Element adding text overlay to raw video frames - using 'drawtext' video filter from FFmpeg Library. (https://ffmpeg.org/ffmpeg-filters.html#drawtext-1). Element allows for specifying most commonly used 'drawtext' settings (such as fontsize, fontcolor) through element options.

The element expects each frame to be received in a separate buffer. Additionally, the element has to receive proper stream format with picture format and dimensions.

Element options

Passed via struct Membrane.FFmpeg.VideoFilter.TextOverlay.t/0

• text

  any

  Default value: nil
  Text to be displayed on video. Either text or text_intervals must be provided

• text_intervals

  [{{Time.t(), Time.t() | :infinity}, String.t()}]

  Default value: []
  List of time intervals when each given text should appear. Intervals should not overlap.

              Either text or text_intervals must be provided

• font_size

  any

  Default value: 12
  Size of the displayed font

• font_color

  any

  Default value: "black"
  Choose font color according to the ffmpeg color syntax (https://ffmpeg.org/ffmpeg-utils.html#color-syntax)

• font_file

  any

  Default value: nil
  Path to the file with the desired font. If not set, default font fallback from fontconfig is used

• box?

  any

  Default value: false
  Set to true if a box is to be displayed behind the text

• box_color

  any

  Default value: "white"
  If the box? is set to true, display a box in the given color

• border_width

  any

  Default value: 0
  Set the width of the border around the text

• border_color

  any

  Default value: "black"
  Set the color of the border, if exists

• horizontal_align

  :left | :right | :center

  Default value: :left
  Horizontal position of the displayed text

• vertical_align

  :top | :bottom | :center

  Default value: :bottom
  Vertical position of the displayed text

Pads

:input

Accepted formats:

%RawVideo{aligned: true}

:output

Accepted formats:

%RawVideo{aligned: true}