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clarify chosen ffmpeg configure switches

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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@11945 af4574ff-66df-0310-9fd7-8a98e5e911e0
This commit is contained in:
Igor Živković 2013-10-09 09:29:36 +00:00
parent 1a62f7607b
commit c012c1a9f8
1 changed files with 31 additions and 40 deletions
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71
multimedia/videoutils/ffmpeg.xml
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@ -255,16 +255,6 @@ install -v -m644 doc/doxy/html/* \
enables the discovery of <application>Flite</application>.
</para>
<para>
<command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>:
This builds the <command>qt-faststart</command> program which can
modify QuickTime formatted movies
(<filename class="extension">.mov</filename> or
<filename class="extension">.mp4</filename>) so that the header information
is located at the beginning of the file instead of the end. This allows
the movie file to begin playing before the entire file has been downloaded.
</para>
<para>
<parameter>--enable-gpl</parameter>: Enables the use of GPL code and
permits support for postprocessing, swscale and many other features.
@ -300,40 +290,37 @@ install -v -m644 doc/doxy/html/* \
</para>
<para>
<parameter>--enable-libfdk-aac</parameter>: Enables AAC format de/encoding
via <filename class="libraryfile">libfdk-aac</filename>.
<parameter>--enable-libfdk-aac</parameter>: Enables currently the
highest-quality AAC audio encoding via <filename
class="libraryfile">libfdk-aac</filename>.
</para>
<para>
<parameter>--enable-libmp3lame</parameter>: Enables MP3 de/encoding via
<parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding via
<filename class="libraryfile">libmp3lame</filename>.
</para>
<para>
<parameter>--enable-libopus</parameter>: Enables Opus format de/encoding
via <filename class="libraryfile">libopus</filename>.
<parameter>--enable-libopus</parameter>: Enables Opus encoding for low
latency streaming via <filename class="libraryfile">libopus</filename>.
</para>
<para>
<parameter>--enable-libtheora</parameter>: Enables
<application>Theora</application> de/encoding
via <filename class="libraryfile">libtheora</filename>.
<parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
Theora video encoding via <filename
class="libraryfile">libvorbis</filename> and <filename
class="libraryfile">libtheora</filename>.
</para>
<para>
<parameter>--enable-libvorbis</parameter>: Enables
<application>Vorbis</application> de/encoding
via <filename class="libraryfile">libvorbis</filename>.
<parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
encoding via <filename class="libraryfile">libvorbis</filename> and
<filename class="libraryfile">libvpx</filename>.
</para>
<para>
<parameter>--enable-libvpx</parameter>: Enables VP8 de/encoding
via <filename class="libraryfile">libvpx</filename>.
</para>
<para>
<parameter>--enable-libx264</parameter>: Enables H.264 de/encoding
via <filename class="libraryfile">libx264</filename>.
<parameter>--enable-libx264</parameter>: Enables high-quality H.264/MPEG-4
AVC encoding via <filename class="libraryfile">libx264</filename>.
</para>
<para>
@ -341,20 +328,24 @@ install -v -m644 doc/doxy/html/* \
</para>
<para>
Support for most of the dependency packages requires using options passed
to the <command>configure</command> script. View the the output from
<command>./configure --help</command> for complete information about
enabling dependency packages. The only reason to enable a specific codec
(and make <application>FFmpeg</application> link to the prerequisite
shared library installed on your system) is to make
<application>FFmpeg</application> compile an <emphasis>encoder</emphasis>
and/or <emphasis>decoder</emphasis> for that codec. If you just want to
use <application>FFmpeg</application> to watch video or listen to music
(via other applications such as <application>Gstreamer</application> or
<application>Xine</application>) then you will not benefit from linking
<application>FFmpeg</application> to other codec libraries.
<command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>:
This builds the <command>qt-faststart</command> program which can
modify QuickTime formatted movies
(<filename class="extension">.mov</filename> or
<filename class="extension">.mp4</filename>) so that the header information
is located at the beginning of the file instead of the end. This allows
the movie file to begin playing before the entire file has been downloaded.
</para>
<note>
<para>
Support for most of the dependency packages requires using options
passed to the <command>configure</command> script. View the the output
from <command>./configure --help</command> for complete information
about enabling dependency packages.
</para>
</note>
</sect2>
<sect2 role="configuration">