[Bug 766537] identity: add property keep every N-th buffer

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=766537

--- Comment #13 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
(In reply to Gregoire from comment #12)
> I could add the second property but isn't it becoming a gas factory? ;-)
> 
> In my use case, I wasn't able to implement it in a pad probe though I tried
> very hard. My identity was between decodebin and glimagesink and with
> hardware acceleration on Android where the buffer is passed directly from
> the decoder to the GPU, returning drop flow in the pad was not working.

A pad probe returning GST_PAD_PROBE_DROP should definitely work if done
correctly.

(In reply to Tim-Philipp Müller from comment #11)
> It feels like a very specific thing to me. Do we really need to add a
> property to identity for that? It can easily be achieved with a pad probe
> too.

My argument would be that all debugging property in identity were added for
specific use cases initially.

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