[Bug 634407] decodebin2 should expose pads in a deterministic order
bugzilla at gnome.org
Thu Mar 15 17:14:26 PDT 2012
GStreamer | gst-plugins-base | unspecified
--- Comment #25 from Tim-Philipp Müller <t.i.m at zen.co.uk> 2012-03-16 00:14:20 UTC ---
I think we need three things in the end:
1) allow demuxers to signal an *order* for
their source pads, so that "the first"
audio stream will always be first in the
list (whichever list that is, playbin's list
for example, or the order in which
decodebin2/uridecodebin exposes the
pads), and "the second" will always be
2) *stable unique identifiers* for different
streams to match the same stream
across multiple runs. This could tie in
with the order thing from (1), but
doesn't have to.
3) a way for a demuxer to signal upper
layers which stream is the *default*
one; e.g. a container might have info
that audio stream #3 or language XY
is supposed to be the default, and
we should be able to communicate
These don't have to be all done at once, but there's some overlap it seems to
me, so might not hurt to think if we can come up with something that takes care
of all of these things, or at least 1) and 2).
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