rsvgoverlay
This elements overlays SVG graphics over the video. SVG data can either be specified through properties, or fed through the data-sink pad.
Position and dimension of the SVG graphics can be achieved by specifying appropriate dimensions in the SVG file itself, but shortcuts are provided by the element to specify x/y position and width/height dimension, both in absolute form (pixels) and in relative form (percentage of video dimension).
For any measure (x/y/width/height), the absolute value (in pixels) takes precedence over the relative one if both are specified. Absolute values must be set to 0 to disable them.
If all parameters are 0, the image is displayed without rescaling at (0, 0) position.
The fit-to-frame property is a shortcut for displaying the SVG overlay at (0, 0) position filling the whole screen. It modifies the values of the x/y/width/height attributes, by setting height-/width-relative to 1.0. and all other attributes to 0.
Example launch lines
gst-launch-1.0 -v videotestsrc ! videoconvert ! rsvgoverlay location=foo.svg ! videoconvert ! autovideosink
specifies the SVG location through the filename property.
gst-launch-1.0 -v videotestsrc ! videoconvert ! rsvgoverlay name=overlay ! videoconvert ! autovideosink filesrc location=foo.svg ! image/svg ! overlay.data_sink
does the same by feeding data through the data_sink pad. You can also specify the SVG data itself as parameter:
gst-launch-1.0 -v videotestsrc ! videoconvert ! rsvgoverlay data='<svg viewBox="0 0 800 600"><image x="80%" y="80%" width="10%" height="10%" xlink:href="foo.jpg" /></svg>' ! videoconvert ! autovideosink
Hierarchy
GObject ╰──GInitiallyUnowned ╰──GstObject ╰──GstElement ╰──GstBaseTransform ╰──GstVideoFilter ╰──rsvgoverlay
Factory details
Authors: – Olivier Aubert
Classification: – Filter/Editor/Video
Rank – none
Plugin – rsvg
Package – GStreamer Bad Plug-ins
Pad Templates
data_sink
image/svg+xml:
image/svg:
text/plain:
sink
video/x-raw:
format: BGRA
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
src
video/x-raw:
format: BGRA
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
Properties
fit-to-frame
“fit-to-frame” gboolean
Fit the SVG to fill the whole frame.
Flags : Read / Write
Default value : false
height-relative
“height-relative” gfloat
Specify a height relative to the display size.
Flags : Read / Write
Default value : 0
width-relative
“width-relative” gfloat
Specify a width relative to the display size.
Flags : Read / Write
Default value : 0
x-relative
“x-relative” gfloat
Specify an x offset relative to the display size.
Flags : Read / Write
Default value : 0
y-relative
“y-relative” gfloat
Specify a y offset relative to the display size.
Flags : Read / Write
Default value : 0
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