source: multimedia/videoutils/ffmpeg.xml@ a1446bf

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.7 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 krejzi/svn 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 a1446bf was 791213b, checked in by Fernando de Oliveira <fernando@…>, 10 years ago

Update to ffmpeg-2.4.1.
VLC-2.1.5 and Transcode-1.1.7: fix build with ffmpeg-2.4.1. Thanks Armin.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@14489 af4574ff-66df-0310-9fd7-8a98e5e911e0

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY ffmpeg-download-http "http://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.bz2">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "c36caa8d29b3677dcb7bd8c546890c9d">
10 <!ENTITY ffmpeg-size "7.1 MB">
11 <!ENTITY ffmpeg-buildsize "130 MB (additional 870 MB for docs and 1903 MB to run the FATE tests)">
12 <!ENTITY ffmpeg-time "3.5 SBU (additional 0.9 SBU for docs and 5 SBU to run the FATE tests, 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 &lfs76_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="yasm"/>,
85 <xref linkend="libass"/>,
86 <xref linkend="fdk-aac"/>,
87 <xref linkend="lame"/>,
88 <xref linkend="libtheora"/>,
89 <xref linkend="libvorbis"/>,
90 <xref linkend="libvpx"/>, and
91 <xref linkend="x264"/>
92 </para>
93
94 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
95 <para>
96 <xref linkend="x-window-system"/>,
97 <xref linkend="alsa-lib"/>,
98 <xref linkend="sdl"/>,
99 <xref linkend="libva"/> and
100 <xref linkend="libvdpau"/> (with the corresponding driver package)
101 </para>
102
103 <bridgehead renderas="sect4">Optional</bridgehead>
104 <para role="optional">
105 <xref linkend="faac"/>,
106 <xref linkend="freetype2"/>,
107 <xref linkend="libwebp"/>,
108 <xref linkend="openjpeg"/>,
109 <xref linkend="pulseaudio"/>,
110 <xref linkend="speex"/>,
111 <xref linkend="xvid"/>,
112 <xref linkend="openssl"/>,
113 <xref linkend="fontconfig"/>,
114 <xref linkend="gnutls"/>,
115 <xref linkend="opus"/>,
116<!-- <ulink url="http://www.piksel.org/frei0r">frei0r</ulink>,-->
117 <ulink url="https://files.dyne.org/frei0r/snapshots/">frei0r</ulink>,
118 <ulink url="http://xhevc.com/en/hevc/decoder/download.jsp">HEVC/H.265</ulink>,
119 <ulink url="http://www.ladspa.org/">LADSPA</ulink>,
120 <ulink url="http://www.libssh.org/">libssh</ulink>,
121 <ulink url="http://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>,
122 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
123 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
124 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
125 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
126 <ulink url="http://ftp.gnu.org/pub/gnu/libcdio/">libcdio</ulink>,
127 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
128 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
129 <ulink url="http://www.quut.com/gsm/">GSM</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://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
135 <ulink url="http://opencv.org/">OpenCV</ulink>,
136 <ulink url="http://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
137 <ulink url="http://diracvideo.org/">Schroedinger</ulink>,
138 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
139 <ulink url="http://linuxtv.org/downloads/v4l-utils/">Video4Linux</ulink>,
140 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
141 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
142 <ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),
143 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>, and
144 <ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</ulink>
145 </para>
146
147 <para condition="html" role="usernotes">
148 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
149 </para>
150 </sect2>
151
152 <sect2 role="installation">
153 <title>Installation of FFmpeg</title>
154
155<!--<para>
156 If <application>Xorg</application> is installed in a prefix other
157 than <filename class='directory'>/usr</filename>, the build will fail. Fix
158 this by issuing the following command:
159 </para>
160
161<screen><userinput>export LIBRARY_PATH=$XORG_PREFIX/lib</userinput></screen>
162-->
163 <para>
164 Install <application>FFmpeg</application> by running the following
165 commands:
166 </para>
167
168<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
169./configure --prefix=/usr \
170 --enable-gpl \
171 --enable-version3 \
172 --enable-nonfree \
173 --disable-static \
174 --enable-shared \
175 --disable-debug \
176 --enable-libass \
177 --enable-libfdk-aac \
178 --enable-libmp3lame \
179 --enable-libtheora \
180 --enable-libvorbis \
181 --enable-libvpx \
182 --enable-libx264 \
183 --enable-x11grab \
184 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
185make &amp;&amp;
186gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
187<!--
188unset LIBRARY_PATH</userinput></screen>-->
189
190 <para>
191 HTML documentation was built in the previous step. If you have
192 <xref linkend="texlive"/> installed and wish to build PDF and
193 Postscript versions of the documentation, issue the following commands:
194 </para>
195
196<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
197sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
198
199pushd doc &amp;&amp;
200for DOCNAME in `basename -s .html *.html`
201do
202 texi2pdf -b $DOCNAME.texi &amp;&amp;
203 texi2dvi -b $DOCNAME.texi &amp;&amp;
204 dvips -o $DOCNAME.ps \
205 $DOCNAME.dvi
206done &amp;&amp;
207popd &amp;&amp;
208unset DOCNAME</userinput></screen>
209
210 <para>
211 If you have <xref linkend="doxygen"/> installed and wish to create the API
212 documentation (takes about 350 MB of space), issue the command
213 <command>doxygen doc/Doxyfile</command>.
214 </para>
215
216 <para>
217 To properly test the installation you must have <xref linkend="rsync"/>
218 installed and follow the instructions for the
219 <ulink url="http://www.ffmpeg.org/fate.html">
220 FFmpeg Automated Testing Environment</ulink> (FATE). First, about 879 MB
221 of sample files used to run FATE are downloaded with the command:
222 </para>
223
224<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
225
226 <para>
227 The <filename class="directory">fate-suite</filename> directory is
228 created and the files are downloaded there. That command actually runs
229 <command>rsync -vrltLW --timeout=60 --contimeout=60 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command>
230 command, thus you may want to compress and keep this directory for
231 testing again, in another system, or when a new version of ffmpeg is
232 launched. Then, you unpack the sample files in the source directory, and
233 run, again, the <command>make</command> command above, to sync with the
234 repository. Now, the download size and time are drastically reduced.
235 Estimated values in "Package Information" do not include the download
236 SBU. Next, FATE is executed, with the commands (you obtain a number of
237 tests greater than 2000):
238 </para>
239
240<screen><userinput>make fate SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
241grep ^TEST ../fate.log | wc -l</userinput></screen>
242
243 <para>
244 Now, as the <systemitem class="username">root</systemitem> user:
245 </para>
246
247<screen role="root"><userinput>make install &amp;&amp;
248install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
249install -v -m644 doc/*.txt \
250 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
251
252 <para>
253 If PDF and Postscript documentations were built, issue the following
254 commands, as the <systemitem class="username">root</systemitem> user, to
255 install them:
256 </para>
257
258<screen role="root"><userinput>install -v -m644 doc/*. pdf \
259 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
260install -v -m644 doc/*.ps \
261 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
262
263 <para>
264 If you used <command>doxygen</command> to create the API documentation,
265 install it (another 300 MB of space) by issuing the following commands
266 as the <systemitem class="username">root</systemitem> user:
267 </para>
268
269<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
270cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
271find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 "{}" ";" &amp;&amp;
272find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 "{}" ";"</userinput></screen>
273
274 </sect2>
275
276 <sect2 role="commands">
277 <title>Command Explanations</title>
278
279 <para>
280 <command>sed -i ... configure</command>: This command adds the
281 <application>ALSA</application> library to the
282 <application>Flite</application> <envar>LDFLAGS</envar> variable and
283 enables the discovery of <application>Flite</application>.
284 </para>
285
286 <para>
287 <command>sed -i ... texi</command>: Fix some .texi files for
288 documentation builds.
289 </para>
290
291 <para>
292 <command>find ... ";"</command>: Fix permissions of documentation files
293 and directories.
294 </para>
295
296 <para>
297 <option>--enable-libfreetype</option>: Enables
298 <application>Freetype</application> support.
299 </para>
300
301 <para>
302 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
303 permits support for postprocessing, swscale and many other features.
304 </para>
305
306 <para>
307 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
308 version 3 code.
309 </para>
310
311 <para>
312 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree
313 code. Note that the resulting libraries and binaries will be
314 unredistributable.
315 </para>
316
317 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
318 href="../../xincludes/static-libraries.xml"/>
319
320 <para>
321 <parameter>--enable-shared</parameter>: Enables building shared libraries,
322 otherwise only static libraries are built and installed.
323 </para>
324
325 <para>
326 <parameter>--disable-debug</parameter>: Disables building debugging
327 symbols into the programs and libraries.
328 </para>
329
330 <para>
331 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
332 rendering via <filename class="libraryfile">libass</filename>.
333 </para>
334
335 <para>
336 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
337 highest-quality AAC audio encoding via <filename
338 class="libraryfile">libfdk-aac</filename>.
339 </para>
340
341 <para>
342 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding via
343 <filename class="libraryfile">libmp3lame</filename>.
344 </para>
345
346 <para>
347 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
348 Theora video encoding via <filename
349 class="libraryfile">libvorbis</filename> and <filename
350 class="libraryfile">libtheora</filename>.
351 </para>
352
353 <para>
354 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
355 encoding via <filename class="libraryfile">libvorbis</filename> and
356 <filename class="libraryfile">libvpx</filename>.
357 </para>
358
359 <para>
360 <parameter>--enable-libx264</parameter>: Enables high-quality H.264/MPEG-4
361 AVC encoding via <filename class="libraryfile">libx264</filename>.
362 </para>
363
364 <para>
365 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
366 </para>
367
368 <para>
369 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>:
370 This builds the <command>qt-faststart</command> program which can
371 modify QuickTime formatted movies
372 (<filename class="extension">.mov</filename> or
373 <filename class="extension">.mp4</filename>) so that the header information
374 is located at the beginning of the file instead of the end. This allows
375 the movie file to begin playing before the entire file has been downloaded.
376 </para>
377
378 <note>
379 <para>
380 Support for most of the dependency packages requires using options
381 passed to the <command>configure</command> script. View the output
382 from <command>./configure --help</command> for complete information
383 about enabling dependency packages.
384 </para>
385 </note>
386
387 </sect2>
388
389 <sect2 role="configuration">
390 <title>Configuring FFmpeg</title>
391
392 <sect3 id="ffmpeg-config">
393 <title>Config Files</title>
394
395 <para>
396 <filename>/etc/ffserver.conf</filename> and
397 <filename>~/.ffmpeg/ffserver-config</filename>
398 </para>
399
400 <indexterm zone="ffmpeg ffmpeg-config">
401 <primary
402 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
403 </indexterm>
404
405 <indexterm zone="ffmpeg ffmpeg-config">
406 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
407 </indexterm>
408
409 <para>
410 You'll find a sample <command>ffserver</command> configuration file at
411 <filename>doc/ffserver.conf</filename> in the source tree.
412 </para>
413
414 </sect3>
415
416 </sect2>
417
418 <sect2 role="content">
419 <title>Contents</title>
420
421 <segmentedlist>
422 <segtitle>Installed Programs</segtitle>
423 <segtitle>Installed Libraries</segtitle>
424 <segtitle>Installed Directories</segtitle>
425
426 <seglistitem>
427 <seg>
428 ffmpeg, ffplay, ffprobe, ffserver, and
429 qt-faststart
430 </seg>
431 <seg>
432 libavcodec.so, libavdevice.so, libavfilter.so,
433 libavformat.so, libavutil.so, libpostproc.so,
434 libswresample, and libswscale.so
435 </seg>
436 <seg>
437 /usr/include/libavcodec,
438 /usr/include/libavdevice,
439 /usr/include/libavfilter,
440 /usr/include/libavformat,
441 /usr/include/libavutil,
442 /usr/include/libpostproc,
443 /usr/include/libswresample
444 /usr/include/libswscale,
445 /usr/share/ffmpeg, and
446 /usr/share/doc/ffmpeg-&ffmpeg-version;
447 </seg>
448 </seglistitem>
449 </segmentedlist>
450
451 <variablelist>
452 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
453 <?dbfo list-presentation="list"?>
454 <?dbhtml list-presentation="table"?>
455
456 <varlistentry id="ffmpeg-prog">
457 <term><command>ffmpeg</command></term>
458 <listitem>
459 <para>
460 is a command-line tool to convert video files, network streams and
461 input from a TV card to several video formats.
462 </para>
463 <indexterm zone="ffmpeg ffmpeg-prog">
464 <primary sortas="b-ffmpeg">ffmpeg</primary>
465 </indexterm>
466 </listitem>
467 </varlistentry>
468
469 <varlistentry id="ffplay">
470 <term><command>ffplay</command></term>
471 <listitem>
472 <para>
473 is a very simple and portable media player using the
474 <filename>ffmpeg</filename> libraries and the SDL library.
475 </para>
476 <indexterm zone="ffmpeg ffplay">
477 <primary sortas="b-ffplay">ffplay</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="ffprobe">
483 <term><command>ffprobe</command></term>
484 <listitem>
485 <para>
486 gathers information from multimedia streams and prints it in a human
487 and machine-readable fashion.
488 </para>
489 <indexterm zone="ffmpeg ffprobe">
490 <primary sortas="b-ffprobe">ffprobe</primary>
491 </indexterm>
492 </listitem>
493 </varlistentry>
494
495 <varlistentry id="ffserver">
496 <term><command>ffserver</command></term>
497 <listitem>
498 <para>
499 is a streaming server for everything that <command>ffmpeg</command>
500 could use as input (files, streams, TV card input, webcam, etc).
501 </para>
502 <indexterm zone="ffmpeg ffserver">
503 <primary sortas="b-ffserver">ffserver</primary>
504 </indexterm>
505 </listitem>
506 </varlistentry>
507
508 <varlistentry id="qt-faststart">
509 <term><command>qt-faststart</command></term>
510 <listitem>
511 <para>
512 moves the index file to the front of quicktime (mov/mp4) videos.
513 </para>
514 <indexterm zone="ffmpeg qt-faststart">
515 <primary sortas="b-qt-faststart">qt-faststart</primary>
516 </indexterm>
517 </listitem>
518 </varlistentry>
519
520 <varlistentry id="libavcodec">
521 <term><filename class="libraryfile">libavcodec.so</filename></term>
522 <listitem>
523 <para>
524 is a library containing the <application>FFmpeg</application> codecs
525 (both encoding and decoding).
526 </para>
527 <indexterm zone="ffmpeg libavcodec">
528 <primary sortas="c-libavcodec">libavcodec.so</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="libavdevice">
534 <term><filename class="libraryfile">libavdevice.so</filename></term>
535 <listitem>
536 <para>
537 is the <application>FFmpeg</application> device handling library.
538 </para>
539 <indexterm zone="ffmpeg libavdevice">
540 <primary sortas="c-libavdevice">libavdevice.so</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="libavfilter">
546 <term><filename class="libraryfile">libavfilter.so</filename></term>
547 <listitem>
548 <para>
549 is a library of filters that can alter video or audio between the
550 decoder and the encoder (or output).
551 </para>
552 <indexterm zone="ffmpeg libavfilter">
553 <primary sortas="c-libavfilter">libavfilter.so</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="libavformat">
559 <term><filename class="libraryfile">libavformat.so</filename></term>
560 <listitem>
561 <para>
562 is a library containing the file formats handling (mux and demux
563 code for several formats) used by <command>ffplay</command> as well
564 as allowing the generation of audio or video streams.
565 </para>
566 <indexterm zone="ffmpeg libavformat">
567 <primary sortas="c-libavformat">libavformat.so</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
572 <varlistentry id="libavutil">
573 <term><filename class="libraryfile">libavutil.so</filename></term>
574 <listitem>
575 <para>
576 is the <application>FFmpeg</application> utility library.
577 </para>
578 <indexterm zone="ffmpeg libavutil">
579 <primary sortas="c-libavutil">libavutil.so</primary>
580 </indexterm>
581 </listitem>
582 </varlistentry>
583
584 <varlistentry id="libpostproc">
585 <term><filename class="libraryfile">libpostproc.so</filename></term>
586 <listitem>
587 <para>
588 is the <application>FFmpeg</application> post processing library.
589 </para>
590 <indexterm zone="ffmpeg libpostproc">
591 <primary sortas="c-libpostproc">libpostproc.so</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
596 <varlistentry id="libswresample">
597 <term><filename class="libraryfile">libswresample.so</filename></term>
598 <listitem>
599 <para>
600 is the <application>FFmpeg</application> audio rescaling library,
601 it contains functions for converting audio sample formats.
602 </para>
603 <indexterm zone="ffmpeg libswresample">
604 <primary sortas="c-libswresample">libswresample.so</primary>
605 </indexterm>
606 </listitem>
607 </varlistentry>
608
609 <varlistentry id="libswscale">
610 <term><filename class="libraryfile">libswscale.so</filename></term>
611 <listitem>
612 <para>
613 is the <application>FFmpeg</application> image rescaling library.
614 </para>
615 <indexterm zone="ffmpeg libswscale">
616 <primary sortas="c-libswscale">libswscale.so</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 </variablelist>
622
623 </sect2>
624
625</sect1>
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