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If you have maby field, printed actions where unreadable, clean that
up by adding new lines.

This is particularly useful for scenario that define constants
that are used to check video frame checksum for example, we can
now have one single 'scenario' file that defines consts for the
checksum of the frames, and those can be reused everywhere.

gst_validate_override_register_by_name() was not working when using a
pad name because by the time gst_validate_pad_monitor_do_setup()
was called to set the name of the monitor it was too late for overrides
to have any effect.

Patch written by Thibault.

This commit adds a .gitlab-ci.yml file, which uses a feature
to fetch the config from a centralized repository. The intent is
to have all the gstreamer modules use the same configuration.

The configuration is currently hosted at the gst-ci repository
under the gitlab/ci_template.yml path.

Part of gstreamer/gstreamer-project#29

Using the element that owns the pad on which we are connecting
was not making sense.

One print statement wasn't ported to Python3.

https://bugzilla.gnome.org/show_bug.cgi?id=797342

https://gitlab.gnome.org/GNOME/glib/merge_requests/7

We were just iterating over the list without any check and could end
up with a patch that was not corresponding to the actual scenario.

This is what xvfb-run so let's consider it good enough

Otherwise it doesn't get correctly exported when building with MSVC

This autodetection is needed on iOS inside Cerbero where
gstreamer-check-1.0 is not available.

Fixes error reported by ceyusa:

gst-devtools/meson.build:23:0: ERROR:  Multiplication works only with integers.

Requires Meson 0.48, but the feature will be ignored on older versions
so it's safe to add it without bumping the requirement.

Documentation:
https://github.com/mesonbuild/meson/blob/master/docs/markdown/Reference-manual.md#shared_library

Needed by Cerbero.

This patch removes the quotes surrounding the command shown by
gst-validate to reproduce the issues -- which were troublesome when
copying and pasting.

It also introduces escaping for the arguments, so that the command line
can be copied and pasted in the terminal without further changes.

https://bugzilla.gnome.org/show_bug.cgi?id=796897

The rest will be converted later, these are necessary for gst-build to
set options correctly.

https://bugzilla.gnome.org/show_bug.cgi?id=795107

Allowing writing simpler to read scenarios.

You often want to make sure that elements from a particular plugins
are always/never plugged, `set-rank,name=plugin-name,rank=XXX` allows
you to simply do that.

It was always meant to be 'skipped' to be 100% compatible with xunit
xsl.

Makes jenkins happy again

We used to print the whole environment, making it ugly and hard to
read.

Any local variable related to the stream should be resetted
when the pad is deactivated

Avoids weird issues when elements are re-used (and pads are deactivated
and reactivated).

It was not stopping on error.

https://bugzilla.gnome.org/show_bug.cgi?id=796608

Add a stupid simple testsuite made to be configured from the outside

This is what other modules use

Introducing the `.media_info.push` media info extension, which is meant
to let the launcher know that those file should run with the "pushfile://"
protocol.

And allow symlinking "normal" `.media_info` to their `.pushfile` variant
so that both can share the exact same content.

This is useful when you want to check only the demuxer output.

- Keep the information in the media file so that we can launch media-check
  with the proper arguments in the launcher. Update it accordingly.
- Refactor compare_streams to simplify it, which in the end leads to
  reporting all the issues instead of exiting on the first one.

And this way is to set the attribute to... `unknown`