source: multimedia/videoutils/ffmpeg.xml@ dd0a69f

12.0 12.1 ken/TL2024 ken/tuningfonts lazarus plabs/newcss python3.11 rahul/power-profiles-daemon renodr/vulkan-addition trunk xry111/llvm18
Last change on this file since dd0a69f was 14891a90, checked in by Xi Ruoyao <xry111@…>, 12 months ago

treewide: More "User Notes" clean up

Remove links to pages w/o real contents.

  • Property mode set to 100644
File size: 25.7 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 "https://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.xz">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "47b6c5d930937413c3e308e2fdb3dfb5">
10 <!ENTITY ffmpeg-size "9.8 MB">
11 <!ENTITY ffmpeg-buildsize "187 MB (add 1.5 GB for the FATE suite/tests, add 786 MB for documentation)">
12 <!ENTITY ffmpeg-time "1.3 SBU (using parallelism=4; add 3.2 SBU (with THREADS=4) to run the FATE suite after sample files are downloaded; add 0.3 SBU for doxygen docs)">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18
19 <title>FFmpeg-&ffmpeg-version;</title>
20
21 <indexterm zone="ffmpeg">
22 <primary sortas="a-FFmpeg">FFmpeg</primary>
23 </indexterm>
24
25 <sect2 role="package">
26 <title>Introduction to FFmpeg</title>
27
28 <para>
29 <application>FFmpeg</application> is a solution to record, convert and
30 stream audio and video. It is a very fast video and audio converter and it
31 can also acquire from a live audio/video source. Designed to be intuitive,
32 the command-line interface (<command>ffmpeg</command>) tries to figure out
33 all the parameters, when possible. <application>FFmpeg</application> can
34 also convert from any sample rate to any other, and resize video on the
35 fly with a high quality polyphase filter.
36 <application>FFmpeg</application> can use a Video4Linux compatible video
37 source and any Open Sound System audio source.
38 </para>
39
40 &lfs113_checked;
41
42 <bridgehead renderas="sect3">Package Information</bridgehead>
43 <itemizedlist spacing="compact">
44 <listitem>
45 <para>
46 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
47 </para>
48 </listitem>
49 <listitem>
50 <para>
51 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
52 </para>
53 </listitem>
54 <listitem>
55 <para>
56 Download MD5 sum: &ffmpeg-md5sum;
57 </para>
58 </listitem>
59 <listitem>
60 <para>
61 Download size: &ffmpeg-size;
62 </para>
63 </listitem>
64 <listitem>
65 <para>
66 Estimated disk space required: &ffmpeg-buildsize;
67 </para>
68 </listitem>
69 <listitem>
70 <para>
71 Estimated build time: &ffmpeg-time;
72 </para>
73 </listitem>
74 </itemizedlist>
75
76 <bridgehead renderas="sect3">Additional Downloads</bridgehead>
77 <itemizedlist spacing="compact">
78 <listitem>
79 <para>
80 Required patch:
81 <ulink url="&patch-root;/ffmpeg-&ffmpeg-version;-chromium_method-1.patch"/>
82 </para>
83 </listitem>
84 </itemizedlist>
85
86 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
87
88 <bridgehead renderas="sect4">Recommended</bridgehead>
89 <para role="recommended">
90 <xref linkend="libaom"/>,
91 <xref linkend="libass"/>,
92 <xref linkend="fdk-aac"/>,
93 <xref linkend="freetype2"/>,
94 <xref linkend="lame"/>,
95 <xref linkend="libtheora"/>,
96 <xref linkend="libvorbis"/>,
97 <xref linkend="libvpx"/>,
98 <xref linkend="opus"/>,
99 <xref linkend="x264"/>,
100 <xref linkend="x265"/>, and
101 <xref linkend="nasm"/> or <xref linkend="yasm"/>
102 </para>
103
104 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
105 <para role="recommended">
106 <xref linkend="alsa-lib"/>,
107 <xref linkend="libva"/>,
108 <xref linkend="libvdpau"/> (with the corresponding driver package), and
109 <xref linkend="sdl2"/>
110 </para>
111
112 <bridgehead renderas="sect4">Optional</bridgehead>
113 <para role="optional">
114 <xref linkend="doxygen"/>,
115 <xref linkend="fontconfig"/>,
116 <xref linkend="fribidi"/>,
117 <xref linkend="frei0r"/>,
118 <xref linkend="libcdio"/> (to identify and play CDs),
119 <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
120 <xref linkend="libwebp"/>,
121 <xref linkend="opencv"/>,
122 <xref linkend="openjpeg2"/>,
123 <xref linkend="gnutls"/>,
124 <xref linkend="pulseaudio"/>,
125 <xref linkend="samba"/>,
126 <xref linkend="speex"/>,
127 <xref linkend="texlive"/>
128 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
129 <xref linkend="v4l-utils"/>,
130 <xref linkend="xvid"/>,
131 <xref linkend="x-window-system"/>,
132 <ulink url="https://github.com/festvox/flite">Flite</ulink>,
133 <ulink url="https://www.quut.com/gsm/">GSM</ulink>,
134 <!--<ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,-->
135 <!--<ulink url="http://www.ladspa.org/">LADSPA</ulink>,-->
136 <ulink url="https://tipok.org.ua/node/17">libaacplus</ulink>,
137 <ulink url="https://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
138 <ulink url="https://github.com/cacalabs/libcaca">libcaca</ulink>,
139 <ulink url="https://gitlab.xiph.org/xiph/celt">libcelt</ulink>,
140 <ulink url="https://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
141 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
142 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
143 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
144 <ulink url="https://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
145 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
146 <ulink url="https://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
147 <ulink url="https://www.libssh.org/">libssh</ulink>,
148 <!--<ulink url="https://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),-->
149 <ulink url="https://openal.org/">OpenAL</ulink>,
150 <ulink url="https://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
151 <ulink url="https://github.com/Haivision/srt">Srt</ulink>,
152 <ulink url="https://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
153 <ulink url="https://www.twolame.org/">TwoLAME</ulink>,
154 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
155 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
156 <!--<ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and-->
157 <ulink url="https://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
158 </para>
159
160 </sect2>
161
162 <sect2 role="installation">
163 <title>Installation of FFmpeg</title>
164
165 <note>
166 <para>
167 Some harmless warnings may be output by the build process regarding
168 the HTML documentation. This is due to an incompatibility with
169 Texinfo-7.0 and higher.
170 </para>
171 </note>
172
173 <para>
174 First, apply a patch that adds an API necessary for some packages to
175 build:
176 <!-- qtwebengine -->
177 </para>
178
179<screen><userinput remap="pre">patch -Np1 -i ../ffmpeg-&ffmpeg-version;-chromium_method-1.patch</userinput></screen>
180
181 <para>
182 Install <application>FFmpeg</application> by running the following
183 commands:
184 </para>
185
186<!--<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;-->
187<screen><userinput>./configure --prefix=/usr \
188 --enable-gpl \
189 --enable-version3 \
190 --enable-nonfree \
191 --disable-static \
192 --enable-shared \
193 --disable-debug \
194 --enable-libaom \
195 --enable-libass \
196 --enable-libfdk-aac \
197 --enable-libfreetype \
198 --enable-libmp3lame \
199 --enable-libopus \
200 --enable-libtheora \
201 --enable-libvorbis \
202 --enable-libvpx \
203 --enable-libx264 \
204 --enable-libx265 \
205 --enable-openssl \
206 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
207
208make &amp;&amp;
209
210gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
211
212 <para>
213 HTML documentation was built in the previous step. If you have
214 <xref linkend="texlive"/> installed and wish to build PDF and
215 Postscript versions of the documentation, issue the following commands:
216 </para>
217
218<!-- sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
219sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp; -->
220<screen remap="doc"><userinput>pushd doc &amp;&amp;
221for DOCNAME in `basename -s .html *.html`
222do
223 texi2pdf -b $DOCNAME.texi &amp;&amp;
224 texi2dvi -b $DOCNAME.texi &amp;&amp;
225
226 dvips -o $DOCNAME.ps \
227 $DOCNAME.dvi
228done &amp;&amp;
229popd &amp;&amp;
230unset DOCNAME</userinput></screen>
231
232 <para>
233 If you have <xref linkend="doxygen"/> installed
234 and you wish to build (if --disable-doc was
235 used) or rebuild the html documentation, issue:
236 </para>
237
238<screen remap="doc"><userinput>doxygen doc/Doxyfile</userinput></screen>
239
240 <para>
241 The fate-suite tests include comparisons with installed files, and should
242 not be run before the package is installed. Therefore, if you desire to
243 run them, instructions are given further below.
244 </para>
245
246 <para>
247 Now, as the <systemitem class="username">root</systemitem> user:
248 </para>
249
250<screen role="root"><userinput>make install &amp;&amp;
251
252install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
253install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
254install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
255
256 <para>
257 If the PDF and Postscript documentation was built, issue the following
258 commands, as the <systemitem class="username">root</systemitem> user, to
259 install them:
260 </para>
261
262<screen role="root"
263 remap="doc"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
264install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
265
266 <para>
267 If you used <command>doxygen</command> to manually create the API
268 documentation, install it by issuing the following commands
269 as the <systemitem class="username">root</systemitem> user:
270 </para>
271
272<screen role="root"
273 remap="doc"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
274cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
275find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
276find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
277
278 <para>
279 To properly test the installation you must have <xref linkend="rsync"/>
280 installed and follow the instructions for the <ulink
281 url="https://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
282 Environment</ulink> (FATE). First, about 1 GB of sample files used to
283 run FATE are downloaded with the command:
284 </para>
285
286<screen remap="test"><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
287
288 <para>
289 The <filename class="directory">fate-suite</filename> directory is
290 created and the files are downloaded there. That command actually runs an
291 rsync command to obtain the sample files. You may want to compress and
292 keep this directory for testing again, for testing in another system,
293 or for when a new version of ffmpeg is released. Then, unpack the sample
294 files in the source directory, and run the <command>make fate-rsync
295 ...</command> command above to sync with the upstream repository. The
296 download size and time are drastically reduced by doing this. Estimated
297 values in "Package Information" do not include the download SBU. Some
298 samples may have been removed in newer versions, so in order to be sure
299 local and server fate samples are identical when you use previously
300 saved samples, run the following command:
301 </para>
302
303<screen role="nodump"><userinput>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
304 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</userinput></screen>
305
306 <para>
307 Next, execute FATE with the following commands (there are more than 3800
308 tests in the suite):
309 </para>
310
311<screen remap="test"><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
312grep ^TEST ../fate.log | wc -l</userinput></screen>
313
314 <para>
315 where <replaceable>N</replaceable> is an integer,
316 <replaceable>N</replaceable> &le; number of cores in the system.
317 </para>
318
319 <para>
320 A successful run should return no errors or warnings, just a list of tests
321 and total amount at the end.
322 </para>
323
324 </sect2>
325
326 <sect2 role="commands">
327 <title>Command Explanations</title>
328
329 <para>
330 <command>sed -i ... configure</command>: This command adds the
331 <application>ALSA</application> library to the
332 <application>Flite</application> <envar>LDFLAGS</envar> variable and
333 enables the discovery of <application>Flite</application>.
334 </para>
335
336 <para>
337 <command>find ... ;</command>: Fixes permissions of documentation files
338 and directories.
339 </para>
340
341 <para>
342 <parameter>--enable-libfreetype</parameter>: Enables
343 <application>Freetype</application> support.
344 </para>
345
346 <para>
347 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
348 permits support for postprocessing, swscale and many other features.
349 </para>
350
351 <para>
352 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
353 version 3 code.
354 </para>
355
356 <para>
357 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
358 Note that the resulting libraries and binaries will be unredistributable.
359 </para>
360
361 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
362 href="../../xincludes/static-libraries.xml"/>
363
364 <para>
365 <parameter>--enable-shared</parameter>: Enables building shared
366 libraries, otherwise only static libraries are built and installed.
367 </para>
368
369 <para>
370 <parameter>--disable-debug</parameter>: Disables building debugging
371 symbols into the programs and libraries.
372 </para>
373
374 <!-- Library was removed in 5.0.1
375 <para>
376 <parameter>- -enable-avresample</parameter>: Enables
377 <xref linkend="transcode"/> to be compiled.
378 </para>
379 -->
380
381 <para>
382 <parameter>--enable-libaom</parameter>: Enables AV1 audio and video
383 decoding via <filename class="libraryfile">libaom</filename>.
384 </para>
385
386 <para>
387 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
388 rendering via <filename class="libraryfile">libass</filename>.
389 </para>
390
391 <para>
392 <option>--enable-libdrm</option>: Use this switch if
393 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
394 input module which is useful for screen capturing or streaming.
395 </para>
396
397 <para>
398 <parameter>--enable-libfdk-aac</parameter>: Enables AAC audio encoding via
399 <filename class="libraryfile">libfdk-aac</filename>.
400 </para>
401
402 <para>
403 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
404 via <filename class="libraryfile">libmp3lame</filename>.
405 </para>
406
407 <para>
408 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
409 Theora video encoding via <filename
410 class="libraryfile">libvorbis</filename> and <filename
411 class="libraryfile">libtheora</filename>.
412 </para>
413
414 <para>
415 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
416 encoding via <filename class="libraryfile">libvorbis</filename> and
417 <filename class="libraryfile">libvpx</filename>.
418 </para>
419
420 <para>
421 <parameter>--enable-libx264</parameter>: Enables high-quality
422 H.264/MPEG-4 AVC encoding via <filename
423 class="libraryfile">libx264</filename>.
424 </para>
425
426 <para>
427 <parameter>--enable-libx265</parameter>: Enables high-quality
428 H.265/HEVC encoding via <filename
429 class="libraryfile">libx265</filename>.
430 </para>
431
432 <para>
433 <parameter>--enable-openssl</parameter>:
434 Enables HTTPS protocol for network streams.
435 </para>
436
437 <para>
438 <option>--enable-gnutls</option>: Use this option instead of
439 <parameter>--enable-openssl</parameter>, if you want to use
440 <application>GnuTLS</application> instead of
441 <application>OpenSSL</application> for HTTPS protocol.
442 </para>
443
444 <para>
445 <option>--disable-doc</option>: Disables building html documentation.
446 This is only needed if <xref linkend="doxygen"/> is installed and you
447 do not want to build the html documentation.
448 </para>
449
450 <para>
451 <option>--enable-libpulse</option>: Enables support for
452 <application>Pulseaudio</application> for audio output.
453 </para>
454
455 <para>
456 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
457 builds the <command>qt-faststart</command> program which can modify
458 QuickTime formatted movies (<filename class="extension">.mov</filename>
459 or <filename class="extension">.mp4</filename>) so that the header
460 information is located at the beginning of the file instead of the end.
461 This allows the movie file to begin playing before the entire file has
462 been downloaded.
463 </para>
464
465 <note>
466 <para>
467 Support for most of the dependency packages requires using options
468 passed to the <command>configure</command> script. View the output
469 from <command>./configure --help</command> for complete information
470 about enabling dependency packages.
471 </para>
472 </note>
473
474 </sect2>
475
476<!-- ffserver has been removed
477 <sect2 role="configuration">
478 <title>Configuring FFmpeg</title>
479
480 <sect3 id="ffmpeg-config">
481 <title>Config Files</title>
482
483 <para>
484 <filename>/etc/ffserver.conf</filename>
485 <filename>~/.ffmpeg/ffserver-config</filename>
486 </para>
487
488 <indexterm zone="ffmpeg ffmpeg-config">
489 <primary
490 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
491 </indexterm>
492
493 <indexterm zone="ffmpeg ffmpeg-config">
494 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
495 </indexterm>
496
497 <para>
498 You'll find a sample <command>ffserver</command> configuration file at
499 <filename>doc/ffserver.conf</filename> in the source tree.
500 </para>
501
502 </sect3>
503
504 </sect2>
505 -->
506
507 <sect2 role="content">
508 <title>Contents</title>
509
510 <segmentedlist>
511 <segtitle>Installed Programs</segtitle>
512 <segtitle>Installed Libraries</segtitle>
513 <segtitle>Installed Directories</segtitle>
514
515 <seglistitem>
516 <seg>
517 ffmpeg, ffplay, ffprobe, <!--ffserver,--> and qt-faststart
518 </seg>
519 <seg>
520 libavcodec.so, libavdevice.so, libavfilter.so,
521 libavformat.so, libavutil.so, libpostproc.so,
522 libswresample.so, and libswscale.so
523 </seg>
524 <seg>
525 /usr/include/libav{codec,device,filter,format,util},
526 /usr/include/libpostproc,
527 /usr/include/libsw{resample,scale},
528 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
529 /usr/share/ffmpeg
530 </seg>
531 </seglistitem>
532 </segmentedlist>
533
534 <variablelist>
535 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
536 <?dbfo list-presentation="list"?>
537 <?dbhtml list-presentation="table"?>
538
539 <varlistentry id="ffmpeg-prog">
540 <term><command>ffmpeg</command></term>
541 <listitem>
542 <para>
543 is a command-line tool to convert video files, network streams and
544 input from a TV card to several video formats
545 </para>
546 <indexterm zone="ffmpeg ffmpeg-prog">
547 <primary sortas="b-ffmpeg">ffmpeg</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="ffplay">
553 <term><command>ffplay</command></term>
554 <listitem>
555 <para>
556 is a very simple and portable media player using the
557 <filename>ffmpeg</filename> libraries and the SDL library
558 </para>
559 <indexterm zone="ffmpeg ffplay">
560 <primary sortas="b-ffplay">ffplay</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="ffprobe">
566 <term><command>ffprobe</command></term>
567 <listitem>
568 <para>
569 gathers information from multimedia streams and prints it in a human
570 and machine-readable fashion
571 </para>
572 <indexterm zone="ffmpeg ffprobe">
573 <primary sortas="b-ffprobe">ffprobe</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578<!-- Not found in 4.3.2
579 <varlistentry id="ffserver">
580 <term><command>ffserver</command></term>
581 <listitem>
582 <para>
583 is a streaming server for everything that <command>ffmpeg</command>
584 could use as input (files, streams, TV card input, webcam, etc)
585 </para>
586 <indexterm zone="ffmpeg ffserver">
587 <primary sortas="b-ffserver">ffserver</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591-->
592 <varlistentry id="qt-faststart">
593 <term><command>qt-faststart</command></term>
594 <listitem>
595 <para>
596 moves the index file to the front of quicktime (mov/mp4) videos
597 </para>
598 <indexterm zone="ffmpeg qt-faststart">
599 <primary sortas="b-qt-faststart">qt-faststart</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="libavcodec">
605 <term><filename class="libraryfile">libavcodec.so</filename></term>
606 <listitem>
607 <para>
608 is a library containing the <application>FFmpeg</application> codecs
609 (both encoding and decoding)
610 </para>
611 <indexterm zone="ffmpeg libavcodec">
612 <primary sortas="c-libavcodec">libavcodec.so</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="libavdevice">
618 <term><filename class="libraryfile">libavdevice.so</filename></term>
619 <listitem>
620 <para>
621 is the <application>FFmpeg</application> device handling library
622 </para>
623 <indexterm zone="ffmpeg libavdevice">
624 <primary sortas="c-libavdevice">libavdevice.so</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="libavfilter">
630 <term><filename class="libraryfile">libavfilter.so</filename></term>
631 <listitem>
632 <para>
633 is a library of filters that can alter video or audio between the
634 decoder and the encoder (or output)
635 </para>
636 <indexterm zone="ffmpeg libavfilter">
637 <primary sortas="c-libavfilter">libavfilter.so</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 <varlistentry id="libavformat">
643 <term><filename class="libraryfile">libavformat.so</filename></term>
644 <listitem>
645 <para>
646 is a library containing the file formats handling (mux and demux
647 code for several formats) used by <command>ffplay</command> as well
648 as allowing the generation of audio or video streams
649 </para>
650 <indexterm zone="ffmpeg libavformat">
651 <primary sortas="c-libavformat">libavformat.so</primary>
652 </indexterm>
653 </listitem>
654 </varlistentry>
655
656 <varlistentry id="libavresample">
657 <term><filename class="libraryfile">libavresample.so</filename></term>
658 <listitem>
659 <para>
660 is a library containing functions for resampling audio and video.
661 </para>
662 <indexterm zone="ffmpeg libavresample">
663 <primary sortas="c-libavresample">libavresample</primary>
664 </indexterm>
665 </listitem>
666 </varlistentry>
667
668 <varlistentry id="libavutil">
669 <term><filename class="libraryfile">libavutil.so</filename></term>
670 <listitem>
671 <para>
672 is the <application>FFmpeg</application> utility library
673 </para>
674 <indexterm zone="ffmpeg libavutil">
675 <primary sortas="c-libavutil">libavutil.so</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="libpostproc">
681 <term><filename class="libraryfile">libpostproc.so</filename></term>
682 <listitem>
683 <para>
684 is the <application>FFmpeg</application> post processing library
685 </para>
686 <indexterm zone="ffmpeg libpostproc">
687 <primary sortas="c-libpostproc">libpostproc.so</primary>
688 </indexterm>
689 </listitem>
690 </varlistentry>
691
692 <varlistentry id="libswresample">
693 <term><filename class="libraryfile">libswresample.so</filename></term>
694 <listitem>
695 <para>
696 is the <application>FFmpeg</application> audio rescaling library,
697 it contains functions for converting audio sample formats
698 </para>
699 <indexterm zone="ffmpeg libswresample">
700 <primary sortas="c-libswresample">libswresample.so</primary>
701 </indexterm>
702 </listitem>
703 </varlistentry>
704
705 <varlistentry id="libswscale">
706 <term><filename class="libraryfile">libswscale.so</filename></term>
707 <listitem>
708 <para>
709 is the <application>FFmpeg</application> image rescaling library
710 </para>
711 <indexterm zone="ffmpeg libswscale">
712 <primary sortas="c-libswscale">libswscale.so</primary>
713 </indexterm>
714 </listitem>
715 </varlistentry>
716
717 </variablelist>
718
719 </sect2>
720
721</sect1>
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