| Top | |
|
|
|
| guint | background-color | Read / Write |
| guint | foreground-color | Read / Write |
| gint | horizontal-speed | Read / Write |
| gboolean | is-live | Read / Write |
| gint | k0 | Read / Write |
| gint | kt | Read / Write |
| gint | kt2 | Read / Write |
| gint | kx | Read / Write |
| gint | kx2 | Read / Write |
| gint | kxt | Read / Write |
| gint | kxy | Read / Write |
| gint | ky | Read / Write |
| gint | ky2 | Read / Write |
| gint | kyt | Read / Write |
| GstVideoTestSrcPattern | pattern | Read / Write |
| gint64 | timestamp-offset | Read / Write |
| gint | xoffset | Read / Write |
| gint | yoffset | Read / Write |
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseSrc ╰── GstPushSrc ╰── GstVideoTestSrc
The videotestsrc element is used to produce test video data in a wide variety of formats. The video test data produced can be controlled with the "pattern" property.
1 |
gst-launch-1.0 -v videotestsrc pattern=snow ! video/x-raw,width=1280,height=720 ! autovideosink |
name |
src |
direction |
source |
presence |
always |
details |
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, NV16, NV61, NV24, GRAY8, GRAY16_BE, GRAY16_LE, v308, RGB16, BGR16, RGB15, BGR15, UYVP, A420, RGB8P, YUV9, YVU9, IYU1, ARGB64, AYUV64, r210, I420_10LE, I420_10BE, I422_10LE, I422_10BE, Y444_10LE, Y444_10BE, GBR, GBR_10LE, GBR_10BE, NV12_64Z32, A420_10LE, A420_10BE, A422_10LE, A422_10BE, A444_10LE, A444_10BE }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
| video/x-bayer, format=(string){ bggr, rggb, grbg, gbrg }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ] |
The test pattern to produce.
The Gamut pattern creates a checkerboard pattern of colors at the edge of the YCbCr gamut and nearby colors that are out of gamut. The pattern is divided into 4 regions: black, white, red, and blue. After conversion to RGB, the out-of-gamut colors should be converted to the same value as their in-gamut neighbors. If the checkerboard pattern is still visible after conversion, this indicates a faulty conversion. Image manipulation, such as adjusting contrast or brightness, can also cause the pattern to be visible.
The Zone Plate pattern is based on BBC R&D Report 1978/23, and can be used to test spatial frequency response of a system. This pattern generator is controlled by the xoffset and yoffset parameters and also by all the parameters starting with 'k'. The default parameters produce a grey pattern. Try 'videotestsrc pattern=zone-plate kx2=20 ky2=20 kt=1' to produce something interesting.
|
A standard SMPTE test pattern |
||
|
Random noise |
||
|
A black image |
||
|
A white image |
||
|
A red image |
||
|
A green image |
||
|
A blue image |
||
|
Checkers pattern (1px) |
||
|
Checkers pattern (2px) |
||
|
Checkers pattern (4px) |
||
|
Checkers pattern (8px) |
||
|
Circular pattern |
||
|
Alternate between black and white |
||
|
SMPTE test pattern (75% color bars) |
||
|
Zone plate |
||
|
Gamut checking pattern |
||
|
Chroma zone plate |
||
|
A solid color, defined by the “foreground-color” property |
||
|
Moving ball |
||
|
SMPTE test pattern (100% color bars) |
||
|
Bar with foreground color |
||
|
Pinwheel |
||
|
Spokes |
||
|
Gradient |
||
|
All colors |
“background-color” property“background-color” guint
Color to use for background color of some patterns. Default is black (0xff000000).
Flags: Read / Write
Default value: 4278190080
“foreground-color” property“foreground-color” guint
Color to use for solid-color pattern and foreground color of other patterns. Default is white (0xffffffff).
Flags: Read / Write
Default value: 4294967295
“horizontal-speed” property“horizontal-speed” gint
Scroll image number of pixels per frame (positive is scroll to the left).
Flags: Read / Write
Default value: 0
“is-live” property“is-live” gboolean
Whether to act as a live source.
Flags: Read / Write
Default value: FALSE
“k0” property“k0” gint
Zoneplate zero order phase, for generating plain fields or phase offsets.
Flags: Read / Write
Default value: 0
“kt” property“kt” gint
Zoneplate 1st order t phase, for generating phase rotation as a function of time.
Flags: Read / Write
Default value: 0
“kt2” property“kt2” gint
Zoneplate 2nd order t phase, t*t/256 cycles per picture.
Flags: Read / Write
Default value: 0
“kx” property“kx” gint
Zoneplate 1st order x phase, for generating constant horizontal frequencies.
Flags: Read / Write
Default value: 0
“kx2” property“kx2” gint
Zoneplate 2nd order x phase, normalised to kx2/256 cycles per horizontal pixel at width/2 from origin.
Flags: Read / Write
Default value: 0
“kxt” property“kxt” gint
Zoneplate x*t product phase, normalised to kxy/256 cycles per vertical pixel at width/2 from origin.
Flags: Read / Write
Default value: 0
“ky” property“ky” gint
Zoneplate 1st order y phase, for generating contant vertical frequencies.
Flags: Read / Write
Default value: 0
“ky2” property“ky2” gint
Zoneplate 2nd order y phase, normailsed to ky2/256 cycles per vertical pixel at height/2 from origin.
Flags: Read / Write
Default value: 0
“pattern” property“pattern” GstVideoTestSrcPattern
Type of test pattern to generate.
Flags: Read / Write
Default value: SMPTE 100% color bars
“timestamp-offset” property“timestamp-offset” gint64
An offset added to timestamps set on buffers (in ns).
Flags: Read / Write
Allowed values: >= 0
Default value: 0
“xoffset” property“xoffset” gint
Zoneplate 2nd order products x offset.
Flags: Read / Write
Default value: 0
“yoffset” property“yoffset” gint
Zoneplate 2nd order products y offset.
Flags: Read / Write
Default value: 0