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| <a href="#gst-plugins-bad-plugins-glimagesink.description" class="shortcut">Description</a></span> |
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| <a name="gst-plugins-bad-plugins-glimagesink"></a><div class="titlepage"></div> |
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| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-glimagesink.top_of_page"></a>glimagesink</span></h2> |
| <p>glimagesink</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gst-plugins-bad-plugins-glimagesink.description"></a><h2>Description</h2> |
| <p>glimagesink renders video frames to a drawable on a local or remote |
| display using OpenGL. This element can receive a Window ID from the |
| application through the VideoOverlay interface and will then render video |
| frames in this drawable. |
| If no Window ID was provided by the application, the element will |
| create its own internal window and render into it.</p> |
| <p>See the <a href="/usr/share/gtk-doc/html/gst-plugins-bad-libs-1.0GstGLDisplay.html#GstGLDisplay-struct"><span class="type">GstGLDisplay</span></a> documentation for a list of environment variables that |
| can override window/platform detection.</p> |
| <div class="refsect2"> |
| <a name="id-1.2.73.3.4"></a><h3>Scaling</h3> |
| <p> |
| Depends on the driver, OpenGL handles hardware accelerated |
| scaling of video frames. This means that the element will just accept |
| incoming video frames no matter their geometry and will then put them to the |
| drawable scaling them on the fly. Using the <a class="link" href="gst-plugins-bad-plugins-glimagesinkelement.html#GstGLImageSink--force-aspect-ratio" title="The “force-aspect-ratio” property"><span class="type">“force-aspect-ratio”</span></a> |
| property it is possible to enforce scaling with a constant aspect ratio, |
| which means drawing black borders around the video frame. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.73.3.5"></a><h3>Events</h3> |
| <p> |
| Through the gl thread, glimagesink handle some events coming from the drawable |
| to manage its appearance even when the data is not flowing (GST_STATE_PAUSED). |
| That means that even when the element is paused, it will receive expose events |
| from the drawable and draw the latest frame with correct borders/aspect-ratio. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.73.3.6"></a><h3>Examples</h3> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v videotestsrc <span class="gtkdoc opt">!</span> video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw <span class="gtkdoc opt">!</span> glimagesink</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| A pipeline to test hardware scaling. |
| No special opengl extension is used in this pipeline, that's why it should work |
| with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v videotestsrc <span class="gtkdoc opt">!</span> video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>format<span class="gtkdoc opt">=</span>I420 <span class="gtkdoc opt">!</span> glimagesink</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| A pipeline to test hardware scaling and hardware colorspace conversion. |
| When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1), |
| the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32 |
| through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4). |
| If your driver does not support GLSL but supports MESA_YCbCr extension then |
| the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically |
| made when loading the texture and therefore no framebuffer is used. |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v gltestsrc <span class="gtkdoc opt">!</span> glimagesink</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| A pipeline 100% OpenGL. |
| No special opengl extension is used in this pipeline, that's why it should work |
| with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>plugins<span class="gtkdoc opt">-</span>bas<span class="gtkdoc opt">/</span>tests<span class="gtkdoc opt">/</span>examples<span class="gtkdoc opt">/</span>gl<span class="gtkdoc opt">/</span>generic<span class="gtkdoc opt">/</span>cube</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| The graphic FPS scene can be greater than the input video FPS. |
| The graphic scene can be written from a client code through the |
| two glfilterapp properties. |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2>Synopsis</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.73.3.7.1"></a><h3>Element Information</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">plugin</span></p></td> |
| <td> |
| <a class="link" href="gst-plugins-bad-plugins-plugin-opengl.html#plugin-opengl">opengl</a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term">author</span></p></td> |
| <td>Matthew Waters <matthew@centricular.com></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">class</span></p></td> |
| <td>Sink/Video</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.73.3.7.2"></a><h3>Element Pads</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>video/x-raw(memory:GLMemory, meta:GstVideoOverlayComposition), format=(string){ RGBA, BGRA, RGBx, BGRx, ARGB, ABGR, xRGB, xBGR, RGB, BGR, RGB16, BGR16, AYUV, I420, YV12, NV12, NV21, YUY2, UYVY, Y41B, Y42B, Y444, GRAY8, GRAY16_LE, GRAY16_BE }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> video/x-raw(memory:SystemMemory, meta:GstVideoOverlayComposition), format=(string){ RGBA, BGRA, RGBx, BGRx, ARGB, ABGR, xRGB, xBGR, RGB, BGR, RGB16, BGR16, AYUV, I420, YV12, NV12, NV21, YUY2, UYVY, Y41B, Y42B, Y444, GRAY8, GRAY16_LE, GRAY16_BE }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> video/x-raw(meta:GstVideoGLTextureUploadMeta, meta:GstVideoOverlayComposition), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> video/x-raw(memory:GLMemory), format=(string){ RGBA, BGRA, RGBx, BGRx, ARGB, ABGR, xRGB, xBGR, RGB, BGR, RGB16, BGR16, AYUV, I420, YV12, NV12, NV21, YUY2, UYVY, Y41B, Y42B, Y444, GRAY8, GRAY16_LE, GRAY16_BE }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> video/x-raw, format=(string){ RGBA, BGRA, RGBx, BGRx, ARGB, ABGR, xRGB, xBGR, RGB, BGR, RGB16, BGR16, AYUV, I420, YV12, NV12, NV21, YUY2, UYVY, Y41B, Y42B, Y444, GRAY8, GRAY16_LE, GRAY16_BE }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> video/x-raw(meta:GstVideoGLTextureUploadMeta), format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-bad-plugins-glimagesink.functions_details"></a><h2>Functions</h2> |
| <p></p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-bad-plugins-glimagesink.other_details"></a><h2>Types and Values</h2> |
| </div> |
| </div> |
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