mirror of
https://github.com/Zeckmathederg/glfs.git
synced 2025-02-06 00:48:19 +08:00
94e8b392f5
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@1971 af4574ff-66df-0310-9fd7-8a98e5e911e0
47 lines
2.0 KiB
XML
47 lines
2.0 KiB
XML
<sect2>
|
|
<title>Contents</title>
|
|
|
|
<para>The <application>XviD</application> core package contains the <filename
|
|
class="libraryfile">libxvidcore</filename> library.</para>
|
|
|
|
</sect2>
|
|
|
|
<sect2><title>Description</title>
|
|
|
|
<sect3><title>libxvidcore</title>
|
|
<para><filename class="libraryfile">libxvidcore</filename> provides
|
|
functions to encode and decode most <acronym>MPEG</acronym>-4 video
|
|
data.</para></sect3>
|
|
|
|
<!--
|
|
<para>Following features of MPEG-4 are supported:</para>
|
|
<para><emphasis>I, P Frame encoding</emphasis></para>
|
|
<para>I-Frames are image frames, while P-Frames are Pattern Frames.
|
|
Image Frames contain full images. P-Frames contain patterns of what changes in
|
|
the image, thusly saving a lot of space.</para>
|
|
<para><emphasis>PMVFast and EPZS with diamond a sqare pattern motion
|
|
estimation</emphasis></para>
|
|
<para>Fast Motion detection that can refer a square or diamond
|
|
shaped pattern to different directions.</para>
|
|
<para><emphasis>inter4v mode</emphasis></para>
|
|
<para>Fast interpolation ability.</para>
|
|
<para><emphasis>fullpixel and halfpixel precision</emphasis></para>
|
|
<para>Even halfpixel movements can be encoded. Better precision
|
|
results in better compression at better quality.</para>
|
|
<para><emphasis>both MPEG-4 and H263 quantizations</emphasis></para>
|
|
<para>MPEG-4 is the standard DivX was derived from. H263 is a
|
|
slightly changed subset of that standard made by Microsoft. Quantization
|
|
means to map the quantity of color values to numbers.</para>
|
|
<para><emphasis>custom quant matrices</emphasis></para>
|
|
<para>The quantization can be done using custom matrices,
|
|
possibly giving better results if the matrix is made to suit the video
|
|
data. Every normal user should be fine with the default matrix that comes
|
|
with <application>XviD</application>.</para>
|
|
<para><emphasis>Adaptive quantization / Luminance masking</emphasis></para>
|
|
<para>Qantization and Luminance masking are variant, depending
|
|
on the input material, therefore providing better results on dark or very
|
|
contrasting images.</para>
|
|
-->
|
|
|
|
</sect2>
|