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Teletext documentation

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24604 b3059339-0415-0410-9bf9-f77b7e298cf2
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voroshil 2007-09-24 17:18:55 +00:00
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DOCS/xml/en/tvinput.xml
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@ -185,4 +185,95 @@ to a hardware limitation.
</sect2>
</sect1>
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
<sect1 id="tv-teletext">
<title>Teletext</title>
<para>
Teletext is currently available only in MPlayer for v4l and v4l2 drivers.
</para>
<sect2 id="tv-teletext-implementation-notes">
<title>Implementation notes</title>
<para>
<application>MPlayer</application> supports regular text, graphics and navigation links.
Unfortunately, colored pages are not fully supported yet - all pages are shown as grayscaled.
Subtitle pages (also known as Closed Captions) are supported, too.
</para>
<para>
<application>MPlayer</application> starts caching all teletext pages upon
starting to receive TV input, so you do not need to wait until the requested page is loaded.
</para>
<para>
Note: Using teletext with <option>-vo xv</option> causes strange colors.
</para>
</sect2>
<sect2 id="tv-teletext-usage">
<title>Using teletext</title>
<para>
To enable teletext decoding you must specify the VBI device to get teletext data
from (usually <filename>/dev/vbi0</filename> for Linux). This can be done by specifying
<option>tdevice</option> in your configuration file, like shown below:
<screen>tv=tdevice=/dev/vbi0</screen>
</para>
<para>
You might need to specify the teletext language code for your country.
To list all available country codes use
<screen>tv=tdevice=/dev/vbi0:tlang=<replaceable>-1</replaceable></screen>
Here is an example for Russian:
<screen>tv=tdevice=/dev/vbi0:tlang=<replaceable>33</replaceable></screen>
</para>
<para>
</para>
</sect2>
<sect2 id="tv-teletext-hotkeys">
<title>Teletext hot keys</title>
<informaltable frame="all">
<tgroup cols="2">
<thead>
<row>
<entry>Key</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>X</entry>
<entry>Switch teletext display on/off</entry>
</row>
<row>
<entry>C</entry>
<entry>Cycle through teletext rendering modes (opaque, transparent, inverted opaque,
inverted transparent</entry>
</row>
<row>
<entry>Left/Right</entry>
<entry>Go to previous/next teletext page</entry>
</row>
<row>
<entry>PageUp/PageDown</entry>
<entry>Go to next/previous teletext subpage</entry>
</row>
<row>
<entry>digits</entry>
<entry>Enter teletext page number to jump to</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</sect2>
</sect1>
</chapter>