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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>13.1. Vb&#283;r kodek&#367; a nosnch formt&#367;</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="MPlayer - Multimediln p&#345;ehrva&#269;"><link rel="up" href="mencoder.html" title="Kapitola 13. Zkladn pou&#382;it MEncoderu"><link rel="prev" href="mencoder.html" title="Kapitola 13. Zkladn pou&#382;it MEncoderu"><link rel="next" href="menc-feat-selecting-input.html" title="13.2. Vb&#283;r vstupnho souboru nebo za&#345;zen"><link rel="preface" href="howtoread.html" title="Jak &#269;st tuto  dokumentaci"><link rel="chapter" href="intro.html" title="Kapitola 1. P&#345;edstaven"><link rel="chapter" href="install.html" title="Kapitola 2. Instalace"><link rel="chapter" href="usage.html" title="Kapitola 3. Pou&#382;it"><link rel="chapter" href="cd-dvd.html" title="Kapitola 4. Pou&#382;it CD/DVD"><link rel="chapter" href="faq.html" title="Kapitola 5. &#268;asto Kladen Dotazy (FAQ)"><link rel="chapter" href="containers.html" title="Kapitola 6. Nosn formty (Containers)"><link rel="chapter" href="codecs.html" title="Kapitola 7. Kodeky"><link rel="chapter" href="video.html" title="Kapitola 8. Vstupn video za&#345;zen/rozhran"><link rel="chapter" href="audio.html" title="Kapitola 9. Vstupn zvukov za&#345;zen"><link rel="chapter" href="tv.html" title="Kapitola 10. TV"><link rel="chapter" href="radio.html" title="Kapitola 11. Rdio"><link rel="chapter" href="ports.html" title="Kapitola 12. Porty"><link rel="chapter" href="mencoder.html" title="Kapitola 13. Zkladn pou&#382;it MEncoderu"><link rel="chapter" href="encoding-guide.html" title="Kapitola 14. Enkdovn s MEncoderem"><link rel="appendix" href="bugreports.html" title="P&#345;loha A. Jak hlsit chyby"><link rel="appendix" href="bugs.html" title="P&#345;loha B. Znm chyby"><link rel="appendix" href="skin.html" title="P&#345;loha C. Formt skin&#367; MPlayeru"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">13.1. Vb&#283;r kodek&#367; a nosnch formt&#367;</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="mencoder.html">P&#345;edchzejc</a></td><th width="60%" align="center">Kapitola 13. Zkladn pou&#382;it <span class="application">MEncoder</span>u</th><td width="20%" align="right"><a accesskey="n" href="menc-feat-selecting-input.html">Dal&#353;</a></td></tr></table><hr></div><div class="sect1" lang="cs"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="menc-feat-selecting-codec"></a>13.1. Vb&#283;r kodek&#367; a nosnch formt&#367;</h2></div></div></div><p>
  Audio a video kodeky pro enkdovn jsou vybrny p&#345;slu&#353;nmi volbami
  <tt class="option">-oac</tt> a <tt class="option">-ovc</tt> options.
  Napi&#353;te nap&#345;klad:
  </p><pre class="screen">mencoder -ovc help</pre><p>
  pro seznam video kodek&#367; podporovanch verz programu
  <span class="application">MEncoder</span> na va&#353;em po&#269;ta&#269;i.
  Dostupn jsou nsledujc mo&#382;nosti:
</p><p>
Audio (zvukov) kodeky:

</p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><thead><tr><th>Jmno audio kodeku</th><th>Popis</th></tr></thead><tbody><tr><td>mp3lame</td><td>Enkduje do VBR, ABR nebo CBR MP3 pomoc LAME</td></tr><tr><td>lavc</td><td>Pou&#382;ije se n&#283;kter z
    <a href="menc-feat-enc-libavcodec.html#menc-feat-enc-libavcodec-audio-codecs" title="14.3.2. Audio kodeky libavcodec">
    <code class="systemitem">libavcodec</code> audio kodek&#367;</a>
    </td></tr><tr><td>faac</td><td>FAAC AAC audio enkodr</td></tr><tr><td>toolame</td><td>Enkodr MPEG Audio Layer 2</td></tr><tr><td>twolame</td><td>Enkodr MPEG Audio Layer 2 zalo&#382;en na tooLAME</td></tr><tr><td>pcm</td><td>Nekomprimovan PCM zvuk</td></tr><tr><td>copy</td><td>Nereenkduje, pouze kopruje komprimovan vzorky</td></tr></tbody></table></div><p>
</p><p>
Video kodeky:
</p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><thead><tr><th>Jmno video kodeku</th><th>Popis</th></tr></thead><tbody><tr><td>lavc</td><td>Pou&#382;ije se n&#283;kter z
    <a href="menc-feat-enc-libavcodec.html#menc-feat-enc-libavcodec-video-codecs" title="14.3.1. Video kodeky libavcodec">
    <code class="systemitem">libavcodec</code> video kodek&#367;</a>
    </td></tr><tr><td>xvid</td><td>XviD, MPEG-4 Advanced Simple Profile (ASP) kodek</td></tr><tr><td>x264</td><td>x264, MPEG-4 Advanced Video Coding (AVC), alias H.264 kodek</td></tr><tr><td>nuv</td><td>nuppel video, pou&#382;van n&#283;ktermi realtime aplikacemi</td></tr><tr><td>raw</td><td>Nekomprimovan videosnmky</td></tr><tr><td>copy</td><td>Nereenkduje, pouze kopruje komprimovan snmky</td></tr><tr><td>frameno</td><td>Pou&#382;it pro 3-pr&#367;chodov enkdovn (nedoporu&#269;ujeme)</td></tr></tbody></table></div><p>
</p><p>
  Vstupn nosn formt je vybrn volbou <tt class="option">-of</tt>.
  Zadejte:
  </p><pre class="screen">mencoder -of help</pre><p>
  pro seznam v&#353;ech nosnch formt&#367; podporovanch verz programu
  <span class="application">MEncoder</span> na va&#353;em po&#269;ta&#269;i.
  Dostupn jsou nsledujc mo&#382;nosti:
</p><p>
Nosn formty:
</p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><thead><tr><th>Nzev nosnho formtu</th><th>Popis</th></tr></thead><tbody><tr><td>lavf</td><td>Jeden z nosnch formt&#367; podporovanch
    <code class="systemitem">libavformat</code></td></tr><tr><td>avi</td><td>Audio-Video Interleaved (Prokldan audio s videem)</td></tr><tr><td>mpeg</td><td>MPEG-1 a MPEG-2 PS</td></tr><tr><td>rawvideo</td><td>surov (raw) video datov proud (&#382;dn muxing &#8211; pouze jeden
    video proud)</td></tr><tr><td>rawaudio</td><td>surov (raw) audio datov proud (&#382;dn muxing &#8211; pouze jeden
    audio proud)</td></tr></tbody></table></div><p>
  Nosn formt AVI je nativnm nosnm formtem
  <span class="application">MEncoder</span>u, co&#382; znamen, &#382;e je tm, kter je nejlpe
  zpracovn a pro n&#283;j&#382; byl <span class="application">MEncoder</span>
  navr&#382;en.
  Jak bylo zmn&#283;no, ostatn nosn formty jsou pou&#382;iteln, ale m&#367;&#382;ete
  p&#345;i jejich pou&#382;it narazit na problmy.
</p><p>
Nosn formty <code class="systemitem">libavformat</code>:
</p><p>
  Pokud jste si zvolili <code class="systemitem">libavformat</code>
  pro provd&#283;n muxovn vstupnho souboru (pomoc <tt class="option">-of lavf</tt>),
  p&#345;slu&#353;n nosn formt bude ur&#269;en z p&#345;pony vstupnho souboru.
  M&#367;&#382;ete vynutit ur&#269;it nosn formt pomoc parametru <tt class="option">format</tt>
  knihovny <code class="systemitem">libavformat</code>.

</p><div class="informaltable"><table border="1"><colgroup><col><col></colgroup><thead><tr><th>Nzev <code class="systemitem">libavformat</code> nosnho formtu</th><th>Popis</th></tr></thead><tbody><tr><td>mpg</td><td>MPEG-1 a MPEG-2 PS</td></tr><tr><td>asf</td><td>Advanced Streaming Format</td></tr><tr><td>avi</td><td>Audio-Video Interleaved</td></tr><tr><td>wav</td><td>Waveform Audio</td></tr><tr><td>swf</td><td>Macromedia Flash</td></tr><tr><td>flv</td><td>Macromedia Flash video</td></tr><tr><td>rm</td><td>RealMedia</td></tr><tr><td>au</td><td>SUN AU</td></tr><tr><td>nut</td><td>otev&#345;en nosn formt NUT (experimentln a dosud neslu&#269;iteln se specifikac)</td></tr><tr><td>mov</td><td>QuickTime</td></tr><tr><td>mp4</td><td>formt MPEG-4</td></tr><tr><td>dv</td><td>Sony Digital Video</td></tr></tbody></table></div><p>
  Jak vidte, <code class="systemitem">libavformat</code>
  umo&#382;&#328;uje <span class="application">MEncoder</span>u muxovat do velkho mno&#382;stv
  nosnch formt&#367;.
  Nane&#353;t&#283;st, jeliko&#382; <span class="application">MEncoder</span> nebyl od po&#269;tku
  navr&#382;en pro podporu jinch nosnch formt&#367; ne&#382; AVI, m&#283;li byste bt
  paranoidn ve vstahu k vstupnmu souboru.
  Ov&#283;&#345;te si prosm pro jistotu, &#382;e audio/video synchronizace je OK
  a soubor lze sprvn&#283; p&#345;ehrt i jinmi p&#345;ehrva&#269;i, ne&#382;
  <span class="application">MPlayer</span>.
</p><div class="informalexample"><p>P&#345;klad:</p><p>
  Vytvo&#345;en Macromedia Flash videa vhodnho pro p&#345;ehrvn ve webovm prohl&#382;e&#269;i
  pomoc Macromedia Flash pluginu:
</p><pre class="screen">
mencoder <em class="replaceable"><code>vstupn.avi</code></em> -o <em class="replaceable"><code>vstupn.flv</code></em> -of lavf -oac mp3lame -lameopts abr:br=56 -ovc lavc \
-lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 \
-srate 22050
</pre><p>
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="mencoder.html">P&#345;edchzejc</a></td><td width="20%" align="center"><a accesskey="u" href="mencoder.html">Nahoru</a></td><td width="40%" align="right"><a accesskey="n" href="menc-feat-selecting-input.html">Dal&#353;</a></td></tr><tr><td width="40%" align="left" valign="top">Kapitola 13. Zkladn pou&#382;it <span class="application">MEncoder</span>u</td><td width="20%" align="center"><a accesskey="h" href="index.html">Dom&#367;</a></td><td width="40%" align="right" valign="top">13.2. Vb&#283;r vstupnho souboru nebo za&#345;zen</td></tr></table></div></body></html>