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author | gpoirier <gpoirier@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-08-20 20:13:03 +0000 |
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committer | gpoirier <gpoirier@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2005-08-20 20:13:03 +0000 |
commit | ca0c2746ca701873575e2f1ed8012cebb479f658 (patch) | |
tree | 5e7d54c9884293b50740f9b766a74c61b53c830e /DOCS | |
parent | 2d1b8d3df66296a24a76411bb4a17d48ee57bfe1 (diff) | |
download | mpv-ca0c2746ca701873575e2f1ed8012cebb479f658.tar.bz2 mpv-ca0c2746ca701873575e2f1ed8012cebb479f658.tar.xz |
Encoding setting examples for x264
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@16278 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'DOCS')
-rw-r--r-- | DOCS/xml/en/encoding-guide.xml | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/DOCS/xml/en/encoding-guide.xml b/DOCS/xml/en/encoding-guide.xml index ac85040b2b..010df15e78 100644 --- a/DOCS/xml/en/encoding-guide.xml +++ b/DOCS/xml/en/encoding-guide.xml @@ -3201,6 +3201,50 @@ codec</title> </itemizedlist> </sect3> </sect2> + +<sect2 id="menc-feat-x264-example-settings"> +<title>Encoding settings examples</title> + +<para> + The following settings are examples of different encoding + options combinations that affect the speed VS quality tradeoff + given the same target bitrate. + + If you are aiming at perfect quality without too much thinking and + no size limitation, a low constant quantizer encode (like with + <option>qp_constant=18</option>) with no B-frames + (<option>bframes=0</option>) will probably look very good, but + will needlessly spend lots of bits to encode details that could be + coded more wisely using some advanced settings. +</para> + +<para> + All the encoding settings were tested on a 720x448 @30000/1001 fps + video sample, the target bitrate was 900kbps, and the machine was an + AMD-64 3400+ at 2400 Mhz in 64 bits mode. + Each encoding setting is followed by the encoding speed (in frames + per seconds), the compression efficiency loss (in percent of bitrate) + compared to the "very high quality" setting, and the PSNR loss (in dB). + Please understand that depending on your source your machine type + and the development breakthrough, you may get very different results. +</para> + +<itemizedlist> +<listitem><para><emphasis role="bold">Very high quality:</emphasis> +<option>subq=6:4x4mv:8x8dct:me=3:frameref=5:bframes=3:b_pyramid:weight_b</option> +6fps, 0%, 0dB. +</para></listitem> +<listitem><para><emphasis role="bold">High quality:</emphasis> +<option>subq=5:4x4mv:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b:psnr</option> +13fps, -13%, -0.89dB. +</para></listitem> +<listitem><para><emphasis role="bold">Fast:</emphasis> +<option>subq=4:bframes=2:b_pyramid:weight_b:psnr</option> +17fps, -20%, -1.48dB. +</para></listitem> +</itemizedlist> +</sect2> + </sect1> <sect1 id="menc-feat-vcd-dvd"> |