source: multimedia/videoutils/ffmpeg.xml@ c840bd37

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 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 c840bd37 was c840bd37, checked in by Bruce Dubbs <bdubbs@…>, 7 years ago

Update to jasper-1.900.16.
Update to xapian-1.4.1.
Update to libarchive-3.2.2.
Update to ffmpeg-3.2.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17923 af4574ff-66df-0310-9fd7-8a98e5e911e0

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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 "3c065fb5baae1aeb1494a09ac984b2de">
10 <!ENTITY ffmpeg-size "7.6 MB">
11 <!ENTITY ffmpeg-buildsize "142 MB (add 3.0 GB for the FATE suite/tests
12 and 1.0 GB for the documentation)">
13 <!ENTITY ffmpeg-time "4.4 SBU (add 0.6 SBU for docs and 5.0 SBU
14 to run the FATE suite after sample files are downloaded)">
15]>
16
17<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
18 <?dbhtml filename="ffmpeg.html"?>
19
20 <sect1info>
21 <othername>$LastChangedBy$</othername>
22 <date>$Date$</date>
23 </sect1info>
24
25 <title>FFmpeg-&ffmpeg-version;</title>
26
27 <indexterm zone="ffmpeg">
28 <primary sortas="a-FFmpeg">FFmpeg</primary>
29 </indexterm>
30
31 <sect2 role="package">
32 <title>Introduction to FFmpeg</title>
33
34 <para>
35 <application>FFmpeg</application> is a solution to record, convert and
36 stream audio and video. It is a very fast video and audio converter and it
37 can also acquire from a live audio/video source. Designed to be intuitive,
38 the command-line interface (<command>ffmpeg</command>) tries to figure out
39 all the parameters, when possible. <application>FFmpeg</application> can
40 also convert from any sample rate to any other, and resize video on the
41 fly with a high quality polyphase filter.
42 <application>FFmpeg</application> can use a Video4Linux compatible video
43 source and any Open Sound System audio source.
44 </para>
45
46 &lfs7a_checked;
47
48 <bridgehead renderas="sect3">Package Information</bridgehead>
49 <itemizedlist spacing="compact">
50 <listitem>
51 <para>
52 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
53 </para>
54 </listitem>
55 <listitem>
56 <para>
57 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
58 </para>
59 </listitem>
60 <listitem>
61 <para>
62 Download MD5 sum: &ffmpeg-md5sum;
63 </para>
64 </listitem>
65 <listitem>
66 <para>
67 Download size: &ffmpeg-size;
68 </para>
69 </listitem>
70 <listitem>
71 <para>
72 Estimated disk space required: &ffmpeg-buildsize;
73 </para>
74 </listitem>
75 <listitem>
76 <para>
77 Estimated build time: &ffmpeg-time;
78 </para>
79 </listitem>
80 </itemizedlist>
81
82 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
83
84 <bridgehead renderas="sect4">Recommended</bridgehead>
85 <para role="recommended">
86 <xref linkend="libass"/>,
87 <xref linkend="fdk-aac"/>,
88 <xref linkend="freetype2"/>,
89 <xref linkend="lame"/>,
90 <xref linkend="libtheora"/>,
91 <xref linkend="libvorbis"/>,
92 <xref linkend="libvpx"/>,
93 <xref linkend="opus"/>,
94 <xref linkend="x264"/>,
95 <xref linkend="x265"/>, and
96 <xref linkend="yasm"/>
97 </para>
98
99 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
100 <para>
101 <xref linkend="alsa-lib"/>,
102 <xref linkend="libva"/>,
103 <xref linkend="libvdpau"/> (with the corresponding driver package), and
104 <xref linkend="sdl"/>
105 </para>
106
107 <bridgehead renderas="sect4">Optional</bridgehead>
108 <para role="optional">
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://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
145 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
146 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
147 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
148 <!--<ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and-->
149 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
150 </para>
151
152 <para condition="html" role="usernotes">
153 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
154 </para>
155 </sect2>
156
157 <sect2 role="installation">
158 <title>Installation of FFmpeg</title>
159
160 <para>
161 Install <application>FFmpeg</application> by running the following
162 commands:
163 </para>
164
165<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
166
167./configure --prefix=/usr \
168 --enable-gpl \
169 --enable-version3 \
170 --enable-nonfree \
171 --disable-static \
172 --enable-shared \
173 --disable-debug \
174 --enable-libass \
175 --enable-libfdk-aac \
176 --enable-libfreetype \
177 --enable-libmp3lame \
178 --enable-libopus \
179 --enable-libtheora \
180 --enable-libvorbis \
181 --enable-libvpx \
182 --enable-libx264 \
183 --enable-libx265 \
184 --enable-x11grab \
185 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
186
187make &amp;&amp;
188
189gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
190
191 <para>
192 HTML documentation was built in the previous step. If you have
193 <xref linkend="texlive"/> installed and wish to build PDF and
194 Postscript versions of the documentation, issue the following commands:
195 </para>
196
197<!-- sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
198sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp; -->
199<screen><userinput>pushd doc &amp;&amp;
200for DOCNAME in `basename -s .html *.html`
201do
202 texi2pdf -b $DOCNAME.texi &amp;&amp;
203 texi2dvi -b $DOCNAME.texi &amp;&amp;
204
205 dvips -o $DOCNAME.ps \
206 $DOCNAME.dvi
207done &amp;&amp;
208popd &amp;&amp;
209unset DOCNAME</userinput></screen>
210
211 <para>
212 If you have <xref linkend="doxygen"/> installed and wish to create the API
213 documentation (takes about 350 MB of space), issue the command
214 <command>doxygen doc/Doxyfile</command>.
215 </para>
216
217 <para>
218 The fate-suite tests include comparisons with installed files, and should
219 not be run before the package is installed. Therefore, if you desire to
220 run them, instructions are given further below.
221 </para>
222
223 <para>
224 Now, as the <systemitem class="username">root</systemitem> user:
225 </para>
226
227<screen role="root"><userinput>make install &amp;&amp;
228
229install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
230install -v -m644 doc/*.txt \
231 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
232
233 <para>
234 If PDF and Postscript documentations were built, issue the following
235 commands, as the <systemitem class="username">root</systemitem> user, to
236 install them:
237 </para>
238
239<screen role="root"><userinput>install -v -m644 doc/*.pdf \
240 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
241install -v -m644 doc/*.ps \
242 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
243
244 <para>
245 If you used <command>doxygen</command> to create the API documentation,
246 install it (another 300 MB of space) by issuing the following commands
247 as the <systemitem class="username">root</systemitem> user:
248 </para>
249
250<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
251cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
252find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
253find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
254
255 <para>
256 To properly test the installation you must have <xref linkend="rsync"/>
257 installed and follow the instructions for the <ulink
258 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
259 Environment</ulink> (FATE). First, about 958 MB of sample files used to
260 run FATE are downloaded with the command:
261 </para>
262
263<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
264
265 <para>
266 The <filename class="directory">fate-suite</filename> directory is
267 created and the files are downloaded there. That command actually runs an
268 rsync command, to obtain the sample files. You may want to compress and
269 keep this directory for testing again, in another system, or when a new
270 version of ffmpeg is launched. Then, you unpack the sample files in the
271 source directory, and run, again, the <command>make fate-rsync
272 ...</command> command above, to sync with the repository. Now, the
273 download size and time are drastically reduced. Estimated values in
274 "Package Information" do not include the download SBU. Some samples may
275 have been removed, in the new version, so, in order to be sure local and
276 server fate samples are identical, when you use previously saved samples,
277 run the following command:
278 </para>
279
280<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
281 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
282
283 <para>
284 Next, FATE is executed, with the commands (you obtain a number of tests
285 larger than 3000):
286 </para>
287
288<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
289grep ^TEST ../fate.log | wc -l</userinput></screen>
290
291 <para>
292 where <replaceable>N</replaceable> is an integer,
293 <replaceable>N</replaceable> &le; number of cores in the system.
294 </para>
295
296 </sect2>
297
298 <sect2 role="commands">
299 <title>Command Explanations</title>
300
301 <para>
302 <command>sed -i ... configure</command>: This command adds the
303 <application>ALSA</application> library to the
304 <application>Flite</application> <envar>LDFLAGS</envar> variable and
305 enables the discovery of <application>Flite</application>.
306 </para>
307
308 <para>
309 <command>sed -i ... texi</command>: Fix some .texi files for
310 documentation builds.
311 </para>
312
313 <para>
314 <command>find ... ;</command>: Fix permissions of documentation files
315 and directories.
316 </para>
317
318 <para>
319 <parameter>--enable-libfreetype</parameter>: Enables
320 <application>Freetype</application> support.
321 </para>
322
323 <para>
324 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
325 permits support for postprocessing, swscale and many other features.
326 </para>
327
328 <para>
329 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
330 version 3 code.
331 </para>
332
333 <para>
334 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
335 Note that the resulting libraries and binaries will be unredistributable.
336 </para>
337
338 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
339 href="../../xincludes/static-libraries.xml"/>
340
341 <para>
342 <parameter>--enable-shared</parameter>: Enables building shared
343 libraries, otherwise only static libraries are built and installed.
344 </para>
345
346 <para>
347 <parameter>--disable-debug</parameter>: Disables building debugging
348 symbols into the programs and libraries.
349 </para>
350
351 <para>
352 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
353 rendering via <filename class="libraryfile">libass</filename>.
354 </para>
355
356 <para>
357 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
358 highest-quality AAC audio encoding via <filename
359 class="libraryfile">libfdk-aac</filename>.
360 </para>
361
362 <para>
363 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
364 via <filename class="libraryfile">libmp3lame</filename>.
365 </para>
366
367 <para>
368 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
369 Theora video encoding via <filename
370 class="libraryfile">libvorbis</filename> and <filename
371 class="libraryfile">libtheora</filename>.
372 </para>
373
374 <para>
375 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
376 encoding via <filename class="libraryfile">libvorbis</filename> and
377 <filename class="libraryfile">libvpx</filename>.
378 </para>
379
380 <para>
381 <parameter>--enable-libx264</parameter>: Enables high-quality
382 H.264/MPEG-4 AVC encoding via <filename
383 class="libraryfile">libx264</filename>.
384 </para>
385
386 <para>
387 <parameter>--enable-libx265</parameter>: Enables high-quality
388 H.265/HEVC encoding via <filename
389 class="libraryfile">libx265</filename>.
390 </para>
391
392 <para>
393 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
394 </para>
395
396 <para>
397 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
398 Enables HTTPS protocol for network streams.
399 </para>
400
401 <para>
402 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
403 builds the <command>qt-faststart</command> program which can modify
404 QuickTime formatted movies (<filename class="extension">.mov</filename>
405 or <filename class="extension">.mp4</filename>) so that the header
406 information is located at the beginning of the file instead of the end.
407 This allows the movie file to begin playing before the entire file has
408 been downloaded.
409 </para>
410
411 <note>
412 <para>
413 Support for most of the dependency packages requires using options
414 passed to the <command>configure</command> script. View the output
415 from <command>./configure --help</command> for complete information
416 about enabling dependency packages.
417 </para>
418 </note>
419
420 </sect2>
421
422 <sect2 role="configuration">
423 <title>Configuring FFmpeg</title>
424
425 <sect3 id="ffmpeg-config">
426 <title>Config Files</title>
427
428 <para>
429 <filename>/etc/ffserver.conf</filename> and
430 <filename>~/.ffmpeg/ffserver-config</filename>
431 </para>
432
433 <indexterm zone="ffmpeg ffmpeg-config">
434 <primary
435 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
436 </indexterm>
437
438 <indexterm zone="ffmpeg ffmpeg-config">
439 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
440 </indexterm>
441
442 <para>
443 You'll find a sample <command>ffserver</command> configuration file at
444 <filename>doc/ffserver.conf</filename> in the source tree.
445 </para>
446
447 </sect3>
448
449 </sect2>
450
451 <sect2 role="content">
452 <title>Contents</title>
453
454 <segmentedlist>
455 <segtitle>Installed Programs</segtitle>
456 <segtitle>Installed Libraries</segtitle>
457 <segtitle>Installed Directories</segtitle>
458
459 <seglistitem>
460 <seg>
461 ffmpeg, ffplay, ffprobe, ffserver, and qt-faststart
462 </seg>
463 <seg>
464 libavcodec.so, libavdevice.so, libavfilter.so,
465 libavformat.so, libavutil.so, libpostproc.so,
466 libswresample.so, and libswscale.so
467 </seg>
468 <seg>
469 /usr/include/libav{codec,device,filter,format,util},
470 /usr/include/libpostproc,
471 /usr/include/libsw{resample,scale},
472 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
473 /usr/share/ffmpeg
474 </seg>
475 </seglistitem>
476 </segmentedlist>
477
478 <variablelist>
479 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
480 <?dbfo list-presentation="list"?>
481 <?dbhtml list-presentation="table"?>
482
483 <varlistentry id="ffmpeg-prog">
484 <term><command>ffmpeg</command></term>
485 <listitem>
486 <para>
487 is a command-line tool to convert video files, network streams and
488 input from a TV card to several video formats.
489 </para>
490 <indexterm zone="ffmpeg ffmpeg-prog">
491 <primary sortas="b-ffmpeg">ffmpeg</primary>
492 </indexterm>
493 </listitem>
494 </varlistentry>
495
496 <varlistentry id="ffplay">
497 <term><command>ffplay</command></term>
498 <listitem>
499 <para>
500 is a very simple and portable media player using the
501 <filename>ffmpeg</filename> libraries and the SDL library.
502 </para>
503 <indexterm zone="ffmpeg ffplay">
504 <primary sortas="b-ffplay">ffplay</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="ffprobe">
510 <term><command>ffprobe</command></term>
511 <listitem>
512 <para>
513 gathers information from multimedia streams and prints it in a human
514 and machine-readable fashion.
515 </para>
516 <indexterm zone="ffmpeg ffprobe">
517 <primary sortas="b-ffprobe">ffprobe</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
522 <varlistentry id="ffserver">
523 <term><command>ffserver</command></term>
524 <listitem>
525 <para>
526 is a streaming server for everything that <command>ffmpeg</command>
527 could use as input (files, streams, TV card input, webcam, etc).
528 </para>
529 <indexterm zone="ffmpeg ffserver">
530 <primary sortas="b-ffserver">ffserver</primary>
531 </indexterm>
532 </listitem>
533 </varlistentry>
534
535 <varlistentry id="qt-faststart">
536 <term><command>qt-faststart</command></term>
537 <listitem>
538 <para>
539 moves the index file to the front of quicktime (mov/mp4) videos.
540 </para>
541 <indexterm zone="ffmpeg qt-faststart">
542 <primary sortas="b-qt-faststart">qt-faststart</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="libavcodec">
548 <term><filename class="libraryfile">libavcodec.so</filename></term>
549 <listitem>
550 <para>
551 is a library containing the <application>FFmpeg</application> codecs
552 (both encoding and decoding).
553 </para>
554 <indexterm zone="ffmpeg libavcodec">
555 <primary sortas="c-libavcodec">libavcodec.so</primary>
556 </indexterm>
557 </listitem>
558 </varlistentry>
559
560 <varlistentry id="libavdevice">
561 <term><filename class="libraryfile">libavdevice.so</filename></term>
562 <listitem>
563 <para>
564 is the <application>FFmpeg</application> device handling library.
565 </para>
566 <indexterm zone="ffmpeg libavdevice">
567 <primary sortas="c-libavdevice">libavdevice.so</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
572 <varlistentry id="libavfilter">
573 <term><filename class="libraryfile">libavfilter.so</filename></term>
574 <listitem>
575 <para>
576 is a library of filters that can alter video or audio between the
577 decoder and the encoder (or output).
578 </para>
579 <indexterm zone="ffmpeg libavfilter">
580 <primary sortas="c-libavfilter">libavfilter.so</primary>
581 </indexterm>
582 </listitem>
583 </varlistentry>
584
585 <varlistentry id="libavformat">
586 <term><filename class="libraryfile">libavformat.so</filename></term>
587 <listitem>
588 <para>
589 is a library containing the file formats handling (mux and demux
590 code for several formats) used by <command>ffplay</command> as well
591 as allowing the generation of audio or video streams.
592 </para>
593 <indexterm zone="ffmpeg libavformat">
594 <primary sortas="c-libavformat">libavformat.so</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598
599 <varlistentry id="libavutil">
600 <term><filename class="libraryfile">libavutil.so</filename></term>
601 <listitem>
602 <para>
603 is the <application>FFmpeg</application> utility library.
604 </para>
605 <indexterm zone="ffmpeg libavutil">
606 <primary sortas="c-libavutil">libavutil.so</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="libpostproc">
612 <term><filename class="libraryfile">libpostproc.so</filename></term>
613 <listitem>
614 <para>
615 is the <application>FFmpeg</application> post processing library.
616 </para>
617 <indexterm zone="ffmpeg libpostproc">
618 <primary sortas="c-libpostproc">libpostproc.so</primary>
619 </indexterm>
620 </listitem>
621 </varlistentry>
622
623 <varlistentry id="libswresample">
624 <term><filename class="libraryfile">libswresample.so</filename></term>
625 <listitem>
626 <para>
627 is the <application>FFmpeg</application> audio rescaling library,
628 it contains functions for converting audio sample formats.
629 </para>
630 <indexterm zone="ffmpeg libswresample">
631 <primary sortas="c-libswresample">libswresample.so</primary>
632 </indexterm>
633 </listitem>
634 </varlistentry>
635
636 <varlistentry id="libswscale">
637 <term><filename class="libraryfile">libswscale.so</filename></term>
638 <listitem>
639 <para>
640 is the <application>FFmpeg</application> image rescaling library.
641 </para>
642 <indexterm zone="ffmpeg libswscale">
643 <primary sortas="c-libswscale">libswscale.so</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 </variablelist>
649
650 </sect2>
651
652</sect1>
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