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videoverlay: Don't mention gconf elements and add a sentence about playbin/playsink

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playbin/playsink now implement the video overlay interface
This commit is contained in:
Sebastian Dröge 2014-01-14 13:17:26 +01:00
parent 103bb93154
commit 335e6e888d
1 changed files with 12 additions and 8 deletions
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20
gst-libs/gst/video/videooverlay.c
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@ -99,18 +99,22 @@
* <title>Two basic usage scenarios</title>
* <para>
* There are two basic usage scenarios: in the simplest case, the application
* knows exactly what particular element is used for video output, which is
* usually the case when the application creates the videosink to use
* (e.g. #xvimagesink, #ximagesink, etc.) itself; in this case, the application
* can just create the videosink element, create and realize the window to
* render the video on and then call gst_video_overlay_set_window_handle() directly
* with the XID or native window handle, before starting up the pipeline.
* uses #playbin or #plasink or knows exactly what particular element is used
* for video output, which is usually the case when the application creates
* the videosink to use (e.g. #xvimagesink, #ximagesink, etc.) itself; in this
* case, the application can just create the videosink element, create and
* realize the window to render the video on and then
* call gst_video_overlay_set_window_handle() directly with the XID or native
* window handle, before starting up the pipeline.
* As #playbin and #playsink implement the video overlay interface and proxy
* it transparently to the actual video sink even if it is created later, this
* case also applies when using these elements.
* </para>
* <para>
* In the other and more common case, the application does not know in advance
* what GStreamer video sink element will be used for video output. This is
* usually the case when an element such as #autovideosink or #gconfvideosink
* is used. In this case, the video sink element itself is created
* usually the case when an element such as #autovideosink is used.
* In this case, the video sink element itself is created
* asynchronously from a GStreamer streaming thread some time after the
* pipeline has been started up. When that happens, however, the video sink
* will need to know right then whether to render onto an already existing