mirror of https://github.com/mpv-player/mpv
new x264 entries: me (motion estimation search algorithm) and 4x4mv options. Patch by Jeff Clagg (snacky BLAM ikaruga POUM co POUM uk)
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15599 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -2262,6 +2262,38 @@ Note the <option>ilmv</option> and <option>ildct</option> options.
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but it does sometimes come up in video game captures.
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</para></listitem>
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<listitem><para>
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<emphasis role="bold">me</emphasis>:
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This option is for choosing the motion estimation search method.
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Altering this option provides a straightforward quality-vs-speed
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tradeoff. <option>me=1</option> is only a few percent faster than
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the default search, at a cost of under 0.1dB global PSNR. The
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default setting (<option>me=2</option>) is a reasonable tradeoff
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between speed and quality. <option>me=3</option> gains a little under
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0.1dB global PSNR, with a speed penalty that varies depending on
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<option>frameref</option>. At high values of
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<option>frameref</option> (e.g. 12 or so), <option>me=3</option>
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is about 40% slower than the default <option> me=2</option>. With
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<option>frameref=3</option>, the speed penalty incurred drops to
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25%-30%.
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</para>
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<para>
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<option>me=4</option> uses an exhaustive search that is too slow for
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practical use.
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</para>
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</listitem>
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<listitem><para>
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<emphasis role="bold">4x4mv</emphasis>:
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This option enables the use of 8x4, 4x8 and 4x4 subpartitions in
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predicted macroblocks. Enabling it results in a fairly consistent
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10%-15% loss of speed. This option is rather useless in source
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containing only low motion, however in some high-motion source,
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particularly source with lots of small moving objects, gains of
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about 0.1dB can be expected.
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</para>
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</listitem>
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<listitem><para>
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<emphasis role="bold">bframes</emphasis>:
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The usefulness of B-frames is questionable in most other codecs
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