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Showing content from https://gstreamer.freedesktop.org/documentation/opencv/opencvtextoverlay.html below:

opencvtextoverlay

opencvtextoverlay renders the text on top of the video frames

 gst-launch-1.0 videotestsrc ! videoconvert ! opencvtextoverlay text="Opencv Text Overlay " ! videoconvert ! xvimagesink

Authors: – sreerenj

Classification: – Filter/Effect/Video

Rank – none

Plugin – opencv

Package – GStreamer Bad Plug-ins

video/x-raw:
         format: RGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – sink

Object type – GstPad

video/x-raw:
         format: RGB
          width: [ 1, 2147483647 ]
         height: [ 1, 2147483647 ]
      framerate: [ 0/1, 2147483647/1 ]

Presence – always

Direction – src

Object type – GstPad

“colorB” gint

Sets the color -B

Flags : Read / Write

Default value : 0

“colorG” gint

Sets the color -G

Flags : Read / Write

Default value : 0

“colorR” gint

Sets the color -R

Flags : Read / Write

Default value : 0

“height” gdouble

Sets the height of fonts

Flags : Read / Write

Default value : 1

“text” gchararray

Text to be display.

Flags : Read / Write

Default value : Opencv Text Overlay

“thickness” gint

Sets the Thickness of Font

Flags : Read / Write

Default value : 2

“width” gdouble

Sets the width of fonts

Flags : Read / Write

Default value : 1

“xpos” gint

Sets the Horizontal position

Flags : Read / Write

Default value : 50

“ypos” gint

Sets the Vertical position

Flags : Read / Write

Default value : 50

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