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Properties
| gchar * | device | Read / Write |
| gint | device-fd | Read |
| gchar * | device-name | Read |
| GstV4l2DeviceTypeFlags | flags | Read |
| guint | overlay-height | Read / Write |
| gint | overlay-left | Read / Write |
| gint | overlay-top | Read / Write |
| guint | overlay-width | Read / Write |
| gint | brightness | Read / Write |
| gint | contrast | Read / Write |
| gint | hue | Read / Write |
| gint | saturation | Read / Write |
| guint | crop-height | Read / Write |
| gint | crop-left | Read / Write |
| gint | crop-top | Read / Write |
| guint | crop-width | Read / Write |
| GstV4l2IOMode | io-mode | Read / Write |
| V4L2_TV_norms | norm | Read / Write |
| GstStructure * | extra-controls | Read / Write |
| gboolean | force-aspect-ratio | Read / Write |
| gchar * | pixel-aspect-ratio | Read / Write |
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstBaseSink ╰── GstVideoSink ╰── GstV4l2Sink
Implemented Interfaces
GstV4l2Sink implements GstTuner, GstVideoOverlay, GstNavigation, GstColorBalance and GstVideoOrientation.
Description
v4l2sink can be used to display video to v4l2 devices (screen overlays provided by the graphics hardware, tv-out, etc)
Example launch lines
1 |
gst-launch-1.0 videotestsrc ! v4l2sink device=/dev/video1 |
1 |
gst-launch-1.0 -v videotestsrc ! navigationtest ! v4l2sink |
Synopsis
Element Pads
name |
sink |
direction |
sink |
presence |
always |
details |
image/jpeg |
| video/mpeg, mpegversion=(int)4, systemstream=(boolean)false | |
| video/mpeg, mpegversion=(int)2 | |
| video/mpegts, systemstream=(boolean)true | |
| video/x-bayer, format=(string){ bggr, gbrg, grbg, rggb }, width=(int)[ 1, 32768 ], height=(int)[ 1, 32768 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | |
| video/x-dv, systemstream=(boolean)true | |
| video/x-h263, variant=(string)itu | |
| video/x-h264, stream-format=(string){ byte-stream, avc }, alignment=(string)au | |
| video/x-pwc1, width=(int)[ 1, 32768 ], height=(int)[ 1, 32768 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | |
| video/x-pwc2, width=(int)[ 1, 32768 ], height=(int)[ 1, 32768 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | |
| video/x-raw, format=(string){ RGB16, BGR, RGB, GRAY8, GRAY16_LE, GRAY16_BE, YVU9, YV12, YUY2, YVYU, UYVY, Y42B, Y41B, YUV9, NV12_64Z32, NV24, NV61, NV16, NV21, NV12, I420, BGRA, BGRx, ARGB, xRGB, BGR15, RGB15 }, width=(int)[ 1, 32768 ], height=(int)[ 1, 32768 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | |
| video/x-sonix, width=(int)[ 1, 32768 ], height=(int)[ 1, 32768 ], framerate=(fraction)[ 0/1, 2147483647/1 ] | |
| video/x-vp8 | |
| video/x-wmv, wmvversion=(int)3, format=(string)WVC1 |
Property Details
The “device” property
“device” gchar *
Device location.
Flags: Read / Write
Default value: "/dev/video1"
The “device-fd” property
“device-fd” gint
File descriptor of the device.
Flags: Read
Allowed values: >= G_MAXULONG
Default value: -1
The “device-name” property
“device-name” gchar *
Name of the device.
Flags: Read
Default value: NULL
The “overlay-height” property
“overlay-height” guint
The height of the video overlay; default is equal to negotiated image height.
Flags: Read / Write
Default value: 0
The “overlay-left” property
“overlay-left” gint
The leftmost (x) coordinate of the video overlay; top left corner of screen is 0,0.
Flags: Read / Write
Default value: 0
The “overlay-top” property
“overlay-top” gint
The topmost (y) coordinate of the video overlay; top left corner of screen is 0,0.
Flags: Read / Write
Default value: 0
The “overlay-width” property
“overlay-width” guint
The width of the video overlay; default is equal to negotiated image width.
Flags: Read / Write
Default value: 0
The “brightness” property
“brightness” gint
Picture brightness, or more precisely, the black level.
Flags: Read / Write
Default value: 0
The “contrast” property
“contrast” gint
Picture contrast or luma gain.
Flags: Read / Write
Default value: 0
The “saturation” property
“saturation” gint
Picture color saturation or chroma gain.
Flags: Read / Write
Default value: 0
The “crop-height” property
“crop-height” guint
The height of the video crop; default is equal to negotiated image height.
Flags: Read / Write
Default value: 0
The “crop-left” property
“crop-left” gint
The leftmost (x) coordinate of the video crop; top left corner of image is 0,0.
Flags: Read / Write
Default value: 0
The “crop-top” property
“crop-top” gint
The topmost (y) coordinate of the video crop; top left corner of image is 0,0.
Flags: Read / Write
Default value: 0
The “crop-width” property
“crop-width” guint
The width of the video crop; default is equal to negotiated image width.
Flags: Read / Write
Default value: 0
The “io-mode” property
“io-mode” GstV4l2IOMode
I/O mode.
Flags: Read / Write
Default value: GST_V4L2_IO_AUTO
The “extra-controls” property
“extra-controls” GstStructure *
Extra v4l2 controls (CIDs) for the device.
Flags: Read / Write
The “force-aspect-ratio” property
“force-aspect-ratio” gboolean
When enabled, the pixel aspect ratio will be enforced.
Flags: Read / Write
Default value: TRUE
The “pixel-aspect-ratio” property
“pixel-aspect-ratio” gchar *
Overwrite the pixel aspect ratio of the device.
Flags: Read / Write
Default value: "1/1"