source: multimedia/videoutils/ffmpeg.xml@ a161de9

10.0 10.1 11.0 11.1 11.2 11.3 12.0 12.1 7.10 7.4 7.5 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 a161de9 was a161de9, checked in by Randy McMurchy <randy@…>, 11 years ago

Updated FFmpeg to 1.1.2

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@11014 af4574ff-66df-0310-9fd7-8a98e5e911e0
  • Property mode set to 100644
File size: 22.6 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
8 "http://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.bz2">
9 <!ENTITY ffmpeg-download-ftp " ">
10 <!ENTITY ffmpeg-md5sum "7434c0b38be2ce9c4344d067cc0067f5">
11 <!ENTITY ffmpeg-size "5.8 MB">
12 <!ENTITY ffmpeg-buildsize "100 MB">
13 <!ENTITY ffmpeg-time "4.0 SBU">
14]>
15
16<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
17 <?dbhtml filename="ffmpeg.html"?>
18
19 <sect1info>
20 <othername>$LastChangedBy$</othername>
21 <date>$Date$</date>
22 </sect1info>
23
24 <title>FFmpeg-&ffmpeg-version;</title>
25
26 <indexterm zone="ffmpeg">
27 <primary sortas="a-FFmpeg">FFmpeg</primary>
28 </indexterm>
29
30 <sect2 role="package">
31 <title>Introduction to FFmpeg</title>
32
33 <para>
34 <application>FFmpeg</application> is a solution to record, convert and
35 stream audio and video. It is a very fast video and audio converter and it
36 can also acquire from a live audio/video source. Designed to be intuitive,
37 the command-line interface (<command>ffmpeg</command>) tries to figure out
38 all the parameters, when possible. <application>FFmpeg</application> can
39 also convert from any sample rate to any other, and resize video on the
40 fly with a high quality polyphase filter.
41 <application>FFmpeg</application> can use a Video4Linux compatible video
42 source and any Open Sound System audio source.
43 </para>
44
45 &lfs72_checked;
46
47 <bridgehead renderas="sect3">Package Information</bridgehead>
48 <itemizedlist spacing="compact">
49 <listitem>
50 <para>Download (HTTP): <ulink url="&ffmpeg-download-http;"/></para>
51 </listitem>
52 <listitem>
53 <para>Download (FTP): <ulink url="&ffmpeg-download-ftp;"/></para>
54 </listitem>
55 <listitem>
56 <para>Download MD5 sum: &ffmpeg-md5sum;</para>
57 </listitem>
58 <listitem>
59 <para>Download size: &ffmpeg-size;</para>
60 </listitem>
61 <listitem>
62 <para>Estimated disk space required: &ffmpeg-buildsize;</para>
63 </listitem>
64 <listitem>
65 <para>Estimated build time: &ffmpeg-time;</para>
66 </listitem>
67 </itemizedlist>
68
69 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
70
71 <!-- All dependencies are listed in the order as they are displayed in
72 the configure script. This makes it easy for readers (and editors)
73 to match up the dependency list with what is required or desired. -->
74
75 <bridgehead renderas="sect4">Recommended</bridgehead>
76 <para role="recommended">
77 <xref linkend="faac"/>,
78 <xref linkend="freetype2"/>,
79 <xref linkend="lame"/>,
80 <xref linkend="openjpeg"/>,
81 <xref linkend="pulseaudio"/>,
82 <xref linkend="speex"/>,
83 <xref linkend="libtheora"/>,
84 <xref linkend="libvorbis"/>,
85 <xref linkend="libvpx"/>,
86 <xref linkend="xvid"/>,
87 <xref linkend="openssl"/>,
88 <xref linkend="sdl"/>,
89 <xref linkend="xorg7-lib"/>,
90 <xref linkend="yasm"/>
91 </para>
92
93 <bridgehead renderas="sect4">Optional</bridgehead>
94 <para role="optional">
95 <xref linkend="fontconfig"/>,
96 <ulink url="http://www.piksel.org/frei0r">frei0r</ulink>,
97 <xref linkend="gnutls"/>,
98 <ulink url="http://tipok.org.ua/node/17">libaacplus</ulink>,
99 <ulink url="http://code.google.com/p/libass/">libass</ulink>,
100 <ulink url="http://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
101 <ulink url="http://caca.zoy.org/">libcaca</ulink>,
102 <ulink url="http://www.celt-codec.org/">libcelt</ulink>,
103 <ulink url="http://ftp.gnu.org/pub/gnu/libcdio/">libcdio</ulink>,
104 <ulink url="http://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
105 <ulink url="http://sourceforge.net/projects/opencore-amr/files/fdk-aac/">fdk-aac</ulink>,
106 <ulink url="http://www.speech.cs.cmu.edu/flite/">Flite</ulink>,
107 <ulink url="http://libgsm.sourcearchive.com/">GSM</ulink>,
108 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
109 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
110 <ulink url="http://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
111 <ulink url="http://svn.mplayerhq.hu/nut/src/trunk/">libnut</ulink> (SVN checkout),
112 <ulink url="http://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
113 <ulink url="http://opencv.org/">OpenCV</ulink>,
114 <ulink url="http://www.opus-codec.org/">Opus</ulink>,
115 <ulink url="http://sourceforge.net/projects/librtmp">librtmp</ulink>,
116 <ulink url="http://diracvideo.org/">libschroedinger</ulink>,
117 <ulink url="http://www.twolame.org/">TwoLAME</ulink>,
118 <ulink url="http://linuxtv.org/downloads/v4l-utils/">Video4Linux</ulink>,
119 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
120 <ulink url="http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>,
121 <ulink url="http://www.videolan.org/developers/x264.html">x264</ulink>,
122 <ulink url="http://xavs.sourceforge.net/">libxavs</ulink> (SVN checkout),
123 <ulink url="http://connect.creativelabs.com/openal/default.aspx">OpenAL</ulink>, and
124 <!-- <ulink url="http://medialibrary.sourceforge.net/">MediaLibrary</ulink>, -->
125 <ulink url="http://www.nongnu.org/texi2html">texi2html</ulink>
126 (to build HTML documentation)</para>
127
128 <bridgehead renderas="sect4">Optional (For Hardware Video Decoding)</bridgehead>
129 <para role="optional">
130 <ulink url="http://www.freedesktop.org/wiki/Software/vaapi">VA-API (libva)</ulink>
131 with corresponding drivers, including:
132 <ulink url="http://cgit.freedesktop.org/vaapi/intel-driver/">
133 Intel Driver (i965 chipsets only)</ulink>,
134 <ulink url="http://www.splitted-desktop.com/static/libva/xvba-video/">
135 XVBA Driver for Radeon Cards</ulink>, and
136 <ulink url="http://cgit.freedesktop.org/vaapi/vdpau-driver/">
137 VDPAU Driver for NVidia Cards</ulink>
138 (requires <ulink url="http://cgit.freedesktop.org/~aplattner/libvdpau/">
139 libvdpau</ulink>)
140 </para>
141
142 <para condition="html" role="usernotes">
143 User Notes: <ulink url="&blfs-wiki;/ffmpeg"/>
144 </para>
145 </sect2>
146
147 <sect2 role="installation">
148 <title>Installation of FFmpeg</title>
149
150 <para>
151 If <application>Xorg</application> is installed in a prefix other
152 than <filename class='directory'>/usr</filename>, the build will fail. Fix
153 this by issuing the following command:
154 </para>
155
156<screen><userinput>export LIBRARY_PATH=$XORG_PREFIX/lib</userinput></screen>
157
158 <para>
159 Install <application>FFmpeg</application> by running the following
160 commands:
161 </para>
162
163 <!-- The confiure optinos are listed in the order as they are displayed in
164 the configure script. This makes it easy for readers (and editors)
165 to match up the options with what is required or desired. -->
166
167<screen><userinput>sed -i 's/-lflite"/-lflite -lasound"/' configure &amp;&amp;
168./configure --prefix=/usr \
169 --enable-gpl \
170 --enable-version3 \
171 --enable-nonfree \
172 --disable-static \
173 --enable-shared \
174 --enable-x11grab \
175 --enable-libfaac \
176 --enable-libfreetype \
177 --enable-libmp3lame \
178 --enable-libopenjpeg \
179 --enable-libpulse \
180 --enable-libspeex \
181 --enable-libtheora \
182 --enable-libvorbis \
183 --enable-libvpx \
184 --enable-libxvid \
185 --enable-openssl \
186 --disable-debug &amp;&amp;
187make &amp;&amp;
188gcc tools/qt-faststart.c -o tools/qt-faststart &amp;&amp;
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 &amp;&amp;
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 300 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://ffmpeg.org/fate.html">
222 FFmpeg Automated Testing Environment</ulink>. Note that the BLFS team has
223 not performed this regression testing.
224 </para>
225
226 <para>
227 Now, as the <systemitem class="username">root</systemitem> user:
228 </para>
229
230<screen role="root"><userinput>make install &amp;&amp;
231install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
232install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
233install -v -m644 doc/*.txt \
234 /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
235
236 <para>
237 If HTML documentation was built, issue the following command to install it:
238 </para>
239
240<screen role="root"><userinput>install -v -m644 doc/*.html \
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;
250install -v -m644 doc/doxy/html/* \
251 /usr/share/doc/ffmpeg-&ffmpeg-version;/api</userinput></screen>
252 </sect2>
253
254 <sect2 role="commands">
255 <title>Command Explanations</title>
256
257 <para>
258 <command>sed -i ...</command>: This command adds the
259 <application>ALSA</application> library to the
260 <application>Flite</application> <envar>LDFLAGS</envar> variable and
261 enables the discovery of <application>Flite</application>.
262 </para>
263
264 <para>
265 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>:
266 This builds the <command>qt-faststart</command> program which can
267 modify QuickTime formatted movies
268 (<filename class="extension">.mov</filename> or
269 <filename class="extension">.mp4</filename>) so that the header information
270 is located at the beginning of the file instead of the end. This allows
271 the movie file to begin playing before the entire file has been downloaded.
272 </para>
273
274 <para>
275 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
276 permits support for postprocessing, swscale and many other features.
277 </para>
278
279 <para>
280 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
281 version 3 code.
282 </para>
283
284 <para>
285 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree
286 code. Note that the resulting libraries and binaries will be
287 unredistributable.
288 </para>
289
290 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
291 href="../../xincludes/static-libraries.xml"/>
292
293 <para>
294 <parameter>--enable-shared</parameter>: Enables building shared libraries,
295 otherwise only static libraries are built and installed.
296 </para>
297
298 <para>
299 <parameter>--enable-x11grab</parameter>: Enables X11 grabbing.
300 </para>
301
302 <para>
303 <parameter>--enable-libfaac</parameter>: Enables AAC encoding via
304 <filename class="libraryfile">libfaac</filename>.
305 </para>
306
307 <para>
308 <parameter>--enable-libfreetype</parameter>: Enables the use of
309 <filename class="libraryfile">libfreetype</filename>.
310 </para>
311
312 <para>
313 <parameter>--enable-libmp3lame</parameter>: Enables MP3 encoding via
314 <filename class="libraryfile">libmp3lame</filename>.
315 </para>
316
317 <para>
318 <parameter>--enable-libopenjpeg</parameter>: Enables JPEG 2000 de/encoding
319 via <filename class="libraryfile">libopenjpeg</filename>.
320 </para>
321
322 <para>
323 <parameter>--enable-libpulse</parameter>: Enables
324 <application>Pulseaudio</application> input via
325 <filename class="libraryfile">libpulse</filename>.
326 </para>
327
328 <para>
329 <parameter>--enable-libspeex</parameter>: Enables
330 <application>Speex</application> de/encoding
331 via <filename class="libraryfile">libspeex</filename>.
332 </para>
333
334 <para>
335 <parameter>--enable-libtheora</parameter>: Enables
336 <application>Theora</application> encoding
337 via <filename class="libraryfile">libtheora</filename>.
338 </para>
339
340 <para>
341 <parameter>--enable-libvorbis</parameter>: Enables
342 <application>Vorbis</application> de/encoding
343 via <filename class="libraryfile">libvorbis</filename>.
344 </para>
345
346 <para>
347 <parameter>--enable-libvpx</parameter>: Enables VP8 de/encoding
348 via <filename class="libraryfile">libvpx</filename>.
349 </para>
350
351 <para>
352 <parameter>--enable-libxvid</parameter>: Enables
353 <application>Xvid</application> encoding
354 via <filename class="libraryfile">libxvidcore</filename>.
355 </para>
356
357 <para>
358 <parameter>--enable-openssl</parameter>: Enables
359 <application>OpenSSL</application> cryptography.
360 </para>
361
362 <para>
363 <parameter>--disable-debug</parameter>: Disables building debugging
364 symbols into the programs and libraries.
365 </para>
366
367 <para>
368 <option>--enable-<replaceable>&lt;codec&gt;</replaceable></option>:
369 <application>FFmpeg</application> comes with code to compile decoders for
370 almost every codec you could think of. The only reason to enable a
371 specific codec (and make <application>FFmpeg</application> link to the
372 prerequisite shared library installed on your system) is to make
373 <application>FFmpeg</application> compile an <emphasis>encoder</emphasis>
374 for that codec. <application>FFmpeg</application> provides an excellent
375 collection of decoders. If you just want to use
376 <application>FFmpeg</application> to watch video or listen to music (via
377 other applications such as <application>Gstreamer</application> or
378 <application>Xine</application>) then you will not benefit from linking
379 <application>FFmpeg</application> to other codec libraries.
380 </para>
381
382 </sect2>
383
384 <sect2 role="configuration">
385 <title>Configuring FFmpeg</title>
386
387 <sect3 id="ffmpeg-config">
388 <title>Config Files</title>
389
390 <para><filename>/etc/ffserver.conf</filename> and
391 <filename>~/.ffmpeg/ffserver-config</filename></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 </sect3>
407 </sect2>
408
409 <sect2 role="content">
410 <title>Contents</title>
411
412 <segmentedlist>
413 <segtitle>Installed Programs</segtitle>
414 <segtitle>Installed Libraries</segtitle>
415 <segtitle>Installed Directories</segtitle>
416
417 <seglistitem>
418 <seg>
419 ffmpeg,
420 ffplay,
421 ffprobe,
422 ffserver and
423 qt-faststart
424 </seg>
425 <seg>
426 libavcodec.so,
427 libavdevice.so,
428 libavfilter.so,
429 libavformat.so,
430 libavutil.so,
431 libpostproc.so,
432 libswresample and
433 libswscale.so
434 </seg>
435 <seg>
436 /usr/include/libavcodec,
437 /usr/include/libavdevice,
438 /usr/include/libavfilter,
439 /usr/include/libavformat,
440 /usr/include/libavutil,
441 /usr/include/libpostproc,
442 /usr/include/libswresample
443 /usr/include/libswscale,
444 /usr/share/ffmpeg and
445 /usr/share/doc/ffmpeg-&ffmpeg-version;
446 </seg>
447 </seglistitem>
448 </segmentedlist>
449
450 <variablelist>
451 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
452 <?dbfo list-presentation="list"?>
453 <?dbhtml list-presentation="table"?>
454
455 <varlistentry id="ffmpeg-prog">
456 <term><command>ffmpeg</command></term>
457 <listitem>
458 <para>
459 is a command-line tool to convert video files, network streams and
460 input from a TV card to several video formats.
461 </para>
462 <indexterm zone="ffmpeg ffmpeg-prog">
463 <primary sortas="b-ffmpeg">ffmpeg</primary>
464 </indexterm>
465 </listitem>
466 </varlistentry>
467
468 <varlistentry id="ffplay">
469 <term><command>ffplay</command></term>
470 <listitem>
471 <para>
472 is a very simple and portable media player using the
473 <filename>ffmpeg</filename> libraries and the SDL library.
474 </para>
475 <indexterm zone="ffmpeg ffplay">
476 <primary sortas="b-ffplay">ffplay</primary>
477 </indexterm>
478 </listitem>
479 </varlistentry>
480
481 <varlistentry id="ffprobe">
482 <term><command>ffprobe</command></term>
483 <listitem>
484 <para>
485 gathers information from multimedia streams and prints it in a human
486 and machine-readable fashion.
487 </para>
488 <indexterm zone="ffmpeg ffprobe">
489 <primary sortas="b-ffprobe">ffprobe</primary>
490 </indexterm>
491 </listitem>
492 </varlistentry>
493
494 <varlistentry id="ffserver">
495 <term><command>ffserver</command></term>
496 <listitem>
497 <para>
498 is a streaming server for everything that <command>ffmpeg</command>
499 could use as input (files, streams, TV card input, webcam, etc).
500 </para>
501 <indexterm zone="ffmpeg ffserver">
502 <primary sortas="b-ffserver">ffserver</primary>
503 </indexterm>
504 </listitem>
505 </varlistentry>
506
507 <varlistentry id="qt-faststart">
508 <term><command>qt-faststart</command></term>
509 <listitem>
510 <para>
511 moves the index file to the front of quicktime (mov/mp4) videos.
512 </para>
513 <indexterm zone="ffmpeg qt-faststart">
514 <primary sortas="b-qt-faststart">qt-faststart</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="libavcodec">
520 <term><filename class="libraryfile">libavcodec.so</filename></term>
521 <listitem>
522 <para>
523 is a library containing the <application>FFmpeg</application> codecs
524 (both encoding and decoding).
525 </para>
526 <indexterm zone="ffmpeg libavcodec">
527 <primary sortas="c-libavcodec">libavcodec.so</primary>
528 </indexterm>
529 </listitem>
530 </varlistentry>
531
532 <varlistentry id="libavdevice">
533 <term><filename class="libraryfile">libavdevice.so</filename></term>
534 <listitem>
535 <para>
536 is the <application>FFmpeg</application> device handling library.
537 </para>
538 <indexterm zone="ffmpeg libavdevice">
539 <primary sortas="c-libavdevice">libavdevice.so</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="libavfilter">
545 <term><filename class="libraryfile">libavfilter.so</filename></term>
546 <listitem>
547 <para>
548 is a library of filters that can alter video or audio between the
549 decoder and the encoder (or output).
550 </para>
551 <indexterm zone="ffmpeg libavfilter">
552 <primary sortas="c-libavfilter">libavfilter.so</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="libavformat">
558 <term><filename class="libraryfile">libavformat.so</filename></term>
559 <listitem>
560 <para>
561 is a library containing the file formats handling (mux and demux
562 code for several formats) used by <command>ffplay</command> as well
563 as allowing the generation of audio or video streams.
564 </para>
565 <indexterm zone="ffmpeg libavformat">
566 <primary sortas="c-libavformat">libavformat.so</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="libavutil">
572 <term><filename class="libraryfile">libavutil.so</filename></term>
573 <listitem>
574 <para>is the <application>FFmpeg</application> utility library.</para>
575 <indexterm zone="ffmpeg libavutil">
576 <primary sortas="c-libavutil">libavutil.so</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="libpostproc">
582 <term><filename class="libraryfile">libpostproc.so</filename></term>
583 <listitem>
584 <para>
585 is the <application>FFmpeg</application> post processing library.
586 </para>
587 <indexterm zone="ffmpeg libpostproc">
588 <primary sortas="c-libpostproc">libpostproc.so</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="libswresample">
594 <term><filename class="libraryfile">libswresample.so</filename></term>
595 <listitem>
596 <para>
597 is the <application>FFmpeg</application> audio rescaling library,
598 it contains functions for converting audio sample formats.
599 </para>
600 <indexterm zone="ffmpeg libswresample">
601 <primary sortas="c-libswresample">libswresample.so</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="libswscale">
607 <term><filename class="libraryfile">libswscale.so</filename></term>
608 <listitem>
609 <para>
610 is the <application>FFmpeg</application> image rescaling library.
611 </para>
612 <indexterm zone="ffmpeg libswscale">
613 <primary sortas="c-libswscale">libswscale.so</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617 </variablelist>
618 </sect2>
619</sect1>
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