The capabilities used to choose the output of the #GESTrack's elements. Internally, this is used to select output streams when several may be available, by determining whether its #GstPad is compatible (see #NleObject:caps for #nlecomposition). As such, this is used as a weaker indication of the desired output type of the track, before the #GESTrack:restriction-caps is applied. Therefore, this should be set to a generic superset of the #GESTrack:restriction-caps, such as "video/x-raw(ANY)". In addition, it should match with the track's #GESTrack:track-type.
Note that when you set this property, the #GstCapsFeatures of all its #GstStructure-s will be automatically set to #GST_CAPS_FEATURES_ANY.
Once a track has been added to a #GESTimeline, you should not change this.
Default value: #GST_CAPS_ANY.
The #nlecomposition:id of the underlying #nlecomposition.
Forward all children messages, even those that would normally be filtered by the bin. This can be interesting when one wants to be notified of the EOS state of individual elements, for example.
The messages are converted to an ELEMENT message with the bin as the
source. The structure of the message is named GstBinForwarded and contains
a field named message that contains the original forwarded #GstMessage.
Whether the track should support the mixing of #GESLayer data, such as composing the video data of each layer (when part of the video data is transparent, the next layer will become visible) or adding together the audio data. As such, for audio and video tracks, you'll likely want to keep this set to %TRUE.
The parent of the object. Please note, that when changing the 'parent' property, we don't emit #GObject::notify and #GstObject::deep-notify signals due to locking issues. In some cases one can use #GstBin::element-added or #GstBin::element-removed signals on the parent to achieve a similar effect.
The capabilities that specifies the final output format of the #GESTrack. For example, for a video track, it would specify the height, width, framerate and other properties of the stream.
You may change this property after the track has been added to a #GESTimeline, but it must remain compatible with the track's #GESTrack:caps.
Default value: #GST_CAPS_ANY.
The track type of the track. This controls the type of #GESTrackElement-s that can be added to the track. This should match with the track's #GESTrack:caps.
Once a track has been added to a #GESTimeline, you should not change this.
If set to %TRUE, the bin will handle asynchronous state changes. This should be used only if the bin subclass is modifying the state of its children on its own.