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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>videotestsrc: GStreamer Base Plugins 1.0 Plugins Reference Manual</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual">
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<link rel="up" href="ch01.html" title="gst-plugins-base Elements">
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<link rel="prev" href="gst-plugins-base-plugins-videoscale.html" title="videoscale">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Top  | 
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                  Description  | 
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                  Object Hierarchy  | 
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                  Properties
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Home
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Up
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Prev
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Next
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videotestsrc
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videotestsrc
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Properties
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guint
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background-color
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Read / Write
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guint
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foreground-color
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Read / Write
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gint
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horizontal-speed
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Read / Write
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gboolean
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is-live
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Read / Write
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gint
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k0
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Read / Write
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gint
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kt
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Read / Write
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gint
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kt2
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Read / Write
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gint
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kx
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Read / Write
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gint
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kx2
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Read / Write
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gint
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kxt
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Read / Write
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gint
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kxy
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Read / Write
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gint
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ky
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Read / Write
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gint
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ky2
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Read / Write
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gint
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kyt
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Read / Write
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GstVideoTestSrcPattern
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pattern
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Read / Write
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gint64
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timestamp-offset
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Read / Write
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gint
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xoffset
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Read / Write
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gint
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yoffset
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Read / Write
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GstVideoTestSrcAnimationMode
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animation-mode
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Read / Write
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gboolean
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flip
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Read / Write
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GstVideoTestSrcMotionType
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motion
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Read / Write
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Types and Values
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struct
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GstVideoTestSrc
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enum
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GstVideoTestSrcPattern
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Object Hierarchy
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    GObject
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    ╰── GInitiallyUnowned
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        ╰── GstObject
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            ╰── GstElement
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                ╰── GstBaseSrc
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                    ╰── GstPushSrc
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                        ╰── GstVideoTestSrc
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Description
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The videotestsrc element is used to produce test video data in a wide variety
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of formats. The video test data produced can be controlled with the "pattern"
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property.
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By default the videotestsrc will generate data indefinitely, but if the
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“num-buffers” property is non-zero it will instead generate a
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fixed number of video frames and then send EOS.
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Example launch line
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1
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gst-launch-1.0 -v videotestsrc pattern=snow ! video/x-raw,width=1280,height=720 ! autovideosink
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 Shows random noise in a video window.
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Synopsis
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Element Information
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plugin
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            videotestsrc
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author
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David A. Schleef <ds@schleef.org>
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class
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Source/Video
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Element Pads
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name
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src
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direction
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source
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presence
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always
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details
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video/x-raw, format=(string){ I420, YV12, YUY2, UYVY, AYUV, RGBx, BGRx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, Y41B, Y42B, YVYU, Y444, v210, v216, NV12, NV21, GRAY8, GRAY16_BE, GRAY16_LE, v308, RGB16, BGR16, RGB15, BGR15, UYVP, A420, RGB8P, YUV9, YVU9, IYU1, ARGB64, AYUV64, r210, I420_10BE, I420_10LE, I422_10BE, I422_10LE, Y444_10BE, Y444_10LE, GBR, GBR_10BE, GBR_10LE, NV16, NV24, NV12_64Z32, A420_10BE, A420_10LE, A422_10BE, A422_10LE, A444_10BE, A444_10LE, NV61, P010_10BE, P010_10LE, IYU2, VYUY, GBRA, GBRA_10BE, GBRA_10LE, GBR_12BE, GBR_12LE, GBRA_12BE, GBRA_12LE, I420_12BE, I420_12LE, I422_12BE, I422_12LE, Y444_12BE, Y444_12LE, GRAY10_LE32, NV12_10LE32, NV16_10LE32 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], multiview-mode=(string){ mono, left, right }
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 video/x-bayer, format=(string){ bggr, rggb, grbg, gbrg }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ], multiview-mode=(string){ mono, left, right }
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Functions
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Types and Values
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struct GstVideoTestSrc
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struct GstVideoTestSrc;
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Opaque data structure.
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enum GstVideoTestSrcPattern
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The test pattern to produce.
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The Gamut pattern creates a checkerboard pattern of colors at the
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edge of the YCbCr gamut and nearby colors that are out of gamut.
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The pattern is divided into 4 regions: black, white, red, and blue.
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After conversion to RGB, the out-of-gamut colors should be converted
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to the same value as their in-gamut neighbors.  If the checkerboard
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pattern is still visible after conversion, this indicates a faulty
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conversion.  Image manipulation, such as adjusting contrast or
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brightness, can also cause the pattern to be visible.
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The Zone Plate pattern is based on BBC R&D Report 1978/23, and can
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be used to test spatial frequency response of a system.  This
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pattern generator is controlled by the xoffset and yoffset parameters
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and also by all the parameters starting with 'k'.  The default
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parameters produce a grey pattern.  Try 'videotestsrc
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pattern=zone-plate kx2=20 ky2=20 kt=1' to produce something
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interesting.
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Members
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GST_VIDEO_TEST_SRC_SMPTE
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A standard SMPTE test pattern
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GST_VIDEO_TEST_SRC_SNOW
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Random noise
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GST_VIDEO_TEST_SRC_BLACK
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A black image
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GST_VIDEO_TEST_SRC_WHITE
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A white image
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GST_VIDEO_TEST_SRC_RED
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A red image
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GST_VIDEO_TEST_SRC_GREEN
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A green image
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GST_VIDEO_TEST_SRC_BLUE
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A blue image
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GST_VIDEO_TEST_SRC_CHECKERS1
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Checkers pattern (1px)
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GST_VIDEO_TEST_SRC_CHECKERS2
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Checkers pattern (2px)
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GST_VIDEO_TEST_SRC_CHECKERS4
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Checkers pattern (4px)
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GST_VIDEO_TEST_SRC_CHECKERS8
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Checkers pattern (8px)
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GST_VIDEO_TEST_SRC_CIRCULAR
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Circular pattern
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GST_VIDEO_TEST_SRC_BLINK
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Alternate between black and white
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GST_VIDEO_TEST_SRC_SMPTE75
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SMPTE test pattern (75% color bars)
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GST_VIDEO_TEST_SRC_ZONE_PLATE
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Zone plate
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GST_VIDEO_TEST_SRC_GAMUT
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Gamut checking pattern
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GST_VIDEO_TEST_SRC_CHROMA_ZONE_PLATE
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Chroma zone plate
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GST_VIDEO_TEST_SRC_SOLID
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A solid color, defined by the
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“foreground-color” property
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GST_VIDEO_TEST_SRC_BALL
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Moving ball
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GST_VIDEO_TEST_SRC_SMPTE100
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SMPTE test pattern (100% color bars)
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GST_VIDEO_TEST_SRC_BAR
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Bar with foreground color
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GST_VIDEO_TEST_SRC_PINWHEEL
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Pinwheel
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GST_VIDEO_TEST_SRC_SPOKES
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Spokes
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GST_VIDEO_TEST_SRC_GRADIENT
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Gradient
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GST_VIDEO_TEST_SRC_COLORS
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All colors
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Property Details
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The “background-color” property
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  “background-color”         guint
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Color to use for background color of some patterns.  Default is
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black (0xff000000).
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Flags: Read / Write
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Default value: 4278190080
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The “foreground-color” property
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  “foreground-color”         guint
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Color to use for solid-color pattern and foreground color of other
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patterns.  Default is white (0xffffffff).
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Flags: Read / Write
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Default value: 4294967295
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The “horizontal-speed” property
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  “horizontal-speed”         gint
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Scroll image number of pixels per frame (positive is scroll to the left).
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Flags: Read / Write
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Default value: 0
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The “is-live” property
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  “is-live”                  gboolean
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Whether to act as a live source.
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Flags: Read / Write
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Default value: FALSE
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The “k0” property
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  “k0”                       gint
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Zoneplate zero order phase, for generating plain fields or phase offsets.
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Flags: Read / Write
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Default value: 0
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The “kt” property
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  “kt”                       gint
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Zoneplate 1st order t phase, for generating phase rotation as a function of time.
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Flags: Read / Write
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Default value: 0
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The “kt2” property
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  “kt2”                      gint
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Zoneplate 2nd order t phase, t*t/256 cycles per picture.
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Flags: Read / Write
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Default value: 0
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The “kx” property
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  “kx”                       gint
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Zoneplate 1st order x phase, for generating constant horizontal frequencies.
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Flags: Read / Write
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Default value: 0
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The “kx2” property
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  “kx2”                      gint
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Zoneplate 2nd order x phase, normalised to kx2/256 cycles per horizontal pixel at width/2 from origin.
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Flags: Read / Write
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Default value: 0
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The “kxt” property
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  “kxt”                      gint
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Zoneplate x*t product phase, normalised to kxy/256 cycles per vertical pixel at width/2 from origin.
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Flags: Read / Write
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Default value: 0
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The “kxy” property
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  “kxy”                      gint
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Zoneplate x*y product phase.
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Flags: Read / Write
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Default value: 0
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The “ky” property
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  “ky”                       gint
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Zoneplate 1st order y phase, for generating contant vertical frequencies.
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Flags: Read / Write
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Default value: 0
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The “ky2” property
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  “ky2”                      gint
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Zoneplate 2nd order y phase, normailsed to ky2/256 cycles per vertical pixel at height/2 from origin.
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Flags: Read / Write
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Default value: 0
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The “kyt” property
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  “kyt”                      gint
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Zoneplate y*t product phase.
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Flags: Read / Write
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Default value: 0
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The “pattern” property
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  “pattern”                  GstVideoTestSrcPattern
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Type of test pattern to generate.
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Flags: Read / Write
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Default value: SMPTE 100% color bars
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The “timestamp-offset” property
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  “timestamp-offset”         gint64
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An offset added to timestamps set on buffers (in ns).
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Flags: Read / Write
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Allowed values: >= 0
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Default value: 0
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The “xoffset” property
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  “xoffset”                  gint
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Zoneplate 2nd order products x offset.
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Flags: Read / Write
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Default value: 0
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The “yoffset” property
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  “yoffset”                  gint
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Zoneplate 2nd order products y offset.
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Flags: Read / Write
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Default value: 0
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The “animation-mode” property
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  “animation-mode”           GstVideoTestSrcAnimationMode
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For pattern=ball, which counter defines the position of the ball.
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Flags: Read / Write
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Default value: frame count
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The “flip” property
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  “flip”                     gboolean
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For pattern=ball, invert colors every second.
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Flags: Read / Write
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Default value: FALSE
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The “motion” property
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  “motion”                   GstVideoTestSrcMotionType
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For pattern=ball, what motion the ball does.
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Flags: Read / Write
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Default value: Ball waves back and forth, up and down
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Packit 971217
Packit 971217 
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Packit 971217 
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Packit 971217 
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