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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>textrender: 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-textoverlay.html" title="textoverlay">
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<link rel="next" href="gst-plugins-base-plugins-theoradec.html" title="theoradec">
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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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textrender
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textrender
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Properties
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gchar *
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font-desc
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Write
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GstTextRenderHAlign
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halignment
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Read / Write
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GstTextRenderLineAlign
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line-alignment
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Read / Write
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GstTextRenderVAlign
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valignment
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Read / Write
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gint
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xpad
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Read / Write
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gint
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ypad
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Read / Write
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Types and Values
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struct
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GstTextRender
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enum
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GstTextRenderHAlign
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enum
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GstTextRenderLineAlign
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enum
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GstTextRenderVAlign
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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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╰── GstTextRender
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Description
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This plugin renders text received on the text sink pad to a video
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buffer (retaining the alpha channel), so it can later be overlayed
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on top of video streams using other elements.
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The text can contain newline characters. (FIXME: What about text
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wrapping? It does not make sense in this context)
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Example launch lines
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1
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gst-launch-1.0 -v filesrc location=subtitles.srt ! subparse ! textrender ! videoconvert ! autovideosink
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Synopsis
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Element Information
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plugin
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pango
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author
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David Schleef <ds@schleef.org>, GStreamer maintainers <gstreamer-devel@lists.freedesktop.org>
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class
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Filter/Editor/Video
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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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text/x-raw, format=(string){ pango-markup, utf8 }
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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){ AYUV, ARGB }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]
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Functions
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Types and Values
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struct GstTextRender
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struct GstTextRender;
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Opaque textrender data structure.
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enum GstTextRenderHAlign
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Horizontal alignment of the text.
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Members
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GST_TEXT_RENDER_HALIGN_LEFT
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align text left
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GST_TEXT_RENDER_HALIGN_CENTER
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align text center
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GST_TEXT_RENDER_HALIGN_RIGHT
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align text right
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enum GstTextRenderLineAlign
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Alignment of text lines relative to each other
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Members
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GST_TEXT_RENDER_LINE_ALIGN_LEFT
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lines are left-aligned
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GST_TEXT_RENDER_LINE_ALIGN_CENTER
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lines are center-aligned
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GST_TEXT_RENDER_LINE_ALIGN_RIGHT
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lines are right-aligned
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enum GstTextRenderVAlign
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Vertical alignment of the text.
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Members
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GST_TEXT_RENDER_VALIGN_BASELINE
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draw text on the baseline
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GST_TEXT_RENDER_VALIGN_BOTTOM
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draw text on the bottom
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GST_TEXT_RENDER_VALIGN_TOP
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draw test on top
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Property Details
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The “font-desc” property
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“font-desc” gchar *
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Pango font description of font to be used for rendering. See documentation of pango_font_description_from_string for syntax.
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Flags: Write
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Default value: ""
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The “halignment” property
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“halignment” GstTextRenderHAlign
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Horizontal alignment of the text.
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Flags: Read / Write
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Default value: center
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The “line-alignment” property
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“line-alignment” GstTextRenderLineAlign
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Alignment of text lines relative to each other.
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Flags: Read / Write
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Default value: center
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The “valignment” property
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“valignment” GstTextRenderVAlign
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Vertical alignment of the text.
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Flags: Read / Write
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Default value: baseline
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The “xpad” property
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“xpad” gint
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Horizontal paddding when using left/right alignment.
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Flags: Read / Write
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Allowed values: >= 0
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Default value: 25
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The “ypad” property
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“ypad” gint
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Vertical padding when using top/bottom alignment.
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Flags: Read / Write
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Allowed values: >= 0
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Default value: 25
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See Also
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GstTextOverlay
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