qroverlay

Element to set random data on a qroverlay.

Example launch line

gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE

Since 1.22 the qroverlay element also supports a GstCustomMeta called GstQROverlayMeta which allows upstream elements to set the data to be rendered on the buffers that flow through it. This custom meta GstStructure has the following fields:

  • gchar* data (mandatory): The data to use to render the qrcode.
  • gboolean keep_data (mandatory): Set to TRUE if the data from that metadata should be used as data

Hierarchy

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstVideoFilter
                        ╰──GstBaseQROverlay
                            ╰──qroverlay

Factory details

Authors: – Thibault Saunier

Classification: – Qrcode overlay containing random data

Rank – none

Plugin – qroverlay

Package – GStreamer Bad Plug-ins

Pad Templates

sink

video/x-raw:
         format: { I420 }
      framerate: [ 0/1, 2147483647/1 ]
          width: [ 16, 2147483647 ]
         height: [ 16, 2147483647 ]

Presence – always

Direction – sink

Object type – GstPad

src

video/x-raw:
         format: { I420 }
      framerate: [ 0/1, 2147483647/1 ]
          width: [ 16, 2147483647 ]
         height: [ 16, 2147483647 ]

Presence – always

Direction – src

Object type – GstPad

Properties

data 

“data” gchararray

Data to write in the QRCode to be overlaid

Flags : Read / Write

Default value : NULL

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