Fixes #516

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

If there was no interlace-mode field in the caps. Read back the value
selected by the driver. This way, if the driver does not support
progressive, then it will automatically negotiate the returned mode
unless this mode is not supported by GStreamer.

This method was already used for colorimetry. Just like colorimetry, the
interlace mode is not longer probed by v4l2src dues to performance
issues.

Fixes #511

Return the size / total duration as a ballpark estimate.

gstreamer/gst-plugins-base#60

Return the upstream size over the duration as a first estimate.

gstreamer/gst-plugins-base#60

Otherwise signal handlers from bindings will take ownership of them as
they are still floating, and we won't own a reference inside rtpbin
anymore.

Fixes gstreamer/gst-plugins-good#515

Decreasing timestamps break rtmpsink.

With contributions from Olivier Crête.

https://bugzilla.gnome.org/show_bug.cgi?id=796382

https://bugzilla.gnome.org/show_bug.cgi?id=796382

Remove the git directory

This fixes gstreamer/gst-plugins-good#513

If ctts (CompositionOffsetBox) has larger sample_offset
(offset between PTS and DTS) than (2 * duration) of the stream,
assume the ctts box to be corrupted and ignore the box.

https://bugzilla.gnome.org/show_bug.cgi?id=797262

https://bugzilla.gnome.org/show_bug.cgi?id=797313

https://bugzilla.gnome.org/show_bug.cgi?id=797313

This element doesn't support planar audio yet.

Without these dependencies, the enumtype may not be generated when the
test is built, which will cause a compile failure.

Make it possible to modify the SDES in a packet at runtime.

https://bugzilla.gnome.org/show_bug.cgi?id=763502

This fixes a bug where in some files mehd.fragment_duration is one unit
less than the actual duration of the fragmented movie, as explained below:

mehd.fragment_duration is computed by scaling the end timestamp of
the last frame of the movie in (in nanoseconds) by the movie timescale.

In some situations, the end timestamp is innacurate due to lossy conversion to
fixed point required by GstBuffer upstream.

Take for instance a movie with 3 frames at exactly 3 fps.

$ gst-launch-1.0 -v videotestsrc num-buffers=3 \
  ! video/x-raw, framerate="(fraction)3/1" \
  ! x264enc \
  ! fakesink silent=false

dts: 999:59:59.333333334,  pts: 1000:00:00.000000000, duration: 0:00:00.333333333
dts: 999:59:59.666666667,  pts: 1000:00:00.666666666, duration: 0:00:00.333333334
dts: 1000:00:00.000000000, pts: 1000:00:00.333333333, duration: 0:00:00.333333333

The end timestamp is calculated by qtmux in this way:

end timestamp = last frame DTS + last frame DUR - first frame DTS =
  = 1000:00:00.000000000 + 0:00:00.333333333 - 999:59:59.333333334 =
  = 0:00:00.999999999

qtmux needs to round this timestamp to the declared movie timescale, which can
ameliorate this distortion, but it's important that round-neareast is used;
otherwise it would backfire badly.

Take for example a movie with a timescale of 30 units/s.

0.999999999 s * 30 units/s = 29.999999970 units

A round-floor (as it was done before this patch) would set fragment_duration to
29 units, amplifying the original distorsion from 1 nanosecond up to 33
milliseconds less than the correct value. The greatest distortion would occur
in the case where timescale = framerate, where an entire frame duration would
be subtracted.

Also, rounding is added to tkhd duration computation too, which
potentially has the same problem.

https://bugzilla.gnome.org/show_bug.cgi?id=793959

In some cases, a bind error occurs during operation. Printing
the information about the problem is critical for finding the
conflict

https://bugzilla.gnome.org/show_bug.cgi?id=797340

https://bugzilla.gnome.org/show_bug.cgi?id=797326

https://bugzilla.gnome.org/show_bug.cgi?id=797273

Add HEVC encoder support.

https://bugzilla.gnome.org/show_bug.cgi?id=797141

We can now use the new GstFAllocator to ask the allocator not to close
the wrapped FD. This way the dup is no longer needed.

There is no specific needs to duplicate the FD. Unlike the exportation,
we don't depend on code that will call close. This will make debugging
easyer since the traced FD will match the exporter.

https://bugzilla.gnome.org/show_bug.cgi?id=797327

qtmux: Add property for providing a threshold after which we create an edit list for gaps at the start

https://bugzilla.gnome.org/show_bug.cgi?id=797290

It was previously set to the display aspect ratio, e.g. 4x3, 16x9, etc.
but should be set to the display size.

This is a regression from e655d47d
(1.5.1) and was correct before that.

https://bugzilla.gnome.org/show_bug.cgi?id=797318

Previous commit created caps with incorrect aac codec data
that did not match the audio channel.

https://bugzilla.gnome.org/show_bug.cgi?id=797256

g_ptr_array_find_with_equal_func was introduced in glib 2.54
which is a higher version than our minimum required one.

https://bugzilla.gnome.org/show_bug.cgi?id=797239

GHashTable iteration order changed in recent GLib,
and tests were relying on that.

https://mail.gnome.org/archives/desktop-devel-list/2018-October/msg00016.html

... before the old streams is not exposed yet for MSS stream.

In case of DASH, newly configured streams will be exposed
whenever demux got moov without delay.
Meanwhile, since there is no moov box in MSS stream,
the caps will act like moov. Then, there is delay for exposing new pads
until demux got the first moof.

So, following scenario is possible only for MSS but not for DASH,
STREAM-START -> CAPS -> (configure stream but NOT EXPOSED YET)
-> STREAM-START-> CAPS (configure stream again).

In above scenario, we can reuse old stream without any stream reconfigure.

https://bugzilla.gnome.org/show_bug.cgi?id=797239

GPtrArray has less overhead than linked list and the length also
can be auto updated by using it.

https://bugzilla.gnome.org/show_bug.cgi?id=797239

This a prework for porting GPtrArray.
Refcounting will help the use of g_ptr_array_new_with_free_func()
with QtDemuxStream structure

https://bugzilla.gnome.org/show_bug.cgi?id=797239

https://bugzilla.gnome.org/show_bug.cgi?id=797239

If they are not valid, then let a downstream parser complete them.

https://bugzilla.gnome.org/show_bug.cgi?id=796878

https://bugzilla.gnome.org/show_bug.cgi?id=796652

Use 'copy' keyword to avoid meson warning message.
Note that 'copy' keyword in configure_file() is available
since meson 0.47.0

https://bugzilla.gnome.org/show_bug.cgi?id=797298

Apart from the obvious drawbacks of hardcoding, the drawback here was
that, if we subtracted 2 frames (instead of 2.6) from the target running
time, we'd request the next keyframe a bit too far into the future,
which would make our files split at the wrong position.

https://bugzilla.gnome.org/show_bug.cgi?id=797293

https://bugzilla.gnome.org/show_bug.cgi?id=797290