source: multimedia/videoutils/ffmpeg.xml@ 7c51f58

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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 "af92a816b642d32134a764d2d7f55b75">
10 <!ENTITY ffmpeg-size "7.4 MB">
11 <!ENTITY ffmpeg-buildsize "133 MB (additional 856 MB for docs and 2302 MB to run the FATE suite)">
12 <!ENTITY ffmpeg-time "1.2 SBU (using parallelism=4); additional 1 SBU for docs and 5.4 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;
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"/> or
113 <xref linkend="gnutls"/>,
114 <xref linkend="fontconfig"/>,
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 <xref linkend="texlive"/> (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
139 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
140 <ulink url="http://linuxtv.org/downloads/v4l-utils/">Video4Linux</ulink>,
141 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
142 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
143 <ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),
144 <ulink url="http://kcat.strangesoft.net/openal-releases/">OpenAL</ulink>, 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=$XORG_PREFIX/lib</userinput></screen>
163-->
164 <para>
165 Install <application>FFmpeg</application> by running the following
166 commands:
167 </para>
168
169<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
170./configure --prefix=/usr \
171 --enable-gpl \
172 --enable-version3 \
173 --enable-nonfree \
174 --disable-static \
175 --enable-shared \
176 --disable-debug \
177 --enable-libass \
178 --enable-libfdk-aac \
179 --enable-libmp3lame \
180 --enable-libtheora \
181 --enable-libvorbis \
182 --enable-libvpx \
183 --enable-libx264 \
184 --enable-x11grab \
185 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
186make &amp;&amp;
187gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
188<!--
189unset LIBRARY_PATH</userinput></screen>-->
190
191 <para>
192 HTML documentation was built in the previous step. If you have
193 <xref linkend="texlive"/> installed and wish to build PDF and
194 Postscript versions of the documentation, issue the following commands:
195 </para>
196
197<screen><userinput>sed -i '$s/$/\n\n@bye/' doc/{git-howto,nut,fate}.texi &amp;&amp;
198sed -i '/machine:i386/ s/\\/@backslashchar{}/g' doc/platform.texi &amp;&amp;
199
200pushd 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 dvips -o $DOCNAME.ps \
206 $DOCNAME.dvi
207done &amp;&amp;
208popd &amp;&amp;
209unset DOCNAME</userinput></screen>
210
211 <para>
212 If you have <xref linkend="doxygen"/> installed and wish to create the API
213 documentation (takes about 350 MB of space), issue the command
214 <command>doxygen doc/Doxyfile</command>.
215 </para>
216
217 <para>
218 The fate-suite tests include comparisons with installed files, and should
219 not be run before the package is installed. Therefore, if you desire to
220 run them, instructions are given further below.
221 </para>
222
223 <para>
224 Now, as the <systemitem class="username">root</systemitem> user:
225 </para>
226
227<screen role="root"><userinput>make install &amp;&amp;
228install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
229install -v -m644 doc/*.txt \
230 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
231
232 <para>
233 If PDF and Postscript documentations were built, issue the following
234 commands, as the <systemitem class="username">root</systemitem> user, to
235 install them:
236 </para>
237
238<screen role="root"><userinput>install -v -m644 doc/*.pdf \
239 /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
240install -v -m644 doc/*.ps \
241 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
242
243 <para>
244 If you used <command>doxygen</command> to create the API documentation,
245 install it (another 300 MB of space) by issuing the following commands
246 as the <systemitem class="username">root</systemitem> user:
247 </para>
248
249<screen role="root"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
250cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
251find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 "{}" ";" &amp;&amp;
252find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 "{}" ";"</userinput></screen>
253
254 <para>
255 To properly test the installation you must have <xref linkend="rsync"/>
256 installed and follow the instructions for the <ulink
257 url="http://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
258 Environment</ulink> (FATE). First, about 882 MB of sample files used to
259 run FATE are downloaded with the command:
260 </para>
261
262<screen><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
263
264 <para>
265 The <filename class="directory">fate-suite</filename> directory is
266 created and the files are downloaded there. That command actually runs an
267 rsync command, to obtain the sample files. You may want to compress and
268 keep this directory for testing again, in another system, or when a new
269 version of ffmpeg is launched. Then, you unpack the sample files in the
270 source directory, and run, again, the <command>make fate-rsync
271 ...</command> command above, to sync with the repository. Now, the
272 download size and time are drastically reduced. Estimated values in
273 "Package Information" do not include the download SBU. Some samples may
274 have been removed, in the new version, so, in order to be sure local and
275 server fate samples are identical, when you use previous samples, run the
276 following command:
277 </para>
278
279<screen><userinput><command>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
280 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</command></userinput></screen>
281
282 <para>
283 Next, FATE is executed, with the commands (you obtain a number of tests
284 larger than 2300):
285 </para>
286
287<screen><userinput>make fate SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
288grep ^TEST ../fate.log | wc -l</userinput></screen>
289
290 </sect2>
291
292 <sect2 role="commands">
293 <title>Command Explanations</title>
294
295 <para>
296 <command>sed -i ... configure</command>: This command adds the
297 <application>ALSA</application> library to the
298 <application>Flite</application> <envar>LDFLAGS</envar> variable and
299 enables the discovery of <application>Flite</application>.
300 </para>
301
302 <para>
303 <command>sed -i ... texi</command>: Fix some .texi files for
304 documentation builds.
305 </para>
306
307 <para>
308 <command>find ... ";"</command>: Fix permissions of documentation files
309 and directories.
310 </para>
311
312 <para>
313 <option>--enable-libfreetype</option>: Enables
314 <application>Freetype</application> support.
315 </para>
316
317 <para>
318 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
319 permits support for postprocessing, swscale and many other features.
320 </para>
321
322 <para>
323 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
324 version 3 code.
325 </para>
326
327 <para>
328 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
329 Note that the resulting libraries and binaries will be unredistributable.
330 </para>
331
332 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
333 href="../../xincludes/static-libraries.xml"/>
334
335 <para>
336 <parameter>--enable-shared</parameter>: Enables building shared
337 libraries, otherwise only static libraries are built and installed.
338 </para>
339
340 <para>
341 <parameter>--disable-debug</parameter>: Disables building debugging
342 symbols into the programs and libraries.
343 </para>
344
345 <para>
346 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
347 rendering via <filename class="libraryfile">libass</filename>.
348 </para>
349
350 <para>
351 <parameter>--enable-libfdk-aac</parameter>: Enables currently the
352 highest-quality AAC audio encoding via <filename
353 class="libraryfile">libfdk-aac</filename>.
354 </para>
355
356 <para>
357 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
358 via <filename class="libraryfile">libmp3lame</filename>.
359 </para>
360
361 <para>
362 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
363 Theora video encoding via <filename
364 class="libraryfile">libvorbis</filename> and <filename
365 class="libraryfile">libtheora</filename>.
366 </para>
367
368 <para>
369 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
370 encoding via <filename class="libraryfile">libvorbis</filename> and
371 <filename class="libraryfile">libvpx</filename>.
372 </para>
373
374 <para>
375 <parameter>--enable-libx264</parameter>: Enables high-quality
376 H.264/MPEG-4 AVC encoding via <filename
377 class="libraryfile">libx264</filename>.
378 </para>
379
380 <para>
381 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
382 </para>
383
384 <para>
385 <option>--enable-openssl</option> or <option>--enable-gnutls</option>:
386 Enables HTTPS protocol for network streams.
387 </para>
388
389 <para>
390 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
391 builds the <command>qt-faststart</command> program which can modify
392 QuickTime formatted movies (<filename class="extension">.mov</filename>
393 or <filename class="extension">.mp4</filename>) so that the header
394 information is located at the beginning of the file instead of the end.
395 This allows the movie file to begin playing before the entire file has
396 been downloaded.
397 </para>
398
399 <note>
400 <para>
401 Support for most of the dependency packages requires using options
402 passed to the <command>configure</command> script. View the output
403 from <command>./configure --help</command> for complete information
404 about enabling dependency packages.
405 </para>
406 </note>
407
408 </sect2>
409
410 <sect2 role="configuration">
411 <title>Configuring FFmpeg</title>
412
413 <sect3 id="ffmpeg-config">
414 <title>Config Files</title>
415
416 <para>
417 <filename>/etc/ffserver.conf</filename> and
418 <filename>~/.ffmpeg/ffserver-config</filename>
419 </para>
420
421 <indexterm zone="ffmpeg ffmpeg-config">
422 <primary
423 sortas="e-AA.ffmpeg-ffserver-config">~/.ffmpeg/ffserver-config</primary>
424 </indexterm>
425
426 <indexterm zone="ffmpeg ffmpeg-config">
427 <primary sortas="e-etc-ffserver.conf">/etc/ffserver.conf</primary>
428 </indexterm>
429
430 <para>
431 You'll find a sample <command>ffserver</command> configuration file at
432 <filename>doc/ffserver.conf</filename> in the source tree.
433 </para>
434
435 </sect3>
436
437 </sect2>
438
439 <sect2 role="content">
440 <title>Contents</title>
441
442 <segmentedlist>
443 <segtitle>Installed Programs</segtitle>
444 <segtitle>Installed Libraries</segtitle>
445 <segtitle>Installed Directories</segtitle>
446
447 <seglistitem>
448 <seg>
449 ffmpeg, ffplay, ffprobe, ffserver, and
450 qt-faststart
451 </seg>
452 <seg>
453 libavcodec.so, libavdevice.so, libavfilter.so,
454 libavformat.so, libavutil.so, libpostproc.so,
455 libswresample, and libswscale.so
456 </seg>
457 <seg>
458 /usr/include/{libavcodec,libavdevice,libavfilter,libavformat},
459 /usr/include/{libavutil,libpostproc,libswresample,libswscale},
460 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
461 /usr/share/ffmpeg
462 </seg>
463 </seglistitem>
464 </segmentedlist>
465
466 <variablelist>
467 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
468 <?dbfo list-presentation="list"?>
469 <?dbhtml list-presentation="table"?>
470
471 <varlistentry id="ffmpeg-prog">
472 <term><command>ffmpeg</command></term>
473 <listitem>
474 <para>
475 is a command-line tool to convert video files, network streams and
476 input from a TV card to several video formats.
477 </para>
478 <indexterm zone="ffmpeg ffmpeg-prog">
479 <primary sortas="b-ffmpeg">ffmpeg</primary>
480 </indexterm>
481 </listitem>
482 </varlistentry>
483
484 <varlistentry id="ffplay">
485 <term><command>ffplay</command></term>
486 <listitem>
487 <para>
488 is a very simple and portable media player using the
489 <filename>ffmpeg</filename> libraries and the SDL library.
490 </para>
491 <indexterm zone="ffmpeg ffplay">
492 <primary sortas="b-ffplay">ffplay</primary>
493 </indexterm>
494 </listitem>
495 </varlistentry>
496
497 <varlistentry id="ffprobe">
498 <term><command>ffprobe</command></term>
499 <listitem>
500 <para>
501 gathers information from multimedia streams and prints it in a human
502 and machine-readable fashion.
503 </para>
504 <indexterm zone="ffmpeg ffprobe">
505 <primary sortas="b-ffprobe">ffprobe</primary>
506 </indexterm>
507 </listitem>
508 </varlistentry>
509
510 <varlistentry id="ffserver">
511 <term><command>ffserver</command></term>
512 <listitem>
513 <para>
514 is a streaming server for everything that <command>ffmpeg</command>
515 could use as input (files, streams, TV card input, webcam, etc).
516 </para>
517 <indexterm zone="ffmpeg ffserver">
518 <primary sortas="b-ffserver">ffserver</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="qt-faststart">
524 <term><command>qt-faststart</command></term>
525 <listitem>
526 <para>
527 moves the index file to the front of quicktime (mov/mp4) videos.
528 </para>
529 <indexterm zone="ffmpeg qt-faststart">
530 <primary sortas="b-qt-faststart">qt-faststart</primary>
531 </indexterm>
532 </listitem>
533 </varlistentry>
534
535 <varlistentry id="libavcodec">
536 <term><filename class="libraryfile">libavcodec.so</filename></term>
537 <listitem>
538 <para>
539 is a library containing the <application>FFmpeg</application> codecs
540 (both encoding and decoding).
541 </para>
542 <indexterm zone="ffmpeg libavcodec">
543 <primary sortas="c-libavcodec">libavcodec.so</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="libavdevice">
549 <term><filename class="libraryfile">libavdevice.so</filename></term>
550 <listitem>
551 <para>
552 is the <application>FFmpeg</application> device handling library.
553 </para>
554 <indexterm zone="ffmpeg libavdevice">
555 <primary sortas="c-libavdevice">libavdevice.so</primary>
556 </indexterm>
557 </listitem>
558 </varlistentry>
559
560 <varlistentry id="libavfilter">
561 <term><filename class="libraryfile">libavfilter.so</filename></term>
562 <listitem>
563 <para>
564 is a library of filters that can alter video or audio between the
565 decoder and the encoder (or output).
566 </para>
567 <indexterm zone="ffmpeg libavfilter">
568 <primary sortas="c-libavfilter">libavfilter.so</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="libavformat">
574 <term><filename class="libraryfile">libavformat.so</filename></term>
575 <listitem>
576 <para>
577 is a library containing the file formats handling (mux and demux
578 code for several formats) used by <command>ffplay</command> as well
579 as allowing the generation of audio or video streams.
580 </para>
581 <indexterm zone="ffmpeg libavformat">
582 <primary sortas="c-libavformat">libavformat.so</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="libavutil">
588 <term><filename class="libraryfile">libavutil.so</filename></term>
589 <listitem>
590 <para>
591 is the <application>FFmpeg</application> utility library.
592 </para>
593 <indexterm zone="ffmpeg libavutil">
594 <primary sortas="c-libavutil">libavutil.so</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598
599 <varlistentry id="libpostproc">
600 <term><filename class="libraryfile">libpostproc.so</filename></term>
601 <listitem>
602 <para>
603 is the <application>FFmpeg</application> post processing library.
604 </para>
605 <indexterm zone="ffmpeg libpostproc">
606 <primary sortas="c-libpostproc">libpostproc.so</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="libswresample">
612 <term><filename class="libraryfile">libswresample.so</filename></term>
613 <listitem>
614 <para>
615 is the <application>FFmpeg</application> audio rescaling library,
616 it contains functions for converting audio sample formats.
617 </para>
618 <indexterm zone="ffmpeg libswresample">
619 <primary sortas="c-libswresample">libswresample.so</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 <varlistentry id="libswscale">
625 <term><filename class="libraryfile">libswscale.so</filename></term>
626 <listitem>
627 <para>
628 is the <application>FFmpeg</application> image rescaling library.
629 </para>
630 <indexterm zone="ffmpeg libswscale">
631 <primary sortas="c-libswscale">libswscale.so</primary>
632 </indexterm>
633 </listitem>
634 </varlistentry>
635
636 </variablelist>
637
638 </sect2>
639
640</sect1>
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