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Properties
| gdouble | alpha | Read / Write |
| gchar * | location | Read / Write |
| gint | offset-x | Read / Write |
| gint | offset-y | Read / Write |
| gint | overlay-height | Read / Write |
| gint | overlay-width | Read / Write |
| gdouble | relative-x | Read / Write |
| gdouble | relative-y | Read / Write |
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseTransform ╰── GstGLBaseFilter ╰── GstGLFilter ╰── GstGLOverlay
Description
Overlay GL video texture with a PNG image
Examples
1 |
gst-launch-1.0 videotestsrc ! gloverlay location=image.jpg ! glimagesink |
FBO (Frame Buffer Object) is required.
Synopsis
Element Information
plugin |
opengl |
author |
Filippo Argiolas <filippo.argiolas@gmail.com>, Matthew Waters <matthew@centricular.com> |
class |
Filter/Effect/Video |
Element Pads
name |
sink |
direction |
sink |
presence |
always |
details |
video/x-raw(ANY), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], texture-target=(string)2D |
| video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], texture-target=(string)2D |
name |
src |
direction |
source |
presence |
always |
details |
video/x-raw(memory:GLMemory), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], texture-target=(string)2D |
| video/x-raw(ANY), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], texture-target=(string)2D |
Property Details
The “alpha” property
“alpha” gdouble
Global alpha of overlay image.
Flags: Read / Write
Allowed values: [0,1]
Default value: 1
The “location” property
“location” gchar *
Location of image file to overlay.
Flags: Read / Write
Default value: NULL
The “offset-x” property
“offset-x” gint
For positive value, horizontal offset of overlay image in pixels from left of video image. For negative value, horizontal offset of overlay image in pixels from right of video image.
Flags: Read / Write
Default value: 0
The “offset-y” property
“offset-y” gint
For positive value, vertical offset of overlay image in pixels from top of video image. For negative value, vertical offset of overlay image in pixels from bottom of video image.
Flags: Read / Write
Default value: 0
The “overlay-height” property
“overlay-height” gint
Height of overlay image in pixels (0 = same as overlay image).
Flags: Read / Write
Allowed values: >= 0
Default value: 0
The “overlay-width” property
“overlay-width” gint
Width of overlay image in pixels (0 = same as overlay image).
Flags: Read / Write
Allowed values: >= 0
Default value: 0
The “relative-x” property
“relative-x” gdouble
Horizontal offset of overlay image in fractions of video image width, from top-left corner of video image.
Flags: Read / Write
Allowed values: [0,1]
Default value: 0
The “relative-y” property
“relative-y” gdouble
Vertical offset of overlay image in fractions of video image height, from top-left corner of video image.
Flags: Read / Write
Allowed values: [0,1]
Default value: 0