source: multimedia/videoutils/ffmpeg.xml@ fb778f6

12.1 ken/TL2024 ken/tuningfonts lazarus plabs/newcss python3.11 rahul/power-profiles-daemon renodr/vulkan-addition trunk xry111/llvm18
Last change on this file since fb778f6 was fb778f6, checked in by Rahul Chandra <rahulshaku2@…>, 6 months ago

Update to ffmpeg-6.1

  • Property mode set to 100644
File size: 23.4 KB
Line 
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 "https://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.xz">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "5898f671dca522f537c3b57d1d6b57a3">
10 <!ENTITY ffmpeg-size "10 MB">
11 <!ENTITY ffmpeg-buildsize "239 MB (add 1.5 GB for the FATE suite/tests, add 792 MB for documentation)">
12 <!ENTITY ffmpeg-time "1.3 SBU (using parallelism=4; add 3.2 SBU (with THREADS=4) to run the FATE suite after sample files are downloaded; add 0.3 SBU for doxygen docs)">
13]>
14
15<sect1 id="ffmpeg" xreflabel="FFmpeg-&ffmpeg-version;">
16 <?dbhtml filename="ffmpeg.html"?>
17
18
19 <title>FFmpeg-&ffmpeg-version;</title>
20
21 <indexterm zone="ffmpeg">
22 <primary sortas="a-FFmpeg">FFmpeg</primary>
23 </indexterm>
24
25 <sect2 role="package">
26 <title>Introduction to FFmpeg</title>
27
28 <para>
29 <application>FFmpeg</application> is a solution to record, convert and
30 stream audio and video. It is a very fast video and audio converter and it
31 can also acquire from a live audio/video source. Designed to be intuitive,
32 the command-line interface (<command>ffmpeg</command>) tries to figure out
33 all the parameters, when possible. <application>FFmpeg</application> can
34 also convert from any sample rate to any other, and resize video on the
35 fly with a high quality polyphase filter.
36 <application>FFmpeg</application> can use a Video4Linux compatible video
37 source and any Open Sound System audio source.
38 </para>
39
40 &lfs120_checked;
41
42 <bridgehead renderas="sect3">Package Information</bridgehead>
43 <itemizedlist spacing="compact">
44 <listitem>
45 <para>
46 Download (HTTP): <ulink url="&ffmpeg-download-http;"/>
47 </para>
48 </listitem>
49 <listitem>
50 <para>
51 Download (FTP): <ulink url="&ffmpeg-download-ftp;"/>
52 </para>
53 </listitem>
54 <listitem>
55 <para>
56 Download MD5 sum: &ffmpeg-md5sum;
57 </para>
58 </listitem>
59 <listitem>
60 <para>
61 Download size: &ffmpeg-size;
62 </para>
63 </listitem>
64 <listitem>
65 <para>
66 Estimated disk space required: &ffmpeg-buildsize;
67 </para>
68 </listitem>
69 <listitem>
70 <para>
71 Estimated build time: &ffmpeg-time;
72 </para>
73 </listitem>
74 </itemizedlist>
75
76 <bridgehead renderas="sect3">Additional Downloads</bridgehead>
77 <itemizedlist spacing="compact">
78 <listitem>
79 <para>
80 Required patch:
81 <ulink url="&patch-root;/ffmpeg-&ffmpeg-version;-chromium_method-1.patch"/>
82 </para>
83 </listitem>
84 </itemizedlist>
85
86 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
87
88 <bridgehead renderas="sect4">Recommended</bridgehead>
89 <para role="recommended">
90 <xref linkend="libaom"/>,
91 <xref linkend="libass"/>,
92 <xref linkend="fdk-aac"/>,
93 <xref linkend="freetype2"/>,
94 <xref linkend="lame"/>,
95 <xref linkend="libtheora"/>,
96 <xref linkend="libvorbis"/>,
97 <xref linkend="libvpx"/>,
98 <xref linkend="opus"/>,
99 <xref linkend="x264"/>,
100 <xref linkend="x265"/>, and
101 <xref linkend="nasm"/> or <xref linkend="yasm"/>
102 </para>
103
104 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
105 <para role="recommended">
106 <xref linkend="alsa-lib"/>,
107 <xref linkend="libva"/>,
108 <xref linkend="libvdpau"/> (with the corresponding driver package), and
109 <xref linkend="sdl2"/>
110 </para>
111
112 <bridgehead renderas="sect4">Optional</bridgehead>
113 <para role="optional">
114 <xref linkend="doxygen"/>,
115 <xref linkend="fontconfig"/>,
116 <xref linkend="fribidi"/>,
117 <xref linkend="frei0r"/>,
118 <xref linkend="libcdio"/> (to identify and play CDs),
119 <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
120 <xref linkend="libwebp"/>,
121 <xref linkend="opencv"/>,
122 <xref linkend="openjpeg2"/>,
123 <xref linkend="gnutls"/>,
124 <xref linkend="pulseaudio"/>,
125 <xref linkend="samba"/>,
126 <xref linkend="speex"/>,
127 <xref linkend="texlive"/>
128 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
129 <xref linkend="v4l-utils"/>,
130 <xref linkend="xvid"/>,
131 <xref linkend="x-window-system"/>,
132 <ulink url="https://github.com/festvox/flite">Flite</ulink>,
133 <ulink url="https://www.quut.com/gsm/">GSM</ulink>,
134 <ulink url="https://tipok.org.ua/node/17">libaacplus</ulink>,
135 <ulink url="https://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
136 <ulink url="https://github.com/cacalabs/libcaca">libcaca</ulink>,
137 <ulink url="https://gitlab.xiph.org/xiph/celt">libcelt</ulink>,
138 <ulink url="https://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
139 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
140 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
141 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
142 <ulink url="https://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
143 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
144 <ulink url="https://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
145 <ulink url="https://www.libssh.org/">libssh</ulink>,
146 <ulink url="https://openal.org/">OpenAL</ulink>,
147 <ulink url="https://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
148 <ulink url="https://github.com/Haivision/srt">Srt</ulink>,
149 <ulink url="https://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
150 <ulink url="https://www.twolame.org/">TwoLAME</ulink>,
151 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
152 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
153 <ulink url="https://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
154 </para>
155
156 </sect2>
157
158 <sect2 role="installation">
159 <title>Installation of FFmpeg</title>
160
161 <para>
162 First, apply a patch that adds an API necessary for some packages to
163 build:
164 <!-- qtwebengine -->
165 </para>
166
167<screen><userinput remap="pre">patch -Np1 -i ../ffmpeg-&ffmpeg-version;-chromium_method-1.patch</userinput></screen>
168
169 <para>
170 Install <application>FFmpeg</application> by running the following
171 commands:
172 </para>
173
174<screen><userinput>./configure --prefix=/usr \
175 --enable-gpl \
176 --enable-version3 \
177 --enable-nonfree \
178 --disable-static \
179 --enable-shared \
180 --disable-debug \
181 --enable-libaom \
182 --enable-libass \
183 --enable-libfdk-aac \
184 --enable-libfreetype \
185 --enable-libmp3lame \
186 --enable-libopus \
187 --enable-libtheora \
188 --enable-libvorbis \
189 --enable-libvpx \
190 --enable-libx264 \
191 --enable-libx265 \
192 --enable-openssl \
193 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
194
195make &amp;&amp;
196
197gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
198
199 <para>
200 HTML documentation was built in the previous step. If you have
201 <xref linkend="texlive"/> installed and wish to build PDF and
202 Postscript versions of the documentation, issue the following commands:
203 </para>
204
205<screen remap="doc"><userinput>pushd doc &amp;&amp;
206for DOCNAME in `basename -s .html *.html`
207do
208 texi2pdf -b $DOCNAME.texi &amp;&amp;
209 texi2dvi -b $DOCNAME.texi &amp;&amp;
210
211 dvips -o $DOCNAME.ps \
212 $DOCNAME.dvi
213done &amp;&amp;
214popd &amp;&amp;
215unset DOCNAME</userinput></screen>
216
217 <para>
218 If you have <xref linkend="doxygen"/> installed
219 and you wish to build (if --disable-doc was
220 used) or rebuild the html documentation, issue:
221 </para>
222
223<screen remap="doc"><userinput>doxygen doc/Doxyfile</userinput></screen>
224
225 <para>
226 The fate-suite tests include comparisons with installed files, and should
227 not be run before the package is installed. Therefore, if you desire to
228 run them, instructions are given further below.
229 </para>
230
231 <para>
232 Now, as the <systemitem class="username">root</systemitem> user:
233 </para>
234
235<screen role="root"><userinput>make install &amp;&amp;
236
237install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
238install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
239install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
240
241 <para>
242 If the PDF and Postscript documentation was built, issue the following
243 commands, as the <systemitem class="username">root</systemitem> user, to
244 install them:
245 </para>
246
247<screen role="root"
248 remap="doc"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
249install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
250
251 <para>
252 If you used <command>doxygen</command> to manually create the API
253 documentation, install it by issuing the following commands
254 as the <systemitem class="username">root</systemitem> user:
255 </para>
256
257<screen role="root"
258 remap="doc"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
259cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
260find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
261find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
262
263 <para>
264 To properly test the installation you must have <xref linkend="rsync"/>
265 installed and follow the instructions for the <ulink
266 url="https://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
267 Environment</ulink> (FATE). First, about 1 GB of sample files used to
268 run FATE are downloaded with the command:
269 </para>
270
271<screen remap="test"><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
272
273 <para>
274 The <filename class="directory">fate-suite</filename> directory is
275 created and the files are downloaded there. That command actually runs an
276 rsync command to obtain the sample files. You may want to compress and
277 keep this directory for testing again, for testing in another system,
278 or for when a new version of ffmpeg is released. Then, unpack the sample
279 files in the source directory, and run the <command>make fate-rsync
280 ...</command> command above to sync with the upstream repository. The
281 download size and time are drastically reduced by doing this. Estimated
282 values in "Package Information" do not include the download SBU. Some
283 samples may have been removed in newer versions, so in order to be sure
284 local and server fate samples are identical when you use previously
285 saved samples, run the following command:
286 </para>
287
288<screen role="nodump"><userinput>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
289 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</userinput></screen>
290
291 <para>
292 Next, execute FATE with the following commands (there are more than 3800
293 tests in the suite):
294 </para>
295
296<screen remap="test"><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
297grep ^TEST ../fate.log | wc -l</userinput></screen>
298
299 <para>
300 where <replaceable>N</replaceable> is an integer,
301 <replaceable>N</replaceable> &le; number of cores in the system.
302 </para>
303
304 <para>
305 A successful run should return no errors or warnings, just a list of tests
306 and total amount at the end.
307 </para>
308
309 </sect2>
310
311 <sect2 role="commands">
312 <title>Command Explanations</title>
313
314 <para>
315 <command>sed -i ... configure</command>: This command adds the
316 <application>ALSA</application> library to the
317 <application>Flite</application> <envar>LDFLAGS</envar> variable and
318 enables the discovery of <application>Flite</application>.
319 </para>
320
321 <para>
322 <command>find ... ;</command>: Fixes permissions of documentation files
323 and directories.
324 </para>
325
326 <para>
327 <parameter>--enable-libfreetype</parameter>: Enables
328 <application>Freetype</application> support.
329 </para>
330
331 <para>
332 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
333 permits support for postprocessing, swscale and many other features.
334 </para>
335
336 <para>
337 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
338 version 3 code.
339 </para>
340
341 <para>
342 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
343 Note that the resulting libraries and binaries will be unredistributable.
344 </para>
345
346 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
347 href="../../xincludes/static-libraries.xml"/>
348
349 <para>
350 <parameter>--enable-shared</parameter>: Enables building shared
351 libraries, otherwise only static libraries are built and installed.
352 </para>
353
354 <para>
355 <parameter>--disable-debug</parameter>: Disables building debugging
356 symbols into the programs and libraries.
357 </para>
358
359 <para>
360 <parameter>--enable-libaom</parameter>: Enables AV1 audio and video
361 decoding via <filename class="libraryfile">libaom</filename>.
362 </para>
363
364 <para>
365 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
366 rendering via <filename class="libraryfile">libass</filename>.
367 </para>
368
369 <para>
370 <option>--enable-libdrm</option>: Use this switch if
371 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
372 input module which is useful for screen capturing or streaming.
373 </para>
374
375 <para>
376 <parameter>--enable-libfdk-aac</parameter>: Enables AAC audio encoding via
377 <filename class="libraryfile">libfdk-aac</filename>.
378 </para>
379
380 <para>
381 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
382 via <filename class="libraryfile">libmp3lame</filename>.
383 </para>
384
385 <para>
386 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
387 Theora video encoding via <filename
388 class="libraryfile">libvorbis</filename> and <filename
389 class="libraryfile">libtheora</filename>.
390 </para>
391
392 <para>
393 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
394 encoding via <filename class="libraryfile">libvorbis</filename> and
395 <filename class="libraryfile">libvpx</filename>.
396 </para>
397
398 <para>
399 <parameter>--enable-libx264</parameter>: Enables high-quality
400 H.264/MPEG-4 AVC encoding via <filename
401 class="libraryfile">libx264</filename>.
402 </para>
403
404 <para>
405 <parameter>--enable-libx265</parameter>: Enables high-quality
406 H.265/HEVC encoding via <filename
407 class="libraryfile">libx265</filename>.
408 </para>
409
410 <para>
411 <parameter>--enable-openssl</parameter>:
412 Enables HTTPS protocol for network streams.
413 </para>
414
415 <para>
416 <option>--enable-gnutls</option>: Use this option instead of
417 <parameter>--enable-openssl</parameter>, if you want to use
418 <application>GnuTLS</application> instead of
419 <application>OpenSSL</application> for HTTPS protocol.
420 </para>
421
422 <para>
423 <option>--disable-doc</option>: Disables building html documentation.
424 This is only needed if <xref linkend="doxygen"/> is installed and you
425 do not want to build the html documentation.
426 </para>
427
428 <para>
429 <option>--enable-libpulse</option>: Enables support for
430 <application>Pulseaudio</application> for audio output.
431 </para>
432
433 <para>
434 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
435 builds the <command>qt-faststart</command> program which can modify
436 QuickTime formatted movies (<filename class="extension">.mov</filename>
437 or <filename class="extension">.mp4</filename>) so that the header
438 information is located at the beginning of the file instead of the end.
439 This allows the movie file to begin playing before the entire file has
440 been downloaded.
441 </para>
442
443 <note>
444 <para>
445 Support for most of the dependency packages requires using options
446 passed to the <command>configure</command> script. View the output
447 from <command>./configure --help</command> for complete information
448 about enabling dependency packages.
449 </para>
450 </note>
451
452 </sect2>
453
454 <sect2 role="content">
455 <title>Contents</title>
456
457 <segmentedlist>
458 <segtitle>Installed Programs</segtitle>
459 <segtitle>Installed Libraries</segtitle>
460 <segtitle>Installed Directories</segtitle>
461
462 <seglistitem>
463 <seg>
464 ffmpeg, ffplay, ffprobe, <!--ffserver,--> and qt-faststart
465 </seg>
466 <seg>
467 libavcodec.so, libavdevice.so, libavfilter.so,
468 libavformat.so, libavutil.so, libpostproc.so,
469 libswresample.so, and libswscale.so
470 </seg>
471 <seg>
472 /usr/include/libav{codec,device,filter,format,util},
473 /usr/include/libpostproc,
474 /usr/include/libsw{resample,scale},
475 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
476 /usr/share/ffmpeg
477 </seg>
478 </seglistitem>
479 </segmentedlist>
480
481 <variablelist>
482 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
483 <?dbfo list-presentation="list"?>
484 <?dbhtml list-presentation="table"?>
485
486 <varlistentry id="ffmpeg-prog">
487 <term><command>ffmpeg</command></term>
488 <listitem>
489 <para>
490 is a command-line tool to convert video files, network streams and
491 input from a TV card to several video formats
492 </para>
493 <indexterm zone="ffmpeg ffmpeg-prog">
494 <primary sortas="b-ffmpeg">ffmpeg</primary>
495 </indexterm>
496 </listitem>
497 </varlistentry>
498
499 <varlistentry id="ffplay">
500 <term><command>ffplay</command></term>
501 <listitem>
502 <para>
503 is a very simple and portable media player using the
504 <filename>ffmpeg</filename> libraries and the SDL library
505 </para>
506 <indexterm zone="ffmpeg ffplay">
507 <primary sortas="b-ffplay">ffplay</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
512 <varlistentry id="ffprobe">
513 <term><command>ffprobe</command></term>
514 <listitem>
515 <para>
516 gathers information from multimedia streams and prints it in a human
517 and machine-readable fashion
518 </para>
519 <indexterm zone="ffmpeg ffprobe">
520 <primary sortas="b-ffprobe">ffprobe</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="qt-faststart">
526 <term><command>qt-faststart</command></term>
527 <listitem>
528 <para>
529 moves the index file to the front of quicktime (mov/mp4) videos
530 </para>
531 <indexterm zone="ffmpeg qt-faststart">
532 <primary sortas="b-qt-faststart">qt-faststart</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="libavcodec">
538 <term><filename class="libraryfile">libavcodec.so</filename></term>
539 <listitem>
540 <para>
541 is a library containing the <application>FFmpeg</application> codecs
542 (both encoding and decoding)
543 </para>
544 <indexterm zone="ffmpeg libavcodec">
545 <primary sortas="c-libavcodec">libavcodec.so</primary>
546 </indexterm>
547 </listitem>
548 </varlistentry>
549
550 <varlistentry id="libavdevice">
551 <term><filename class="libraryfile">libavdevice.so</filename></term>
552 <listitem>
553 <para>
554 is the <application>FFmpeg</application> device handling library
555 </para>
556 <indexterm zone="ffmpeg libavdevice">
557 <primary sortas="c-libavdevice">libavdevice.so</primary>
558 </indexterm>
559 </listitem>
560 </varlistentry>
561
562 <varlistentry id="libavfilter">
563 <term><filename class="libraryfile">libavfilter.so</filename></term>
564 <listitem>
565 <para>
566 is a library of filters that can alter video or audio between the
567 decoder and the encoder (or output)
568 </para>
569 <indexterm zone="ffmpeg libavfilter">
570 <primary sortas="c-libavfilter">libavfilter.so</primary>
571 </indexterm>
572 </listitem>
573 </varlistentry>
574
575 <varlistentry id="libavformat">
576 <term><filename class="libraryfile">libavformat.so</filename></term>
577 <listitem>
578 <para>
579 is a library containing the file formats handling (mux and demux
580 code for several formats) used by <command>ffplay</command> as well
581 as allowing the generation of audio or video streams
582 </para>
583 <indexterm zone="ffmpeg libavformat">
584 <primary sortas="c-libavformat">libavformat.so</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="libavresample">
590 <term><filename class="libraryfile">libavresample.so</filename></term>
591 <listitem>
592 <para>
593 is a library containing functions for resampling audio and video.
594 </para>
595 <indexterm zone="ffmpeg libavresample">
596 <primary sortas="c-libavresample">libavresample</primary>
597 </indexterm>
598 </listitem>
599 </varlistentry>
600
601 <varlistentry id="libavutil">
602 <term><filename class="libraryfile">libavutil.so</filename></term>
603 <listitem>
604 <para>
605 is the <application>FFmpeg</application> utility library
606 </para>
607 <indexterm zone="ffmpeg libavutil">
608 <primary sortas="c-libavutil">libavutil.so</primary>
609 </indexterm>
610 </listitem>
611 </varlistentry>
612
613 <varlistentry id="libpostproc">
614 <term><filename class="libraryfile">libpostproc.so</filename></term>
615 <listitem>
616 <para>
617 is the <application>FFmpeg</application> post processing library
618 </para>
619 <indexterm zone="ffmpeg libpostproc">
620 <primary sortas="c-libpostproc">libpostproc.so</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="libswresample">
626 <term><filename class="libraryfile">libswresample.so</filename></term>
627 <listitem>
628 <para>
629 is the <application>FFmpeg</application> audio rescaling library,
630 it contains functions for converting audio sample formats
631 </para>
632 <indexterm zone="ffmpeg libswresample">
633 <primary sortas="c-libswresample">libswresample.so</primary>
634 </indexterm>
635 </listitem>
636 </varlistentry>
637
638 <varlistentry id="libswscale">
639 <term><filename class="libraryfile">libswscale.so</filename></term>
640 <listitem>
641 <para>
642 is the <application>FFmpeg</application> image rescaling library
643 </para>
644 <indexterm zone="ffmpeg libswscale">
645 <primary sortas="c-libswscale">libswscale.so</primary>
646 </indexterm>
647 </listitem>
648 </varlistentry>
649
650 </variablelist>
651
652 </sect2>
653
654</sect1>
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