bounding box height
identifier of this particular ROI
parent #GstMeta
list of #GstStructure containing element-specific params for downstream, see gst_video_region_of_interest_meta_add_param(). (Since: 1.14)
identifier of its parent ROI, used f.i. for ROI hierarchisation.
GQuark describing the semantic of the Roi (f.i. a face, a pedestrian)
bounding box width
x component of upper-left corner
y component of upper-left corner
Attach element-specific parameters to meta meant to be used by downstream
elements which may handle this ROI.
The name of s is used to identify the element these parameters are meant for.
This is typically used to tell encoders how they should encode this specific region.
For example, a structure named "roi/x264enc" could be used to give the
QP offsets this encoder should use when encoding the region described in meta.
Multiple parameters can be defined for the same meta so different encoders
can be supported by cross platform applications).
Extra buffer metadata describing an image region of interest