[Bug 634407] decodebin2 should expose pads in a deterministic order

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=634407
  GStreamer | gst-plugins-base | unspecified

--- Comment #5 from Christian Fredrik Kalager Schaller <Uraeus at linuxrising.org> 2011-07-18 15:41:53 UTC ---
Text from 654830:
It is currently quite hard to work with files that have multiple streams of the
same type using discoverer and uridecodebin and encodebin, as apart from the
technical characteristics there seems to be no way of identified each stream.
So especially when two streams are technically identical, ie. mp3 audio. It is
a pain to deal with in a 100% safe way.

It would be nice if we could come up with a system where
discoverer could create some kind of unique identifier for each stream
it finds. That way when we am connecting uridecodebin to encodebin or
other elements I can look for the pad with that unique identifier and
connect that, would probably simplify writing applications to handle
this case a lot. If discoverer and uridecodebin where also able to
automatically attach any language information to each stream, based on
tag data etc. that would also be great.

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