source: multimedia/videoutils/ffmpeg.xml@ 0dd2bc6

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.8 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind kea ken/TL2024 ken/inkscape-core-mods ken/tuningfonts lazarus lxqt nosym perl-modules plabs/newcss plabs/python-mods python3.11 qt5new rahul/power-profiles-daemon renodr/vulkan-addition trunk upgradedb xry111/intltool xry111/llvm18 xry111/soup3 xry111/test-20220226 xry111/xf86-video-removal
Last change on this file since 0dd2bc6 was 287a07e, checked in by Fernando de Oliveira <fernando@…>, 9 years ago

Update to ffmpeg-2.7.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@16108 af4574ff-66df-0310-9fd7-8a98e5e911e0

  • Property mode set to 100644
File size: 23.0 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY ffmpeg-download-http "http://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.bz2">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "5a16425b0bde1b952f58cff71b569a45">
10 <!ENTITY ffmpeg-size "7.8 MB">
11 <!ENTITY ffmpeg-buildsize "1.1 GB (with optional docs); additional 2.3 GB to run the FATE suite)">
12 <!ENTITY ffmpeg-time "4.2 SBU (with optional docs); additional 3.8 SBU to run the FATE suite, after sample files are downloaded">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 </sect1info>
22
23 <title>FFmpeg-&ffmpeg-version;</title>
24
25 <indexterm zone="ffmpeg">
26 <primary sortas="a-FFmpeg">FFmpeg</primary>
27 </indexterm>
28
29 <sect2 role="package">
30 <title>Introduction to FFmpeg</title>
31
32 <para>
33 <application>FFmpeg</application> is a solution to record, convert and
34 stream audio and video. It is a very fast video and audio converter and it
35 can also acquire from a live audio/video source. Designed to be intuitive,
36 the command-line interface (<command>ffmpeg</command>) tries to figure out
37 all the parameters, when possible. <application>FFmpeg</application> can
38 also convert from any sample rate to any other, and resize video on the
39 fly with a high quality polyphase filter.
40 <application>FFmpeg</application> can use a Video4Linux compatible video
41 source and any Open Sound System audio source.
42 </para>
43
44 &lfs77_checked; &gcc5_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"/>, and
93 <xref linkend="yasm"/>
94 </para>
95
96 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
97 <para>
98 <xref linkend="alsa-lib"/>,
99 <xref linkend="libva"/>,
100 <xref linkend="libvdpau"/> (with the corresponding driver package), and
101 <xref linkend="sdl"/>
102 </para>
103
104 <bridgehead renderas="sect4">Optional</bridgehead>
105 <para role="optional">
106 <xref linkend="faac"/>,
107 <xref linkend="fontconfig"/>,
108 <xref linkend="libcdio"/> (to identify and play CDs),
109 <xref linkend="libwebp"/>,
110 <xref linkend="openjpeg"/>,
111 <xref linkend="openssl"/> or
112 <xref linkend="gnutls"/>,
113 <xref linkend="pulseaudio"/>,
114 <xref linkend="speex"/>,
115 <xref linkend="texlive"/> (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
116 <xref linkend="v4l-utils"/>,
117 <xref linkend="xvid"/>,
118 <xref linkend="x-window-system"/>,
119 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
120 <ulink url="https://files.dyne.org/frei0r/snapshots/">frei0r</ulink>,
121 <ulink url="http://www.quut.com/gsm/">GSM</ulink>,
122 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
123 <ulink url="http://www.ladspa.org/">LADSPA</ulink>,
124 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
125 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
126 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
127 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
128 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
129 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
130 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
131 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
132 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
133 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
134 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
135 <ulink url="http://www.libssh.org/">libssh</ulink>,
136 <ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),
137 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>,
138 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
139 <ulink url="http://opencv.org/">OpenCV</ulink>,
140 <ulink url="http://diracvideo.org/">Schroedinger</ulink>,
141 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
142 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
143 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
144 <ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>, and
145 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
146 </para>
147
148 <para condition="html" role="usernotes">
149 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
150 </para>
151 </sect2>
152
153 <sect2 role="installation">
154 <title>Installation of FFmpeg</title>
155
156<!--<para>
157 If <application>Xorg</application> is installed in a prefix other
158 than <filename class='directory'>/usr</filename>, the build will fail. Fix
159 this by issuing the following command:
160 </para>
161
162<screen><userinput>export LIBRARY_PATH=$XORG_PREFIX/lib</userinput></screen>
163-->
164 <para>
165 Install <application>FFmpeg</application> by running the following
166 commands:
167 </para>
168
169<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
170
171./configure --prefix=/usr \
172 --enable-gpl \
173 --enable-version3 \
174 --enable-nonfree \
175 --disable-static \
176 --enable-shared \
177 --disable-debug \
178 --enable-libass \
179 --enable-libfdk-aac \
180 --enable-libfreetype \
181 --enable-libmp3lame \
182 --enable-libopus \
183 --enable-libtheora \
184 --enable-libvorbis \
185 --enable-libvpx \
186 --enable-libx264 \
187 --enable-x11grab \
188 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
189
190make &amp;&amp;
191
192gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
193<!--
194unset LIBRARY_PATH</userinput></screen>-->
195
196 <para>
197 HTML documentation was built in the previous step. If you have
198 <xref linkend="texlive"/> installed and wish to build PDF and
199 Postscript versions of the documentation, issue the following commands:
200 </para>
201
202<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
203sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
204
205pushd doc &amp;&amp;
206for DOCNAME in `basename -s .html *.html`
207do
208 texi2pdf -b $DOCNAME.texi &amp;&amp;
209 texi2dvi -b $DOCNAME.texi &amp;&amp;
210
211 dvips -o $DOCNAME.ps \
212 $DOCNAME.dvi
213done &amp;&amp;
214popd &amp;&amp;
215unset DOCNAME</userinput></screen>
216
217 <para>
218 If you have <xref linkend="doxygen"/> installed and wish to create the API
219 documentation (takes about 350 MB of space), issue the command
220 <command>doxygen doc/Doxyfile</command>.
221 </para>
222
223 <para>
224 The fate-suite tests include comparisons with installed files, and should
225 not be run before the package is installed. Therefore, if you desire to
226 run them, instructions are given further below.
227 </para>
228
229 <para>
230 Now, as the <systemitem class="username">root</systemitem> user:
231 </para>
232
233<screen role="root"><userinput>make install &amp;&amp;
234
235install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
236install -v -m644 doc/*.txt \
237 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
238
239 <para>
240 If PDF and Postscript documentations were built, issue the following
241 commands, as the <systemitem class="username">root</systemitem> user, to
242 install them:
243 </para>
244
245<screen role="root"><userinput>install -v -m644 doc/*.pdf \
246 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
247install -v -m644 doc/*.ps \
248 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
249
250 <para>
251 If you used <command>doxygen</command> to create the API documentation,
252 install it (another 300 MB of space) by issuing the following commands
253 as the <systemitem class="username">root</systemitem> user:
254 </para>
255
256<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
257cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
258find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
259find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
260
261 <para>
262 To properly test the installation you must have <xref linkend="rsync"/>
263 installed and follow the instructions for the <ulink
264 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
265 Environment</ulink> (FATE). First, about 927 MB of sample files used to
266 run FATE are downloaded with the command:
267 </para>
268
269<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
270
271 <para>
272 The <filename class="directory">fate-suite</filename> directory is
273 created and the files are downloaded there. That command actually runs an
274 rsync command, to obtain the sample files. You may want to compress and
275 keep this directory for testing again, in another system, or when a new
276 version of ffmpeg is launched. Then, you unpack the sample files in the
277 source directory, and run, again, the <command>make fate-rsync
278 ...</command> command above, to sync with the repository. Now, the
279 download size and time are drastically reduced. Estimated values in
280 "Package Information" do not include the download SBU. Some samples may
281 have been removed, in the new version, so, in order to be sure local and
282 server fate samples are identical, when you use previously saved samples,
283 run the following command:
284 </para>
285
286<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
287 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
288
289 <para>
290 Next, FATE is executed, with the commands (you obtain a number of tests
291 larger than 2400):
292 </para>
293
294<screen><userinput>make fate SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
295grep ^TEST ../fate.log | wc -l</userinput></screen>
296
297 </sect2>
298
299 <sect2 role="commands">
300 <title>Command Explanations</title>
301
302 <para>
303 <command>sed -i ... configure</command>: This command adds the
304 <application>ALSA</application> library to the
305 <application>Flite</application> <envar>LDFLAGS</envar> variable and
306 enables the discovery of <application>Flite</application>.
307 </para>
308
309 <para>
310 <command>sed -i ... texi</command>: Fix some .texi files for
311 documentation builds.
312 </para>
313
314 <para>
315 <command>find ... ;</command>: Fix permissions of documentation files
316 and directories.
317 </para>
318
319 <para>
320 <option>--enable-libfreetype</option>: Enables
321 <application>Freetype</application> support.
322 </para>
323
324 <para>
325 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
326 permits support for postprocessing, swscale and many other features.
327 </para>
328
329 <para>
330 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
331 version 3 code.
332 </para>
333
334 <para>
335 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
336 Note that the resulting libraries and binaries will be unredistributable.
337 </para>
338
339 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
340 href="../../xincludes/static-libraries.xml"/>
341
342 <para>
343 <parameter>--enable-shared</parameter>: Enables building shared
344 libraries, otherwise only static libraries are built and installed.
345 </para>
346
347 <para>
348 <parameter>--disable-debug</parameter>: Disables building debugging
349 symbols into the programs and libraries.
350 </para>
351
352 <para>
353 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
354 rendering via <filename class="libraryfile">libass</filename>.
355 </para>
356
357 <para>
358 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
359 highest-quality AAC audio encoding via <filename
360 class="libraryfile">libfdk-aac</filename>.
361 </para>
362
363 <para>
364 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
365 via <filename class="libraryfile">libmp3lame</filename>.
366 </para>
367
368 <para>
369 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
370 Theora video encoding via <filename
371 class="libraryfile">libvorbis</filename> and <filename
372 class="libraryfile">libtheora</filename>.
373 </para>
374
375 <para>
376 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
377 encoding via <filename class="libraryfile">libvorbis</filename> and
378 <filename class="libraryfile">libvpx</filename>.
379 </para>
380
381 <para>
382 <parameter>--enable-libx264</parameter>: Enables high-quality
383 H.264/MPEG-4 AVC encoding via <filename
384 class="libraryfile">libx264</filename>.
385 </para>
386
387 <para>
388 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
389 </para>
390
391 <para>
392 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
393 Enables HTTPS protocol for network streams.
394 </para>
395
396 <para>
397 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
398 builds the <command>qt-faststart</command> program which can modify
399 QuickTime formatted movies (<filename class="extension">.mov</filename>
400 or <filename class="extension">.mp4</filename>) so that the header
401 information is located at the beginning of the file instead of the end.
402 This allows the movie file to begin playing before the entire file has
403 been downloaded.
404 </para>
405
406 <note>
407 <para>
408 Support for most of the dependency packages requires using options
409 passed to the <command>configure</command> script. View the output
410 from <command>./configure --help</command> for complete information
411 about enabling dependency packages.
412 </para>
413 </note>
414
415 </sect2>
416
417 <sect2 role="configuration">
418 <title>Configuring FFmpeg</title>
419
420 <sect3 id="ffmpeg-config">
421 <title>Config Files</title>
422
423 <para>
424 <filename>/etc/ffserver.conf</filename> and
425 <filename>~/.ffmpeg/ffserver-config</filename>
426 </para>
427
428 <indexterm zone="ffmpeg ffmpeg-config">
429 <primary
430 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
431 </indexterm>
432
433 <indexterm zone="ffmpeg ffmpeg-config">
434 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
435 </indexterm>
436
437 <para>
438 You'll find a sample <command>ffserver</command> configuration file at
439 <filename>doc/ffserver.conf</filename> in the source tree.
440 </para>
441
442 </sect3>
443
444 </sect2>
445
446 <sect2 role="content">
447 <title>Contents</title>
448
449 <segmentedlist>
450 <segtitle>Installed Programs</segtitle>
451 <segtitle>Installed Libraries</segtitle>
452 <segtitle>Installed Directories</segtitle>
453
454 <seglistitem>
455 <seg>
456 ffmpeg, ffplay, ffprobe, ffserver, and
457 qt-faststart
458 </seg>
459 <seg>
460 libavcodec.so, libavdevice.so, libavfilter.so,
461 libavformat.so, libavutil.so, libpostproc.so,
462 libswresample, and libswscale.so
463 </seg>
464 <seg>
465 /usr/include/{libavcodec,libavdevice,libavfilter,libavformat},
466 /usr/include/{libavutil,libpostproc,libswresample,libswscale},
467 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
468 /usr/share/ffmpeg
469 </seg>
470 </seglistitem>
471 </segmentedlist>
472
473 <variablelist>
474 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
475 <?dbfo list-presentation="list"?>
476 <?dbhtml list-presentation="table"?>
477
478 <varlistentry id="ffmpeg-prog">
479 <term><command>ffmpeg</command></term>
480 <listitem>
481 <para>
482 is a command-line tool to convert video files, network streams and
483 input from a TV card to several video formats.
484 </para>
485 <indexterm zone="ffmpeg ffmpeg-prog">
486 <primary sortas="b-ffmpeg">ffmpeg</primary>
487 </indexterm>
488 </listitem>
489 </varlistentry>
490
491 <varlistentry id="ffplay">
492 <term><command>ffplay</command></term>
493 <listitem>
494 <para>
495 is a very simple and portable media player using the
496 <filename>ffmpeg</filename> libraries and the SDL library.
497 </para>
498 <indexterm zone="ffmpeg ffplay">
499 <primary sortas="b-ffplay">ffplay</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="ffprobe">
505 <term><command>ffprobe</command></term>
506 <listitem>
507 <para>
508 gathers information from multimedia streams and prints it in a human
509 and machine-readable fashion.
510 </para>
511 <indexterm zone="ffmpeg ffprobe">
512 <primary sortas="b-ffprobe">ffprobe</primary>
513 </indexterm>
514 </listitem>
515 </varlistentry>
516
517 <varlistentry id="ffserver">
518 <term><command>ffserver</command></term>
519 <listitem>
520 <para>
521 is a streaming server for everything that <command>ffmpeg</command>
522 could use as input (files, streams, TV card input, webcam, etc).
523 </para>
524 <indexterm zone="ffmpeg ffserver">
525 <primary sortas="b-ffserver">ffserver</primary>
526 </indexterm>
527 </listitem>
528 </varlistentry>
529
530 <varlistentry id="qt-faststart">
531 <term><command>qt-faststart</command></term>
532 <listitem>
533 <para>
534 moves the index file to the front of quicktime (mov/mp4) videos.
535 </para>
536 <indexterm zone="ffmpeg qt-faststart">
537 <primary sortas="b-qt-faststart">qt-faststart</primary>
538 </indexterm>
539 </listitem>
540 </varlistentry>
541
542 <varlistentry id="libavcodec">
543 <term><filename class="libraryfile">libavcodec.so</filename></term>
544 <listitem>
545 <para>
546 is a library containing the <application>FFmpeg</application> codecs
547 (both encoding and decoding).
548 </para>
549 <indexterm zone="ffmpeg libavcodec">
550 <primary sortas="c-libavcodec">libavcodec.so</primary>
551 </indexterm>
552 </listitem>
553 </varlistentry>
554
555 <varlistentry id="libavdevice">
556 <term><filename class="libraryfile">libavdevice.so</filename></term>
557 <listitem>
558 <para>
559 is the <application>FFmpeg</application> device handling library.
560 </para>
561 <indexterm zone="ffmpeg libavdevice">
562 <primary sortas="c-libavdevice">libavdevice.so</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="libavfilter">
568 <term><filename class="libraryfile">libavfilter.so</filename></term>
569 <listitem>
570 <para>
571 is a library of filters that can alter video or audio between the
572 decoder and the encoder (or output).
573 </para>
574 <indexterm zone="ffmpeg libavfilter">
575 <primary sortas="c-libavfilter">libavfilter.so</primary>
576 </indexterm>
577 </listitem>
578 </varlistentry>
579
580 <varlistentry id="libavformat">
581 <term><filename class="libraryfile">libavformat.so</filename></term>
582 <listitem>
583 <para>
584 is a library containing the file formats handling (mux and demux
585 code for several formats) used by <command>ffplay</command> as well
586 as allowing the generation of audio or video streams.
587 </para>
588 <indexterm zone="ffmpeg libavformat">
589 <primary sortas="c-libavformat">libavformat.so</primary>
590 </indexterm>
591 </listitem>
592 </varlistentry>
593
594 <varlistentry id="libavutil">
595 <term><filename class="libraryfile">libavutil.so</filename></term>
596 <listitem>
597 <para>
598 is the <application>FFmpeg</application> utility library.
599 </para>
600 <indexterm zone="ffmpeg libavutil">
601 <primary sortas="c-libavutil">libavutil.so</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="libpostproc">
607 <term><filename class="libraryfile">libpostproc.so</filename></term>
608 <listitem>
609 <para>
610 is the <application>FFmpeg</application> post processing library.
611 </para>
612 <indexterm zone="ffmpeg libpostproc">
613 <primary sortas="c-libpostproc">libpostproc.so</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617
618 <varlistentry id="libswresample">
619 <term><filename class="libraryfile">libswresample.so</filename></term>
620 <listitem>
621 <para>
622 is the <application>FFmpeg</application> audio rescaling library,
623 it contains functions for converting audio sample formats.
624 </para>
625 <indexterm zone="ffmpeg libswresample">
626 <primary sortas="c-libswresample">libswresample.so</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="libswscale">
632 <term><filename class="libraryfile">libswscale.so</filename></term>
633 <listitem>
634 <para>
635 is the <application>FFmpeg</application> image rescaling library.
636 </para>
637 <indexterm zone="ffmpeg libswscale">
638 <primary sortas="c-libswscale">libswscale.so</primary>
639 </indexterm>
640 </listitem>
641 </varlistentry>
642
643 </variablelist>
644
645 </sect2>
646
647</sect1>
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