source: multimedia/videoutils/ffmpeg.xml@ 80d4245

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.6 7.6-blfs 7.6-systemd 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind gnome kde5-13430 kde5-14269 kde5-14686 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 systemd-11177 systemd-13485 trunk upgradedb xry111/intltool xry111/llvm18 xry111/soup3 xry111/test-20220226 xry111/xf86-video-removal
Last change on this file since 80d4245 was 80d4245, checked in by Fernando de Oliveira <fernando@…>, 10 years ago

ffmpeg-2.2.4: revert format of optional dependencies. Thanks Bruce.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@13317 af4574ff-66df-0310-9fd7-8a98e5e911e0
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File size: 22.1 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 "5b85aea53d8dcd5b0f7b497f233bc101">
10 <!ENTITY ffmpeg-size "6.7 MB">
11 <!ENTITY ffmpeg-buildsize "112 MB (additional 764 MB for docs and 1813 MB to run the FATE tests)">
12 <!ENTITY ffmpeg-time " 2.9 SBU (additional 1.2 SBU for docs and 7.2 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 &lfs75_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="opus"/>,
89 <xref linkend="libtheora"/>,
90 <xref linkend="libvorbis"/>,
91 <xref linkend="libvpx"/>, and
92 <xref linkend="x264"/>
93 </para>
94
95 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
96 <para>
97 <xref linkend="x-window-system"/>,
98 <xref linkend="alsa-lib"/>,
99 <xref linkend="sdl"/>,
100 <xref linkend="libva"/> and
101 <xref linkend="libvdpau"/> (with the corresponding driver package)
102 </para>
103
104 <bridgehead renderas="sect4">Optional</bridgehead>
105 <para role="optional">
106 <xref linkend="faac"/>,
107 <xref linkend="freetype2"/>,
108 <xref linkend="libwebp"/>,
109 <xref linkend="openjpeg"/>,
110 <xref linkend="pulseaudio"/>,
111 <xref linkend="speex"/>,
112 <xref linkend="xvid"/>,
113 <xref linkend="openssl"/>,
114 <xref linkend="fontconfig"/>,
115 <xref linkend="gnutls"/>,
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>,
144 <ulink url="http://www.nongnu.org/texi2html">texi2html</ulink> (to build HTML documentation), and
145 <ulink url="http://www.videolan.org/developers/x265.html">x265 (H.265/MPEG-H HEVC)</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./configure --prefix=/usr \
171 --enable-gpl \
172 --enable-version3 \
173 --enable-nonfree \
174 --disable-static \
175 --enable-shared \
176 --disable-debug \
177 --enable-libass \
178 --enable-libfdk-aac \
179 --enable-libmp3lame \
180 --enable-libopus \
181 --enable-libtheora \
182 --enable-libvorbis \
183 --enable-libvpx \
184 --enable-libx264 \
185 --enable-x11grab &amp;&amp;
186make &amp;&amp;
187gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
188<!--
189unset LIBRARY_PATH</userinput></screen>-->
190
191 <para>
192 HTML documentation was built in the previous step if
193 <ulink url="http://www.nongnu.org/texi2html">texi2html</ulink> is
194 installed. If the HTML was built (check for any
195 <filename class="extension">.html</filename> files in the
196 <filename class="directory">doc</filename> directory) and you have
197 <xref linkend="texlive"/> installed and wish to build PDF and
198 Postscript versions of the documentation, issue the following commands:
199 </para>
200
201<screen><userinput>pushd doc &amp;&amp;
202for DOCNAME in `basename -s .html *.html`
203do
204 texi2pdf -b $DOCNAME.texi &amp;&amp;
205 texi2dvi -b $DOCNAME.texi &amp;&amp;
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 and wish to create the API
214 documentation (takes about 350 MB of space), issue the command
215 <command>doxygen doc/Doxyfile</command>.
216 </para>
217
218 <para>
219 To properly test the installation you must have <xref linkend="rsync"/>
220 installed and follow the instructions for the
221 <ulink url="http://www.ffmpeg.org/fate.html">
222 FFmpeg Automated Testing Environment</ulink> (FATE). First, over 760 MB
223 of sample files used to run FATE are downloaded with the command:
224 </para>
225
226<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
227
228 <para>
229 The <filename class="directory">fate-suite</filename> directory is
230 created and the files are downloaded there. That command actually runs
231 <command>rsync -vrltLW --timeout=60 --contimeout=60 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command>
232 command, thus you may want to compress and keep this directory for
233 testing again, in another system, or when a new version of ffmpeg is
234 launched. Then, you unpack the sample files in the source directory, and
235 run, again, the <command>make</command> command above, to sync with the
236 repository. Now, the download size and time are drastically reduced.
237 Estimated values in "Package Information" do not include the download
238 SBU. Next, FATE is executed, with the commands (you obtain a number of
239 tests greater than 1900):
240 </para>
241
242<screen><userinput>make fate SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
243grep ^TEST ../fate.log | wc -l</userinput></screen>
244
245 <para>
246 Now, as the <systemitem class="username">root</systemitem> user:
247 </para>
248
249<screen role="root"><userinput>make install &amp;&amp;
250install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
251install -v -m755 -d /usr/share/doc/ffmpeg &amp;&amp;
252install -v -m644 doc/*.txt \
253 /usr/share/doc/ffmpeg</userinput></screen>
254
255 <para>
256 If HTML documentation was built, issue the following command to install it:
257 </para>
258
259<screen role="root"><userinput>install -v -m644 doc/*.html \
260 /usr/share/doc/ffmpeg</userinput></screen>
261
262 <para>
263 If you used <command>doxygen</command> to create the API documentation,
264 install it (another 300 MB of space) by issuing the following commands
265 as the <systemitem class="username">root</systemitem> user:
266 </para>
267
268<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg/api &amp;&amp;
269install -v -m644 doc/doxy/html/* \
270 /usr/share/doc/ffmpeg/api</userinput></screen>
271
272 </sect2>
273
274 <sect2 role="commands">
275 <title>Command Explanations</title>
276
277 <para>
278 <command>sed -i ...</command>: This command adds the
279 <application>ALSA</application> library to the
280 <application>Flite</application> <envar>LDFLAGS</envar> variable and
281 enables the discovery of <application>Flite</application>.
282 </para>
283
284 <para>
285 <option>--enable-libfreetype</option>: Enables
286 <application>Freetype</application> support.
287 </para>
288
289 <para>
290 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
291 permits support for postprocessing, swscale and many other features.
292 </para>
293
294 <para>
295 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
296 version 3 code.
297 </para>
298
299 <para>
300 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree
301 code. Note that the resulting libraries and binaries will be
302 unredistributable.
303 </para>
304
305 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
306 href="../../xincludes/static-libraries.xml"/>
307
308 <para>
309 <parameter>--enable-shared</parameter>: Enables building shared libraries,
310 otherwise only static libraries are built and installed.
311 </para>
312
313 <para>
314 <parameter>--disable-debug</parameter>: Disables building debugging
315 symbols into the programs and libraries.
316 </para>
317
318 <para>
319 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
320 rendering via <filename class="libraryfile">libass</filename>.
321 </para>
322
323 <para>
324 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
325 highest-quality AAC audio encoding via <filename
326 class="libraryfile">libfdk-aac</filename>.
327 </para>
328
329 <para>
330 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding via
331 <filename class="libraryfile">libmp3lame</filename>.
332 </para>
333
334 <para>
335 <parameter>--enable-libopus</parameter>: Enables Opus encoding for low
336 latency streaming via <filename class="libraryfile">libopus</filename>.
337 </para>
338
339 <para>
340 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
341 Theora video encoding via <filename
342 class="libraryfile">libvorbis</filename> and <filename
343 class="libraryfile">libtheora</filename>.
344 </para>
345
346 <para>
347 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
348 encoding via <filename class="libraryfile">libvorbis</filename> and
349 <filename class="libraryfile">libvpx</filename>.
350 </para>
351
352 <para>
353 <parameter>--enable-libx264</parameter>: Enables high-quality H.264/MPEG-4
354 AVC encoding via <filename class="libraryfile">libx264</filename>.
355 </para>
356
357 <para>
358 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
359 </para>
360
361 <para>
362 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>:
363 This builds the <command>qt-faststart</command> program which can
364 modify QuickTime formatted movies
365 (<filename class="extension">.mov</filename> or
366 <filename class="extension">.mp4</filename>) so that the header information
367 is located at the beginning of the file instead of the end. This allows
368 the movie file to begin playing before the entire file has been downloaded.
369 </para>
370
371 <note>
372 <para>
373 Support for most of the dependency packages requires using options
374 passed to the <command>configure</command> script. View the output
375 from <command>./configure --help</command> for complete information
376 about enabling dependency packages.
377 </para>
378 </note>
379
380 </sect2>
381
382 <sect2 role="configuration">
383 <title>Configuring FFmpeg</title>
384
385 <sect3 id="ffmpeg-config">
386 <title>Config Files</title>
387
388 <para>
389 <filename>/etc/ffserver.conf</filename> and
390 <filename>~/.ffmpeg/ffserver-config</filename>
391 </para>
392
393 <indexterm zone="ffmpeg ffmpeg-config">
394 <primary
395 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
396 </indexterm>
397
398 <indexterm zone="ffmpeg ffmpeg-config">
399 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
400 </indexterm>
401
402 <para>
403 You'll find a sample <command>ffserver</command> configuration file at
404 <filename>doc/ffserver.conf</filename> in the source tree.
405 </para>
406
407 </sect3>
408
409 </sect2>
410
411 <sect2 role="content">
412 <title>Contents</title>
413
414 <segmentedlist>
415 <segtitle>Installed Programs</segtitle>
416 <segtitle>Installed Libraries</segtitle>
417 <segtitle>Installed Directories</segtitle>
418
419 <seglistitem>
420 <seg>
421 ffmpeg, ffplay, ffprobe, ffserver, and
422 qt-faststart
423 </seg>
424 <seg>
425 libavcodec.so, libavdevice.so, libavfilter.so,
426 libavformat.so, libavutil.so, libpostproc.so,
427 libswresample, and libswscale.so
428 </seg>
429 <seg>
430 /usr/include/libavcodec,
431 /usr/include/libavdevice,
432 /usr/include/libavfilter,
433 /usr/include/libavformat,
434 /usr/include/libavutil,
435 /usr/include/libpostproc,
436 /usr/include/libswresample
437 /usr/include/libswscale,
438 /usr/share/ffmpeg, and
439 /usr/share/doc/ffmpeg
440 </seg>
441 </seglistitem>
442 </segmentedlist>
443
444 <variablelist>
445 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
446 <?dbfo list-presentation="list"?>
447 <?dbhtml list-presentation="table"?>
448
449 <varlistentry id="ffmpeg-prog">
450 <term><command>ffmpeg</command></term>
451 <listitem>
452 <para>
453 is a command-line tool to convert video files, network streams and
454 input from a TV card to several video formats.
455 </para>
456 <indexterm zone="ffmpeg ffmpeg-prog">
457 <primary sortas="b-ffmpeg">ffmpeg</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="ffplay">
463 <term><command>ffplay</command></term>
464 <listitem>
465 <para>
466 is a very simple and portable media player using the
467 <filename>ffmpeg</filename> libraries and the SDL library.
468 </para>
469 <indexterm zone="ffmpeg ffplay">
470 <primary sortas="b-ffplay">ffplay</primary>
471 </indexterm>
472 </listitem>
473 </varlistentry>
474
475 <varlistentry id="ffprobe">
476 <term><command>ffprobe</command></term>
477 <listitem>
478 <para>
479 gathers information from multimedia streams and prints it in a human
480 and machine-readable fashion.
481 </para>
482 <indexterm zone="ffmpeg ffprobe">
483 <primary sortas="b-ffprobe">ffprobe</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="ffserver">
489 <term><command>ffserver</command></term>
490 <listitem>
491 <para>
492 is a streaming server for everything that <command>ffmpeg</command>
493 could use as input (files, streams, TV card input, webcam, etc).
494 </para>
495 <indexterm zone="ffmpeg ffserver">
496 <primary sortas="b-ffserver">ffserver</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
501 <varlistentry id="qt-faststart">
502 <term><command>qt-faststart</command></term>
503 <listitem>
504 <para>
505 moves the index file to the front of quicktime (mov/mp4) videos.
506 </para>
507 <indexterm zone="ffmpeg qt-faststart">
508 <primary sortas="b-qt-faststart">qt-faststart</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="libavcodec">
514 <term><filename class="libraryfile">libavcodec.so</filename></term>
515 <listitem>
516 <para>
517 is a library containing the <application>FFmpeg</application> codecs
518 (both encoding and decoding).
519 </para>
520 <indexterm zone="ffmpeg libavcodec">
521 <primary sortas="c-libavcodec">libavcodec.so</primary>
522 </indexterm>
523 </listitem>
524 </varlistentry>
525
526 <varlistentry id="libavdevice">
527 <term><filename class="libraryfile">libavdevice.so</filename></term>
528 <listitem>
529 <para>
530 is the <application>FFmpeg</application> device handling library.
531 </para>
532 <indexterm zone="ffmpeg libavdevice">
533 <primary sortas="c-libavdevice">libavdevice.so</primary>
534 </indexterm>
535 </listitem>
536 </varlistentry>
537
538 <varlistentry id="libavfilter">
539 <term><filename class="libraryfile">libavfilter.so</filename></term>
540 <listitem>
541 <para>
542 is a library of filters that can alter video or audio between the
543 decoder and the encoder (or output).
544 </para>
545 <indexterm zone="ffmpeg libavfilter">
546 <primary sortas="c-libavfilter">libavfilter.so</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="libavformat">
552 <term><filename class="libraryfile">libavformat.so</filename></term>
553 <listitem>
554 <para>
555 is a library containing the file formats handling (mux and demux
556 code for several formats) used by <command>ffplay</command> as well
557 as allowing the generation of audio or video streams.
558 </para>
559 <indexterm zone="ffmpeg libavformat">
560 <primary sortas="c-libavformat">libavformat.so</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="libavutil">
566 <term><filename class="libraryfile">libavutil.so</filename></term>
567 <listitem>
568 <para>
569 is the <application>FFmpeg</application> utility library.
570 </para>
571 <indexterm zone="ffmpeg libavutil">
572 <primary sortas="c-libavutil">libavutil.so</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="libpostproc">
578 <term><filename class="libraryfile">libpostproc.so</filename></term>
579 <listitem>
580 <para>
581 is the <application>FFmpeg</application> post processing library.
582 </para>
583 <indexterm zone="ffmpeg libpostproc">
584 <primary sortas="c-libpostproc">libpostproc.so</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="libswresample">
590 <term><filename class="libraryfile">libswresample.so</filename></term>
591 <listitem>
592 <para>
593 is the <application>FFmpeg</application> audio rescaling library,
594 it contains functions for converting audio sample formats.
595 </para>
596 <indexterm zone="ffmpeg libswresample">
597 <primary sortas="c-libswresample">libswresample.so</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
602 <varlistentry id="libswscale">
603 <term><filename class="libraryfile">libswscale.so</filename></term>
604 <listitem>
605 <para>
606 is the <application>FFmpeg</application> image rescaling library.
607 </para>
608 <indexterm zone="ffmpeg libswscale">
609 <primary sortas="c-libswscale">libswscale.so</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 </variablelist>
615
616 </sect2>
617
618</sect1>
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