gstreamer/docs/libs/GESVideoTestSource-children-props.md

#### `alpha`

alpha of the stream

Value type: #gdouble

#### `background-color`

Background color to use (big-endian ARGB)

Value type: #guint

See #videotestsrc:background-color

#### `fields`

Fields to use for deinterlacing

Valid values:
  - **All fields** (0) – all
  - **Top fields only** (1) – top
  - **Bottom fields only** (2) – bottom
  - **Automatically detect** (3) – auto

See #deinterlace:fields

#### `font-desc`

Pango font description of font to be used for rendering. See documentation of
pango_font_description_from_string for syntax.

Value type: #gchararray

See #timeoverlay:font-desc

#### `foreground-color`

Foreground color to use (big-endian ARGB)

Value type: #guint

See #videotestsrc:foreground-color

#### `halignment`

Horizontal alignment of the text

Valid values:
  - **left** (0) – left
  - **center** (1) – center
  - **right** (2) – right
  - **position** (4) – Absolute position clamped to canvas
  - **absolute** (5) – Absolute position

See #timeoverlay:halignment

#### `height`

height of the source

Value type: #gint

#### `mode`

Deinterlace Mode

Valid values:
  - **Auto detection (best effort)** (0) – auto
  - **Force deinterlacing** (1) – interlaced
  - **Run in passthrough mode** (2) – disabled
  - **Auto detection (strict)** (3) – auto-strict

See #deinterlace:mode

#### `pattern`

Type of test pattern to generate

Valid values:
  - **SMPTE 100% color bars** (0) – smpte
  - **Random (television snow)** (1) – snow
  - **100% Black** (2) – black
  - **100% White** (3) – white
  - **Red** (4) – red
  - **Green** (5) – green
  - **Blue** (6) – blue
  - **Checkers 1px** (7) – checkers-1
  - **Checkers 2px** (8) – checkers-2
  - **Checkers 4px** (9) – checkers-4
  - **Checkers 8px** (10) – checkers-8
  - **Circular** (11) – circular
  - **Blink** (12) – blink
  - **SMPTE 75% color bars** (13) – smpte75
  - **Zone plate** (14) – zone-plate
  - **Gamut checkers** (15) – gamut
  - **Chroma zone plate** (16) – chroma-zone-plate
  - **Solid color** (17) – solid-color
  - **Moving ball** (18) – ball
  - **SMPTE 100% color bars** (19) – smpte100
  - **Bar** (20) – bar
  - **Pinwheel** (21) – pinwheel
  - **Spokes** (22) – spokes
  - **Gradient** (23) – gradient
  - **Colors** (24) – colors

See #videotestsrc:pattern

#### `posx`

x position of the stream

Value type: #gint

#### `posy`

y position of the stream

Value type: #gint

#### `text-width`

Resulting width of font rendering

Value type: #guint

See #timeoverlay:text-width

#### `text-x`

Resulting X position of font rendering.

Value type: #gint

See #timeoverlay:text-x

#### `text-y`

Resulting X position of font rendering.

Value type: #gint

See #timeoverlay:text-y

#### `tff`

Deinterlace top field first

Valid values:
  - **Auto detection** (0) – auto
  - **Top field first** (1) – tff
  - **Bottom field first** (2) – bff

See #deinterlace:tff

#### `time-mode`

What time to show

Valid values:
  - **buffer-time** (0) – buffer-time
  - **stream-time** (1) – stream-time
  - **running-time** (2) – running-time
  - **time-code** (3) – time-code

See #timeoverlay:time-mode

#### `use-time-overlay`

Use time overlay, setting a child property corresponding toGstTimeOverlay will
switch this on by default.

Value type: #gboolean

See #GESVideoTestSource:use-time-overlay

#### `valignment`

Vertical alignment of the text

Valid values:
  - **baseline** (0) – baseline
  - **bottom** (1) – bottom
  - **top** (2) – top
  - **position** (3) – Absolute position clamped to canvas
  - **center** (4) – center
  - **absolute** (5) – Absolute position

See #timeoverlay:valignment

#### `video-direction`

Video direction: rotation and flipping

Valid values:
  - **GST_VIDEO_ORIENTATION_IDENTITY** (0) – identity
  - **GST_VIDEO_ORIENTATION_90R** (1) – 90r
  - **GST_VIDEO_ORIENTATION_180** (2) – 180
  - **GST_VIDEO_ORIENTATION_90L** (3) – 90l
  - **GST_VIDEO_ORIENTATION_HORIZ** (4) – horiz
  - **GST_VIDEO_ORIENTATION_VERT** (5) – vert
  - **GST_VIDEO_ORIENTATION_UL_LR** (6) – ul-lr
  - **GST_VIDEO_ORIENTATION_UR_LL** (7) – ur-ll
  - **GST_VIDEO_ORIENTATION_AUTO** (8) – auto
  - **GST_VIDEO_ORIENTATION_CUSTOM** (9) – custom

See #videoflip:video-direction

#### `width`

width of the source

Value type: #gint