[Bug 742924] decodebin: Initial decoder negotiation will always fail

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=742924

--- Comment #8 from Sebastian Dröge (slomo) <slomo at coaxion.net> ---
What exactly is the problem? Does someone know by now? ;)

Is it that the decoder srcpad is not blocked and as such the CAPS event and
following ALLOCATION query goes into nothing and fails then? And that this now
happens newly because we set the decoders to PAUSED inside decodebin manually
to check if they themselves handle the CAPS event properly (and skip decoders
that fail to handle specific caps)?

If so, maybe we could change decodebin to already expose pads when they receive
the final CAPS event instead of waiting for all pads to be ready before
exposing them all at once?

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