source: multimedia/videoutils/ffmpeg.xml@ bb72b0a

12.0 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 bb72b0a was bb72b0a, checked in by Ken Moffat <ken@…>, 11 months ago

Tags:

Some AV stuff, and most of xfce.

I have omitted thunar, thunar-volman, xfburn as I do not use them.

I've also omitted xfce4-power-manager - works ok for me, but it
might be implicated in the intel backlight issue so I'm leaving it.
  • Property mode set to 100644
File size: 24.1 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 "https://ffmpeg.org/releases/ffmpeg-&ffmpeg-version;.tar.xz">
8 <!ENTITY ffmpeg-download-ftp " ">
9 <!ENTITY ffmpeg-md5sum "47b6c5d930937413c3e308e2fdb3dfb5">
10 <!ENTITY ffmpeg-size "9.8 MB">
11 <!ENTITY ffmpeg-buildsize "187 MB (add 1.5 GB for the FATE suite/tests, add 786 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 <listitem>
85 <para>
86 Required patch:
87 <ulink url="&patch-root;/ffmpeg-&ffmpeg-version;-binutils_2.41-1.patch"/>
88 </para>
89 </listitem>
90 </itemizedlist>
91
92 <bridgehead renderas="sect3">FFmpeg Dependencies</bridgehead>
93
94 <bridgehead renderas="sect4">Recommended</bridgehead>
95 <para role="recommended">
96 <xref linkend="libaom"/>,
97 <xref linkend="libass"/>,
98 <xref linkend="fdk-aac"/>,
99 <xref linkend="freetype2"/>,
100 <xref linkend="lame"/>,
101 <xref linkend="libtheora"/>,
102 <xref linkend="libvorbis"/>,
103 <xref linkend="libvpx"/>,
104 <xref linkend="opus"/>,
105 <xref linkend="x264"/>,
106 <xref linkend="x265"/>, and
107 <xref linkend="nasm"/> or <xref linkend="yasm"/>
108 </para>
109
110 <bridgehead renderas="sect4">Recommended for desktop use</bridgehead>
111 <para role="recommended">
112 <xref linkend="alsa-lib"/>,
113 <xref linkend="libva"/>,
114 <xref linkend="libvdpau"/> (with the corresponding driver package), and
115 <xref linkend="sdl2"/>
116 </para>
117
118 <bridgehead renderas="sect4">Optional</bridgehead>
119 <para role="optional">
120 <xref linkend="doxygen"/>,
121 <xref linkend="fontconfig"/>,
122 <xref linkend="fribidi"/>,
123 <xref linkend="frei0r"/>,
124 <xref linkend="libcdio"/> (to identify and play CDs),
125 <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
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="xvid"/>,
137 <xref linkend="x-window-system"/>,
138 <ulink url="https://github.com/festvox/flite">Flite</ulink>,
139 <ulink url="https://www.quut.com/gsm/">GSM</ulink>,
140 <ulink url="https://tipok.org.ua/node/17">libaacplus</ulink>,
141 <ulink url="https://www.videolan.org/developers/libbluray.html">libbluray</ulink>,
142 <ulink url="https://github.com/cacalabs/libcaca">libcaca</ulink>,
143 <ulink url="https://gitlab.xiph.org/xiph/celt">libcelt</ulink>,
144 <ulink url="https://sourceforge.net/projects/libdc1394">libdc1394</ulink>,
145 <ulink url="https://www.videolan.org/developers/libdca.html">libdca</ulink>,
146 <ulink url="https://ieee1394.wiki.kernel.org/index.php/Libraries">libiec61883</ulink>,
147 <ulink url="https://github.com/dekkers/libilbc">libilbc</ulink>,
148 <ulink url="https://sourceforge.net/projects/modplug-xmms/">libmodplug</ulink>,
149 <ulink url="https://github.com/Distrotech/libnut">libnut</ulink> (Git checkout),
150 <ulink url="https://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
151 <ulink url="https://www.libssh.org/">libssh</ulink>,
152 <ulink url="https://openal.org/">OpenAL</ulink>,
153 <ulink url="https://sourceforge.net/projects/opencore-amr">OpenCore AMR</ulink>,
154 <ulink url="https://github.com/Haivision/srt">Srt</ulink>,
155 <ulink url="https://sourceforge.net/projects/schrodinger/">Schroedinger</ulink>,
156 <ulink url="https://www.twolame.org/">TwoLAME</ulink>,
157 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-aacenc/">vo-aaenc</ulink>,
158 <ulink url="https://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/">vo-amrwbenc</ulink>, and
159 <ulink url="https://zapping.sourceforge.net/ZVBI/">ZVBI</ulink>
160 </para>
161
162 </sect2>
163
164 <sect2 role="installation">
165 <title>Installation of FFmpeg</title>
166
167 <note>
168 <para>
169 Some harmless warnings may be output by the build process regarding
170 the HTML documentation. This is due to an incompatibility with
171 Texinfo-7.0 and higher.
172 </para>
173 </note>
174
175 <para>
176 First, apply a patch that adds an API necessary for some packages to
177 build:
178 <!-- qtwebengine -->
179 </para>
180
181<screen><userinput remap="pre">patch -Np1 -i ../ffmpeg-&ffmpeg-version;-chromium_method-1.patch</userinput></screen>
182
183 <para>
184 Now, apply a patch that allows the package to build with binutils-2.41:
185 <!-- From upstream -->
186 </para>
187
188<screen><userinput remap="pre">patch -Np1 -i ../ffmpeg-&ffmpeg-version;-binutils_2.41-1.patch</userinput></screen>
189
190 <para>
191 Install <application>FFmpeg</application> by running the following
192 commands:
193 </para>
194
195<screen><userinput>./configure --prefix=/usr \
196 --enable-gpl \
197 --enable-version3 \
198 --enable-nonfree \
199 --disable-static \
200 --enable-shared \
201 --disable-debug \
202 --enable-libaom \
203 --enable-libass \
204 --enable-libfdk-aac \
205 --enable-libfreetype \
206 --enable-libmp3lame \
207 --enable-libopus \
208 --enable-libtheora \
209 --enable-libvorbis \
210 --enable-libvpx \
211 --enable-libx264 \
212 --enable-libx265 \
213 --enable-openssl \
214 --docdir=/usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
215
216make &amp;&amp;
217
218gcc tools/qt-faststart.c -o tools/qt-faststart</userinput></screen>
219
220 <para>
221 HTML documentation was built in the previous step. If you have
222 <xref linkend="texlive"/> installed and wish to build PDF and
223 Postscript versions of the documentation, issue the following commands:
224 </para>
225
226<screen remap="doc"><userinput>pushd doc &amp;&amp;
227for DOCNAME in `basename -s .html *.html`
228do
229 texi2pdf -b $DOCNAME.texi &amp;&amp;
230 texi2dvi -b $DOCNAME.texi &amp;&amp;
231
232 dvips -o $DOCNAME.ps \
233 $DOCNAME.dvi
234done &amp;&amp;
235popd &amp;&amp;
236unset DOCNAME</userinput></screen>
237
238 <para>
239 If you have <xref linkend="doxygen"/> installed
240 and you wish to build (if --disable-doc was
241 used) or rebuild the html documentation, issue:
242 </para>
243
244<screen remap="doc"><userinput>doxygen doc/Doxyfile</userinput></screen>
245
246 <para>
247 The fate-suite tests include comparisons with installed files, and should
248 not be run before the package is installed. Therefore, if you desire to
249 run them, instructions are given further below.
250 </para>
251
252 <para>
253 Now, as the <systemitem class="username">root</systemitem> user:
254 </para>
255
256<screen role="root"><userinput>make install &amp;&amp;
257
258install -v -m755 tools/qt-faststart /usr/bin &amp;&amp;
259install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
260install -v -m644 doc/*.txt /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
261
262 <para>
263 If the PDF and Postscript documentation was built, issue the following
264 commands, as the <systemitem class="username">root</systemitem> user, to
265 install them:
266 </para>
267
268<screen role="root"
269 remap="doc"><userinput>install -v -m644 doc/*.pdf /usr/share/doc/ffmpeg-&ffmpeg-version; &amp;&amp;
270install -v -m644 doc/*.ps /usr/share/doc/ffmpeg-&ffmpeg-version;</userinput></screen>
271
272 <para>
273 If you used <command>doxygen</command> to manually create the API
274 documentation, install it by issuing the following commands
275 as the <systemitem class="username">root</systemitem> user:
276 </para>
277
278<screen role="root"
279 remap="doc"><userinput>install -v -m755 -d /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
280cp -vr doc/doxy/html/* /usr/share/doc/ffmpeg-&ffmpeg-version;/api &amp;&amp;
281find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type f -exec chmod -c 0644 \{} \; &amp;&amp;
282find /usr/share/doc/ffmpeg-&ffmpeg-version;/api -type d -exec chmod -c 0755 \{} \;</userinput></screen>
283
284 <para>
285 To properly test the installation you must have <xref linkend="rsync"/>
286 installed and follow the instructions for the <ulink
287 url="https://www.ffmpeg.org/fate.html"> FFmpeg Automated Testing
288 Environment</ulink> (FATE). First, about 1 GB of sample files used to
289 run FATE are downloaded with the command:
290 </para>
291
292<screen remap="test"><userinput>make fate-rsync SAMPLES=fate-suite/</userinput></screen>
293
294 <para>
295 The <filename class="directory">fate-suite</filename> directory is
296 created and the files are downloaded there. That command actually runs an
297 rsync command to obtain the sample files. You may want to compress and
298 keep this directory for testing again, for testing in another system,
299 or for when a new version of ffmpeg is released. Then, unpack the sample
300 files in the source directory, and run the <command>make fate-rsync
301 ...</command> command above to sync with the upstream repository. The
302 download size and time are drastically reduced by doing this. Estimated
303 values in "Package Information" do not include the download SBU. Some
304 samples may have been removed in newer versions, so in order to be sure
305 local and server fate samples are identical when you use previously
306 saved samples, run the following command:
307 </para>
308
309<screen role="nodump"><userinput>rsync -vrltLW --delete --timeout=60 --contimeout=60 \
310 rsync://fate-suite.ffmpeg.org/fate-suite/ fate-suite/</userinput></screen>
311
312 <para>
313 Next, execute FATE with the following commands (there are more than 3800
314 tests in the suite):
315 </para>
316
317<screen remap="test"><userinput>make fate THREADS=<replaceable>N</replaceable> SAMPLES=fate-suite/ | tee ../fate.log &amp;&amp;
318grep ^TEST ../fate.log | wc -l</userinput></screen>
319
320 <para>
321 where <replaceable>N</replaceable> is an integer,
322 <replaceable>N</replaceable> &le; number of cores in the system.
323 </para>
324
325 <para>
326 A successful run should return no errors or warnings, just a list of tests
327 and total amount at the end.
328 </para>
329
330 </sect2>
331
332 <sect2 role="commands">
333 <title>Command Explanations</title>
334
335 <para>
336 <command>sed -i ... configure</command>: This command adds the
337 <application>ALSA</application> library to the
338 <application>Flite</application> <envar>LDFLAGS</envar> variable and
339 enables the discovery of <application>Flite</application>.
340 </para>
341
342 <para>
343 <command>find ... ;</command>: Fixes permissions of documentation files
344 and directories.
345 </para>
346
347 <para>
348 <parameter>--enable-libfreetype</parameter>: Enables
349 <application>Freetype</application> support.
350 </para>
351
352 <para>
353 <parameter>--enable-gpl</parameter>: Enables the use of GPL code and
354 permits support for postprocessing, swscale and many other features.
355 </para>
356
357 <para>
358 <parameter>--enable-version3</parameter>: Enables the use of (L)GPL
359 version 3 code.
360 </para>
361
362 <para>
363 <parameter>--enable-nonfree</parameter>: Enables the use of nonfree code.
364 Note that the resulting libraries and binaries will be unredistributable.
365 </para>
366
367 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
368 href="../../xincludes/static-libraries.xml"/>
369
370 <para>
371 <parameter>--enable-shared</parameter>: Enables building shared
372 libraries, otherwise only static libraries are built and installed.
373 </para>
374
375 <para>
376 <parameter>--disable-debug</parameter>: Disables building debugging
377 symbols into the programs and libraries.
378 </para>
379
380 <para>
381 <parameter>--enable-libaom</parameter>: Enables AV1 audio and video
382 decoding via <filename class="libraryfile">libaom</filename>.
383 </para>
384
385 <para>
386 <parameter>--enable-libass</parameter>: Enables ASS/SSA subtitle format
387 rendering via <filename class="libraryfile">libass</filename>.
388 </para>
389
390 <para>
391 <option>--enable-libdrm</option>: Use this switch if
392 <xref linkend="libdrm"/> is installed to build the <quote>kmsgrab</quote>
393 input module which is useful for screen capturing or streaming.
394 </para>
395
396 <para>
397 <parameter>--enable-libfdk-aac</parameter>: Enables AAC audio encoding via
398 <filename class="libraryfile">libfdk-aac</filename>.
399 </para>
400
401 <para>
402 <parameter>--enable-libmp3lame</parameter>: Enables MP3 audio encoding
403 via <filename class="libraryfile">libmp3lame</filename>.
404 </para>
405
406 <para>
407 <parameter>--enable-libvorbis --enable-libtheora</parameter>: Enables
408 Theora video encoding via <filename
409 class="libraryfile">libvorbis</filename> and <filename
410 class="libraryfile">libtheora</filename>.
411 </para>
412
413 <para>
414 <parameter>--enable-libvorbis --enable-libvpx</parameter>: Enables WebM
415 encoding via <filename class="libraryfile">libvorbis</filename> and
416 <filename class="libraryfile">libvpx</filename>.
417 </para>
418
419 <para>
420 <parameter>--enable-libx264</parameter>: Enables high-quality
421 H.264/MPEG-4 AVC encoding via <filename
422 class="libraryfile">libx264</filename>.
423 </para>
424
425 <para>
426 <parameter>--enable-libx265</parameter>: Enables high-quality
427 H.265/HEVC encoding via <filename
428 class="libraryfile">libx265</filename>.
429 </para>
430
431 <para>
432 <parameter>--enable-openssl</parameter>:
433 Enables HTTPS protocol for network streams.
434 </para>
435
436 <para>
437 <option>--enable-gnutls</option>: Use this option instead of
438 <parameter>--enable-openssl</parameter>, if you want to use
439 <application>GnuTLS</application> instead of
440 <application>OpenSSL</application> for HTTPS protocol.
441 </para>
442
443 <para>
444 <option>--disable-doc</option>: Disables building html documentation.
445 This is only needed if <xref linkend="doxygen"/> is installed and you
446 do not want to build the html documentation.
447 </para>
448
449 <para>
450 <option>--enable-libpulse</option>: Enables support for
451 <application>Pulseaudio</application> for audio output.
452 </para>
453
454 <para>
455 <command>gcc tools/qt-faststart.c -o tools/qt-faststart</command>: This
456 builds the <command>qt-faststart</command> program which can modify
457 QuickTime formatted movies (<filename class="extension">.mov</filename>
458 or <filename class="extension">.mp4</filename>) so that the header
459 information is located at the beginning of the file instead of the end.
460 This allows the movie file to begin playing before the entire file has
461 been downloaded.
462 </para>
463
464 <note>
465 <para>
466 Support for most of the dependency packages requires using options
467 passed to the <command>configure</command> script. View the output
468 from <command>./configure --help</command> for complete information
469 about enabling dependency packages.
470 </para>
471 </note>
472
473 </sect2>
474
475 <sect2 role="content">
476 <title>Contents</title>
477
478 <segmentedlist>
479 <segtitle>Installed Programs</segtitle>
480 <segtitle>Installed Libraries</segtitle>
481 <segtitle>Installed Directories</segtitle>
482
483 <seglistitem>
484 <seg>
485 ffmpeg, ffplay, ffprobe, <!--ffserver,--> and qt-faststart
486 </seg>
487 <seg>
488 libavcodec.so, libavdevice.so, libavfilter.so,
489 libavformat.so, libavutil.so, libpostproc.so,
490 libswresample.so, and libswscale.so
491 </seg>
492 <seg>
493 /usr/include/libav{codec,device,filter,format,util},
494 /usr/include/libpostproc,
495 /usr/include/libsw{resample,scale},
496 /usr/share/doc/ffmpeg-&ffmpeg-version;, and
497 /usr/share/ffmpeg
498 </seg>
499 </seglistitem>
500 </segmentedlist>
501
502 <variablelist>
503 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
504 <?dbfo list-presentation="list"?>
505 <?dbhtml list-presentation="table"?>
506
507 <varlistentry id="ffmpeg-prog">
508 <term><command>ffmpeg</command></term>
509 <listitem>
510 <para>
511 is a command-line tool to convert video files, network streams and
512 input from a TV card to several video formats
513 </para>
514 <indexterm zone="ffmpeg ffmpeg-prog">
515 <primary sortas="b-ffmpeg">ffmpeg</primary>
516 </indexterm>
517 </listitem>
518 </varlistentry>
519
520 <varlistentry id="ffplay">
521 <term><command>ffplay</command></term>
522 <listitem>
523 <para>
524 is a very simple and portable media player using the
525 <filename>ffmpeg</filename> libraries and the SDL library
526 </para>
527 <indexterm zone="ffmpeg ffplay">
528 <primary sortas="b-ffplay">ffplay</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="ffprobe">
534 <term><command>ffprobe</command></term>
535 <listitem>
536 <para>
537 gathers information from multimedia streams and prints it in a human
538 and machine-readable fashion
539 </para>
540 <indexterm zone="ffmpeg ffprobe">
541 <primary sortas="b-ffprobe">ffprobe</primary>
542 </indexterm>
543 </listitem>
544 </varlistentry>
545
546 <varlistentry id="qt-faststart">
547 <term><command>qt-faststart</command></term>
548 <listitem>
549 <para>
550 moves the index file to the front of quicktime (mov/mp4) videos
551 </para>
552 <indexterm zone="ffmpeg qt-faststart">
553 <primary sortas="b-qt-faststart">qt-faststart</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="libavcodec">
559 <term><filename class="libraryfile">libavcodec.so</filename></term>
560 <listitem>
561 <para>
562 is a library containing the <application>FFmpeg</application> codecs
563 (both encoding and decoding)
564 </para>
565 <indexterm zone="ffmpeg libavcodec">
566 <primary sortas="c-libavcodec">libavcodec.so</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="libavdevice">
572 <term><filename class="libraryfile">libavdevice.so</filename></term>
573 <listitem>
574 <para>
575 is the <application>FFmpeg</application> device handling library
576 </para>
577 <indexterm zone="ffmpeg libavdevice">
578 <primary sortas="c-libavdevice">libavdevice.so</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="libavfilter">
584 <term><filename class="libraryfile">libavfilter.so</filename></term>
585 <listitem>
586 <para>
587 is a library of filters that can alter video or audio between the
588 decoder and the encoder (or output)
589 </para>
590 <indexterm zone="ffmpeg libavfilter">
591 <primary sortas="c-libavfilter">libavfilter.so</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
596 <varlistentry id="libavformat">
597 <term><filename class="libraryfile">libavformat.so</filename></term>
598 <listitem>
599 <para>
600 is a library containing the file formats handling (mux and demux
601 code for several formats) used by <command>ffplay</command> as well
602 as allowing the generation of audio or video streams
603 </para>
604 <indexterm zone="ffmpeg libavformat">
605 <primary sortas="c-libavformat">libavformat.so</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609
610 <varlistentry id="libavresample">
611 <term><filename class="libraryfile">libavresample.so</filename></term>
612 <listitem>
613 <para>
614 is a library containing functions for resampling audio and video.
615 </para>
616 <indexterm zone="ffmpeg libavresample">
617 <primary sortas="c-libavresample">libavresample</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="libavutil">
623 <term><filename class="libraryfile">libavutil.so</filename></term>
624 <listitem>
625 <para>
626 is the <application>FFmpeg</application> utility library
627 </para>
628 <indexterm zone="ffmpeg libavutil">
629 <primary sortas="c-libavutil">libavutil.so</primary>
630 </indexterm>
631 </listitem>
632 </varlistentry>
633
634 <varlistentry id="libpostproc">
635 <term><filename class="libraryfile">libpostproc.so</filename></term>
636 <listitem>
637 <para>
638 is the <application>FFmpeg</application> post processing library
639 </para>
640 <indexterm zone="ffmpeg libpostproc">
641 <primary sortas="c-libpostproc">libpostproc.so</primary>
642 </indexterm>
643 </listitem>
644 </varlistentry>
645
646 <varlistentry id="libswresample">
647 <term><filename class="libraryfile">libswresample.so</filename></term>
648 <listitem>
649 <para>
650 is the <application>FFmpeg</application> audio rescaling library,
651 it contains functions for converting audio sample formats
652 </para>
653 <indexterm zone="ffmpeg libswresample">
654 <primary sortas="c-libswresample">libswresample.so</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
658
659 <varlistentry id="libswscale">
660 <term><filename class="libraryfile">libswscale.so</filename></term>
661 <listitem>
662 <para>
663 is the <application>FFmpeg</application> image rescaling library
664 </para>
665 <indexterm zone="ffmpeg libswscale">
666 <primary sortas="c-libswscale">libswscale.so</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
671 </variablelist>
672
673 </sect2>
674
675</sect1>
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