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docs: Clarify the distinction between Tracks and Layers

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Jean-François Fortin Tam 2013-02-10 12:07:48 -05:00 committed by Thibault Saunier
parent 04b1ef6eb7
commit edd45bba78
1 changed files with 16 additions and 20 deletions
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36
docs/libs/architecture.xml
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@ -66,20 +66,28 @@
<para>The <classname>GESTimeline</classname> is a
<classname>GstElement</classname>. It can therefore be used in any
GStreamer pipeline like any other object.</para>
</refsect2>
<refsect2>
<title>Tracks and Layers</title>
<para>The GESTimeline can contain two types of objects (seen in <xref
linkend="layer_tracks_diagram" />): <itemizedlist>
<listitem>
<para>Layers - Corresponds to the user-visible layout of
non-overlapping objects. A minimalistic timeline would only have
one layer. A more complex editing application could use as many as
needed.</para>
<para>Layers - Corresponds to the user-visible arrangement of clips,
and what you primarily interact with as an application developer.
A minimalistic timeline would only have one layer,
but a more complex editing application could use as many as needed.
</para>
</listitem>
<listitem>
<para>Tracks - Corresponds to the output stream formats. A typical
GESTimeline would have a audio track and a video track. An audio
editor would only require one single audio Track.</para>
<para>Tracks - Corresponds to the output streams in GStreamer.
A typical GESTimeline, aimed at a video editing application, would
have an audio track and a video track.
A GESTimeline for an audio editing application would only require
an audio track. Multiple layers can be related to each track.</para>
</listitem>
</itemizedlist></para>
@ -94,22 +102,10 @@
</figure>
<para>In order to reduce even more the amount of GStreamer interaction
the application developer has to deal with , a convenience GstPipeline
the application developer has to deal with, a convenience GstPipeline
has been made available specifically for Timelines : <link
linkend="GESTimelinePipeline">GESTimelinePipeline</link>.</para>
</refsect2>
<refsect2>
<title>Timeline layers</title>
<para>The layers are the end-user visible part of GES.</para>
</refsect2>
<refsect2>
<title>Timeline Tracks</title>
<para>The tracks are the GStreamer-level components of a Timeline. They
are a 1-to-1 relationship to the output streams.</para>
</refsect2>
</refsect1>
</refentry>