source: multimedia/videoutils/ffmpeg.xml@ ddc02883

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind kea ken/TL2024 ken/inkscape-core-mods ken/tuningfonts lazarus lxqt nosym perl-modules plabs/newcss plabs/python-mods python3.11 qt5new rahul/power-profiles-daemon renodr/vulkan-addition trunk upgradedb xry111/intltool xry111/llvm18 xry111/soup3 xry111/test-20220226 xry111/xf86-video-removal
Last change on this file since ddc02883 was ddc02883, checked in by Fernando de Oliveira <fernando@…>, 8 years ago
  • Update to firefox-43.0.1.
  • iptables-1.6.0: typo.
  • libarchive-3.1.2 bsdtar OOM error.
  • Update to ffmpeg-2.8.4.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@16743 af4574ff-66df-0310-9fd7-8a98e5e911e0

  • Property mode set to 100644
File size: 23.3 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY ffmpeg-download-http "http://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.xz">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "ac1e3d6934f9efd8b67713677c7fd99f">
10 <!ENTITY ffmpeg-size "6.9 MB">
11 <!ENTITY ffmpeg-buildsize "156 MB (additional 2439 MB to run the FATE suite)">
12 <!ENTITY ffmpeg-time "1.2 SBU, with -j4 (additional 3.1 SBU, with THREADS=4,
13 to run the FATE suite, after sample files are downloaded)">
14]>
15
16<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
17 <?dbhtml filename="ffmpeg.html"?>
18
19 <sect1info>
20 <othername>$LastChangedBy$</othername>
21 <date>$Date$</date>
22 </sect1info>
23
24 <title>FFmpeg-&ffmpeg-version;</title>
25
26 <indexterm zone="ffmpeg">
27 <primary sortas="a-FFmpeg">FFmpeg</primary>
28 </indexterm>
29
30 <sect2 role="package">
31 <title>Introduction to FFmpeg</title>
32
33 <para>
34 <application>FFmpeg</application> is a solution to record, convert and
35 stream audio and video. It is a very fast video and audio converter and it
36 can also acquire from a live audio/video source. Designed to be intuitive,
37 the command-line interface (<command>ffmpeg</command>) tries to figure out
38 all the parameters, when possible. <application>FFmpeg</application> can
39 also convert from any sample rate to any other, and resize video on the
40 fly with a high quality polyphase filter.
41 <application>FFmpeg</application> can use a Video4Linux compatible video
42 source and any Open Sound System audio source.
43 </para>
44
45 &lfs78_checked;
46
47 <bridgehead renderas="sect3">Package Information</bridgehead>
48 <itemizedlist spacing="compact">
49 <listitem>
50 <para>
51 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
52 </para>
53 </listitem>
54 <listitem>
55 <para>
56 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
57 </para>
58 </listitem>
59 <listitem>
60 <para>
61 Download MD5 sum: &ffmpeg-md5sum;
62 </para>
63 </listitem>
64 <listitem>
65 <para>
66 Download size: &ffmpeg-size;
67 </para>
68 </listitem>
69 <listitem>
70 <para>
71 Estimated disk space required: &ffmpeg-buildsize;
72 </para>
73 </listitem>
74 <listitem>
75 <para>
76 Estimated build time: &ffmpeg-time;
77 </para>
78 </listitem>
79 </itemizedlist>
80
81 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
82
83 <bridgehead renderas="sect4">Recommended</bridgehead>
84 <para role="recommended">
85 <xref linkend="libass"/>,
86 <xref linkend="fdk-aac"/>,
87 <xref linkend="freetype2"/>,
88 <xref linkend="lame"/>,
89 <xref linkend="libtheora"/>,
90 <xref linkend="libvorbis"/>,
91 <xref linkend="libvpx"/>,
92 <xref linkend="opus"/>,
93 <xref linkend="x264"/>,
94 <xref linkend="x265"/>, and
95 <xref linkend="yasm"/>
96 </para>
97
98 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
99 <para>
100 <xref linkend="alsa-lib"/>,
101 <xref linkend="libva"/>,
102 <xref linkend="libvdpau"/> (with the corresponding driver package), and
103 <xref linkend="sdl"/>
104 </para>
105
106 <bridgehead renderas="sect4">Optional</bridgehead>
107 <para role="optional">
108 <xref linkend="faac"/>,
109 <xref linkend="fontconfig"/>,
110 <xref linkend="frei0r"/>,
111 <xref linkend="libcdio"/> (to identify and play CDs),
112 <xref linkend="libwebp"/>,
113 <xref linkend="opencv"/>,
114 <xref linkend="openjpeg"/>,
115 <xref linkend="openssl"/> or
116 <xref linkend="gnutls"/>,
117 <xref linkend="pulseaudio"/>,
118 <xref linkend="speex"/>,
119 <xref linkend="texlive"/>
120 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
121 <xref linkend="v4l-utils"/>,
122 <xref linkend="xvid"/>,
123 <xref linkend="x-window-system"/>,
124 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
125 <ulink url="http://www.quut.com/gsm/">GSM</ulink>,
126 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
127 <!--<ulink url="http://www.ladspa.org/">LADSPA</ulink>,-->
128 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
129 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
130 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
131 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
132 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
133 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
134 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
135 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
136 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
137 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
138 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
139 <ulink url="http://www.libssh.org/">libssh</ulink>,
140 <!--<ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),-->
141 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>,
142 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
143 <ulink url="http://diracvideo.org/">Schroedinger</ulink>,
144 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
145 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
146 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
147 <!--<ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and-->
148 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
149 </para>
150
151 <para condition="html" role="usernotes">
152 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
153 </para>
154 </sect2>
155
156 <sect2 role="installation">
157 <title>Installation of FFmpeg</title>
158
159 <para>
160 First, fix one file for values removed from libvpx-1.5.0:
161 </para>
162
163<screen><userinput>sed -e '/UPD.*=/,/SET_SCA.*=/d' \
164 -e '/SET_SHA.*=/d' \
165 -e '/GET_LAS.*=/d' \
166 -i libavcodec/libvpxenc.c</userinput></screen>
167 <para>
168 Install <application>FFmpeg</application> by running the following
169 commands:
170 </para>
171
172<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
173
174./configure --prefix=/usr \
175 --enable-gpl \
176 --enable-version3 \
177 --enable-nonfree \
178 --disable-static \
179 --enable-shared \
180 --disable-debug \
181 --enable-libass \
182 --enable-libfdk-aac \
183 --enable-libfreetype \
184 --enable-libmp3lame \
185 --enable-libopus \
186 --enable-libtheora \
187 --enable-libvorbis \
188 --enable-libvpx \
189 --enable-libx264 \
190 --enable-libx265 \
191 --enable-x11grab \
192 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
193
194make &amp;&amp;
195
196gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
197
198 <para>
199 HTML documentation was built in the previous step. If you have
200 <xref linkend="texlive"/> installed and wish to build PDF and
201 Postscript versions of the documentation, issue the following commands:
202 </para>
203
204<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
205sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
206
207pushd doc &amp;&amp;
208for DOCNAME in `basename -s .html *.html`
209do
210 texi2pdf -b $DOCNAME.texi &amp;&amp;
211 texi2dvi -b $DOCNAME.texi &amp;&amp;
212
213 dvips -o $DOCNAME.ps \
214 $DOCNAME.dvi
215done &amp;&amp;
216popd &amp;&amp;
217unset DOCNAME</userinput></screen>
218
219 <para>
220 If you have <xref linkend="doxygen"/> installed and wish to create the API
221 documentation (takes about 350 MB of space), issue the command
222 <command>doxygen doc/Doxyfile</command>.
223 </para>
224
225 <para>
226 The fate-suite tests include comparisons with installed files, and should
227 not be run before the package is installed. Therefore, if you desire to
228 run them, instructions are given further below.
229 </para>
230
231 <para>
232 Now, as the <systemitem class="username">root</systemitem> user:
233 </para>
234
235<screen role="root"><userinput>make install &amp;&amp;
236
237install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
238install -v -m644 doc/*.txt \
239 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
240
241 <para>
242 If PDF and Postscript documentations were built, issue the following
243 commands, as the <systemitem class="username">root</systemitem> user, to
244 install them:
245 </para>
246
247<screen role="root"><userinput>install -v -m644 doc/*.pdf \
248 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
249install -v -m644 doc/*.ps \
250 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
251
252 <para>
253 If you used <command>doxygen</command> to create the API documentation,
254 install it (another 300 MB of space) by issuing the following commands
255 as the <systemitem class="username">root</systemitem> user:
256 </para>
257
258<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
259cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
260find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
261find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
262
263 <para>
264 To properly test the installation you must have <xref linkend="rsync"/>
265 installed and follow the instructions for the <ulink
266 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
267 Environment</ulink> (FATE). First, about 947 MB of sample files used to
268 run FATE are downloaded with the command:
269 </para>
270
271<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
272
273 <para>
274 The <filename class="directory">fate-suite</filename> directory is
275 created and the files are downloaded there. That command actually runs an
276 rsync command, to obtain the sample files. You may want to compress and
277 keep this directory for testing again, in another system, or when a new
278 version of ffmpeg is launched. Then, you unpack the sample files in the
279 source directory, and run, again, the <command>make fate-rsync
280 ...</command> command above, to sync with the repository. Now, the
281 download size and time are drastically reduced. Estimated values in
282 "Package Information" do not include the download SBU. Some samples may
283 have been removed, in the new version, so, in order to be sure local and
284 server fate samples are identical, when you use previously saved samples,
285 run the following command:
286 </para>
287
288<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
289 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
290
291 <para>
292 Next, FATE is executed, with the commands (you obtain a number of tests
293 larger than 2500):
294 </para>
295
296<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
297grep ^TEST ../fate.log | wc -l</userinput></screen>
298
299 <para>
300 where <replaceable>N</replaceable> is an integer,
301 <replaceable>N</replaceable> &le; number of threads in the system.
302 </para>
303
304 </sect2>
305
306 <sect2 role="commands">
307 <title>Command Explanations</title>
308
309 <para>
310 <command>sed -i ... configure</command>: This command adds the
311 <application>ALSA</application> library to the
312 <application>Flite</application> <envar>LDFLAGS</envar> variable and
313 enables the discovery of <application>Flite</application>.
314 </para>
315
316 <para>
317 <command>sed -i ... texi</command>: Fix some .texi files for
318 documentation builds.
319 </para>
320
321 <para>
322 <command>find ... ;</command>: Fix permissions of documentation files
323 and directories.
324 </para>
325
326 <para>
327 <option>--enable-libfreetype</option>: Enables
328 <application>Freetype</application> support.
329 </para>
330
331 <para>
332 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
333 permits support for postprocessing, swscale and many other features.
334 </para>
335
336 <para>
337 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
338 version 3 code.
339 </para>
340
341 <para>
342 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
343 Note that the resulting libraries and binaries will be unredistributable.
344 </para>
345
346 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
347 href="../../xincludes/static-libraries.xml"/>
348
349 <para>
350 <parameter>--enable-shared</parameter>: Enables building shared
351 libraries, otherwise only static libraries are built and installed.
352 </para>
353
354 <para>
355 <parameter>--disable-debug</parameter>: Disables building debugging
356 symbols into the programs and libraries.
357 </para>
358
359 <para>
360 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
361 rendering via <filename class="libraryfile">libass</filename>.
362 </para>
363
364 <para>
365 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
366 highest-quality AAC audio encoding via <filename
367 class="libraryfile">libfdk-aac</filename>.
368 </para>
369
370 <para>
371 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
372 via <filename class="libraryfile">libmp3lame</filename>.
373 </para>
374
375 <para>
376 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
377 Theora video encoding via <filename
378 class="libraryfile">libvorbis</filename> and <filename
379 class="libraryfile">libtheora</filename>.
380 </para>
381
382 <para>
383 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
384 encoding via <filename class="libraryfile">libvorbis</filename> and
385 <filename class="libraryfile">libvpx</filename>.
386 </para>
387
388 <para>
389 <parameter>--enable-libx264</parameter>: Enables high-quality
390 H.264/MPEG-4 AVC encoding via <filename
391 class="libraryfile">libx264</filename>.
392 </para>
393
394 <para>
395 <parameter>--enable-libx265</parameter>: Enables high-quality
396 H.265/HEVC encoding via <filename
397 class="libraryfile">libx265</filename>.
398 </para>
399
400 <para>
401 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
402 </para>
403
404 <para>
405 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
406 Enables HTTPS protocol for network streams.
407 </para>
408
409 <para>
410 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
411 builds the <command>qt-faststart</command> program which can modify
412 QuickTime formatted movies (<filename class="extension">.mov</filename>
413 or <filename class="extension">.mp4</filename>) so that the header
414 information is located at the beginning of the file instead of the end.
415 This allows the movie file to begin playing before the entire file has
416 been downloaded.
417 </para>
418
419 <note>
420 <para>
421 Support for most of the dependency packages requires using options
422 passed to the <command>configure</command> script. View the output
423 from <command>./configure --help</command> for complete information
424 about enabling dependency packages.
425 </para>
426 </note>
427
428 </sect2>
429
430 <sect2 role="configuration">
431 <title>Configuring FFmpeg</title>
432
433 <sect3 id="ffmpeg-config">
434 <title>Config Files</title>
435
436 <para>
437 <filename>/etc/ffserver.conf</filename> and
438 <filename>~/.ffmpeg/ffserver-config</filename>
439 </para>
440
441 <indexterm zone="ffmpeg ffmpeg-config">
442 <primary
443 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
444 </indexterm>
445
446 <indexterm zone="ffmpeg ffmpeg-config">
447 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
448 </indexterm>
449
450 <para>
451 You'll find a sample <command>ffserver</command> configuration file at
452 <filename>doc/ffserver.conf</filename> in the source tree.
453 </para>
454
455 </sect3>
456
457 </sect2>
458
459 <sect2 role="content">
460 <title>Contents</title>
461
462 <segmentedlist>
463 <segtitle>Installed Programs</segtitle>
464 <segtitle>Installed Libraries</segtitle>
465 <segtitle>Installed Directories</segtitle>
466
467 <seglistitem>
468 <seg>
469 ffmpeg, ffplay, ffprobe, ffserver, and qt-faststart
470 </seg>
471 <seg>
472 libavcodec.so, libavdevice.so, libavfilter.so,
473 libavformat.so, libavutil.so, libpostproc.so,
474 libswresample, and libswscale.so
475 </seg>
476 <seg>
477 /usr/include/lib{avcodec,avdevice,avfilter,avformat},
478 /usr/include/lib{avutil,postproc,swresample,swscale},
479 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
480 /usr/share/ffmpeg
481 </seg>
482 </seglistitem>
483 </segmentedlist>
484
485 <variablelist>
486 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
487 <?dbfo list-presentation="list"?>
488 <?dbhtml list-presentation="table"?>
489
490 <varlistentry id="ffmpeg-prog">
491 <term><command>ffmpeg</command></term>
492 <listitem>
493 <para>
494 is a command-line tool to convert video files, network streams and
495 input from a TV card to several video formats.
496 </para>
497 <indexterm zone="ffmpeg ffmpeg-prog">
498 <primary sortas="b-ffmpeg">ffmpeg</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="ffplay">
504 <term><command>ffplay</command></term>
505 <listitem>
506 <para>
507 is a very simple and portable media player using the
508 <filename>ffmpeg</filename> libraries and the SDL library.
509 </para>
510 <indexterm zone="ffmpeg ffplay">
511 <primary sortas="b-ffplay">ffplay</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="ffprobe">
517 <term><command>ffprobe</command></term>
518 <listitem>
519 <para>
520 gathers information from multimedia streams and prints it in a human
521 and machine-readable fashion.
522 </para>
523 <indexterm zone="ffmpeg ffprobe">
524 <primary sortas="b-ffprobe">ffprobe</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529 <varlistentry id="ffserver">
530 <term><command>ffserver</command></term>
531 <listitem>
532 <para>
533 is a streaming server for everything that <command>ffmpeg</command>
534 could use as input (files, streams, TV card input, webcam, etc).
535 </para>
536 <indexterm zone="ffmpeg ffserver">
537 <primary sortas="b-ffserver">ffserver</primary>
538 </indexterm>
539 </listitem>
540 </varlistentry>
541
542 <varlistentry id="qt-faststart">
543 <term><command>qt-faststart</command></term>
544 <listitem>
545 <para>
546 moves the index file to the front of quicktime (mov/mp4) videos.
547 </para>
548 <indexterm zone="ffmpeg qt-faststart">
549 <primary sortas="b-qt-faststart">qt-faststart</primary>
550 </indexterm>
551 </listitem>
552 </varlistentry>
553
554 <varlistentry id="libavcodec">
555 <term><filename class="libraryfile">libavcodec.so</filename></term>
556 <listitem>
557 <para>
558 is a library containing the <application>FFmpeg</application> codecs
559 (both encoding and decoding).
560 </para>
561 <indexterm zone="ffmpeg libavcodec">
562 <primary sortas="c-libavcodec">libavcodec.so</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="libavdevice">
568 <term><filename class="libraryfile">libavdevice.so</filename></term>
569 <listitem>
570 <para>
571 is the <application>FFmpeg</application> device handling library.
572 </para>
573 <indexterm zone="ffmpeg libavdevice">
574 <primary sortas="c-libavdevice">libavdevice.so</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="libavfilter">
580 <term><filename class="libraryfile">libavfilter.so</filename></term>
581 <listitem>
582 <para>
583 is a library of filters that can alter video or audio between the
584 decoder and the encoder (or output).
585 </para>
586 <indexterm zone="ffmpeg libavfilter">
587 <primary sortas="c-libavfilter">libavfilter.so</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="libavformat">
593 <term><filename class="libraryfile">libavformat.so</filename></term>
594 <listitem>
595 <para>
596 is a library containing the file formats handling (mux and demux
597 code for several formats) used by <command>ffplay</command> as well
598 as allowing the generation of audio or video streams.
599 </para>
600 <indexterm zone="ffmpeg libavformat">
601 <primary sortas="c-libavformat">libavformat.so</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="libavutil">
607 <term><filename class="libraryfile">libavutil.so</filename></term>
608 <listitem>
609 <para>
610 is the <application>FFmpeg</application> utility library.
611 </para>
612 <indexterm zone="ffmpeg libavutil">
613 <primary sortas="c-libavutil">libavutil.so</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617
618 <varlistentry id="libpostproc">
619 <term><filename class="libraryfile">libpostproc.so</filename></term>
620 <listitem>
621 <para>
622 is the <application>FFmpeg</application> post processing library.
623 </para>
624 <indexterm zone="ffmpeg libpostproc">
625 <primary sortas="c-libpostproc">libpostproc.so</primary>
626 </indexterm>
627 </listitem>
628 </varlistentry>
629
630 <varlistentry id="libswresample">
631 <term><filename class="libraryfile">libswresample.so</filename></term>
632 <listitem>
633 <para>
634 is the <application>FFmpeg</application> audio rescaling library,
635 it contains functions for converting audio sample formats.
636 </para>
637 <indexterm zone="ffmpeg libswresample">
638 <primary sortas="c-libswresample">libswresample.so</primary>
639 </indexterm>
640 </listitem>
641 </varlistentry>
642
643 <varlistentry id="libswscale">
644 <term><filename class="libraryfile">libswscale.so</filename></term>
645 <listitem>
646 <para>
647 is the <application>FFmpeg</application> image rescaling library.
648 </para>
649 <indexterm zone="ffmpeg libswscale">
650 <primary sortas="c-libswscale">libswscale.so</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 </variablelist>
656
657 </sect2>
658
659</sect1>
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