videomark

videomark — Marks a video signal with a pattern

Synopsis

                    GstVideoMark;

Object Hierarchy

  GObject
   +----GstObject
         +----GstElement
               +----GstBaseTransform
                     +----GstVideoFilter
                           +----GstVideoMark

Properties

  "enabled"                  gboolean              : Read / Write / Construct
  "pattern-count"            gint                  : Read / Write / Construct
  "pattern-data"             gint                  : Read / Write
  "pattern-data-count"       gint                  : Read / Write / Construct
  "pattern-height"           gint                  : Read / Write / Construct
  "pattern-width"            gint                  : Read / Write / Construct
  "bottom-offset"            gint                  : Read / Write / Construct
  "left-offset"              gint                  : Read / Write / Construct
  "pattern-data-uint64"      guint64               : Read / Write / Construct

Description

This plugin produces "pattern-count" squares in the bottom left corner of the video frames. The squares have a width and height of respectively "pattern-width" and "pattern-height". Even squares will be black and odd squares will be white.

After writing the pattern, "pattern-data-count" squares after the pattern squares are produced as the bitarray given in "pattern-data". 1 bits will produce white squares and 0 bits will produce black squares.

The element can be enabled with the "enabled" property. It is mostly used together with the GstVideoDetect plugin.

Example launch line

1
gst-launch videotestsrc ! videomark ! ximagesink
Add the default black/white squares at the bottom left of the video frames.

Last reviewed on 2007-06-01 (0.10.6)

Details

GstVideoMark

typedef struct _GstVideoMark GstVideoMark;

Opaque datastructure.

Property Details

The "enabled" property

  "enabled"                  gboolean              : Read / Write / Construct

Enable or disable the filter.

Default value: TRUE


The "pattern-count" property

  "pattern-count"            gint                  : Read / Write / Construct

The number of pattern markers.

Allowed values: >= 0

Default value: 4


The "pattern-data" property

  "pattern-data"             gint                  : Read / Write

The extra data pattern markers.

Allowed values: >= 0

Default value: 10


The "pattern-data-count" property

  "pattern-data-count"       gint                  : Read / Write / Construct

The number of extra data pattern markers.

Allowed values: [0,64]

Default value: 5


The "pattern-height" property

  "pattern-height"           gint                  : Read / Write / Construct

The height of the pattern markers.

Allowed values: >= 1

Default value: 16


The "pattern-width" property

  "pattern-width"            gint                  : Read / Write / Construct

The width of the pattern markers.

Allowed values: >= 1

Default value: 4


The "bottom-offset" property

  "bottom-offset"            gint                  : Read / Write / Construct

The offset from the bottom border where the pattern starts.

Allowed values: >= 0

Default value: 0


The "left-offset" property

  "left-offset"              gint                  : Read / Write / Construct

The offset from the left border where the pattern starts.

Allowed values: >= 0

Default value: 0


The "pattern-data-uint64" property

  "pattern-data-uint64"      guint64               : Read / Write / Construct

The extra data pattern markers.

Default value: 10

See Also

GstVideoDetect