RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-12-15 19:35:49 +00:00
Code Issues Releases Wiki Activity

Fixes better wording. Suggestions by The Wanderer and Josh Varner.

Browse Source 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@15032 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
gpoirier 2005-03-31 22:31:18 +00:00
parent a9cd166c68
commit 537bbfd112
1 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
DOCS/xml/en/mencoder.xml
View File

@ -592,8 +592,8 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
low enough bitrate that <systemitem class="library">libavcodec</systemitem> low enough bitrate that <systemitem class="library">libavcodec</systemitem>
is forced to use a higher quantizer, then you're almost certainly ruining is forced to use a higher quantizer, then you're almost certainly ruining
the quality of your video. the quality of your video.
In order to avoid that, you should probably down-scale your video, according In order to avoid that, you should probably down scale your video, according
to the method which will be exposed later on that guide. to the method which will be gone over later on that guide.
In general, you should avoid CBR altogether if you care about quality. In general, you should avoid CBR altogether if you care about quality.
</para> </para>
@ -751,7 +751,7 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
there's a limited total number of bits that you can spend; therefore it's there's a limited total number of bits that you can spend; therefore it's
necessary to find a good tradeoff between compressibility and quality. necessary to find a good tradeoff between compressibility and quality.
The CQ depends both on the bitrate and the movie resolution. The CQ depends both on the bitrate and the movie resolution.
In order to raise the CQ, typically you'd downscale the movie given that the In order to raise the CQ, typically you'd down scale the movie given that the
bitrate is computed in function of the target size and the length of the bitrate is computed in function of the target size and the length of the
movie, which are constant. movie, which are constant.
A CQ below 0.18 usually ends up in a very blocky picture, because there A CQ below 0.18 usually ends up in a very blocky picture, because there
@ -810,7 +810,9 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
You may want to normalize the sound before encoding, as DVD audio tracks You may want to normalize the sound before encoding, as DVD audio tracks
are commonly recorded at low volumes. are commonly recorded at low volumes.
You can use the tool <application>normalize</application> for instance, You can use the tool <application>normalize</application> for instance,
which is available in most distribution. which is available in most distributions.
If you're using Windows, a tool such as <application>BeSweet</application>
can do the same job.
You will compress in either Ogg Vorbis or MP3. You will compress in either Ogg Vorbis or MP3.
For example: For example:
<screen>oggenc -q1 destination_sound.wav</screen> <screen>oggenc -q1 destination_sound.wav</screen>
@ -920,11 +922,13 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
into "high quality" mode and move on. into "high quality" mode and move on.
That would probably be nice, but unfortunately hard to implement as different That would probably be nice, but unfortunately hard to implement as different
encoding options yield different qualities depending on the source material. encoding options yield different qualities depending on the source material.
Anime and live action are for example two very different materials that That's because compression depends on the visual properties of the video
require different care. in question.
For example, anime and live action have very different properties and
thus require different options to obtain optimum encoding.
The good news is that some options should never be left out, like The good news is that some options should never be left out, like
<option>mbd=2</option>, <option>trell</option>, and <option>v4mv</option>. <option>mbd=2</option>, <option>trell</option>, and <option>v4mv</option>.
See below a detailed description of common encoding options. See below a for detailed description of common encoding options.
</para> </para>
@ -991,9 +995,8 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
<listitem><para> <listitem><para>
<emphasis role="bold">qns</emphasis>: very slow, especially when combined <emphasis role="bold">qns</emphasis>: very slow, especially when combined
with qprd. with qprd.
This option will make the encoder reduce as much as possible noise due to This option will make the encoder minimize noise due to compression
compression artifacts instead making the encoded video strictly match the artifacts instead making the encoded video strictly match the source.
source.
Don't use this unless you've already tweaked everything else as far as it Don't use this unless you've already tweaked everything else as far as it
will go and the results still aren't good enough. will go and the results still aren't good enough.
</para></listitem> </para></listitem>
@ -1048,7 +1051,7 @@ vcodec=mpeg2video:intra_matrix=8,9,12,22,26,27,29,34,9,10,14,26,27,29,34,37,
<emphasis role="bold">lumi_mask, dark_mask</emphasis>: Psychovisual adaptive <emphasis role="bold">lumi_mask, dark_mask</emphasis>: Psychovisual adaptive
quantization. quantization.
You don't want to play with those options if you care about quality. You don't want to play with those options if you care about quality.
Reasonable values may be effective in your case, but be warned this is a very Reasonable values may be effective in your case, but be warned this is very
subjective. subjective.
</para></listitem> </para></listitem>