source: multimedia/videoutils/ffmpeg.xml@ e200fb6

lazarus qt5new trunk upgradedb
Last change on this file since e200fb6 was e200fb6, checked in by Douglas R. Reno <renodr@…>, 3 months ago

Package update:

Update to ffmpeg-4.4.1 (Security Update). Also includes some tweaks to
the information regarding the FATE test suite.

  • Property mode set to 100644
File size: 24.8 KB
Line 
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 "7b9d5b652d20e8c5405304ad72636d4a">
10 <!ENTITY ffmpeg-size "9.1 MB">
11 <!ENTITY ffmpeg-buildsize "212 MB (add 1.9 GB for the FATE suite/tests, add 1.4 GB for documentation)">
12 <!ENTITY ffmpeg-time "1.4 SBU (using parallelism=4; add 1.1 SBU (with THREADS=4) to run the FATE suite after sample files are downloaded; add 0.8 SBU for doxygen docs)">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18 <sect1info>
19 <date>$Date$</date>
20 </sect1info>
21
22 <title>FFmpeg-&ffmpeg-version;</title>
23
24 <indexterm zone="ffmpeg">
25 <primary sortas="a-FFmpeg">FFmpeg</primary>
26 </indexterm>
27
28 <sect2 role="package">
29 <title>Introduction to FFmpeg</title>
30
31 <para>
32 <application>FFmpeg</application> is a solution to record, convert and
33 stream audio and video. It is a very fast video and audio converter and it
34 can also acquire from a live audio/video source. Designed to be intuitive,
35 the command-line interface (<command>ffmpeg</command>) tries to figure out
36 all the parameters, when possible. <application>FFmpeg</application> can
37 also convert from any sample rate to any other, and resize video on the
38 fly with a high quality polyphase filter.
39 <application>FFmpeg</application> can use a Video4Linux compatible video
40 source and any Open Sound System audio source.
41 </para>
42
43 &lfs110a_checked;
44
45 <bridgehead renderas="sect3">Package Information</bridgehead>
46 <itemizedlist spacing="compact">
47 <listitem>
48 <para>
49 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
50 </para>
51 </listitem>
52 <listitem>
53 <para>
54 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
55 </para>
56 </listitem>
57 <listitem>
58 <para>
59 Download MD5 sum: &ffmpeg-md5sum;
60 </para>
61 </listitem>
62 <listitem>
63 <para>
64 Download size: &ffmpeg-size;
65 </para>
66 </listitem>
67 <listitem>
68 <para>
69 Estimated disk space required: &ffmpeg-buildsize;
70 </para>
71 </listitem>
72 <listitem>
73 <para>
74 Estimated build time: &ffmpeg-time;
75 </para>
76 </listitem>
77 </itemizedlist>
78
79 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
80
81 <bridgehead renderas="sect4">Recommended</bridgehead>
82 <para role="recommended">
83 <xref linkend="libass"/>,
84 <xref linkend="fdk-aac"/>,
85 <xref linkend="freetype2"/>,
86 <xref linkend="lame"/>,
87 <xref linkend="libtheora"/>,
88 <xref linkend="libvorbis"/>,
89 <xref linkend="libvpx"/>,
90 <xref linkend="opus"/>,
91 <xref linkend="x264"/>,
92 <xref linkend="x265"/>, and
93 <xref linkend="nasm"/> or <xref linkend="yasm"/>
94 </para>
95
96 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
97 <para role="recommended">
98 <xref linkend="alsa-lib"/>,
99 <xref linkend="libva"/>,
100 <xref linkend="libvdpau"/> (with the corresponding driver package), and
101 <xref linkend="sdl2"/>
102 </para>
103
104 <bridgehead renderas="sect4">Optional</bridgehead>
105 <para role="optional">
106 <xref linkend="doxygen"/>,
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="https://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="https://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="https://openal.org/">OpenAL</ulink>,
142 <ulink url="https://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
143 <!--<ulink url="http://diracvideo.org/">Schroedinger</ulink>,-->
144 <ulink url="https://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
145 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
146 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
147 <ulink url="https://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, for testing in another system,
273 or for when a new version of ffmpeg is released. Then, unpack the sample
274 files in the source directory, and run the <command>make fate-rsync
275 ...</command> command above to sync with the upstream repository. The
276 download size and time are drastically reduced by doing this. Estimated
277 values in "Package Information" do not include the download SBU. Some
278 samples may have been removed in newer versions, so in order to be sure
279 local and server fate samples are identical when you use previously
280 saved samples, 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, execute FATE with the following commands (there are more than 3800
288 tests in the suite):
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 <para>
300 A successful run should return no errors or warnings, just a list of tests
301 and total amount at the end.
302 </para>
303
304 </sect2>
305
306 <sect2 role="commands">
307 <title>Command Explanations</title>
308
309 <para>
310 <command>sed -i ... configure</command>: This command adds the
311 <application>ALSA</application> library to the
312 <application>Flite</application> <envar>LDFLAGS</envar> variable and
313 enables the discovery of <application>Flite</application>.
314 </para>
315
316 <para>
317 <command>find ... ;</command>: Fixes permissions of documentation files
318 and directories.
319 </para>
320
321 <para>
322 <parameter>--enable-libfreetype</parameter>: Enables
323 <application>Freetype</application> support.
324 </para>
325
326 <para>
327 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
328 permits support for postprocessing, swscale and many other features.
329 </para>
330
331 <para>
332 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
333 version 3 code.
334 </para>
335
336 <para>
337 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
338 Note that the resulting libraries and binaries will be unredistributable.
339 </para>
340
341 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
342 href="../../xincludes/static-libraries.xml"/>
343
344 <para>
345 <parameter>--enable-shared</parameter>: Enables building shared
346 libraries, otherwise only static libraries are built and installed.
347 </para>
348
349 <para>
350 <parameter>--disable-debug</parameter>: Disables building debugging
351 symbols into the programs and libraries.
352 </para>
353
354 <para>
355 <parameter>--enable-avresample</parameter>: Enables
356 <xref linkend="transcode"/> to be compiled.
357 </para>
358
359 <para>
360 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
361 rendering via <filename class="libraryfile">libass</filename>.
362 </para>
363
364 <para>
365 <option>--enable-libdrm</option>: Use this switch if
366 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
367 input module which is useful for screen capturing or streaming.
368 </para>
369
370 <para>
371 <parameter>--enable-libfdk-aac</parameter>: Enables AAC audio encoding via
372 <filename class="libraryfile">libfdk-aac</filename>.
373 </para>
374
375 <para>
376 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
377 via <filename class="libraryfile">libmp3lame</filename>.
378 </para>
379
380 <para>
381 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
382 Theora video encoding via <filename
383 class="libraryfile">libvorbis</filename> and <filename
384 class="libraryfile">libtheora</filename>.
385 </para>
386
387 <para>
388 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
389 encoding via <filename class="libraryfile">libvorbis</filename> and
390 <filename class="libraryfile">libvpx</filename>.
391 </para>
392
393 <para>
394 <parameter>--enable-libx264</parameter>: Enables high-quality
395 H.264/MPEG-4 AVC encoding via <filename
396 class="libraryfile">libx264</filename>.
397 </para>
398
399 <para>
400 <parameter>--enable-libx265</parameter>: Enables high-quality
401 H.265/HEVC encoding via <filename
402 class="libraryfile">libx265</filename>.
403 </para>
404
405 <para>
406 <parameter>--enable-openssl</parameter>:
407 Enables HTTPS protocol for network streams.
408 </para>
409
410 <para>
411 <option>--enable-gnutls</option>: Use this option instead of
412 <parameter>--enable-openssl</parameter>, if you want to use
413 <application>GnuTLS</application> instead of
414 <application>OpenSSL</application> for HTTPS protocol.
415 </para>
416
417 <para>
418 <option>--disable-doc</option>: Disables building html documentation.
419 This is only needed if <xref linkend="doxygen"/> is installed and you
420 do not want to build the html documentation.
421 </para>
422
423 <para>
424 <option>--enable-libpulse</option>: Enables support for
425 <application>Pulseaudio</application> for audio output.
426 </para>
427
428 <para>
429 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
430 builds the <command>qt-faststart</command> program which can modify
431 QuickTime formatted movies (<filename class="extension">.mov</filename>
432 or <filename class="extension">.mp4</filename>) so that the header
433 information is located at the beginning of the file instead of the end.
434 This allows the movie file to begin playing before the entire file has
435 been downloaded.
436 </para>
437
438 <note>
439 <para>
440 Support for most of the dependency packages requires using options
441 passed to the <command>configure</command> script. View the output
442 from <command>./configure --help</command> for complete information
443 about enabling dependency packages.
444 </para>
445 </note>
446
447 </sect2>
448
449<!-- ffserver has been removed
450 <sect2 role="configuration">
451 <title>Configuring FFmpeg</title>
452
453 <sect3 id="ffmpeg-config">
454 <title>Config Files</title>
455
456 <para>
457 <filename>/etc/ffserver.conf</filename>
458 <filename>~/.ffmpeg/ffserver-config</filename>
459 </para>
460
461 <indexterm zone="ffmpeg ffmpeg-config">
462 <primary
463 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
464 </indexterm>
465
466 <indexterm zone="ffmpeg ffmpeg-config">
467 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
468 </indexterm>
469
470 <para>
471 You'll find a sample <command>ffserver</command> configuration file at
472 <filename>doc/ffserver.conf</filename> in the source tree.
473 </para>
474
475 </sect3>
476
477 </sect2>
478 -->
479
480 <sect2 role="content">
481 <title>Contents</title>
482
483 <segmentedlist>
484 <segtitle>Installed Programs</segtitle>
485 <segtitle>Installed Libraries</segtitle>
486 <segtitle>Installed Directories</segtitle>
487
488 <seglistitem>
489 <seg>
490 ffmpeg, ffplay, ffprobe, <!--ffserver,--> and qt-faststart
491 </seg>
492 <seg>
493 libavcodec.so, libavdevice.so, libavfilter.so,
494 libavformat.so, libavutil.so, libavresample.so, libpostproc.so,
495 libswresample.so, and libswscale.so
496 </seg>
497 <seg>
498 /usr/include/libav{codec,device,filter,format,resample,util},
499 /usr/include/libpostproc,
500 /usr/include/libsw{resample,scale},
501 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
502 /usr/share/ffmpeg
503 </seg>
504 </seglistitem>
505 </segmentedlist>
506
507 <variablelist>
508 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
509 <?dbfo list-presentation="list"?>
510 <?dbhtml list-presentation="table"?>
511
512 <varlistentry id="ffmpeg-prog">
513 <term><command>ffmpeg</command></term>
514 <listitem>
515 <para>
516 is a command-line tool to convert video files, network streams and
517 input from a TV card to several video formats
518 </para>
519 <indexterm zone="ffmpeg ffmpeg-prog">
520 <primary sortas="b-ffmpeg">ffmpeg</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="ffplay">
526 <term><command>ffplay</command></term>
527 <listitem>
528 <para>
529 is a very simple and portable media player using the
530 <filename>ffmpeg</filename> libraries and the SDL library
531 </para>
532 <indexterm zone="ffmpeg ffplay">
533 <primary sortas="b-ffplay">ffplay</primary>
534 </indexterm>
535 </listitem>
536 </varlistentry>
537
538 <varlistentry id="ffprobe">
539 <term><command>ffprobe</command></term>
540 <listitem>
541 <para>
542 gathers information from multimedia streams and prints it in a human
543 and machine-readable fashion
544 </para>
545 <indexterm zone="ffmpeg ffprobe">
546 <primary sortas="b-ffprobe">ffprobe</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551<!-- Not found in 4.3.2
552 <varlistentry id="ffserver">
553 <term><command>ffserver</command></term>
554 <listitem>
555 <para>
556 is a streaming server for everything that <command>ffmpeg</command>
557 could use as input (files, streams, TV card input, webcam, etc)
558 </para>
559 <indexterm zone="ffmpeg ffserver">
560 <primary sortas="b-ffserver">ffserver</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564-->
565 <varlistentry id="qt-faststart">
566 <term><command>qt-faststart</command></term>
567 <listitem>
568 <para>
569 moves the index file to the front of quicktime (mov/mp4) videos
570 </para>
571 <indexterm zone="ffmpeg qt-faststart">
572 <primary sortas="b-qt-faststart">qt-faststart</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="libavcodec">
578 <term><filename class="libraryfile">libavcodec.so</filename></term>
579 <listitem>
580 <para>
581 is a library containing the <application>FFmpeg</application> codecs
582 (both encoding and decoding)
583 </para>
584 <indexterm zone="ffmpeg libavcodec">
585 <primary sortas="c-libavcodec">libavcodec.so</primary>
586 </indexterm>
587 </listitem>
588 </varlistentry>
589
590 <varlistentry id="libavdevice">
591 <term><filename class="libraryfile">libavdevice.so</filename></term>
592 <listitem>
593 <para>
594 is the <application>FFmpeg</application> device handling library
595 </para>
596 <indexterm zone="ffmpeg libavdevice">
597 <primary sortas="c-libavdevice">libavdevice.so</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
602 <varlistentry id="libavfilter">
603 <term><filename class="libraryfile">libavfilter.so</filename></term>
604 <listitem>
605 <para>
606 is a library of filters that can alter video or audio between the
607 decoder and the encoder (or output)
608 </para>
609 <indexterm zone="ffmpeg libavfilter">
610 <primary sortas="c-libavfilter">libavfilter.so</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 <varlistentry id="libavformat">
616 <term><filename class="libraryfile">libavformat.so</filename></term>
617 <listitem>
618 <para>
619 is a library containing the file formats handling (mux and demux
620 code for several formats) used by <command>ffplay</command> as well
621 as allowing the generation of audio or video streams
622 </para>
623 <indexterm zone="ffmpeg libavformat">
624 <primary sortas="c-libavformat">libavformat.so</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="libavresample">
630 <term><filename class="libraryfile">libavresample.so</filename></term>
631 <listitem>
632 <para>
633 is a library containing functions for resampling audio and video.
634 </para>
635 <indexterm zone="ffmpeg libavresample">
636 <primary sortas="c-libavresample">libavresample</primary>
637 </indexterm>
638 </listitem>
639 </varlistentry>
640
641 <varlistentry id="libavutil">
642 <term><filename class="libraryfile">libavutil.so</filename></term>
643 <listitem>
644 <para>
645 is the <application>FFmpeg</application> utility library
646 </para>
647 <indexterm zone="ffmpeg libavutil">
648 <primary sortas="c-libavutil">libavutil.so</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <varlistentry id="libpostproc">
654 <term><filename class="libraryfile">libpostproc.so</filename></term>
655 <listitem>
656 <para>
657 is the <application>FFmpeg</application> post processing library
658 </para>
659 <indexterm zone="ffmpeg libpostproc">
660 <primary sortas="c-libpostproc">libpostproc.so</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="libswresample">
666 <term><filename class="libraryfile">libswresample.so</filename></term>
667 <listitem>
668 <para>
669 is the <application>FFmpeg</application> audio rescaling library,
670 it contains functions for converting audio sample formats
671 </para>
672 <indexterm zone="ffmpeg libswresample">
673 <primary sortas="c-libswresample">libswresample.so</primary>
674 </indexterm>
675 </listitem>
676 </varlistentry>
677
678 <varlistentry id="libswscale">
679 <term><filename class="libraryfile">libswscale.so</filename></term>
680 <listitem>
681 <para>
682 is the <application>FFmpeg</application> image rescaling library
683 </para>
684 <indexterm zone="ffmpeg libswscale">
685 <primary sortas="c-libswscale">libswscale.so</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
690 </variablelist>
691
692 </sect2>
693
694</sect1>
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