source: multimedia/videoutils/ffmpeg.xml@ 4c24eb0

10.1 11.0 ken/refactor-virt lazarus qt5new trunk xry111/git-date xry111/git-date-for-trunk xry111/git-date-test
Last change on this file since 4c24eb0 was 4c24eb0, checked in by Pierre Labastie <pieere@…>, 8 months ago

Remove period at the end of short descriptions.
In the process, some attributes in single quotes have been changed to double
quotes, and a few attribute lists have been written on one line instead of
several lines.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@24236 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 "5d1956bb552e91dc3b8287db346d0d58">
10 <!ENTITY ffmpeg-size "8.9 MB">
11 <!ENTITY ffmpeg-buildsize "170 MB (add 3.7 GB for the FATE suite/tests, add 1.3 GB for doxygen docs)">
12 <!ENTITY ffmpeg-time "1.3 SBU (using parallelism=4; add 3.8 SBU (with THREADS=4) to run the FATE suite after sample files are downloaded; add 1.1 SBU for doxygen docs)">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 </sect1info>
22
23 <title>FFmpeg-&ffmpeg-version;</title>
24
25 <indexterm zone="ffmpeg">
26 <primary sortas="a-FFmpeg">FFmpeg</primary>
27 </indexterm>
28
29 <sect2 role="package">
30 <title>Introduction to FFmpeg</title>
31
32 <para>
33 <application>FFmpeg</application> is a solution to record, convert and
34 stream audio and video. It is a very fast video and audio converter and it
35 can also acquire from a live audio/video source. Designed to be intuitive,
36 the command-line interface (<command>ffmpeg</command>) tries to figure out
37 all the parameters, when possible. <application>FFmpeg</application> can
38 also convert from any sample rate to any other, and resize video on the
39 fly with a high quality polyphase filter.
40 <application>FFmpeg</application> can use a Video4Linux compatible video
41 source and any Open Sound System audio source.
42 </para>
43
44 &lfs10_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="nasm"/> or <xref linkend="yasm"/>
95 </para>
96
97 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
98 <para role="recommended">
99 <xref linkend="alsa-lib"/>,
100 <xref linkend="libva"/>,
101 <xref linkend="libvdpau"/> (with the corresponding driver package), and
102 <xref linkend="sdl2"/>
103 </para>
104
105 <bridgehead renderas="sect4">Optional</bridgehead>
106 <para role="optional">
107 <xref linkend="fontconfig"/>,
108 <xref linkend="fribidi"/>,
109 <xref linkend="frei0r"/>,
110 <xref linkend="libcdio"/> (to identify and play CDs),
111 <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
112 <xref linkend="libwebp"/>,
113 <xref linkend="opencv"/>,
114 <xref linkend="openjpeg2"/>,
115 <xref linkend="gnutls"/>,
116 <xref linkend="pulseaudio"/>,
117 <xref linkend="samba"/>,
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="https://gitlab.xiph.org/xiph/celt">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-avresample \
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-openssl \
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 remap="doc"><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
214 and you wish to build (if --disable-doc was
215 used) or rebuild the html documentation, issue:
216 </para>
217
218<screen remap="doc"><userinput>doxygen doc/Doxyfile</userinput></screen>
219
220 <para>
221 The fate-suite tests include comparisons with installed files, and should
222 not be run before the package is installed. Therefore, if you desire to
223 run them, instructions are given further below.
224 </para>
225
226 <para>
227 Now, as the <systemitem class="username">root</systemitem> user:
228 </para>
229
230<screen role="root"><userinput>make install &amp;&amp;
231
232install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
233install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
234install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
235
236 <para>
237 If the PDF and Postscript documentation was built, issue the following
238 commands, as the <systemitem class="username">root</systemitem> user, to
239 install them:
240 </para>
241
242<screen role="root"
243 remap="doc"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
244install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
245
246 <para>
247 If you used <command>doxygen</command> to manually create the API
248 documentation, install it by issuing the following commands
249 as the <systemitem class="username">root</systemitem> user:
250 </para>
251
252<screen role="root"
253 remap="doc"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
254cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
255find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
256find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
257
258 <para>
259 To properly test the installation you must have <xref linkend="rsync"/>
260 installed and follow the instructions for the <ulink
261 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
262 Environment</ulink> (FATE). First, about 1 GB of sample files used to
263 run FATE are downloaded with the command:
264 </para>
265
266<screen remap="test"><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
267
268 <para>
269 The <filename class="directory">fate-suite</filename> directory is
270 created and the files are downloaded there. That command actually runs an
271 rsync command, to obtain the sample files. You may want to compress and
272 keep this directory for testing again, in another system, or when a new
273 version of ffmpeg is launched. Then, you unpack the sample files in the
274 source directory, and run, again, the <command>make fate-rsync
275 ...</command> command above, to sync with the repository. Now, the
276 download size and time are drastically reduced. Estimated values in
277 "Package Information" do not include the download SBU. Some samples may
278 have been removed, in the new version, so, in order to be sure local and
279 server fate samples are identical, when you use previously saved samples,
280 run the following command:
281 </para>
282
283<screen role="nodump"><userinput>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
284 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</userinput></screen>
285
286 <para>
287 Next, FATE is executed, with the commands (you obtain a number of tests
288 larger than 3700):
289 </para>
290
291<screen remap="test"><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
292grep ^TEST ../fate.log | wc -l</userinput></screen>
293
294 <para>
295 where <replaceable>N</replaceable> is an integer,
296 <replaceable>N</replaceable> &le; number of cores in the system.
297 </para>
298
299 </sect2>
300
301 <sect2 role="commands">
302 <title>Command Explanations</title>
303
304 <para>
305 <command>sed -i ... configure</command>: This command adds the
306 <application>ALSA</application> library to the
307 <application>Flite</application> <envar>LDFLAGS</envar> variable and
308 enables the discovery of <application>Flite</application>.
309 </para>
310
311 <para>
312 <command>find ... ;</command>: Fix permissions of documentation files
313 and directories.
314 </para>
315
316 <para>
317 <parameter>--enable-libfreetype</parameter>: Enables
318 <application>Freetype</application> support.
319 </para>
320
321 <para>
322 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
323 permits support for postprocessing, swscale and many other features.
324 </para>
325
326 <para>
327 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
328 version 3 code.
329 </para>
330
331 <para>
332 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
333 Note that the resulting libraries and binaries will be unredistributable.
334 </para>
335
336 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
337 href="../../xincludes/static-libraries.xml"/>
338
339 <para>
340 <parameter>--enable-shared</parameter>: Enables building shared
341 libraries, otherwise only static libraries are built and installed.
342 </para>
343
344 <para>
345 <parameter>--disable-debug</parameter>: Disables building debugging
346 symbols into the programs and libraries.
347 </para>
348
349 <para>
350 <parameter>--enable-avresample</parameter>: Enables
351 <xref linkend="transcode"/> to be compiled.
352 </para>
353
354 <para>
355 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
356 rendering via <filename class="libraryfile">libass</filename>.
357 </para>
358
359 <para>
360 <option>--enable-libdrm</option>: Use this switch if
361 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
362 input module which is useful for screen capturing or streaming.
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-openssl</parameter>:
403 Enables HTTPS protocol for network streams.
404 </para>
405
406 <para>
407 <option>--enable-gnutls</option>: Use this option instead of
408 <parameter>--enable-openssl</parameter>, if you want to use
409 <application>GnuTLS</application> instead of
410 <application>OpenSSL</application> for HTTPS protocol.
411 </para>
412
413 <para>
414 <option>--disable-doc</option>: Disables building html documentation.
415 This is only needed if <xref linkend="doxygen"/> is installed and you
416 do not want to build the html documentation.
417 </para>
418
419 <para>
420 <option>--enable-libpulse</option>: Enables support for
421 <application>Pulseaudio</application> for audio output.
422 </para>
423
424 <para>
425 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
426 builds the <command>qt-faststart</command> program which can modify
427 QuickTime formatted movies (<filename class="extension">.mov</filename>
428 or <filename class="extension">.mp4</filename>) so that the header
429 information is located at the beginning of the file instead of the end.
430 This allows the movie file to begin playing before the entire file has
431 been downloaded.
432 </para>
433
434 <note>
435 <para>
436 Support for most of the dependency packages requires using options
437 passed to the <command>configure</command> script. View the output
438 from <command>./configure --help</command> for complete information
439 about enabling dependency packages.
440 </para>
441 </note>
442
443 </sect2>
444
445 <sect2 role="configuration">
446 <title>Configuring FFmpeg</title>
447
448 <sect3 id="ffmpeg-config">
449 <title>Config Files</title>
450
451 <para>
452 <filename>/etc/ffserver.conf</filename> and
453 <filename>~/.ffmpeg/ffserver-config</filename>
454 </para>
455
456 <indexterm zone="ffmpeg ffmpeg-config">
457 <primary
458 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
459 </indexterm>
460
461 <indexterm zone="ffmpeg ffmpeg-config">
462 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
463 </indexterm>
464
465 <para>
466 You'll find a sample <command>ffserver</command> configuration file at
467 <filename>doc/ffserver.conf</filename> in the source tree.
468 </para>
469
470 </sect3>
471
472 </sect2>
473
474 <sect2 role="content">
475 <title>Contents</title>
476
477 <segmentedlist>
478 <segtitle>Installed Programs</segtitle>
479 <segtitle>Installed Libraries</segtitle>
480 <segtitle>Installed Directories</segtitle>
481
482 <seglistitem>
483 <seg>
484 ffmpeg, ffplay, ffprobe, ffserver, and qt-faststart
485 </seg>
486 <seg>
487 libavcodec.so, libavdevice.so, libavfilter.so,
488 libavformat.so, libavutil.so, libpostproc.so,
489 libswresample.so, and libswscale.so
490 </seg>
491 <seg>
492 /usr/include/libav{codec,device,filter,format,util},
493 /usr/include/libpostproc,
494 /usr/include/libsw{resample,scale},
495 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
496 /usr/share/ffmpeg
497 </seg>
498 </seglistitem>
499 </segmentedlist>
500
501 <variablelist>
502 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
503 <?dbfo list-presentation="list"?>
504 <?dbhtml list-presentation="table"?>
505
506 <varlistentry id="ffmpeg-prog">
507 <term><command>ffmpeg</command></term>
508 <listitem>
509 <para>
510 is a command-line tool to convert video files, network streams and
511 input from a TV card to several video formats
512 </para>
513 <indexterm zone="ffmpeg ffmpeg-prog">
514 <primary sortas="b-ffmpeg">ffmpeg</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="ffplay">
520 <term><command>ffplay</command></term>
521 <listitem>
522 <para>
523 is a very simple and portable media player using the
524 <filename>ffmpeg</filename> libraries and the SDL library
525 </para>
526 <indexterm zone="ffmpeg ffplay">
527 <primary sortas="b-ffplay">ffplay</primary>
528 </indexterm>
529 </listitem>
530 </varlistentry>
531
532 <varlistentry id="ffprobe">
533 <term><command>ffprobe</command></term>
534 <listitem>
535 <para>
536 gathers information from multimedia streams and prints it in a human
537 and machine-readable fashion
538 </para>
539 <indexterm zone="ffmpeg ffprobe">
540 <primary sortas="b-ffprobe">ffprobe</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="ffserver">
546 <term><command>ffserver</command></term>
547 <listitem>
548 <para>
549 is a streaming server for everything that <command>ffmpeg</command>
550 could use as input (files, streams, TV card input, webcam, etc)
551 </para>
552 <indexterm zone="ffmpeg ffserver">
553 <primary sortas="b-ffserver">ffserver</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="qt-faststart">
559 <term><command>qt-faststart</command></term>
560 <listitem>
561 <para>
562 moves the index file to the front of quicktime (mov/mp4) videos
563 </para>
564 <indexterm zone="ffmpeg qt-faststart">
565 <primary sortas="b-qt-faststart">qt-faststart</primary>
566 </indexterm>
567 </listitem>
568 </varlistentry>
569
570 <varlistentry id="libavcodec">
571 <term><filename class="libraryfile">libavcodec.so</filename></term>
572 <listitem>
573 <para>
574 is a library containing the <application>FFmpeg</application> codecs
575 (both encoding and decoding)
576 </para>
577 <indexterm zone="ffmpeg libavcodec">
578 <primary sortas="c-libavcodec">libavcodec.so</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="libavdevice">
584 <term><filename class="libraryfile">libavdevice.so</filename></term>
585 <listitem>
586 <para>
587 is the <application>FFmpeg</application> device handling library
588 </para>
589 <indexterm zone="ffmpeg libavdevice">
590 <primary sortas="c-libavdevice">libavdevice.so</primary>
591 </indexterm>
592 </listitem>
593 </varlistentry>
594
595 <varlistentry id="libavfilter">
596 <term><filename class="libraryfile">libavfilter.so</filename></term>
597 <listitem>
598 <para>
599 is a library of filters that can alter video or audio between the
600 decoder and the encoder (or output)
601 </para>
602 <indexterm zone="ffmpeg libavfilter">
603 <primary sortas="c-libavfilter">libavfilter.so</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="libavformat">
609 <term><filename class="libraryfile">libavformat.so</filename></term>
610 <listitem>
611 <para>
612 is a library containing the file formats handling (mux and demux
613 code for several formats) used by <command>ffplay</command> as well
614 as allowing the generation of audio or video streams
615 </para>
616 <indexterm zone="ffmpeg libavformat">
617 <primary sortas="c-libavformat">libavformat.so</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="libavutil">
623 <term><filename class="libraryfile">libavutil.so</filename></term>
624 <listitem>
625 <para>
626 is the <application>FFmpeg</application> utility library
627 </para>
628 <indexterm zone="ffmpeg libavutil">
629 <primary sortas="c-libavutil">libavutil.so</primary>
630 </indexterm>
631 </listitem>
632 </varlistentry>
633
634 <varlistentry id="libpostproc">
635 <term><filename class="libraryfile">libpostproc.so</filename></term>
636 <listitem>
637 <para>
638 is the <application>FFmpeg</application> post processing library
639 </para>
640 <indexterm zone="ffmpeg libpostproc">
641 <primary sortas="c-libpostproc">libpostproc.so</primary>
642 </indexterm>
643 </listitem>
644 </varlistentry>
645
646 <varlistentry id="libswresample">
647 <term><filename class="libraryfile">libswresample.so</filename></term>
648 <listitem>
649 <para>
650 is the <application>FFmpeg</application> audio rescaling library,
651 it contains functions for converting audio sample formats
652 </para>
653 <indexterm zone="ffmpeg libswresample">
654 <primary sortas="c-libswresample">libswresample.so</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
658
659 <varlistentry id="libswscale">
660 <term><filename class="libraryfile">libswscale.so</filename></term>
661 <listitem>
662 <para>
663 is the <application>FFmpeg</application> image rescaling library
664 </para>
665 <indexterm zone="ffmpeg libswscale">
666 <primary sortas="c-libswscale">libswscale.so</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
671 </variablelist>
672
673 </sect2>
674
675</sect1>
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