source: multimedia/videoutils/ffmpeg.xml@ 0945dd2d

12.0 12.1 kea ken/TL2024 ken/tuningfonts lazarus lxqt plabs/newcss python3.11 qt5new rahul/power-profiles-daemon renodr/vulkan-addition trunk xry111/llvm18 xry111/xf86-video-removal
Last change on this file since 0945dd2d was 912b324, checked in by Douglas R. Reno <renodr@…>, 15 months ago

Typos from rhubarbpieguy

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