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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>videoscale: 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-videorate.html" title="videorate">
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<link rel="next" href="gst-plugins-base-plugins-videotestsrc.html" title="videotestsrc">
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<meta name="generator" content="GTK-Doc V1.27 (XML mode)">
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<link rel="stylesheet" href="style.css" type="text/css">
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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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videoscale
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videoscale
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Properties
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gboolean
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add-borders
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Read / Write
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gboolean
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dither
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Read / Write / Construct
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gdouble
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envelope
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Read / Write / Construct
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GstVideoScaleMethod
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method
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Read / Write
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gdouble
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sharpen
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Read / Write / Construct
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gdouble
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sharpness
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Read / Write / Construct
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gboolean
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gamma-decode
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Read / Write / Construct
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guint
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n-threads
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Read / Write / Construct
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Types and Values
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struct
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GstVideoScale
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enum
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GstVideoScaleMethod
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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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╰── GstBaseTransform
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╰── GstVideoFilter
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╰── GstVideoScale
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Description
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This element resizes video frames. By default the element will try to
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negotiate to the same size on the source and sinkpad so that no scaling
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is needed. It is therefore safe to insert this element in a pipeline to
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get more robust behaviour without any cost if no scaling is needed.
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This element supports a wide range of color spaces including various YUV and
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RGB formats and is therefore generally able to operate anywhere in a
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pipeline.
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Example pipelines
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1
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gst-launch-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! autovideosink
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Decode an Ogg/Theora and display the video. If the video sink chosen
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cannot perform scaling, the video scaling will be performed by videoscale
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when you resize the video window.
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To create the test Ogg/Theora file refer to the documentation of theoraenc.
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1
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gst-launch-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! video/x-raw,width=100 ! autovideosink
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Decode an Ogg/Theora and display the video with a width of 100.
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Synopsis
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Element Information
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plugin
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videoscale
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author
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Wim Taymans <wim.taymans@gmail.com>
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class
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Filter/Converter/Video/Scaler
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Element Pads
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name
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sink
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direction
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sink
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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, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/1, 2147483647/1 ]
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video/x-raw(ANY), 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, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/1, 2147483647/1 ]
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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, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/1, 2147483647/1 ]
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video/x-raw(ANY), 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, 32767 ], height=(int)[ 1, 32767 ], framerate=(fraction)[ 0/1, 2147483647/1 ]
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Functions
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Types and Values
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struct GstVideoScale
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struct GstVideoScale;
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Opaque data structure
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enum GstVideoScaleMethod
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The videoscale method to use.
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Members
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GST_VIDEO_SCALE_NEAREST
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use nearest neighbour scaling (fast and ugly)
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GST_VIDEO_SCALE_BILINEAR
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use 2-tap bilinear scaling (slower but prettier).
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GST_VIDEO_SCALE_4TAP
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use a 4-tap sinc filter for scaling (slow).
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GST_VIDEO_SCALE_LANCZOS
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use a multitap Lanczos filter for scaling (slow).
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GST_VIDEO_SCALE_BILINEAR2
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use a multitap bilinear filter
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GST_VIDEO_SCALE_SINC
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use a multitap sinc filter
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GST_VIDEO_SCALE_HERMITE
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use a multitap bicubic Hermite filter
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971217 |
GST_VIDEO_SCALE_SPLINE
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use a multitap bicubic spline filter
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GST_VIDEO_SCALE_CATROM
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use a multitap bicubic Catmull-Rom filter
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GST_VIDEO_SCALE_MITCHELL
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use a multitap bicubic Mitchell filter
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Property Details
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The “add-borders” property
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“add-borders” gboolean
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Add black borders if necessary to keep the display aspect ratio.
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Flags: Read / Write
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Default value: TRUE
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The “dither” property
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“dither” gboolean
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Add dither (only used for Lanczos method).
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Flags: Read / Write / Construct
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Default value: FALSE
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The “envelope” property
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“envelope” gdouble
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Size of filter envelope.
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Flags: Read / Write / Construct
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Allowed values: [1,5]
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Default value: 2
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The “method” property
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“method” GstVideoScaleMethod
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method.
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Flags: Read / Write
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Default value: Bilinear (2-tap)
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The “sharpen” property
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“sharpen” gdouble
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Sharpening.
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Flags: Read / Write / Construct
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Allowed values: [0,1]
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Default value: 0
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The “sharpness” property
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“sharpness” gdouble
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|
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Sharpness of filter.
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|
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971217 |
Flags: Read / Write / Construct
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971217 |
Allowed values: [0.5,1.5]
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Default value: 1
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The “gamma-decode” property
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“gamma-decode” gboolean
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Decode gamma before scaling.
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Flags: Read / Write / Construct
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Default value: FALSE
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The “n-threads” property
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“n-threads” guint
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Maximum number of threads to use.
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Flags: Read / Write / Construct
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Default value: 1
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See Also
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videorate, videoconvert
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Generated by GTK-Doc V1.27
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