source: multimedia/videoutils/ffmpeg.xml@ 118613f

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 118613f was 118613f, checked in by Fernando de Oliveira <fernando@…>, 10 years ago

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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 "9e6163b09b7b9331b834d80874c2c0ff">
10 <!ENTITY ffmpeg-size "7.1 MB">
11 <!ENTITY ffmpeg-buildsize "130 MB (additional 866 MB for docs and 1902 MB to run the FATE tests)">
12 <!ENTITY ffmpeg-time "3.5 SBU (additional 1.1 SBU for docs and 4.8 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 The fate-suite tests include comparisons with installed files, and should
218 not be run before the package is installed. Therefore, if you desire to
219 run them, instructions are given further below.
220 </para>
221
222 <para>
223 Now, as the <systemitem class="username">root</systemitem> user:
224 </para>
225
226<screen role="root"><userinput>make install &amp;&amp;
227install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
228install -v -m644 doc/*.txt \
229 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
230
231 <para>
232 If PDF and Postscript documentations were built, issue the following
233 commands, as the <systemitem class="username">root</systemitem> user, to
234 install them:
235 </para>
236
237<screen role="root"><userinput>install -v -m644 doc/*.pdf \
238 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
239install -v -m644 doc/*.ps \
240 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
241
242 <para>
243 If you used <command>doxygen</command> to create the API documentation,
244 install it (another 300 MB of space) by issuing the following commands
245 as the <systemitem class="username">root</systemitem> user:
246 </para>
247
248<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
249cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
250find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 "{}" ";" &amp;&amp;
251find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 "{}" ";"</userinput></screen>
252
253 <para>
254 To properly test the installation you must have <xref linkend="rsync"/>
255 installed and follow the instructions for the <ulink
256 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
257 Environment</ulink> (FATE). First, about 879 MB of sample files used to
258 run FATE are downloaded with the command:
259 </para>
260
261<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
262
263 <para>
264 The <filename class="directory">fate-suite</filename> directory is
265 created and the files are downloaded there. That command actually runs
266 <command>rsync -vrltLW --timeout=60 --contimeout=60
267 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command> command,
268 thus you may want to compress and keep this directory for testing again,
269 in another system, or when a new version of ffmpeg is launched. Then, you
270 unpack the sample files in the source directory, and run, again, the
271 <command>make</command> command above, to sync with the repository. Now,
272 the download size and time are drastically reduced. Estimated values in
273 "Package Information" do not include the download SBU. Next, FATE is
274 executed, with the commands (you obtain a number of tests greater than
275 2000):
276 </para>
277
278<screen><userinput>make fate SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
279grep ^TEST ../fate.log | wc -l</userinput></screen>
280
281 </sect2>
282
283 <sect2 role="commands">
284 <title>Command Explanations</title>
285
286 <para>
287 <command>sed -i ... configure</command>: This command adds the
288 <application>ALSA</application> library to the
289 <application>Flite</application> <envar>LDFLAGS</envar> variable and
290 enables the discovery of <application>Flite</application>.
291 </para>
292
293 <para>
294 <command>sed -i ... texi</command>: Fix some .texi files for
295 documentation builds.
296 </para>
297
298 <para>
299 <command>find ... ";"</command>: Fix permissions of documentation files
300 and directories.
301 </para>
302
303 <para>
304 <option>--enable-libfreetype</option>: Enables
305 <application>Freetype</application> support.
306 </para>
307
308 <para>
309 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
310 permits support for postprocessing, swscale and many other features.
311 </para>
312
313 <para>
314 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
315 version 3 code.
316 </para>
317
318 <para>
319 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
320 Note that the resulting libraries and binaries will be unredistributable.
321 </para>
322
323 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
324 href="../../xincludes/static-libraries.xml"/>
325
326 <para>
327 <parameter>--enable-shared</parameter>: Enables building shared
328 libraries, otherwise only static libraries are built and installed.
329 </para>
330
331 <para>
332 <parameter>--disable-debug</parameter>: Disables building debugging
333 symbols into the programs and libraries.
334 </para>
335
336 <para>
337 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
338 rendering via <filename class="libraryfile">libass</filename>.
339 </para>
340
341 <para>
342 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
343 highest-quality AAC audio encoding via <filename
344 class="libraryfile">libfdk-aac</filename>.
345 </para>
346
347 <para>
348 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
349 via <filename class="libraryfile">libmp3lame</filename>.
350 </para>
351
352 <para>
353 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
354 Theora video encoding via <filename
355 class="libraryfile">libvorbis</filename> and <filename
356 class="libraryfile">libtheora</filename>.
357 </para>
358
359 <para>
360 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
361 encoding via <filename class="libraryfile">libvorbis</filename> and
362 <filename class="libraryfile">libvpx</filename>.
363 </para>
364
365 <para>
366 <parameter>--enable-libx264</parameter>: Enables high-quality
367 H.264/MPEG-4 AVC encoding via <filename
368 class="libraryfile">libx264</filename>.
369 </para>
370
371 <para>
372 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
373 </para>
374
375 <para>
376 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
377 builds the <command>qt-faststart</command> program which can modify
378 QuickTime formatted movies (<filename class="extension">.mov</filename>
379 or <filename class="extension">.mp4</filename>) so that the header
380 information is located at the beginning of the file instead of the end.
381 This allows the movie file to begin playing before the entire file has
382 been downloaded.
383 </para>
384
385 <note>
386 <para>
387 Support for most of the dependency packages requires using options
388 passed to the <command>configure</command> script. View the output
389 from <command>./configure --help</command> for complete information
390 about enabling dependency packages.
391 </para>
392 </note>
393
394 </sect2>
395
396 <sect2 role="configuration">
397 <title>Configuring FFmpeg</title>
398
399 <sect3 id="ffmpeg-config">
400 <title>Config Files</title>
401
402 <para>
403 <filename>/etc/ffserver.conf</filename> and
404 <filename>~/.ffmpeg/ffserver-config</filename>
405 </para>
406
407 <indexterm zone="ffmpeg ffmpeg-config">
408 <primary
409 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
410 </indexterm>
411
412 <indexterm zone="ffmpeg ffmpeg-config">
413 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
414 </indexterm>
415
416 <para>
417 You'll find a sample <command>ffserver</command> configuration file at
418 <filename>doc/ffserver.conf</filename> in the source tree.
419 </para>
420
421 </sect3>
422
423 </sect2>
424
425 <sect2 role="content">
426 <title>Contents</title>
427
428 <segmentedlist>
429 <segtitle>Installed Programs</segtitle>
430 <segtitle>Installed Libraries</segtitle>
431 <segtitle>Installed Directories</segtitle>
432
433 <seglistitem>
434 <seg>
435 ffmpeg, ffplay, ffprobe, ffserver, and
436 qt-faststart
437 </seg>
438 <seg>
439 libavcodec.so, libavdevice.so, libavfilter.so,
440 libavformat.so, libavutil.so, libpostproc.so,
441 libswresample, and libswscale.so
442 </seg>
443 <seg>
444 /usr/include/libavcodec,
445 /usr/include/libavdevice,
446 /usr/include/libavfilter,
447 /usr/include/libavformat,
448 /usr/include/libavutil,
449 /usr/include/libpostproc,
450 /usr/include/libswresample
451 /usr/include/libswscale,
452 /usr/share/ffmpeg, and
453 /usr/share/doc/ffmpeg-&ffmpeg-version;
454 </seg>
455 </seglistitem>
456 </segmentedlist>
457
458 <variablelist>
459 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
460 <?dbfo list-presentation="list"?>
461 <?dbhtml list-presentation="table"?>
462
463 <varlistentry id="ffmpeg-prog">
464 <term><command>ffmpeg</command></term>
465 <listitem>
466 <para>
467 is a command-line tool to convert video files, network streams and
468 input from a TV card to several video formats.
469 </para>
470 <indexterm zone="ffmpeg ffmpeg-prog">
471 <primary sortas="b-ffmpeg">ffmpeg</primary>
472 </indexterm>
473 </listitem>
474 </varlistentry>
475
476 <varlistentry id="ffplay">
477 <term><command>ffplay</command></term>
478 <listitem>
479 <para>
480 is a very simple and portable media player using the
481 <filename>ffmpeg</filename> libraries and the SDL library.
482 </para>
483 <indexterm zone="ffmpeg ffplay">
484 <primary sortas="b-ffplay">ffplay</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="ffprobe">
490 <term><command>ffprobe</command></term>
491 <listitem>
492 <para>
493 gathers information from multimedia streams and prints it in a human
494 and machine-readable fashion.
495 </para>
496 <indexterm zone="ffmpeg ffprobe">
497 <primary sortas="b-ffprobe">ffprobe</primary>
498 </indexterm>
499 </listitem>
500 </varlistentry>
501
502 <varlistentry id="ffserver">
503 <term><command>ffserver</command></term>
504 <listitem>
505 <para>
506 is a streaming server for everything that <command>ffmpeg</command>
507 could use as input (files, streams, TV card input, webcam, etc).
508 </para>
509 <indexterm zone="ffmpeg ffserver">
510 <primary sortas="b-ffserver">ffserver</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="qt-faststart">
516 <term><command>qt-faststart</command></term>
517 <listitem>
518 <para>
519 moves the index file to the front of quicktime (mov/mp4) videos.
520 </para>
521 <indexterm zone="ffmpeg qt-faststart">
522 <primary sortas="b-qt-faststart">qt-faststart</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="libavcodec">
528 <term><filename class="libraryfile">libavcodec.so</filename></term>
529 <listitem>
530 <para>
531 is a library containing the <application>FFmpeg</application> codecs
532 (both encoding and decoding).
533 </para>
534 <indexterm zone="ffmpeg libavcodec">
535 <primary sortas="c-libavcodec">libavcodec.so</primary>
536 </indexterm>
537 </listitem>
538 </varlistentry>
539
540 <varlistentry id="libavdevice">
541 <term><filename class="libraryfile">libavdevice.so</filename></term>
542 <listitem>
543 <para>
544 is the <application>FFmpeg</application> device handling library.
545 </para>
546 <indexterm zone="ffmpeg libavdevice">
547 <primary sortas="c-libavdevice">libavdevice.so</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="libavfilter">
553 <term><filename class="libraryfile">libavfilter.so</filename></term>
554 <listitem>
555 <para>
556 is a library of filters that can alter video or audio between the
557 decoder and the encoder (or output).
558 </para>
559 <indexterm zone="ffmpeg libavfilter">
560 <primary sortas="c-libavfilter">libavfilter.so</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="libavformat">
566 <term><filename class="libraryfile">libavformat.so</filename></term>
567 <listitem>
568 <para>
569 is a library containing the file formats handling (mux and demux
570 code for several formats) used by <command>ffplay</command> as well
571 as allowing the generation of audio or video streams.
572 </para>
573 <indexterm zone="ffmpeg libavformat">
574 <primary sortas="c-libavformat">libavformat.so</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="libavutil">
580 <term><filename class="libraryfile">libavutil.so</filename></term>
581 <listitem>
582 <para>
583 is the <application>FFmpeg</application> utility library.
584 </para>
585 <indexterm zone="ffmpeg libavutil">
586 <primary sortas="c-libavutil">libavutil.so</primary>
587 </indexterm>
588 </listitem>
589 </varlistentry>
590
591 <varlistentry id="libpostproc">
592 <term><filename class="libraryfile">libpostproc.so</filename></term>
593 <listitem>
594 <para>
595 is the <application>FFmpeg</application> post processing library.
596 </para>
597 <indexterm zone="ffmpeg libpostproc">
598 <primary sortas="c-libpostproc">libpostproc.so</primary>
599 </indexterm>
600 </listitem>
601 </varlistentry>
602
603 <varlistentry id="libswresample">
604 <term><filename class="libraryfile">libswresample.so</filename></term>
605 <listitem>
606 <para>
607 is the <application>FFmpeg</application> audio rescaling library,
608 it contains functions for converting audio sample formats.
609 </para>
610 <indexterm zone="ffmpeg libswresample">
611 <primary sortas="c-libswresample">libswresample.so</primary>
612 </indexterm>
613 </listitem>
614 </varlistentry>
615
616 <varlistentry id="libswscale">
617 <term><filename class="libraryfile">libswscale.so</filename></term>
618 <listitem>
619 <para>
620 is the <application>FFmpeg</application> image rescaling library.
621 </para>
622 <indexterm zone="ffmpeg libswscale">
623 <primary sortas="c-libswscale">libswscale.so</primary>
624 </indexterm>
625 </listitem>
626 </varlistentry>
627
628 </variablelist>
629
630 </sect2>
631
632</sect1>
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