source: multimedia/videoutils/ffmpeg.xml@ 1fa4314

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind kea ken/TL2024 ken/inkscape-core-mods ken/tuningfonts lazarus lxqt nosym perl-modules plabs/newcss plabs/python-mods python3.11 qt5new rahul/power-profiles-daemon renodr/vulkan-addition trunk upgradedb xry111/intltool xry111/llvm18 xry111/soup3 xry111/test-20220226 xry111/xf86-video-removal
Last change on this file since 1fa4314 was 1fa4314, checked in by Igor Živković <igor@…>, 9 years ago

Update to ffmpeg-2.8.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@16524 af4574ff-66df-0310-9fd7-8a98e5e911e0

  • Property mode set to 100644
File size: 23.4 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 "142 MB (additional 2.3 GB to run the FATE suite)">
12 <!ENTITY ffmpeg-time "5.2 SBU (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 &lfs78_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"/>,
93 <xref linkend="x265"/>, and
94 <xref linkend="yasm"/>
95 </para>
96
97 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
98 <para>
99 <xref linkend="alsa-lib"/>,
100 <xref linkend="libva"/>,
101 <xref linkend="libvdpau"/> (with the corresponding driver package), and
102 <xref linkend="sdl"/>
103 </para>
104
105 <bridgehead renderas="sect4">Optional</bridgehead>
106 <para role="optional">
107 <xref linkend="faac"/>,
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://www.twolame.org/">TwoLAME</ulink>,
144 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
145 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
146 <ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and
147 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
148 </para>
149
150 <para condition="html" role="usernotes">
151 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
152 </para>
153 </sect2>
154
155 <sect2 role="installation">
156 <title>Installation of FFmpeg</title>
157
158<!--<para>
159 If <application>Xorg</application> is installed in a prefix other
160 than <filename class='directory'>/usr</filename>, the build will fail. Fix
161 this by issuing the following command:
162 </para>
163
164<screen><userinput>export LIBRARY_PATH=$XORG_PREFIX/lib</userinput></screen>
165-->
166 <para>
167 Install <application>FFmpeg</application> by running the following
168 commands:
169 </para>
170
171<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
172
173./configure --prefix=/usr \
174 --enable-gpl \
175 --enable-version3 \
176 --enable-nonfree \
177 --disable-static \
178 --enable-shared \
179 --disable-debug \
180 --enable-libass \
181 --enable-libfdk-aac \
182 --enable-libfreetype \
183 --enable-libmp3lame \
184 --enable-libopus \
185 --enable-libtheora \
186 --enable-libvorbis \
187 --enable-libvpx \
188 --enable-libx264 \
189 --enable-libx265 \
190 --enable-x11grab \
191 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
192
193make &amp;&amp;
194
195gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
196<!--
197unset LIBRARY_PATH</userinput></screen>-->
198
199 <para>
200 HTML documentation was built in the previous step. If you have
201 <xref linkend="texlive"/> installed and wish to build PDF and
202 Postscript versions of the documentation, issue the following commands:
203 </para>
204
205<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
206sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
207
208pushd doc &amp;&amp;
209for DOCNAME in `basename -s .html *.html`
210do
211 texi2pdf -b $DOCNAME.texi &amp;&amp;
212 texi2dvi -b $DOCNAME.texi &amp;&amp;
213
214 dvips -o $DOCNAME.ps \
215 $DOCNAME.dvi
216done &amp;&amp;
217popd &amp;&amp;
218unset DOCNAME</userinput></screen>
219
220 <para>
221 If you have <xref linkend="doxygen"/> installed and wish to create the API
222 documentation (takes about 350 MB of space), issue the command
223 <command>doxygen doc/Doxyfile</command>.
224 </para>
225
226 <para>
227 The fate-suite tests include comparisons with installed files, and should
228 not be run before the package is installed. Therefore, if you desire to
229 run them, instructions are given further below.
230 </para>
231
232 <para>
233 Now, as the <systemitem class="username">root</systemitem> user:
234 </para>
235
236<screen role="root"><userinput>make install &amp;&amp;
237
238install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
239install -v -m644 doc/*.txt \
240 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
241
242 <para>
243 If PDF and Postscript documentations were built, issue the following
244 commands, as the <systemitem class="username">root</systemitem> user, to
245 install them:
246 </para>
247
248<screen role="root"><userinput>install -v -m644 doc/*.pdf \
249 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
250install -v -m644 doc/*.ps \
251 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
252
253 <para>
254 If you used <command>doxygen</command> to create the API documentation,
255 install it (another 300 MB of space) by issuing the following commands
256 as the <systemitem class="username">root</systemitem> user:
257 </para>
258
259<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
260cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
261find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
262find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
263
264 <para>
265 To properly test the installation you must have <xref linkend="rsync"/>
266 installed and follow the instructions for the <ulink
267 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
268 Environment</ulink> (FATE). First, about 930 MB of sample files used to
269 run FATE are downloaded with the command:
270 </para>
271
272<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
273
274 <para>
275 The <filename class="directory">fate-suite</filename> directory is
276 created and the files are downloaded there. That command actually runs an
277 rsync command, to obtain the sample files. You may want to compress and
278 keep this directory for testing again, in another system, or when a new
279 version of ffmpeg is launched. Then, you unpack the sample files in the
280 source directory, and run, again, the <command>make fate-rsync
281 ...</command> command above, to sync with the repository. Now, the
282 download size and time are drastically reduced. Estimated values in
283 "Package Information" do not include the download SBU. Some samples may
284 have been removed, in the new version, so, in order to be sure local and
285 server fate samples are identical, when you use previously saved samples,
286 run the following command:
287 </para>
288
289<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
290 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
291
292 <para>
293 Next, FATE is executed, with the commands (you obtain a number of tests
294 larger than 2400):
295 </para>
296
297<screen><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
298grep ^TEST ../fate.log | wc -l</userinput></screen>
299
300 <para>
301 where <replaceable>N</replaceable> is an integer,
302 <replaceable>N</replaceable> &le; number of threads in the system.
303 </para>
304
305 </sect2>
306
307 <sect2 role="commands">
308 <title>Command Explanations</title>
309
310 <para>
311 <command>sed -i ... configure</command>: This command adds the
312 <application>ALSA</application> library to the
313 <application>Flite</application> <envar>LDFLAGS</envar> variable and
314 enables the discovery of <application>Flite</application>.
315 </para>
316
317 <para>
318 <command>sed -i ... texi</command>: Fix some .texi files for
319 documentation builds.
320 </para>
321
322 <para>
323 <command>find ... ;</command>: Fix permissions of documentation files
324 and directories.
325 </para>
326
327 <para>
328 <option>--enable-libfreetype</option>: Enables
329 <application>Freetype</application> support.
330 </para>
331
332 <para>
333 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
334 permits support for postprocessing, swscale and many other features.
335 </para>
336
337 <para>
338 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
339 version 3 code.
340 </para>
341
342 <para>
343 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
344 Note that the resulting libraries and binaries will be unredistributable.
345 </para>
346
347 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
348 href="../../xincludes/static-libraries.xml"/>
349
350 <para>
351 <parameter>--enable-shared</parameter>: Enables building shared
352 libraries, otherwise only static libraries are built and installed.
353 </para>
354
355 <para>
356 <parameter>--disable-debug</parameter>: Disables building debugging
357 symbols into the programs and libraries.
358 </para>
359
360 <para>
361 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
362 rendering via <filename class="libraryfile">libass</filename>.
363 </para>
364
365 <para>
366 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
367 highest-quality AAC audio encoding via <filename
368 class="libraryfile">libfdk-aac</filename>.
369 </para>
370
371 <para>
372 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
373 via <filename class="libraryfile">libmp3lame</filename>.
374 </para>
375
376 <para>
377 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
378 Theora video encoding via <filename
379 class="libraryfile">libvorbis</filename> and <filename
380 class="libraryfile">libtheora</filename>.
381 </para>
382
383 <para>
384 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
385 encoding via <filename class="libraryfile">libvorbis</filename> and
386 <filename class="libraryfile">libvpx</filename>.
387 </para>
388
389 <para>
390 <parameter>--enable-libx264</parameter>: Enables high-quality
391 H.264/MPEG-4 AVC encoding via <filename
392 class="libraryfile">libx264</filename>.
393 </para>
394
395 <para>
396 <parameter>--enable-libx265</parameter>: Enables high-quality
397 H.265/HEVC encoding via <filename
398 class="libraryfile">libx265</filename>.
399 </para>
400
401 <para>
402 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
403 </para>
404
405 <para>
406 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
407 Enables HTTPS protocol for network streams.
408 </para>
409
410 <para>
411 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
412 builds the <command>qt-faststart</command> program which can modify
413 QuickTime formatted movies (<filename class="extension">.mov</filename>
414 or <filename class="extension">.mp4</filename>) so that the header
415 information is located at the beginning of the file instead of the end.
416 This allows the movie file to begin playing before the entire file has
417 been downloaded.
418 </para>
419
420 <note>
421 <para>
422 Support for most of the dependency packages requires using options
423 passed to the <command>configure</command> script. View the output
424 from <command>./configure --help</command> for complete information
425 about enabling dependency packages.
426 </para>
427 </note>
428
429 </sect2>
430
431 <sect2 role="configuration">
432 <title>Configuring FFmpeg</title>
433
434 <sect3 id="ffmpeg-config">
435 <title>Config Files</title>
436
437 <para>
438 <filename>/etc/ffserver.conf</filename> and
439 <filename>~/.ffmpeg/ffserver-config</filename>
440 </para>
441
442 <indexterm zone="ffmpeg ffmpeg-config">
443 <primary
444 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
445 </indexterm>
446
447 <indexterm zone="ffmpeg ffmpeg-config">
448 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
449 </indexterm>
450
451 <para>
452 You'll find a sample <command>ffserver</command> configuration file at
453 <filename>doc/ffserver.conf</filename> in the source tree.
454 </para>
455
456 </sect3>
457
458 </sect2>
459
460 <sect2 role="content">
461 <title>Contents</title>
462
463 <segmentedlist>
464 <segtitle>Installed Programs</segtitle>
465 <segtitle>Installed Libraries</segtitle>
466 <segtitle>Installed Directories</segtitle>
467
468 <seglistitem>
469 <seg>
470 ffmpeg, ffplay, ffprobe, ffserver, and
471 qt-faststart
472 </seg>
473 <seg>
474 libavcodec.so, libavdevice.so, libavfilter.so,
475 libavformat.so, libavutil.so, libpostproc.so,
476 libswresample, and libswscale.so
477 </seg>
478 <seg>
479 /usr/include/{libavcodec,libavdevice,libavfilter,libavformat},
480 /usr/include/{libavutil,libpostproc,libswresample,libswscale},
481 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
482 /usr/share/ffmpeg
483 </seg>
484 </seglistitem>
485 </segmentedlist>
486
487 <variablelist>
488 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
489 <?dbfo list-presentation="list"?>
490 <?dbhtml list-presentation="table"?>
491
492 <varlistentry id="ffmpeg-prog">
493 <term><command>ffmpeg</command></term>
494 <listitem>
495 <para>
496 is a command-line tool to convert video files, network streams and
497 input from a TV card to several video formats.
498 </para>
499 <indexterm zone="ffmpeg ffmpeg-prog">
500 <primary sortas="b-ffmpeg">ffmpeg</primary>
501 </indexterm>
502 </listitem>
503 </varlistentry>
504
505 <varlistentry id="ffplay">
506 <term><command>ffplay</command></term>
507 <listitem>
508 <para>
509 is a very simple and portable media player using the
510 <filename>ffmpeg</filename> libraries and the SDL library.
511 </para>
512 <indexterm zone="ffmpeg ffplay">
513 <primary sortas="b-ffplay">ffplay</primary>
514 </indexterm>
515 </listitem>
516 </varlistentry>
517
518 <varlistentry id="ffprobe">
519 <term><command>ffprobe</command></term>
520 <listitem>
521 <para>
522 gathers information from multimedia streams and prints it in a human
523 and machine-readable fashion.
524 </para>
525 <indexterm zone="ffmpeg ffprobe">
526 <primary sortas="b-ffprobe">ffprobe</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
531 <varlistentry id="ffserver">
532 <term><command>ffserver</command></term>
533 <listitem>
534 <para>
535 is a streaming server for everything that <command>ffmpeg</command>
536 could use as input (files, streams, TV card input, webcam, etc).
537 </para>
538 <indexterm zone="ffmpeg ffserver">
539 <primary sortas="b-ffserver">ffserver</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="qt-faststart">
545 <term><command>qt-faststart</command></term>
546 <listitem>
547 <para>
548 moves the index file to the front of quicktime (mov/mp4) videos.
549 </para>
550 <indexterm zone="ffmpeg qt-faststart">
551 <primary sortas="b-qt-faststart">qt-faststart</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="libavcodec">
557 <term><filename class="libraryfile">libavcodec.so</filename></term>
558 <listitem>
559 <para>
560 is a library containing the <application>FFmpeg</application> codecs
561 (both encoding and decoding).
562 </para>
563 <indexterm zone="ffmpeg libavcodec">
564 <primary sortas="c-libavcodec">libavcodec.so</primary>
565 </indexterm>
566 </listitem>
567 </varlistentry>
568
569 <varlistentry id="libavdevice">
570 <term><filename class="libraryfile">libavdevice.so</filename></term>
571 <listitem>
572 <para>
573 is the <application>FFmpeg</application> device handling library.
574 </para>
575 <indexterm zone="ffmpeg libavdevice">
576 <primary sortas="c-libavdevice">libavdevice.so</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="libavfilter">
582 <term><filename class="libraryfile">libavfilter.so</filename></term>
583 <listitem>
584 <para>
585 is a library of filters that can alter video or audio between the
586 decoder and the encoder (or output).
587 </para>
588 <indexterm zone="ffmpeg libavfilter">
589 <primary sortas="c-libavfilter">libavfilter.so</primary>
590 </indexterm>
591 </listitem>
592 </varlistentry>
593
594 <varlistentry id="libavformat">
595 <term><filename class="libraryfile">libavformat.so</filename></term>
596 <listitem>
597 <para>
598 is a library containing the file formats handling (mux and demux
599 code for several formats) used by <command>ffplay</command> as well
600 as allowing the generation of audio or video streams.
601 </para>
602 <indexterm zone="ffmpeg libavformat">
603 <primary sortas="c-libavformat">libavformat.so</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="libavutil">
609 <term><filename class="libraryfile">libavutil.so</filename></term>
610 <listitem>
611 <para>
612 is the <application>FFmpeg</application> utility library.
613 </para>
614 <indexterm zone="ffmpeg libavutil">
615 <primary sortas="c-libavutil">libavutil.so</primary>
616 </indexterm>
617 </listitem>
618 </varlistentry>
619
620 <varlistentry id="libpostproc">
621 <term><filename class="libraryfile">libpostproc.so</filename></term>
622 <listitem>
623 <para>
624 is the <application>FFmpeg</application> post processing library.
625 </para>
626 <indexterm zone="ffmpeg libpostproc">
627 <primary sortas="c-libpostproc">libpostproc.so</primary>
628 </indexterm>
629 </listitem>
630 </varlistentry>
631
632 <varlistentry id="libswresample">
633 <term><filename class="libraryfile">libswresample.so</filename></term>
634 <listitem>
635 <para>
636 is the <application>FFmpeg</application> audio rescaling library,
637 it contains functions for converting audio sample formats.
638 </para>
639 <indexterm zone="ffmpeg libswresample">
640 <primary sortas="c-libswresample">libswresample.so</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="libswscale">
646 <term><filename class="libraryfile">libswscale.so</filename></term>
647 <listitem>
648 <para>
649 is the <application>FFmpeg</application> image rescaling library.
650 </para>
651 <indexterm zone="ffmpeg libswscale">
652 <primary sortas="c-libswscale">libswscale.so</primary>
653 </indexterm>
654 </listitem>
655 </varlistentry>
656
657 </variablelist>
658
659 </sect2>
660
661</sect1>
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