Fix smart rendering

commit 28acd131

pipeline: Restrict the presence only if the user didn't explicitly provided one

commit 06cc7a3f

timeline: Add a simplified version of track selection signal

Most user do not need to select several tracks for a single
TrackElement and this signal is not binding friendly so
this is adding a simpler, more user and binding friendly version

commit 09cc8dde

uri-source: Respect user stream selection

commit e3aabb8b

launch: Also print the position when disabling validate

commit 24a045bf

launch: Print more useful information to stdout

commit 3370a09c

build: Add an option to disable examples

And make it yield as in other modules

commit 261a024c

launcher: Re activate smart rendering support

Now also try to get the best encoding profile for smart rendering when
the user didn't specify anything.

commit baeb054c

ges: Fix smart rendering

Smart rendering has been broken since, mostly forever, but some code
was there pretending it was supported... let's try to stop pretending.

We now keep track of the smart rendering state in the timeline, track
and sources to be able to:

 * tell decodebin to stop plugging more (decoding elements) as soon as
   downstream supports the format.

 * avoid plugging converters after the source element when smart
   rendering.

commit e2169751

validate: Pipe debug output to a file when discovering scenarios

Otherwise `gst-validate-launcher` can get veeery noisy

commit 4d314b71

nle: Minor debug enhancement

commit 1d1f634f

tests: Mark audio identity as audio

Otherwise GES fallbacks to video...

commit 6822b12c

pipeline: stop setting the track caps

Stop setting the track 'caps' property. The previous code could
overwrite a users own setting of the caps for video and audio caps.
Moreover, the 'caps' property is listed as construct only, and users
will likely expect it to stay the same after a track has been added to a
timeline.

commit f2cdd3f9

launcher: Delay setting rendering setting to right before rendering

So that user settings have been applied to the timeline taking into
account any `validatetest` arguments

commit 817a43c2

source: Refactor the way we plug converter elements

Paving the way to skipping converters when rendering smartly

commit 8b3644c3

pipeline: Do not name urisink as `urisink` as it is useless

And actually harmful in case you are debugging several pipelines.

commit 39dfa56a

pipeline: Remove urisink from timeline instead of unrefing it

Doing what was suggested in the FIXME and avoiding to unref
something it while we do not actually own it ourself.

commit 22c49a19

pipeline: Discard encoding profiles that don't match any track

Otherwise we get a 'not linked' error and we should just help
the user as we can here.

If the user adds a new track, he should set a new encoding profile
anyway.

commit 9a3c1af9

uri*source: Factor out common logic into a GESUriSource private data

The two classes are *very* close but have different hierarchy so this
introduces a new GESUriSource structure that is used as private
structure by both subclasses and makes most of the logic shared this
way.

commit 688af230

*uri-source: Call free from the object ->finalize not ->dispose