[Bug 758212] playbin adds the template caps on autoplug-query

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=758212

--- Comment #17 from Matthew Waters (ystreet00) <ystreet00 at gmail.com> ---
(In reply to Sebastian Dröge (slomo) from comment #16)
> The problem is that playsink can only create the pads once it knows the caps
> of the stream, and e.g. if there is an audio or video stream at all.

And why can't the pad request create the chain for the specified playsink
flags?

> What my patch does now is that we assume that we can convert every raw
> format on sysmem, and for everything else we need direct sink support. Which
> should be the case in all normal situations but we might also want to check
> the playsink flags here (e.g. native-video means we actually can't convert,
> no deinterlace flag means we can't deinterlace, etc).

Again, would be much simpler if one could push the caps query through playsink.

One could also emulate pushing the caps query through the
audio-filter/video-filter elements as well if absolutely necessary although
that's starting to become ridiculous.

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