source: multimedia/videoutils/ffmpeg.xml@ 69d725d4

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 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 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 69d725d4 was 69d725d4, checked in by Bruce Dubbs <bdubbs@…>, 7 years ago

Update to clutter-1.26.2.
Update to freetype-2.8.
Update to sysstat-11.5.6.
Update to xfce4-terminal-0.8.5.1.
Update to ffmpeg-3.3.1.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@18731 af4574ff-66df-0310-9fd7-8a98e5e911e0

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File size: 23.2 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 "047dce1928df340574c891fb801d89ad">
10 <!ENTITY ffmpeg-size "7.9 MB">
11 <!ENTITY ffmpeg-buildsize "134 MB (add 2.7 GB for the FATE suite/tests, add 17 MB for docs)">
12 <!ENTITY ffmpeg-time "3.9 SBU (add 5.0 SBU to run the FATE suite after sample files are downloaded, add 0.4 SBU for docs)">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 </sect1info>
22
23 <title>FFmpeg-&ffmpeg-version;</title>
24
25 <indexterm zone="ffmpeg">
26 <primary sortas="a-FFmpeg">FFmpeg</primary>
27 </indexterm>
28
29 <sect2 role="package">
30 <title>Introduction to FFmpeg</title>
31
32 <para>
33 <application>FFmpeg</application> is a solution to record, convert and
34 stream audio and video. It is a very fast video and audio converter and it
35 can also acquire from a live audio/video source. Designed to be intuitive,
36 the command-line interface (<command>ffmpeg</command>) tries to figure out
37 all the parameters, when possible. <application>FFmpeg</application> can
38 also convert from any sample rate to any other, and resize video on the
39 fly with a high quality polyphase filter.
40 <application>FFmpeg</application> can use a Video4Linux compatible video
41 source and any Open Sound System audio source.
42 </para>
43
44 &lfs80_checked;
45 &gcc7_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 role="recommended">
100 <xref linkend="alsa-lib"/>,
101 <xref linkend="libva"/>,
102 <xref linkend="libvdpau"/> (with the corresponding driver package), and
103 <xref linkend="sdl2"/>,
104 </para>
105
106 <bridgehead renderas="sect4">Optional</bridgehead>
107 <para role="optional">
108 <xref linkend="fontconfig"/>,
109 <xref linkend="frei0r"/>,
110 <xref linkend="libcdio"/> (to identify and play CDs),
111 <xref linkend="libwebp"/>,
112 <xref linkend="opencv"/>,
113 <xref linkend="openjpeg"/>,
114 <xref linkend="openssl"/> or
115 <xref linkend="gnutls"/>,
116 <xref linkend="pulseaudio"/>,
117 <xref linkend="speex"/>,
118 <xref linkend="texlive"/>
119 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
120 <xref linkend="v4l-utils"/>,
121 <xref linkend="xvid"/>,
122 <xref linkend="x-window-system"/>,
123 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
124 <ulink url="http://www.quut.com/gsm/">GSM</ulink>,
125 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
126 <!--<ulink url="http://www.ladspa.org/">LADSPA</ulink>,-->
127 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
128 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
129 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
130 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
131 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
132 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
133 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
134 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
135 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
136 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
137 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
138 <ulink url="http://www.libssh.org/">libssh</ulink>,
139 <!--<ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),-->
140 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>,
141 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
142 <!--<ulink url="http://diracvideo.org/">Schroedinger</ulink>,-->
143 <ulink url="http://sourceforge.net/projects/schrodinger/">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 Install <application>FFmpeg</application> by running the following
161 commands:
162 </para>
163
164<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
165
166./configure --prefix=/usr \
167 --enable-gpl \
168 --enable-version3 \
169 --enable-nonfree \
170 --disable-static \
171 --enable-shared \
172 --disable-debug \
173 --enable-libass \
174 --enable-libfdk-aac \
175 --enable-libfreetype \
176 --enable-libmp3lame \
177 --enable-libopus \
178 --enable-libtheora \
179 --enable-libvorbis \
180 --enable-libvpx \
181 --enable-libx264 \
182 --enable-libx265 \
183 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
184
185make &amp;&amp;
186
187gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
188
189 <para>
190 HTML documentation was built in the previous step. If you have
191 <xref linkend="texlive"/> installed and wish to build PDF and
192 Postscript versions of the documentation, issue the following commands:
193 </para>
194
195<!-- sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
196sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp; -->
197<screen><userinput>pushd doc &amp;&amp;
198for DOCNAME in `basename -s .html *.html`
199do
200 texi2pdf -b $DOCNAME.texi &amp;&amp;
201 texi2dvi -b $DOCNAME.texi &amp;&amp;
202
203 dvips -o $DOCNAME.ps \
204 $DOCNAME.dvi
205done &amp;&amp;
206popd &amp;&amp;
207unset DOCNAME</userinput></screen>
208
209 <para>
210 If you have <xref linkend="doxygen"/> installed
211 and you wish to build (if --disable-doc was
212 used) or rebuild the html documentation, issue the command
213 <command>doxygen doc/Doxyfile</command>.
214 </para>
215
216 <para>
217 The fate-suite tests include comparisons with installed files, and should
218 not be run before the package is installed. Therefore, if you desire to
219 run them, instructions are given further below.
220 </para>
221
222 <para>
223 Now, as the <systemitem class="username">root</systemitem> user:
224 </para>
225
226<screen role="root"><userinput>make install &amp;&amp;
227
228install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
229install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
230install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
231
232 <para>
233 If the PDF and Postscript documentation was built, issue the following
234 commands, as the <systemitem class="username">root</systemitem> user, to
235 install them:
236 </para>
237
238<screen role="root"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
239install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
240
241 <para>
242 If you used <command>doxygen</command> to manually create the API
243 documentation, install it by issuing the following commands
244 as the <systemitem class="username">root</systemitem> user:
245 </para>
246
247<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
248cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
249find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
250find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
251
252 <para>
253 To properly test the installation you must have <xref linkend="rsync"/>
254 installed and follow the instructions for the <ulink
255 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
256 Environment</ulink> (FATE). First, about 1 GB of sample files used to
257 run FATE are downloaded with the command:
258 </para>
259
260<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
261
262 <para>
263 The <filename class="directory">fate-suite</filename> directory is
264 created and the files are downloaded there. That command actually runs an
265 rsync command, to obtain the sample files. You may want to compress and
266 keep this directory for testing again, in another system, or when a new
267 version of ffmpeg is launched. Then, you unpack the sample files in the
268 source directory, and run, again, the <command>make fate-rsync
269 ...</command> command above, to sync with the repository. Now, the
270 download size and time are drastically reduced. Estimated values in
271 "Package Information" do not include the download SBU. Some samples may
272 have been removed, in the new version, so, in order to be sure local and
273 server fate samples are identical, when you use previously saved samples,
274 run the following command:
275 </para>
276
277<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
278 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
279
280 <para>
281 Next, FATE is executed, with the commands (you obtain a number of tests
282 larger than 3000):
283 </para>
284
285<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
286grep ^TEST ../fate.log | wc -l</userinput></screen>
287
288 <para>
289 where <replaceable>N</replaceable> is an integer,
290 <replaceable>N</replaceable> &le; number of cores in the system.
291 </para>
292
293 </sect2>
294
295 <sect2 role="commands">
296 <title>Command Explanations</title>
297
298 <para>
299 <command>sed -i ... configure</command>: This command adds the
300 <application>ALSA</application> library to the
301 <application>Flite</application> <envar>LDFLAGS</envar> variable and
302 enables the discovery of <application>Flite</application>.
303 </para>
304
305 <para>
306 <command>find ... ;</command>: Fix permissions of documentation files
307 and directories.
308 </para>
309
310 <para>
311 <parameter>--enable-libfreetype</parameter>: Enables
312 <application>Freetype</application> support.
313 </para>
314
315 <para>
316 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
317 permits support for postprocessing, swscale and many other features.
318 </para>
319
320 <para>
321 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
322 version 3 code.
323 </para>
324
325 <para>
326 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
327 Note that the resulting libraries and binaries will be unredistributable.
328 </para>
329
330 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
331 href="../../xincludes/static-libraries.xml"/>
332
333 <para>
334 <parameter>--enable-shared</parameter>: Enables building shared
335 libraries, otherwise only static libraries are built and installed.
336 </para>
337
338 <para>
339 <parameter>--disable-doc</parameter>: Disables building html documentation.
340 This is only needed if <xref linkend="doxygen"/> is installed and you
341 do not want to build the html documentation.
342 </para>
343
344 <para>
345 <parameter>--disable-debug</parameter>: Disables building debugging
346 symbols into the programs and libraries.
347 </para>
348
349 <para>
350 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
351 rendering via <filename class="libraryfile">libass</filename>.
352 </para>
353
354 <para>
355 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
356 highest-quality AAC audio encoding via <filename
357 class="libraryfile">libfdk-aac</filename>.
358 </para>
359
360 <para>
361 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
362 via <filename class="libraryfile">libmp3lame</filename>.
363 </para>
364
365 <para>
366 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
367 Theora video encoding via <filename
368 class="libraryfile">libvorbis</filename> and <filename
369 class="libraryfile">libtheora</filename>.
370 </para>
371
372 <para>
373 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
374 encoding via <filename class="libraryfile">libvorbis</filename> and
375 <filename class="libraryfile">libvpx</filename>.
376 </para>
377
378 <para>
379 <parameter>--enable-libx264</parameter>: Enables high-quality
380 H.264/MPEG-4 AVC encoding via <filename
381 class="libraryfile">libx264</filename>.
382 </para>
383
384 <para>
385 <parameter>--enable-libx265</parameter>: Enables high-quality
386 H.265/HEVC encoding via <filename
387 class="libraryfile">libx265</filename>.
388 </para>
389
390 <para>
391 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
392 Enables HTTPS protocol for network streams.
393 </para>
394
395 <para>
396 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
397 builds the <command>qt-faststart</command> program which can modify
398 QuickTime formatted movies (<filename class="extension">.mov</filename>
399 or <filename class="extension">.mp4</filename>) so that the header
400 information is located at the beginning of the file instead of the end.
401 This allows the movie file to begin playing before the entire file has
402 been downloaded.
403 </para>
404
405 <note>
406 <para>
407 Support for most of the dependency packages requires using options
408 passed to the <command>configure</command> script. View the output
409 from <command>./configure --help</command> for complete information
410 about enabling dependency packages.
411 </para>
412 </note>
413
414 </sect2>
415
416 <sect2 role="configuration">
417 <title>Configuring FFmpeg</title>
418
419 <sect3 id="ffmpeg-config">
420 <title>Config Files</title>
421
422 <para>
423 <filename>/etc/ffserver.conf</filename> and
424 <filename>~/.ffmpeg/ffserver-config</filename>
425 </para>
426
427 <indexterm zone="ffmpeg ffmpeg-config">
428 <primary
429 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
430 </indexterm>
431
432 <indexterm zone="ffmpeg ffmpeg-config">
433 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
434 </indexterm>
435
436 <para>
437 You'll find a sample <command>ffserver</command> configuration file at
438 <filename>doc/ffserver.conf</filename> in the source tree.
439 </para>
440
441 </sect3>
442
443 </sect2>
444
445 <sect2 role="content">
446 <title>Contents</title>
447
448 <segmentedlist>
449 <segtitle>Installed Programs</segtitle>
450 <segtitle>Installed Libraries</segtitle>
451 <segtitle>Installed Directories</segtitle>
452
453 <seglistitem>
454 <seg>
455 ffmpeg, ffplay, ffprobe, ffserver, and qt-faststart
456 </seg>
457 <seg>
458 libavcodec.so, libavdevice.so, libavfilter.so,
459 libavformat.so, libavutil.so, libpostproc.so,
460 libswresample.so, and libswscale.so
461 </seg>
462 <seg>
463 /usr/include/libav{codec,device,filter,format,util},
464 /usr/include/libpostproc,
465 /usr/include/libsw{resample,scale},
466 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
467 /usr/share/ffmpeg
468 </seg>
469 </seglistitem>
470 </segmentedlist>
471
472 <variablelist>
473 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
474 <?dbfo list-presentation="list"?>
475 <?dbhtml list-presentation="table"?>
476
477 <varlistentry id="ffmpeg-prog">
478 <term><command>ffmpeg</command></term>
479 <listitem>
480 <para>
481 is a command-line tool to convert video files, network streams and
482 input from a TV card to several video formats.
483 </para>
484 <indexterm zone="ffmpeg ffmpeg-prog">
485 <primary sortas="b-ffmpeg">ffmpeg</primary>
486 </indexterm>
487 </listitem>
488 </varlistentry>
489
490 <varlistentry id="ffplay">
491 <term><command>ffplay</command></term>
492 <listitem>
493 <para>
494 is a very simple and portable media player using the
495 <filename>ffmpeg</filename> libraries and the SDL library.
496 </para>
497 <indexterm zone="ffmpeg ffplay">
498 <primary sortas="b-ffplay">ffplay</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="ffprobe">
504 <term><command>ffprobe</command></term>
505 <listitem>
506 <para>
507 gathers information from multimedia streams and prints it in a human
508 and machine-readable fashion.
509 </para>
510 <indexterm zone="ffmpeg ffprobe">
511 <primary sortas="b-ffprobe">ffprobe</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="ffserver">
517 <term><command>ffserver</command></term>
518 <listitem>
519 <para>
520 is a streaming server for everything that <command>ffmpeg</command>
521 could use as input (files, streams, TV card input, webcam, etc).
522 </para>
523 <indexterm zone="ffmpeg ffserver">
524 <primary sortas="b-ffserver">ffserver</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529 <varlistentry id="qt-faststart">
530 <term><command>qt-faststart</command></term>
531 <listitem>
532 <para>
533 moves the index file to the front of quicktime (mov/mp4) videos.
534 </para>
535 <indexterm zone="ffmpeg qt-faststart">
536 <primary sortas="b-qt-faststart">qt-faststart</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="libavcodec">
542 <term><filename class="libraryfile">libavcodec.so</filename></term>
543 <listitem>
544 <para>
545 is a library containing the <application>FFmpeg</application> codecs
546 (both encoding and decoding).
547 </para>
548 <indexterm zone="ffmpeg libavcodec">
549 <primary sortas="c-libavcodec">libavcodec.so</primary>
550 </indexterm>
551 </listitem>
552 </varlistentry>
553
554 <varlistentry id="libavdevice">
555 <term><filename class="libraryfile">libavdevice.so</filename></term>
556 <listitem>
557 <para>
558 is the <application>FFmpeg</application> device handling library.
559 </para>
560 <indexterm zone="ffmpeg libavdevice">
561 <primary sortas="c-libavdevice">libavdevice.so</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="libavfilter">
567 <term><filename class="libraryfile">libavfilter.so</filename></term>
568 <listitem>
569 <para>
570 is a library of filters that can alter video or audio between the
571 decoder and the encoder (or output).
572 </para>
573 <indexterm zone="ffmpeg libavfilter">
574 <primary sortas="c-libavfilter">libavfilter.so</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="libavformat">
580 <term><filename class="libraryfile">libavformat.so</filename></term>
581 <listitem>
582 <para>
583 is a library containing the file formats handling (mux and demux
584 code for several formats) used by <command>ffplay</command> as well
585 as allowing the generation of audio or video streams.
586 </para>
587 <indexterm zone="ffmpeg libavformat">
588 <primary sortas="c-libavformat">libavformat.so</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="libavutil">
594 <term><filename class="libraryfile">libavutil.so</filename></term>
595 <listitem>
596 <para>
597 is the <application>FFmpeg</application> utility library.
598 </para>
599 <indexterm zone="ffmpeg libavutil">
600 <primary sortas="c-libavutil">libavutil.so</primary>
601 </indexterm>
602 </listitem>
603 </varlistentry>
604
605 <varlistentry id="libpostproc">
606 <term><filename class="libraryfile">libpostproc.so</filename></term>
607 <listitem>
608 <para>
609 is the <application>FFmpeg</application> post processing library.
610 </para>
611 <indexterm zone="ffmpeg libpostproc">
612 <primary sortas="c-libpostproc">libpostproc.so</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="libswresample">
618 <term><filename class="libraryfile">libswresample.so</filename></term>
619 <listitem>
620 <para>
621 is the <application>FFmpeg</application> audio rescaling library,
622 it contains functions for converting audio sample formats.
623 </para>
624 <indexterm zone="ffmpeg libswresample">
625 <primary sortas="c-libswresample">libswresample.so</primary>
626 </indexterm>
627 </listitem>
628 </varlistentry>
629
630 <varlistentry id="libswscale">
631 <term><filename class="libraryfile">libswscale.so</filename></term>
632 <listitem>
633 <para>
634 is the <application>FFmpeg</application> image rescaling library.
635 </para>
636 <indexterm zone="ffmpeg libswscale">
637 <primary sortas="c-libswscale">libswscale.so</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 </variablelist>
643
644 </sect2>
645
646</sect1>
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