source: multimedia/videoutils/ffmpeg.xml@ 91b30845

gimp3 lazarus trunk xry111/for-12.3 xry111/spidermonkey128
Last change on this file since 91b30845 was 91b30845, checked in by Bruce Dubbs <bdubbs@…>, 3 months ago

Clarify dependencies for ffmpeg.

  • Property mode set to 100644
File size: 24.1 KB
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1<?xml version="1.0" encoding="UTF-8"?>
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 "81d5e65494f573ec28c9f56e99247815">
10 <!ENTITY ffmpeg-size "10 MB">
11 <!ENTITY ffmpeg-buildsize "201 MB (add 1.5 GB for the FATE suite/tests, add 792 MB for documentation)">
12 <!ENTITY ffmpeg-time "1.1 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 &lfs121_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="libvorbis"/>,
96 <xref linkend="libvpx"/>,
97 <xref linkend="opus"/>,
98 <xref linkend="x264"/>,
99 <xref linkend="x265"/>, and
100 <xref linkend="nasm"/> or <xref linkend="yasm"/>
101 </para>
102
103 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
104 <para role="recommended">
105 <xref linkend="alsa-lib"/>,
106 <xref linkend="libva"/>,
107 <xref linkend="sdl2"/>
108 </para>
109
110 <bridgehead renderas="sect4">Recommended for systems with Intel Video</bridgehead>
111 <para role="recommended">
112 <xref linkend="libvdpau"/> and
113 <xref linkend="libvdpau-va-gl"/>
114 </para>
115
116 <bridgehead renderas="sect4">Optional</bridgehead>
117 <para role="optional">
118 <xref linkend="doxygen"/>,
119 <xref linkend="fontconfig"/>,
120 <xref linkend="fribidi"/>,
121 <xref linkend="frei0r"/>,
122 <xref linkend="libcdio"/> (to identify and play CDs),
123 <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
124 <!--<xref linkend="libtheora"/>,-->
125 <xref linkend="libjxl"/>,
126 <xref linkend="libwebp"/>,
127 <xref linkend="opencv"/>,
128 <xref linkend="openjpeg2"/>,
129 <xref linkend="gnutls"/>,
130 <xref linkend="pulseaudio"/>,
131 <xref linkend="samba"/>,
132 <xref linkend="speex"/>,
133 <xref linkend="texlive"/>
134 (or <xref linkend="tl-installer"/>) for PDF and PS documentation,
135 <xref linkend="v4l-utils"/>,
136 <xref linkend="vulkan-loader"/>,
137 <xref linkend="xvid"/>,
138 <xref linkend="x-window-system"/>,
139 <ulink url="https://code.videolan.org/videolan/dav1d">dav1d</ulink>,
140 <ulink url="https://github.com/festvox/flite">Flite</ulink>,
141 <ulink url="https://www.quut.com/gsm/">GSM</ulink>,
142 <ulink url="https://tipok.org.ua/node/17">libaacplus</ulink>,
143 <ulink url="https://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
144 <ulink url="https://github.com/cacalabs/libcaca">libcaca</ulink>,
145 <ulink url="https://gitlab.xiph.org/xiph/celt">libcelt</ulink>,
146 <ulink url="https://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
147 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
148 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
149 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
150 <ulink url="https://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
151 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
152 <ulink url="https://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
153 <ulink url="https://www.libssh.org/">libssh</ulink>,
154 <ulink url="https://www.theora.org">libtheora</ulink>,
155 <ulink url="https://openal.org/">OpenAL</ulink>,
156 <ulink url="https://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
157 <ulink url="https://github.com/Haivision/srt">Srt</ulink>,
158 <ulink url="https://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
159 <ulink url="https://www.twolame.org/">TwoLAME</ulink>,
160 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
161 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
162 <!--<ulink url="https://vulkan.org/">Vulkan</ulink>, and-->
163 <ulink url="https://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
164 </para>
165
166 </sect2>
167
168 <sect2 role="installation">
169 <title>Installation of FFmpeg</title>
170
171 <para>
172 First, apply a patch that adds an API necessary for some packages to
173 build:
174 <!-- qtwebengine -->
175 </para>
176
177<screen><userinput remap="pre">patch -Np1 -i ../ffmpeg-&ffmpeg-version;-chromium_method-1.patch</userinput></screen>
178
179 <para>
180 Install <application>FFmpeg</application> by running the following
181 commands:
182 </para>
183
184<screen><userinput>./configure --prefix=/usr \
185 --enable-gpl \
186 --enable-version3 \
187 --enable-nonfree \
188 --disable-static \
189 --enable-shared \
190 --disable-debug \
191 --enable-libaom \
192 --enable-libass \
193 --enable-libfdk-aac \
194 --enable-libfreetype \
195 --enable-libmp3lame \
196 --enable-libopus \
197 --enable-libvorbis \
198 --enable-libvpx \
199 --enable-libx264 \
200 --enable-libx265 \
201 --enable-openssl \
202 --ignore-tests=enhanced-flv-av1 \
203 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
204
205make &amp;&amp;
206
207gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
208
209 <para>
210 HTML documentation was built in the previous step. If you have
211 <xref linkend="texlive"/> installed and wish to build PDF and
212 Postscript versions of the documentation, issue the following commands:
213 </para>
214
215<screen remap="doc"><userinput>pushd doc &amp;&amp;
216for DOCNAME in `basename -s .html *.html`
217do
218 texi2pdf -b $DOCNAME.texi &amp;&amp;
219 texi2dvi -b $DOCNAME.texi &amp;&amp;
220
221 dvips -o $DOCNAME.ps \
222 $DOCNAME.dvi
223done &amp;&amp;
224popd &amp;&amp;
225unset DOCNAME</userinput></screen>
226
227 <para>
228 If you have <xref linkend="doxygen"/> installed
229 and you wish to build (if --disable-doc was
230 used) or rebuild the html documentation, issue:
231 </para>
232
233<screen remap="doc"><userinput>doxygen doc/Doxyfile</userinput></screen>
234
235 <para>
236 The fate-suite tests include comparisons with installed files, and should
237 not be run before the package is installed. Therefore, if you desire to
238 run them, instructions are given further below.
239 </para>
240
241 <para>
242 Now, as the <systemitem class="username">root</systemitem> user:
243 </para>
244
245<screen role="root"><userinput>make install &amp;&amp;
246
247install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
248install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
249install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
250
251 <para>
252 If the PDF and Postscript documentation was built, issue the following
253 commands, as the <systemitem class="username">root</systemitem> user, to
254 install them:
255 </para>
256
257<screen role="root"
258 remap="doc"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
259install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
260
261 <para>
262 If you used <command>doxygen</command> to manually create the API
263 documentation, install it by issuing the following commands
264 as the <systemitem class="username">root</systemitem> user:
265 </para>
266
267<screen role="root"
268 remap="doc"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
269cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
270find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
271find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
272
273 <para>
274 To properly test the installation you must have <xref linkend="rsync"/>
275 installed and follow the instructions for the <ulink
276 url="https://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
277 Environment</ulink> (FATE). First, about 1 GB of sample files used to
278 run FATE are downloaded with the command:
279 </para>
280
281<screen remap="test"><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
282
283 <para>
284 The <filename class="directory">fate-suite</filename> directory is
285 created and the files are downloaded there. That command actually runs an
286 rsync command to obtain the sample files. You may want to compress and
287 keep this directory for testing again, for testing in another system,
288 or for when a new version of ffmpeg is released. Then, unpack the sample
289 files in the source directory, and run the <command>make fate-rsync
290 ...</command> command above to sync with the upstream repository. The
291 download size and time are drastically reduced by doing this. Estimated
292 values in "Package Information" do not include the download SBU. Some
293 samples may have been removed in newer versions, so in order to be sure
294 local and server fate samples are identical when you use previously
295 saved samples, run the following command:
296 </para>
297
298<screen role="nodump"><userinput>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
299 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</userinput></screen>
300
301 <para>
302 Next, execute FATE with the following commands (there are more than 3800
303 tests in the suite):
304 </para>
305
306<screen remap="test"><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
307grep ^TEST ../fate.log | wc -l</userinput></screen>
308
309 <para>
310 where <replaceable>N</replaceable> is an integer,
311 <replaceable>N</replaceable> &le; number of cores in the system.
312 </para>
313
314 <para>
315 A successful run should return no errors or warnings, just a list of tests
316 and total amount at the end.
317 </para>
318
319 </sect2>
320
321 <sect2 role="commands">
322 <title>Command Explanations</title>
323
324
325 <para>
326 <command>find ... ;</command>: Fixes permissions of documentation files
327 and directories.
328 </para>
329
330 <para>
331 <parameter>--enable-libfreetype</parameter>: Enables
332 <application>Freetype</application> support.
333 </para>
334
335 <para>
336 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
337 permits support for postprocessing, swscale and many other features.
338 </para>
339
340 <para>
341 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
342 version 3 code.
343 </para>
344
345 <para>
346 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
347 Note that the resulting libraries and binaries will be unredistributable.
348 </para>
349
350 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
351 href="../../xincludes/static-libraries.xml"/>
352
353 <para>
354 <parameter>--enable-shared</parameter>: Enables building shared
355 libraries, otherwise only static libraries are built and installed.
356 </para>
357
358 <para>
359 <parameter>--disable-debug</parameter>: Disables building debugging
360 symbols into the programs and libraries.
361 </para>
362
363 <para>
364 <parameter>--enable-libaom</parameter>: Enables AV1 audio and video
365 decoding via <filename class="libraryfile">libaom</filename>.
366 </para>
367
368 <para>
369 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
370 rendering via <filename class="libraryfile">libass</filename>.
371 </para>
372
373 <para>
374 <option>--enable-libdrm</option>: Use this switch if
375 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
376 input module which is useful for screen capturing or streaming.
377 </para>
378
379 <para>
380 <parameter>--enable-libfdk-aac</parameter>: Enables AAC audio encoding via
381 <filename class="libraryfile">libfdk-aac</filename>.
382 </para>
383
384 <para>
385 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
386 via <filename class="libraryfile">libmp3lame</filename>.
387 </para>
388<!--
389 <para>
390 <parameter>- -enable-libvorbis</parameter>
391 <parameter>- -enable-libtheora</parameter>: Enables
392 Theora video encoding via <filename
393 class="libraryfile">libvorbis</filename> and <filename
394 class="libraryfile">libtheora</filename>.
395 </para>
396-->
397 <para>
398 <parameter>--enable-libvorbis</parameter>
399 <parameter>--enable-libvpx</parameter>: Enables WebM
400 encoding via <filename class="libraryfile">libvorbis</filename> and
401 <filename class="libraryfile">libvpx</filename>.
402 </para>
403
404 <para>
405 <parameter>--enable-libx264</parameter>: Enables high-quality
406 H.264/MPEG-4 AVC encoding via <filename
407 class="libraryfile">libx264</filename>.
408 </para>
409
410 <para>
411 <parameter>--enable-libx265</parameter>: Enables high-quality
412 H.265/HEVC encoding via <filename
413 class="libraryfile">libx265</filename>.
414 </para>
415
416 <para>
417 <parameter>--enable-openssl</parameter>:
418 Enables HTTPS protocol for network streams.
419 </para>
420
421 <!--
422 <para>
423 <parameter>- -disable-vulkan</parameter>: Disables Vulkan for the
424 current version of <xref linkend="vulkan-loader"/> due to
425 an API conflict.
426 </para>
427 -->
428
429 <para>
430 <parameter>--ignore-tests=...</parameter>: Disables tests that fail to
431 run on
432 BLFS without the optional packages. Currently the AV1 test is disabled
433 as it needs dav1d to do AV1 decoding on the CPU. The test might work if
434 you have a GPU that can decode AV1, but this was not tested.
435 </para>
436
437 <para>
438 <option>--enable-gnutls</option>: Use this option instead of
439 <parameter>--enable-openssl</parameter>, if you want to use
440 <application>GnuTLS</application> instead of
441 <application>OpenSSL</application> for HTTPS protocol.
442 </para>
443
444 <para>
445 <option>--disable-doc</option>: Disables building html documentation.
446 This is only needed if <xref linkend="doxygen"/> is installed and you
447 do not want to build the html documentation.
448 </para>
449
450 <para>
451 <option>--enable-libpulse</option>: Enables support for
452 <application>Pulseaudio</application> for audio output.
453 </para>
454
455 <para>
456 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
457 builds the <command>qt-faststart</command> program which can modify
458 QuickTime formatted movies (<filename class="extension">.mov</filename>
459 or <filename class="extension">.mp4</filename>) so that the header
460 information is located at the beginning of the file instead of the end.
461 This allows the movie file to begin playing before the entire file has
462 been downloaded.
463 </para>
464
465 <note>
466 <para>
467 Support for most of the dependency packages requires using options
468 passed to the <command>configure</command> script. View the output
469 from <command>./configure --help</command> for complete information
470 about enabling dependency packages.
471 </para>
472 </note>
473
474 </sect2>
475
476 <sect2 role="content">
477 <title>Contents</title>
478
479 <segmentedlist>
480 <segtitle>Installed Programs</segtitle>
481 <segtitle>Installed Libraries</segtitle>
482 <segtitle>Installed Directories</segtitle>
483
484 <seglistitem>
485 <seg>
486 ffmpeg, ffplay, ffprobe, <!--ffserver,--> and qt-faststart
487 </seg>
488 <seg>
489 libavcodec.so, libavdevice.so, libavfilter.so,
490 libavformat.so, libavutil.so, libpostproc.so,
491 libswresample.so, and libswscale.so
492 </seg>
493 <seg>
494 /usr/include/libav{codec,device,filter,format,util},
495 /usr/include/libpostproc,
496 /usr/include/libsw{resample,scale},
497 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
498 /usr/share/ffmpeg
499 </seg>
500 </seglistitem>
501 </segmentedlist>
502
503 <variablelist>
504 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
505 <?dbfo list-presentation="list"?>
506 <?dbhtml list-presentation="table"?>
507
508 <varlistentry id="ffmpeg-prog">
509 <term><command>ffmpeg</command></term>
510 <listitem>
511 <para>
512 is a command-line tool to convert video files, network streams and
513 input from a TV card to several video formats
514 </para>
515 <indexterm zone="ffmpeg ffmpeg-prog">
516 <primary sortas="b-ffmpeg">ffmpeg</primary>
517 </indexterm>
518 </listitem>
519 </varlistentry>
520
521 <varlistentry id="ffplay">
522 <term><command>ffplay</command></term>
523 <listitem>
524 <para>
525 is a very simple and portable media player using the
526 <filename>ffmpeg</filename> libraries and the SDL library
527 </para>
528 <indexterm zone="ffmpeg ffplay">
529 <primary sortas="b-ffplay">ffplay</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="ffprobe">
535 <term><command>ffprobe</command></term>
536 <listitem>
537 <para>
538 gathers information from multimedia streams and prints it in a human
539 and machine-readable fashion
540 </para>
541 <indexterm zone="ffmpeg ffprobe">
542 <primary sortas="b-ffprobe">ffprobe</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="qt-faststart">
548 <term><command>qt-faststart</command></term>
549 <listitem>
550 <para>
551 moves the index file to the front of quicktime (mov/mp4) videos
552 </para>
553 <indexterm zone="ffmpeg qt-faststart">
554 <primary sortas="b-qt-faststart">qt-faststart</primary>
555 </indexterm>
556 </listitem>
557 </varlistentry>
558
559 <varlistentry id="libavcodec">
560 <term><filename class="libraryfile">libavcodec.so</filename></term>
561 <listitem>
562 <para>
563 is a library containing the <application>FFmpeg</application> codecs
564 (both encoding and decoding)
565 </para>
566 <indexterm zone="ffmpeg libavcodec">
567 <primary sortas="c-libavcodec">libavcodec.so</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
572 <varlistentry id="libavdevice">
573 <term><filename class="libraryfile">libavdevice.so</filename></term>
574 <listitem>
575 <para>
576 is the <application>FFmpeg</application> device handling library
577 </para>
578 <indexterm zone="ffmpeg libavdevice">
579 <primary sortas="c-libavdevice">libavdevice.so</primary>
580 </indexterm>
581 </listitem>
582 </varlistentry>
583
584 <varlistentry id="libavfilter">
585 <term><filename class="libraryfile">libavfilter.so</filename></term>
586 <listitem>
587 <para>
588 is a library of filters that can alter video or audio between the
589 decoder and the encoder (or output)
590 </para>
591 <indexterm zone="ffmpeg libavfilter">
592 <primary sortas="c-libavfilter">libavfilter.so</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="libavformat">
598 <term><filename class="libraryfile">libavformat.so</filename></term>
599 <listitem>
600 <para>
601 is a library containing the file formats handling (mux and demux
602 code for several formats) used by <command>ffplay</command> as well
603 as allowing the generation of audio or video streams
604 </para>
605 <indexterm zone="ffmpeg libavformat">
606 <primary sortas="c-libavformat">libavformat.so</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="libavresample">
612 <term><filename class="libraryfile">libavresample.so</filename></term>
613 <listitem>
614 <para>
615 is a library containing functions for resampling audio and video.
616 </para>
617 <indexterm zone="ffmpeg libavresample">
618 <primary sortas="c-libavresample">libavresample</primary>
619 </indexterm>
620 </listitem>
621 </varlistentry>
622
623 <varlistentry id="libavutil">
624 <term><filename class="libraryfile">libavutil.so</filename></term>
625 <listitem>
626 <para>
627 is the <application>FFmpeg</application> utility library
628 </para>
629 <indexterm zone="ffmpeg libavutil">
630 <primary sortas="c-libavutil">libavutil.so</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="libpostproc">
636 <term><filename class="libraryfile">libpostproc.so</filename></term>
637 <listitem>
638 <para>
639 is the <application>FFmpeg</application> post processing library
640 </para>
641 <indexterm zone="ffmpeg libpostproc">
642 <primary sortas="c-libpostproc">libpostproc.so</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="libswresample">
648 <term><filename class="libraryfile">libswresample.so</filename></term>
649 <listitem>
650 <para>
651 is the <application>FFmpeg</application> audio rescaling library,
652 it contains functions for converting audio sample formats
653 </para>
654 <indexterm zone="ffmpeg libswresample">
655 <primary sortas="c-libswresample">libswresample.so</primary>
656 </indexterm>
657 </listitem>
658 </varlistentry>
659
660 <varlistentry id="libswscale">
661 <term><filename class="libraryfile">libswscale.so</filename></term>
662 <listitem>
663 <para>
664 is the <application>FFmpeg</application> image rescaling library
665 </para>
666 <indexterm zone="ffmpeg libswscale">
667 <primary sortas="c-libswscale">libswscale.so</primary>
668 </indexterm>
669 </listitem>
670 </varlistentry>
671
672 </variablelist>
673
674 </sect2>
675
676</sect1>
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