source: multimedia/videoutils/ffmpeg.xml@ ba1ccf6

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 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 ba1ccf6 was ba1ccf6, checked in by Bruce Dubbs <bdubbs@…>, 8 years ago

Added ENTITY gcc8_checked to aid transition to gcc-6.1.0.

Update to ffmpeg-3.0.2. Required updates to
ptlib, libquicktime, opal, xine-lib, and transcode.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17324 af4574ff-66df-0310-9fd7-8a98e5e911e0

  • Property mode set to 100644
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 "beb5c69c671aba1386e7156fc2af1ab6">
10 <!ENTITY ffmpeg-size "7.1 MB">
11 <!ENTITY ffmpeg-buildsize "172 MB (add 1.6 GB for the FATE suite/tests
12 and 1.0 GB for the documentation)">
13 <!ENTITY ffmpeg-time "5.3 SBU (add 0.6 SBU for docs and 4.5 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 &lfs79_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="faac"/>,
110 <xref linkend="fontconfig"/>,
111 <xref linkend="frei0r"/>,
112 <xref linkend="libcdio"/> (to identify and play CDs),
113 <xref linkend="libwebp"/>,
114 <xref linkend="opencv"/>,
115 <xref linkend="openjpeg"/>,
116 <xref linkend="openssl"/> or
117 <xref linkend="gnutls"/>,
118 <xref linkend="pulseaudio"/>,
119 <xref linkend="speex"/>,
120 <xref linkend="texlive"/>
121 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
122 <xref linkend="v4l-utils"/>,
123 <xref linkend="xvid"/>,
124 <xref linkend="x-window-system"/>,
125 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
126 <ulink url="http://www.quut.com/gsm/">GSM</ulink>,
127 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
128 <!--<ulink url="http://www.ladspa.org/">LADSPA</ulink>,-->
129 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
130 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
131 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
132 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
133 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
134 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
135 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
136 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
137 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
138 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
139 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
140 <ulink url="http://www.libssh.org/">libssh</ulink>,
141 <!--<ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),-->
142 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>,
143 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
144 <!--<ulink url="http://diracvideo.org/">Schroedinger</ulink>,-->
145 <ulink url="http://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
146 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
147 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
148 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
149 <!--<ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and-->
150 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
151 </para>
152
153 <para condition="html" role="usernotes">
154 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
155 </para>
156 </sect2>
157
158 <sect2 role="installation">
159 <title>Installation of FFmpeg</title>
160
161 <para>
162 Install <application>FFmpeg</application> by running the following
163 commands:
164 </para>
165
166<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
167
168./configure --prefix=/usr \
169 --enable-gpl \
170 --enable-version3 \
171 --enable-nonfree \
172 --disable-static \
173 --enable-shared \
174 --disable-debug \
175 --enable-libass \
176 --enable-libfdk-aac \
177 --enable-libfreetype \
178 --enable-libmp3lame \
179 --enable-libopus \
180 --enable-libtheora \
181 --enable-libvorbis \
182 --enable-libvpx \
183 --enable-libx264 \
184 --enable-libx265 \
185 --enable-x11grab \
186 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
187
188make &amp;&amp;
189
190gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
191
192 <para>
193 HTML documentation was built in the previous step. If you have
194 <xref linkend="texlive"/> installed and wish to build PDF and
195 Postscript versions of the documentation, issue the following commands:
196 </para>
197
198<!-- sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
199sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp; -->
200<screen><userinput>pushd doc &amp;&amp;
201for DOCNAME in `basename -s .html *.html`
202do
203 texi2pdf -b $DOCNAME.texi &amp;&amp;
204 texi2dvi -b $DOCNAME.texi &amp;&amp;
205
206 dvips -o $DOCNAME.ps \
207 $DOCNAME.dvi
208done &amp;&amp;
209popd &amp;&amp;
210unset DOCNAME</userinput></screen>
211
212 <para>
213 If you have <xref linkend="doxygen"/> installed and wish to create the API
214 documentation (takes about 350 MB of space), issue the command
215 <command>doxygen doc/Doxyfile</command>.
216 </para>
217
218 <para>
219 The fate-suite tests include comparisons with installed files, and should
220 not be run before the package is installed. Therefore, if you desire to
221 run them, instructions are given further below.
222 </para>
223
224 <para>
225 Now, as the <systemitem class="username">root</systemitem> user:
226 </para>
227
228<screen role="root"><userinput>make install &amp;&amp;
229
230install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
231install -v -m644 doc/*.txt \
232 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
233
234 <para>
235 If PDF and Postscript documentations were built, issue the following
236 commands, as the <systemitem class="username">root</systemitem> user, to
237 install them:
238 </para>
239
240<screen role="root"><userinput>install -v -m644 doc/*.pdf \
241 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
242install -v -m644 doc/*.ps \
243 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
244
245 <para>
246 If you used <command>doxygen</command> to create the API documentation,
247 install it (another 300 MB of space) by issuing the following commands
248 as the <systemitem class="username">root</systemitem> user:
249 </para>
250
251<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
252cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
253find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
254find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
255
256 <para>
257 To properly test the installation you must have <xref linkend="rsync"/>
258 installed and follow the instructions for the <ulink
259 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
260 Environment</ulink> (FATE). First, about 958 MB of sample files used to
261 run FATE are downloaded with the command:
262 </para>
263
264<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
265
266 <para>
267 The <filename class="directory">fate-suite</filename> directory is
268 created and the files are downloaded there. That command actually runs an
269 rsync command, to obtain the sample files. You may want to compress and
270 keep this directory for testing again, in another system, or when a new
271 version of ffmpeg is launched. Then, you unpack the sample files in the
272 source directory, and run, again, the <command>make fate-rsync
273 ...</command> command above, to sync with the repository. Now, the
274 download size and time are drastically reduced. Estimated values in
275 "Package Information" do not include the download SBU. Some samples may
276 have been removed, in the new version, so, in order to be sure local and
277 server fate samples are identical, when you use previously saved samples,
278 run the following command:
279 </para>
280
281<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
282 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
283
284 <para>
285 Next, FATE is executed, with the commands (you obtain a number of tests
286 larger than 2500):
287 </para>
288
289<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
290grep ^TEST ../fate.log | wc -l</userinput></screen>
291
292 <para>
293 where <replaceable>N</replaceable> is an integer,
294 <replaceable>N</replaceable> &le; number of threads in the system.
295 </para>
296
297 </sect2>
298
299 <sect2 role="commands">
300 <title>Command Explanations</title>
301
302 <para>
303 <command>sed -i ... configure</command>: This command adds the
304 <application>ALSA</application> library to the
305 <application>Flite</application> <envar>LDFLAGS</envar> variable and
306 enables the discovery of <application>Flite</application>.
307 </para>
308
309 <para>
310 <command>sed -i ... texi</command>: Fix some .texi files for
311 documentation builds.
312 </para>
313
314 <para>
315 <command>find ... ;</command>: Fix permissions of documentation files
316 and directories.
317 </para>
318
319 <para>
320 <option>--enable-libfreetype</option>: Enables
321 <application>Freetype</application> support.
322 </para>
323
324 <para>
325 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
326 permits support for postprocessing, swscale and many other features.
327 </para>
328
329 <para>
330 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
331 version 3 code.
332 </para>
333
334 <para>
335 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
336 Note that the resulting libraries and binaries will be unredistributable.
337 </para>
338
339 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
340 href="../../xincludes/static-libraries.xml"/>
341
342 <para>
343 <parameter>--enable-shared</parameter>: Enables building shared
344 libraries, otherwise only static libraries are built and installed.
345 </para>
346
347 <para>
348 <parameter>--disable-debug</parameter>: Disables building debugging
349 symbols into the programs and libraries.
350 </para>
351
352 <para>
353 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
354 rendering via <filename class="libraryfile">libass</filename>.
355 </para>
356
357 <para>
358 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
359 highest-quality AAC audio encoding via <filename
360 class="libraryfile">libfdk-aac</filename>.
361 </para>
362
363 <para>
364 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
365 via <filename class="libraryfile">libmp3lame</filename>.
366 </para>
367
368 <para>
369 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
370 Theora video encoding via <filename
371 class="libraryfile">libvorbis</filename> and <filename
372 class="libraryfile">libtheora</filename>.
373 </para>
374
375 <para>
376 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
377 encoding via <filename class="libraryfile">libvorbis</filename> and
378 <filename class="libraryfile">libvpx</filename>.
379 </para>
380
381 <para>
382 <parameter>--enable-libx264</parameter>: Enables high-quality
383 H.264/MPEG-4 AVC encoding via <filename
384 class="libraryfile">libx264</filename>.
385 </para>
386
387 <para>
388 <parameter>--enable-libx265</parameter>: Enables high-quality
389 H.265/HEVC encoding via <filename
390 class="libraryfile">libx265</filename>.
391 </para>
392
393 <para>
394 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
395 </para>
396
397 <para>
398 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
399 Enables HTTPS protocol for network streams.
400 </para>
401
402 <para>
403 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
404 builds the <command>qt-faststart</command> program which can modify
405 QuickTime formatted movies (<filename class="extension">.mov</filename>
406 or <filename class="extension">.mp4</filename>) so that the header
407 information is located at the beginning of the file instead of the end.
408 This allows the movie file to begin playing before the entire file has
409 been downloaded.
410 </para>
411
412 <note>
413 <para>
414 Support for most of the dependency packages requires using options
415 passed to the <command>configure</command> script. View the output
416 from <command>./configure --help</command> for complete information
417 about enabling dependency packages.
418 </para>
419 </note>
420
421 </sect2>
422
423 <sect2 role="configuration">
424 <title>Configuring FFmpeg</title>
425
426 <sect3 id="ffmpeg-config">
427 <title>Config Files</title>
428
429 <para>
430 <filename>/etc/ffserver.conf</filename> and
431 <filename>~/.ffmpeg/ffserver-config</filename>
432 </para>
433
434 <indexterm zone="ffmpeg ffmpeg-config">
435 <primary
436 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
437 </indexterm>
438
439 <indexterm zone="ffmpeg ffmpeg-config">
440 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
441 </indexterm>
442
443 <para>
444 You'll find a sample <command>ffserver</command> configuration file at
445 <filename>doc/ffserver.conf</filename> in the source tree.
446 </para>
447
448 </sect3>
449
450 </sect2>
451
452 <sect2 role="content">
453 <title>Contents</title>
454
455 <segmentedlist>
456 <segtitle>Installed Programs</segtitle>
457 <segtitle>Installed Libraries</segtitle>
458 <segtitle>Installed Directories</segtitle>
459
460 <seglistitem>
461 <seg>
462 ffmpeg, ffplay, ffprobe, ffserver, and qt-faststart
463 </seg>
464 <seg>
465 libavcodec.so, libavdevice.so, libavfilter.so,
466 libavformat.so, libavutil.so, libpostproc.so,
467 libswresample, and libswscale.so
468 </seg>
469 <seg>
470 /usr/include/libav{codec,device,filter,format,util},
471 /usr/include/libpostproc,
472 /usr/include/libsw{resample,scale},
473 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
474 /usr/share/ffmpeg
475 </seg>
476 </seglistitem>
477 </segmentedlist>
478
479 <variablelist>
480 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
481 <?dbfo list-presentation="list"?>
482 <?dbhtml list-presentation="table"?>
483
484 <varlistentry id="ffmpeg-prog">
485 <term><command>ffmpeg</command></term>
486 <listitem>
487 <para>
488 is a command-line tool to convert video files, network streams and
489 input from a TV card to several video formats.
490 </para>
491 <indexterm zone="ffmpeg ffmpeg-prog">
492 <primary sortas="b-ffmpeg">ffmpeg</primary>
493 </indexterm>
494 </listitem>
495 </varlistentry>
496
497 <varlistentry id="ffplay">
498 <term><command>ffplay</command></term>
499 <listitem>
500 <para>
501 is a very simple and portable media player using the
502 <filename>ffmpeg</filename> libraries and the SDL library.
503 </para>
504 <indexterm zone="ffmpeg ffplay">
505 <primary sortas="b-ffplay">ffplay</primary>
506 </indexterm>
507 </listitem>
508 </varlistentry>
509
510 <varlistentry id="ffprobe">
511 <term><command>ffprobe</command></term>
512 <listitem>
513 <para>
514 gathers information from multimedia streams and prints it in a human
515 and machine-readable fashion.
516 </para>
517 <indexterm zone="ffmpeg ffprobe">
518 <primary sortas="b-ffprobe">ffprobe</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="ffserver">
524 <term><command>ffserver</command></term>
525 <listitem>
526 <para>
527 is a streaming server for everything that <command>ffmpeg</command>
528 could use as input (files, streams, TV card input, webcam, etc).
529 </para>
530 <indexterm zone="ffmpeg ffserver">
531 <primary sortas="b-ffserver">ffserver</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536 <varlistentry id="qt-faststart">
537 <term><command>qt-faststart</command></term>
538 <listitem>
539 <para>
540 moves the index file to the front of quicktime (mov/mp4) videos.
541 </para>
542 <indexterm zone="ffmpeg qt-faststart">
543 <primary sortas="b-qt-faststart">qt-faststart</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="libavcodec">
549 <term><filename class="libraryfile">libavcodec.so</filename></term>
550 <listitem>
551 <para>
552 is a library containing the <application>FFmpeg</application> codecs
553 (both encoding and decoding).
554 </para>
555 <indexterm zone="ffmpeg libavcodec">
556 <primary sortas="c-libavcodec">libavcodec.so</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="libavdevice">
562 <term><filename class="libraryfile">libavdevice.so</filename></term>
563 <listitem>
564 <para>
565 is the <application>FFmpeg</application> device handling library.
566 </para>
567 <indexterm zone="ffmpeg libavdevice">
568 <primary sortas="c-libavdevice">libavdevice.so</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="libavfilter">
574 <term><filename class="libraryfile">libavfilter.so</filename></term>
575 <listitem>
576 <para>
577 is a library of filters that can alter video or audio between the
578 decoder and the encoder (or output).
579 </para>
580 <indexterm zone="ffmpeg libavfilter">
581 <primary sortas="c-libavfilter">libavfilter.so</primary>
582 </indexterm>
583 </listitem>
584 </varlistentry>
585
586 <varlistentry id="libavformat">
587 <term><filename class="libraryfile">libavformat.so</filename></term>
588 <listitem>
589 <para>
590 is a library containing the file formats handling (mux and demux
591 code for several formats) used by <command>ffplay</command> as well
592 as allowing the generation of audio or video streams.
593 </para>
594 <indexterm zone="ffmpeg libavformat">
595 <primary sortas="c-libavformat">libavformat.so</primary>
596 </indexterm>
597 </listitem>
598 </varlistentry>
599
600 <varlistentry id="libavutil">
601 <term><filename class="libraryfile">libavutil.so</filename></term>
602 <listitem>
603 <para>
604 is the <application>FFmpeg</application> utility library.
605 </para>
606 <indexterm zone="ffmpeg libavutil">
607 <primary sortas="c-libavutil">libavutil.so</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="libpostproc">
613 <term><filename class="libraryfile">libpostproc.so</filename></term>
614 <listitem>
615 <para>
616 is the <application>FFmpeg</application> post processing library.
617 </para>
618 <indexterm zone="ffmpeg libpostproc">
619 <primary sortas="c-libpostproc">libpostproc.so</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 <varlistentry id="libswresample">
625 <term><filename class="libraryfile">libswresample.so</filename></term>
626 <listitem>
627 <para>
628 is the <application>FFmpeg</application> audio rescaling library,
629 it contains functions for converting audio sample formats.
630 </para>
631 <indexterm zone="ffmpeg libswresample">
632 <primary sortas="c-libswresample">libswresample.so</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="libswscale">
638 <term><filename class="libraryfile">libswscale.so</filename></term>
639 <listitem>
640 <para>
641 is the <application>FFmpeg</application> image rescaling library.
642 </para>
643 <indexterm zone="ffmpeg libswscale">
644 <primary sortas="c-libswscale">libswscale.so</primary>
645 </indexterm>
646 </listitem>
647 </varlistentry>
648
649 </variablelist>
650
651 </sect2>
652
653</sect1>
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