source: multimedia/videoutils/ffmpeg.xml@ 0a76c13

10.0 10.1 11.0 7.10 7.8 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind ken/refactor-virt lazarus nosym perl-modules qt5new trunk xry111/git-date xry111/git-date-for-trunk xry111/git-date-test
Last change on this file since 0a76c13 was 0a76c13, checked in by Fernando de Oliveira <fernando@…>, 6 years ago
  • Update to sudo-1.8.14p2.
  • Update to ffmpeg-2.7.2.
  • Update to appstream-glib-0.4.1.
  • Update to postfix-3.0.2.
  • Update to gdk-pixbuf-2.31.5.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@16270 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.bz2">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "7eb2140bab9f0a8669b65b50c8e4cfb5">
10 <!ENTITY ffmpeg-size "7.8 MB">
11 <!ENTITY ffmpeg-buildsize "1.1 GB (with optional docs); additional 2.3 GB to run the FATE suite)">
12 <!ENTITY ffmpeg-time "1.8 SBU (with -j4 and optional docs); additional 2.8 SBU, with THREADS=4, to run the FATE suite, after sample files are downloaded">
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 &lfs77_checked; &gcc5_checked;
45
46 <bridgehead renderas="sect3">Package Information</bridgehead>
47 <itemizedlist spacing="compact">
48 <listitem>
49 <para>
50 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
51 </para>
52 </listitem>
53 <listitem>
54 <para>
55 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
56 </para>
57 </listitem>
58 <listitem>
59 <para>
60 Download MD5 sum: &ffmpeg-md5sum;
61 </para>
62 </listitem>
63 <listitem>
64 <para>
65 Download size: &ffmpeg-size;
66 </para>
67 </listitem>
68 <listitem>
69 <para>
70 Estimated disk space required: &ffmpeg-buildsize;
71 </para>
72 </listitem>
73 <listitem>
74 <para>
75 Estimated build time: &ffmpeg-time;
76 </para>
77 </listitem>
78 </itemizedlist>
79
80 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
81
82 <bridgehead renderas="sect4">Recommended</bridgehead>
83 <para role="recommended">
84 <xref linkend="libass"/>,
85 <xref linkend="fdk-aac"/>,
86 <xref linkend="freetype2"/>,
87 <xref linkend="lame"/>,
88 <xref linkend="libtheora"/>,
89 <xref linkend="libvorbis"/>,
90 <xref linkend="libvpx"/>,
91 <xref linkend="opus"/>,
92 <xref linkend="x264"/>, and
93 <xref linkend="yasm"/>
94 </para>
95
96 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
97 <para>
98 <xref linkend="alsa-lib"/>,
99 <xref linkend="libva"/>,
100 <xref linkend="libvdpau"/> (with the corresponding driver package), and
101 <xref linkend="sdl"/>
102 </para>
103
104 <bridgehead renderas="sect4">Optional</bridgehead>
105 <para role="optional">
106 <xref linkend="faac"/>,
107 <xref linkend="fontconfig"/>,
108 <xref linkend="libcdio"/> (to identify and play CDs),
109 <xref linkend="libwebp"/>,
110 <xref linkend="openjpeg"/>,
111 <xref linkend="openssl"/> or
112 <xref linkend="gnutls"/>,
113 <xref linkend="pulseaudio"/>,
114 <xref linkend="speex"/>,
115 <xref linkend="texlive"/> (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
116 <xref linkend="v4l-utils"/>,
117 <xref linkend="xvid"/>,
118 <xref linkend="x-window-system"/>,
119 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
120 <ulink url="https://files.dyne.org/frei0r/snapshots/">frei0r</ulink>,
121 <ulink url="http://www.quut.com/gsm/">GSM</ulink>,
122 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
123 <ulink url="http://www.ladspa.org/">LADSPA</ulink>,
124 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
125 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
126 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
127 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
128 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
129 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
130 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
131 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
132 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
133 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
134 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
135 <ulink url="http://www.libssh.org/">libssh</ulink>,
136 <ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),
137 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>,
138 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
139 <ulink url="http://opencv.org/">OpenCV</ulink>,
140 <ulink url="http://diracvideo.org/">Schroedinger</ulink>,
141 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
142 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
143 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
144 <ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and
145 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
146 </para>
147
148 <para condition="html" role="usernotes">
149 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
150 </para>
151 </sect2>
152
153 <sect2 role="installation">
154 <title>Installation of FFmpeg</title>
155
156<!--<para>
157 If <application>Xorg</application> is installed in a prefix other
158 than <filename class='directory'>/usr</filename>, the build will fail. Fix
159 this by issuing the following command:
160 </para>
161
162<screen><userinput>export LIBRARY_PATH=$XORG_PREFIX/lib</userinput></screen>
163-->
164 <para>
165 Install <application>FFmpeg</application> by running the following
166 commands:
167 </para>
168
169<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
170
171./configure --prefix=/usr \
172 --enable-gpl \
173 --enable-version3 \
174 --enable-nonfree \
175 --disable-static \
176 --enable-shared \
177 --disable-debug \
178 --enable-libass \
179 --enable-libfdk-aac \
180 --enable-libfreetype \
181 --enable-libmp3lame \
182 --enable-libopus \
183 --enable-libtheora \
184 --enable-libvorbis \
185 --enable-libvpx \
186 --enable-libx264 \
187 --enable-x11grab \
188 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
189
190make &amp;&amp;
191
192gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
193<!--
194unset LIBRARY_PATH</userinput></screen>-->
195
196 <para>
197 HTML documentation was built in the previous step. If you have
198 <xref linkend="texlive"/> installed and wish to build PDF and
199 Postscript versions of the documentation, issue the following commands:
200 </para>
201
202<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
203sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
204
205pushd doc &amp;&amp;
206for DOCNAME in `basename -s .html *.html`
207do
208 texi2pdf -b $DOCNAME.texi &amp;&amp;
209 texi2dvi -b $DOCNAME.texi &amp;&amp;
210
211 dvips -o $DOCNAME.ps \
212 $DOCNAME.dvi
213done &amp;&amp;
214popd &amp;&amp;
215unset DOCNAME</userinput></screen>
216
217 <para>
218 If you have <xref linkend="doxygen"/> installed and wish to create the API
219 documentation (takes about 350 MB of space), issue the command
220 <command>doxygen doc/Doxyfile</command>.
221 </para>
222
223 <para>
224 The fate-suite tests include comparisons with installed files, and should
225 not be run before the package is installed. Therefore, if you desire to
226 run them, instructions are given further below.
227 </para>
228
229 <para>
230 Now, as the <systemitem class="username">root</systemitem> user:
231 </para>
232
233<screen role="root"><userinput>make install &amp;&amp;
234
235install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
236install -v -m644 doc/*.txt \
237 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
238
239 <para>
240 If PDF and Postscript documentations were built, issue the following
241 commands, as the <systemitem class="username">root</systemitem> user, to
242 install them:
243 </para>
244
245<screen role="root"><userinput>install -v -m644 doc/*.pdf \
246 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
247install -v -m644 doc/*.ps \
248 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
249
250 <para>
251 If you used <command>doxygen</command> to create the API documentation,
252 install it (another 300 MB of space) by issuing the following commands
253 as the <systemitem class="username">root</systemitem> user:
254 </para>
255
256<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
257cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
258find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
259find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
260
261 <para>
262 To properly test the installation you must have <xref linkend="rsync"/>
263 installed and follow the instructions for the <ulink
264 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
265 Environment</ulink> (FATE). First, about 930 MB of sample files used to
266 run FATE are downloaded with the command:
267 </para>
268
269<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
270
271 <para>
272 The <filename class="directory">fate-suite</filename> directory is
273 created and the files are downloaded there. That command actually runs an
274 rsync command, to obtain the sample files. You may want to compress and
275 keep this directory for testing again, in another system, or when a new
276 version of ffmpeg is launched. Then, you unpack the sample files in the
277 source directory, and run, again, the <command>make fate-rsync
278 ...</command> command above, to sync with the repository. Now, the
279 download size and time are drastically reduced. Estimated values in
280 "Package Information" do not include the download SBU. Some samples may
281 have been removed, in the new version, so, in order to be sure local and
282 server fate samples are identical, when you use previously saved samples,
283 run the following command:
284 </para>
285
286<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
287 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
288
289 <para>
290 Next, FATE is executed, with the commands (you obtain a number of tests
291 larger than 2400):
292 </para>
293
294<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
295grep ^TEST ../fate.log | wc -l</userinput></screen>
296
297 <para>
298 where <replaceable>N</replaceable> is an integer,
299 <replaceable>N</replaceable> &le; number of threads in the system.
300 </para>
301
302 </sect2>
303
304 <sect2 role="commands">
305 <title>Command Explanations</title>
306
307 <para>
308 <command>sed -i ... configure</command>: This command adds the
309 <application>ALSA</application> library to the
310 <application>Flite</application> <envar>LDFLAGS</envar> variable and
311 enables the discovery of <application>Flite</application>.
312 </para>
313
314 <para>
315 <command>sed -i ... texi</command>: Fix some .texi files for
316 documentation builds.
317 </para>
318
319 <para>
320 <command>find ... ;</command>: Fix permissions of documentation files
321 and directories.
322 </para>
323
324 <para>
325 <option>--enable-libfreetype</option>: Enables
326 <application>Freetype</application> support.
327 </para>
328
329 <para>
330 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
331 permits support for postprocessing, swscale and many other features.
332 </para>
333
334 <para>
335 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
336 version 3 code.
337 </para>
338
339 <para>
340 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
341 Note that the resulting libraries and binaries will be unredistributable.
342 </para>
343
344 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
345 href="../../xincludes/static-libraries.xml"/>
346
347 <para>
348 <parameter>--enable-shared</parameter>: Enables building shared
349 libraries, otherwise only static libraries are built and installed.
350 </para>
351
352 <para>
353 <parameter>--disable-debug</parameter>: Disables building debugging
354 symbols into the programs and libraries.
355 </para>
356
357 <para>
358 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
359 rendering via <filename class="libraryfile">libass</filename>.
360 </para>
361
362 <para>
363 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
364 highest-quality AAC audio encoding via <filename
365 class="libraryfile">libfdk-aac</filename>.
366 </para>
367
368 <para>
369 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
370 via <filename class="libraryfile">libmp3lame</filename>.
371 </para>
372
373 <para>
374 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
375 Theora video encoding via <filename
376 class="libraryfile">libvorbis</filename> and <filename
377 class="libraryfile">libtheora</filename>.
378 </para>
379
380 <para>
381 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
382 encoding via <filename class="libraryfile">libvorbis</filename> and
383 <filename class="libraryfile">libvpx</filename>.
384 </para>
385
386 <para>
387 <parameter>--enable-libx264</parameter>: Enables high-quality
388 H.264/MPEG-4 AVC encoding via <filename
389 class="libraryfile">libx264</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
462 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/{libavcodec,libavdevice,libavfilter,libavformat},
471 /usr/include/{libavutil,libpostproc,libswresample,libswscale},
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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