Before this patch, NLE and GES did not support NleOperations (respectively
GESEffects) that changed the speed/tempo/rate at which the source plays. For
example, the 'pitch' element can make audio play faster or slower. In GES 1.5.90
and before, an NleOperation containing the pitch element to change the rate (or
tempo) would cause a pipeline state change to PAUSED after that stack; that has
been fixed in 1.5.91 (see #755012 [0]). But even then, in 1.5.91 and later,
NleComposition would send segment events to its NleSources assuming that one
source second is equal to one pipeline second. The resulting early EOS event
(in the case of a source rate higher than 1.0) would cause it to switch stacks
too early, causing confusion in the timeline and spectacularly messed up
output.
This patch fixes that by searching for rate-changing elements in
GESTrackElements such as GESEffects. If such rate-changing elements are found,
their final effect on the playing rate is stored in the corresponding NleObject
as the 'media duration factor', named like this because the 'media duration',
or source duration, of an NleObject can be computed by multiplying the duration
with the media duration factor of that object and its parents (this is called
the 'recursive media duration factor'). For example, a 4-second NleSource with
an NleOperation with a media duration factor of 2.0 will have an 8-second media
duration, which means that for playing 4 seconds in the pipeline, the seek
event sent to it must span 8 seconds of media. (So, the 'duration' of an
NleObject or GES object always refers to its duration in the timeline, not the
media duration.)
To summarize:
* Rate-changing elements are registered in the GESEffectClass (pitch::tempo and
pitch::rate are registered by default);
* GESTimelineElement is responsible for detecting rate-changing elements and
computing the media_duration_factor;
* GESTrackElement is responsible for storing the media_duration_factor in
NleObject;
* NleComposition is responsible for the recursive_media_duration_factor;
* The latter property finally fixes media time computations in NleObject.
NLE and GES tests are included.
[0] https://bugzilla.gnome.org/show_bug.cgi?id=755012
Differential Revision: https://phabricator.freedesktop.org/D276
Making it possible to create the nleobject right at the creation
of the element.
Reviewed-by: Thibault Saunier <thibault.saunier@collabora.com>
Differential Revision: https://phabricator.freedesktop.org/D738
In get_property we should return the default values if
we have not created any GESTitleSource yet
(instead of segfaulting).
And fix GESTitleSource default values!
Reviewed-by: Thibault Saunier <thibault.saunier@collabora.com>
Differential Revision: https://phabricator.freedesktop.org/D737
Allowing pasting groups paste exactly what had been copied
And not the new version of the contained objects
This technically breaks the C API but this is a new API and I believe
and hope nobody is using it right now.
Reviewed-by: Thibault Saunier <thibault.saunier@collabora.com>
Differential Revision: https://phabricator.freedesktop.org/D616
Integrating python tests in the build system
And cleanup configure.ac
Reviewed-by: Thibault Saunier <thibault.saunier@collabora.com>
Differential Revision: https://phabricator.freedesktop.org/D601
We should never let 3 objects to overlap at a same position, for that
we introduce a "rollback" feature and whenever such an editing happens,
we rollback object position to whatever it was before the move.
Summary:
Handle the fact that some new features can be added and that means
generated files will not be fully understandable by older versions of
the formatter.
Make sure that we set the format version to 0.2 when we serialize the
GstEncodingProfile.enabled property.
Add some tests around that.
+ Fix a minor bug in the test-utils
+ Add a meta on the projects to tell in what format version a project
has been serialized/parsed back
API:
GES_META_FORMAT_VERSION
Depends on D178
Reviewers: Mathieu_Du
Differential Revision: http://phabricator.freedesktop.org/D184
Summary: It must only be done when the object is commited.
We can do that in constructed though, as the changes will
anyway be commited when the object is added to a composition.
Also update the tests, as we set properties spearately then
check the stop, we can commit the source at its creation without
removing meaning from the tests.
Reviewers: thiblahute
Differential Revision: http://phabricator.freedesktop.org/D84
I got some trouble with
arc land
and I wanted to push the 3 commit coming after this revert as 3
different commits but they ended up being all squash into one single
commit, which is clearly not cool for later bisecting and blaming.
Reverting that commit and re pushing those 3 commits as they were
supposed to be.
This reverts commit 9fe15ef435.
The strategy here is to seek at the new end of the composition. And in
GES we always add a 1ns long gap at the end of the tracks so that all
track have the exact same duration, and we have black frames when the
timeline is empty
They were not serialized until now.
That implies several changes:
* Override GESTimelineElement [start, inpoint, duration] properties in
GESGroup to ensure that those properties are not serialized as they
should not be.
* Rename GESBaseXmlContainer->clips field to
GESBaseXmlContainer->containers as the hashtable now contains Groups
https://bugzilla.gnome.org/show_bug.cgi?id=709148
For example if the size has been serialized in a file, but the user has
not personalized the size, we want that whenever the restriction caps
change the size, the video should take the size of the track
restriction caps.
We know need to keep track of the current positionner.size even if
setting through caps size changes.
https://bugzilla.gnome.org/show_bug.cgi?id=739527
We now seek on ready and thus do not need to do magic trying to seek
the source as soon as possible as we now do it even sooner than soon.
Co-Authored by: Thibault Saunier <tsaunier@gnome.org>
