my pipeline, rather than playbin's 'playsink' being the end of the
> > graph.
> >
> > Looking at a debug graph, it looks like I would have to add ghost pads
> > to the 'audio-sink' element I specify, all the way up through a
> > GstBin, a GstPlaySink to the PlayBin itself. This is a pretty ugly
> > hack, and I don't really like the idea of messing with playbin
> > internals, so I'm wondering if anyone knows a better way of doing
> > this?
>
> You could use appsink elements to extract the data and then feed them to
> another pipeline (set sync=true on the sinks to make them sync against
> the clock).
>
> You might possibly also find the inter{audio,video}sink elements useful
> (in combination with an inter{audios,video}src in another pipeline.
>
> > Also, out of interest, is there any reason why I can't link a pad
> > embedded in several layers of bins to another outside of these? It
> > complains about 'no common ancestor' at the moment, but I'm just
> > curious as to the reason.
>
> Not sure what you're doing with ghost pads tbh, it just sounds wrong.
> You can supply your own sink element, or a bin containing other elements
> and ending in a sink (then you need to create a ghost pad for the bin
> that points to the first element in the chain inside it). But just
> adding ghostpads won't achieve anything.
>
> No common ancestore usually either means you're trying to link an
> element that's not inside a pipeline/bin yet, or they're not at the same
> level inside the bin/pipeline hierarchy (the reasons ghostpads exist, so
> you can expose pads from inside a bin at the one-up bin level).
>
> Cheers
>  -Tim
>
>
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