<commit_before><?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % BOOK_ENTITIES SYSTEM "AppStream.ent">
%BOOK_ENTITIES;
]>

<section id="sect-Metadata-Codec">
	<title>Fonts</title>

	<section id="spec-codecdata-introduction">
		<title>Introduction</title>
		<para>
			Software centers might want to special-case codec handling. Therefore, we provide a component type for them.
		</para>
		<para>
			Codecs can ship one or more files in <filename>/usr/share/appdata/%{id}.metainfo.xml</filename>.
		</para>
		<para>
			Codec metadata files can - just likle all other metainfo files - be translated. See the section about translation for more information about that.
		</para>
	</section>

	<section id="spec-codecdata-example">
		<title>Example file</title>
		<para>
			A codec meta-info file should look like this:
		</para>
		<programlisting language="XML">
<![CDATA[<?xml version="1.0" encoding="UTF-8"?>
<component type="codec">
  <id>gstreamer-good</id>
  <metadata_licence>CC0</metadata_licence>
  <name>GStreamer Multimedia Codecs - Extra</name>
  <description>
    <p>
      This addon includes several additional codecs that are missing
      something - perhaps a good code review, some documentation, a set of
      tests, a real live maintainer, or some actual wide use.
      However, they might be good enough to play your media files.
    </p>
    <p>
      These codecs can be used to encode and decode media files where the
      format is not patent encumbered.
    </p>
    <p>
      A codec decodes audio and video for for playback or editing and is also
      used for transmission or storage.
      Different codecs are used in video-conferencing, streaming media and
      video editing applications.
    </p>
  </description>
  <provides>
    <codec>encoder-audio/mpeg</codec>
    <codec>mpegversion=(int){ 4, 2 }</codec>
    <codec>stream-format=(string){ adts, raw }</codec>
    <codec>encoder-video/mpeg</codec>
    <codec>systemstream=(boolean)false</codec>
    <codec>mpegversion=(int){ 1, 2, 4 }</codec>
    <codec>encoder-video/mpeg</codec>
    <codec>systemstream=(boolean)true</codec>
    <codec>encoder-video/x-xvid</codec>
    <codec>element-faac</codec>
    <codec>element-mpeg2enc</codec>
    <codec>element-mplex</codec>
    <codec>element-xviddec</codec>
    <codec>element-xvidenc</codec>
  </provides>
</component>]]></programlisting>
	</section>

	<section id="spec-codecdata-filespec">
		<title>File specification</title>
		<para>
			Note that the XML root must have the <literal>type</literal> property set to <code>codec</code>.
			This clearly identified this metainfo document as describing a codec.
		</para>

		<variablelist>
			<varlistentry>
			<term>&lt;id/&gt;</term>
			<listitem>
				<para>
					For codecs, there are no special requirements for what their <literal>%{id}</literal> should be.
					But, as for any other component, you should pick a reasonable and unique name.
				</para>
			</listitem>
			</varlistentry>

			<varlistentry>
			<term>&lt;metadata_licence/&gt;</term>
			<listitem>
				<para>
					The <code>&lt;metadata_licence/&gt;</code> tag is required. See <xref linkend="sect-Metadata-GenericComponent"/> for a description of this tag.
				</para>
			</listitem>
			</varlistentry>

			<varlistentry>
			<term>&lt;provides/&gt;</term>
			<listitem>
				<para>
					This tag is described for generic components at <xref linkend="sect-Metadata-GenericComponent"/> in detail.
				</para>
				<para>
					You must add one or more children of type <code>&lt;codec/&gt;</code> to make it known to the system that your
					software is able to provide the mentioned codecs.
					Adding this data is required for all components of <literal>type=codec</literal>.
				</para>
			</listitem>
			</varlistentry>

	</section>
</section>
<commit_msg>trivial: Fix error in spec XML<commit_after><?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % BOOK_ENTITIES SYSTEM "AppStream.ent">
%BOOK_ENTITIES;
]>

<section id="sect-Metadata-Codec">
	<title>Fonts</title>

	<section id="spec-codecdata-introduction">
		<title>Introduction</title>
		<para>
			Software centers might want to special-case codec handling. Therefore, we provide a component type for them.
		</para>
		<para>
			Codecs can ship one or more files in <filename>/usr/share/appdata/%{id}.metainfo.xml</filename>.
		</para>
		<para>
			Codec metadata files can - just likle all other metainfo files - be translated. See the section about translation for more information about that.
		</para>
	</section>

	<section id="spec-codecdata-example">
		<title>Example file</title>
		<para>
			A codec meta-info file should look like this:
		</para>
		<programlisting language="XML">
<![CDATA[<?xml version="1.0" encoding="UTF-8"?>
<component type="codec">
  <id>gstreamer-good</id>
  <metadata_licence>CC0</metadata_licence>
  <name>GStreamer Multimedia Codecs - Extra</name>
  <description>
    <p>
      This addon includes several additional codecs that are missing
      something - perhaps a good code review, some documentation, a set of
      tests, a real live maintainer, or some actual wide use.
      However, they might be good enough to play your media files.
    </p>
    <p>
      These codecs can be used to encode and decode media files where the
      format is not patent encumbered.
    </p>
    <p>
      A codec decodes audio and video for for playback or editing and is also
      used for transmission or storage.
      Different codecs are used in video-conferencing, streaming media and
      video editing applications.
    </p>
  </description>
  <provides>
    <codec>encoder-audio/mpeg</codec>
    <codec>mpegversion=(int){ 4, 2 }</codec>
    <codec>stream-format=(string){ adts, raw }</codec>
    <codec>encoder-video/mpeg</codec>
    <codec>systemstream=(boolean)false</codec>
    <codec>mpegversion=(int){ 1, 2, 4 }</codec>
    <codec>encoder-video/mpeg</codec>
    <codec>systemstream=(boolean)true</codec>
    <codec>encoder-video/x-xvid</codec>
    <codec>element-faac</codec>
    <codec>element-mpeg2enc</codec>
    <codec>element-mplex</codec>
    <codec>element-xviddec</codec>
    <codec>element-xvidenc</codec>
  </provides>
</component>]]></programlisting>
	</section>

	<section id="spec-codecdata-filespec">
		<title>File specification</title>
		<para>
			Note that the XML root must have the <literal>type</literal> property set to <code>codec</code>.
			This clearly identified this metainfo document as describing a codec.
		</para>

		<variablelist>
			<varlistentry>
			<term>&lt;id/&gt;</term>
			<listitem>
				<para>
					For codecs, there are no special requirements for what their <literal>%{id}</literal> should be.
					But, as for any other component, you should pick a reasonable and unique name.
				</para>
			</listitem>
			</varlistentry>

			<varlistentry>
			<term>&lt;metadata_licence/&gt;</term>
			<listitem>
				<para>
					The <code>&lt;metadata_licence/&gt;</code> tag is required. See <xref linkend="sect-Metadata-GenericComponent"/> for a description of this tag.
				</para>
			</listitem>
			</varlistentry>

			<varlistentry>
			<term>&lt;provides/&gt;</term>
			<listitem>
				<para>
					This tag is described for generic components at <xref linkend="sect-Metadata-GenericComponent"/> in detail.
				</para>
				<para>
					You must add one or more children of type <code>&lt;codec/&gt;</code> to make it known to the system that your
					software is able to provide the mentioned codecs.
					Adding this data is required for all components of <literal>type=codec</literal>.
				</para>
			</listitem>
			</varlistentry>
		</variablelist>

	</section>
</section>

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