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| author | Indrajith K L | 2022-12-03 17:00:20 +0530 |
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| committer | Indrajith K L | 2022-12-03 17:00:20 +0530 |
| commit | f5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch) | |
| tree | 2764fc62da58f2ba8da7ed341643fc359873142f /ffmpeg/doc/ffplay.html | |
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diff --git a/ffmpeg/doc/ffplay.html b/ffmpeg/doc/ffplay.html new file mode 100644 index 0000000..6e992eb --- /dev/null +++ b/ffmpeg/doc/ffplay.html @@ -0,0 +1,866 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ --> + <head> + <meta charset="utf-8"> + <title> + ffplay Documentation + </title> + <meta name="viewport" content="width=device-width,initial-scale=1.0"> + <link rel="stylesheet" type="text/css" href="bootstrap.min.css"> + <link rel="stylesheet" type="text/css" href="style.min.css"> + </head> + <body> + <div class="container"> + <h1> + ffplay Documentation + </h1> +<div align="center"> +</div> + + +<a name="SEC_Top"></a> + +<div class="Contents_element" id="SEC_Contents"> +<h2 class="contents-heading">Table of Contents</h2> + +<div class="contents"> + +<ul class="no-bullet"> + <li><a id="toc-Synopsis" href="#Synopsis">1 Synopsis</a></li> + <li><a id="toc-Description" href="#Description">2 Description</a></li> + <li><a id="toc-Options" href="#Options">3 Options</a> + <ul class="no-bullet"> + <li><a id="toc-Stream-specifiers-1" href="#Stream-specifiers-1">3.1 Stream specifiers</a></li> + <li><a id="toc-Generic-options" href="#Generic-options">3.2 Generic options</a></li> + <li><a id="toc-AVOptions" href="#AVOptions">3.3 AVOptions</a></li> + <li><a id="toc-Main-options" href="#Main-options">3.4 Main options</a></li> + <li><a id="toc-Advanced-options" href="#Advanced-options">3.5 Advanced options</a></li> + <li><a id="toc-While-playing" href="#While-playing">3.6 While playing</a></li> + </ul></li> + <li><a id="toc-See-Also" href="#See-Also">4 See Also</a></li> + <li><a id="toc-Authors" href="#Authors">5 Authors</a></li> +</ul> +</div> +</div> + +<a name="Synopsis"></a> +<h2 class="chapter">1 Synopsis<span class="pull-right"><a class="anchor hidden-xs" href="#Synopsis" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Synopsis" aria-hidden="true">TOC</a></span></h2> + +<p>ffplay [<var>options</var>] [<samp>input_url</samp>] +</p> +<a name="Description"></a> +<h2 class="chapter">2 Description<span class="pull-right"><a class="anchor hidden-xs" href="#Description" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Description" aria-hidden="true">TOC</a></span></h2> + +<p>FFplay is a very simple and portable media player using the FFmpeg +libraries and the SDL library. It is mostly used as a testbed for the +various FFmpeg APIs. +</p> +<a name="Options"></a> +<h2 class="chapter">3 Options<span class="pull-right"><a class="anchor hidden-xs" href="#Options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Options" aria-hidden="true">TOC</a></span></h2> + +<p>All the numerical options, if not specified otherwise, accept a string +representing a number as input, which may be followed by one of the SI +unit prefixes, for example: ’K’, ’M’, or ’G’. +</p> +<p>If ’i’ is appended to the SI unit prefix, the complete prefix will be +interpreted as a unit prefix for binary multiples, which are based on +powers of 1024 instead of powers of 1000. Appending ’B’ to the SI unit +prefix multiplies the value by 8. This allows using, for example: +’KB’, ’MiB’, ’G’ and ’B’ as number suffixes. +</p> +<p>Options which do not take arguments are boolean options, and set the +corresponding value to true. They can be set to false by prefixing +the option name with "no". For example using "-nofoo" +will set the boolean option with name "foo" to false. +</p> +<span id="Stream-specifiers"></span><a name="Stream-specifiers-1"></a> +<h3 class="section">3.1 Stream specifiers<span class="pull-right"><a class="anchor hidden-xs" href="#Stream-specifiers-1" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Stream-specifiers-1" aria-hidden="true">TOC</a></span></h3> +<p>Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers +are used to precisely specify which stream(s) a given option belongs to. +</p> +<p>A stream specifier is a string generally appended to the option name and +separated from it by a colon. E.g. <code>-codec:a:1 ac3</code> contains the +<code>a:1</code> stream specifier, which matches the second audio stream. Therefore, it +would select the ac3 codec for the second audio stream. +</p> +<p>A stream specifier can match several streams, so that the option is applied to all +of them. E.g. the stream specifier in <code>-b:a 128k</code> matches all audio +streams. +</p> +<p>An empty stream specifier matches all streams. For example, <code>-codec copy</code> +or <code>-codec: copy</code> would copy all the streams without reencoding. +</p> +<p>Possible forms of stream specifiers are: +</p><dl compact="compact"> +<dt><span><samp><var>stream_index</var></samp></span></dt> +<dd><p>Matches the stream with this index. E.g. <code>-threads:1 4</code> would set the +thread count for the second stream to 4. If <var>stream_index</var> is used as an +additional stream specifier (see below), then it selects stream number +<var>stream_index</var> from the matching streams. Stream numbering is based on the +order of the streams as detected by libavformat except when a program ID is +also specified. In this case it is based on the ordering of the streams in the +program. +</p></dd> +<dt><span><samp><var>stream_type</var>[:<var>additional_stream_specifier</var>]</samp></span></dt> +<dd><p><var>stream_type</var> is one of following: ’v’ or ’V’ for video, ’a’ for audio, ’s’ +for subtitle, ’d’ for data, and ’t’ for attachments. ’v’ matches all video +streams, ’V’ only matches video streams which are not attached pictures, video +thumbnails or cover arts. If <var>additional_stream_specifier</var> is used, then +it matches streams which both have this type and match the +<var>additional_stream_specifier</var>. Otherwise, it matches all streams of the +specified type. +</p></dd> +<dt><span><samp>p:<var>program_id</var>[:<var>additional_stream_specifier</var>]</samp></span></dt> +<dd><p>Matches streams which are in the program with the id <var>program_id</var>. If +<var>additional_stream_specifier</var> is used, then it matches streams which both +are part of the program and match the <var>additional_stream_specifier</var>. +</p> +</dd> +<dt><span><samp>#<var>stream_id</var> or i:<var>stream_id</var></samp></span></dt> +<dd><p>Match the stream by stream id (e.g. PID in MPEG-TS container). +</p></dd> +<dt><span><samp>m:<var>key</var>[:<var>value</var>]</samp></span></dt> +<dd><p>Matches streams with the metadata tag <var>key</var> having the specified value. If +<var>value</var> is not given, matches streams that contain the given tag with any +value. +</p></dd> +<dt><span><samp>u</samp></span></dt> +<dd><p>Matches streams with usable configuration, the codec must be defined and the +essential information such as video dimension or audio sample rate must be present. +</p> +<p>Note that in <code>ffmpeg</code>, matching by metadata will only work properly for +input files. +</p></dd> +</dl> + +<a name="Generic-options"></a> +<h3 class="section">3.2 Generic options<span class="pull-right"><a class="anchor hidden-xs" href="#Generic-options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Generic-options" aria-hidden="true">TOC</a></span></h3> + +<p>These options are shared amongst the ff* tools. +</p> +<dl compact="compact"> +<dt><span><samp>-L</samp></span></dt> +<dd><p>Show license. +</p> +</dd> +<dt><span><samp>-h, -?, -help, --help [<var>arg</var>]</samp></span></dt> +<dd><p>Show help. An optional parameter may be specified to print help about a specific +item. If no argument is specified, only basic (non advanced) tool +options are shown. +</p> +<p>Possible values of <var>arg</var> are: +</p><dl compact="compact"> +<dt><span><samp>long</samp></span></dt> +<dd><p>Print advanced tool options in addition to the basic tool options. +</p> +</dd> +<dt><span><samp>full</samp></span></dt> +<dd><p>Print complete list of options, including shared and private options +for encoders, decoders, demuxers, muxers, filters, etc. +</p> +</dd> +<dt><span><samp>decoder=<var>decoder_name</var></samp></span></dt> +<dd><p>Print detailed information about the decoder named <var>decoder_name</var>. Use the +<samp>-decoders</samp> option to get a list of all decoders. +</p> +</dd> +<dt><span><samp>encoder=<var>encoder_name</var></samp></span></dt> +<dd><p>Print detailed information about the encoder named <var>encoder_name</var>. Use the +<samp>-encoders</samp> option to get a list of all encoders. +</p> +</dd> +<dt><span><samp>demuxer=<var>demuxer_name</var></samp></span></dt> +<dd><p>Print detailed information about the demuxer named <var>demuxer_name</var>. Use the +<samp>-formats</samp> option to get a list of all demuxers and muxers. +</p> +</dd> +<dt><span><samp>muxer=<var>muxer_name</var></samp></span></dt> +<dd><p>Print detailed information about the muxer named <var>muxer_name</var>. Use the +<samp>-formats</samp> option to get a list of all muxers and demuxers. +</p> +</dd> +<dt><span><samp>filter=<var>filter_name</var></samp></span></dt> +<dd><p>Print detailed information about the filter named <var>filter_name</var>. Use the +<samp>-filters</samp> option to get a list of all filters. +</p> +</dd> +<dt><span><samp>bsf=<var>bitstream_filter_name</var></samp></span></dt> +<dd><p>Print detailed information about the bitstream filter named <var>bitstream_filter_name</var>. +Use the <samp>-bsfs</samp> option to get a list of all bitstream filters. +</p> +</dd> +<dt><span><samp>protocol=<var>protocol_name</var></samp></span></dt> +<dd><p>Print detailed information about the protocol named <var>protocol_name</var>. +Use the <samp>-protocols</samp> option to get a list of all protocols. +</p></dd> +</dl> + +</dd> +<dt><span><samp>-version</samp></span></dt> +<dd><p>Show version. +</p> +</dd> +<dt><span><samp>-buildconf</samp></span></dt> +<dd><p>Show the build configuration, one option per line. +</p> +</dd> +<dt><span><samp>-formats</samp></span></dt> +<dd><p>Show available formats (including devices). +</p> +</dd> +<dt><span><samp>-demuxers</samp></span></dt> +<dd><p>Show available demuxers. +</p> +</dd> +<dt><span><samp>-muxers</samp></span></dt> +<dd><p>Show available muxers. +</p> +</dd> +<dt><span><samp>-devices</samp></span></dt> +<dd><p>Show available devices. +</p> +</dd> +<dt><span><samp>-codecs</samp></span></dt> +<dd><p>Show all codecs known to libavcodec. +</p> +<p>Note that the term ’codec’ is used throughout this documentation as a shortcut +for what is more correctly called a media bitstream format. +</p> +</dd> +<dt><span><samp>-decoders</samp></span></dt> +<dd><p>Show available decoders. +</p> +</dd> +<dt><span><samp>-encoders</samp></span></dt> +<dd><p>Show all available encoders. +</p> +</dd> +<dt><span><samp>-bsfs</samp></span></dt> +<dd><p>Show available bitstream filters. +</p> +</dd> +<dt><span><samp>-protocols</samp></span></dt> +<dd><p>Show available protocols. +</p> +</dd> +<dt><span><samp>-filters</samp></span></dt> +<dd><p>Show available libavfilter filters. +</p> +</dd> +<dt><span><samp>-pix_fmts</samp></span></dt> +<dd><p>Show available pixel formats. +</p> +</dd> +<dt><span><samp>-sample_fmts</samp></span></dt> +<dd><p>Show available sample formats. +</p> +</dd> +<dt><span><samp>-layouts</samp></span></dt> +<dd><p>Show channel names and standard channel layouts. +</p> +</dd> +<dt><span><samp>-dispositions</samp></span></dt> +<dd><p>Show stream dispositions. +</p> +</dd> +<dt><span><samp>-colors</samp></span></dt> +<dd><p>Show recognized color names. +</p> +</dd> +<dt><span><samp>-sources <var>device</var>[,<var>opt1</var>=<var>val1</var>[,<var>opt2</var>=<var>val2</var>]...]</samp></span></dt> +<dd><p>Show autodetected sources of the input device. +Some devices may provide system-dependent source names that cannot be autodetected. +The returned list cannot be assumed to be always complete. +</p><div class="example"> +<pre class="example">ffmpeg -sources pulse,server=192.168.0.4 +</pre></div> + +</dd> +<dt><span><samp>-sinks <var>device</var>[,<var>opt1</var>=<var>val1</var>[,<var>opt2</var>=<var>val2</var>]...]</samp></span></dt> +<dd><p>Show autodetected sinks of the output device. +Some devices may provide system-dependent sink names that cannot be autodetected. +The returned list cannot be assumed to be always complete. +</p><div class="example"> +<pre class="example">ffmpeg -sinks pulse,server=192.168.0.4 +</pre></div> + +</dd> +<dt><span><samp>-loglevel [<var>flags</var>+]<var>loglevel</var> | -v [<var>flags</var>+]<var>loglevel</var></samp></span></dt> +<dd><p>Set logging level and flags used by the library. +</p> +<p>The optional <var>flags</var> prefix can consist of the following values: +</p><dl compact="compact"> +<dt><span>‘<samp>repeat</samp>’</span></dt> +<dd><p>Indicates that repeated log output should not be compressed to the first line +and the "Last message repeated n times" line will be omitted. +</p></dd> +<dt><span>‘<samp>level</samp>’</span></dt> +<dd><p>Indicates that log output should add a <code>[level]</code> prefix to each message +line. This can be used as an alternative to log coloring, e.g. when dumping the +log to file. +</p></dd> +</dl> +<p>Flags can also be used alone by adding a ’+’/’-’ prefix to set/reset a single +flag without affecting other <var>flags</var> or changing <var>loglevel</var>. When +setting both <var>flags</var> and <var>loglevel</var>, a ’+’ separator is expected +between the last <var>flags</var> value and before <var>loglevel</var>. +</p> +<p><var>loglevel</var> is a string or a number containing one of the following values: +</p><dl compact="compact"> +<dt><span>‘<samp>quiet, -8</samp>’</span></dt> +<dd><p>Show nothing at all; be silent. +</p></dd> +<dt><span>‘<samp>panic, 0</samp>’</span></dt> +<dd><p>Only show fatal errors which could lead the process to crash, such as +an assertion failure. This is not currently used for anything. +</p></dd> +<dt><span>‘<samp>fatal, 8</samp>’</span></dt> +<dd><p>Only show fatal errors. These are errors after which the process absolutely +cannot continue. +</p></dd> +<dt><span>‘<samp>error, 16</samp>’</span></dt> +<dd><p>Show all errors, including ones which can be recovered from. +</p></dd> +<dt><span>‘<samp>warning, 24</samp>’</span></dt> +<dd><p>Show all warnings and errors. Any message related to possibly +incorrect or unexpected events will be shown. +</p></dd> +<dt><span>‘<samp>info, 32</samp>’</span></dt> +<dd><p>Show informative messages during processing. This is in addition to +warnings and errors. This is the default value. +</p></dd> +<dt><span>‘<samp>verbose, 40</samp>’</span></dt> +<dd><p>Same as <code>info</code>, except more verbose. +</p></dd> +<dt><span>‘<samp>debug, 48</samp>’</span></dt> +<dd><p>Show everything, including debugging information. +</p></dd> +<dt><span>‘<samp>trace, 56</samp>’</span></dt> +</dl> + +<p>For example to enable repeated log output, add the <code>level</code> prefix, and set +<var>loglevel</var> to <code>verbose</code>: +</p><div class="example"> +<pre class="example">ffmpeg -loglevel repeat+level+verbose -i input output +</pre></div> +<p>Another example that enables repeated log output without affecting current +state of <code>level</code> prefix flag or <var>loglevel</var>: +</p><div class="example"> +<pre class="example">ffmpeg [...] -loglevel +repeat +</pre></div> + +<p>By default the program logs to stderr. If coloring is supported by the +terminal, colors are used to mark errors and warnings. Log coloring +can be disabled setting the environment variable +<code>AV_LOG_FORCE_NOCOLOR</code>, or can be forced setting +the environment variable <code>AV_LOG_FORCE_COLOR</code>. +</p> +</dd> +<dt><span><samp>-report</samp></span></dt> +<dd><p>Dump full command line and log output to a file named +<code><var>program</var>-<var>YYYYMMDD</var>-<var>HHMMSS</var>.log</code> in the current +directory. +This file can be useful for bug reports. +It also implies <code>-loglevel debug</code>. +</p> +<p>Setting the environment variable <code>FFREPORT</code> to any value has the +same effect. If the value is a ’:’-separated key=value sequence, these +options will affect the report; option values must be escaped if they +contain special characters or the options delimiter ’:’ (see the +“Quoting and escaping” section in the ffmpeg-utils manual). +</p> +<p>The following options are recognized: +</p><dl compact="compact"> +<dt><span><samp>file</samp></span></dt> +<dd><p>set the file name to use for the report; <code>%p</code> is expanded to the name +of the program, <code>%t</code> is expanded to a timestamp, <code>%%</code> is expanded +to a plain <code>%</code> +</p></dd> +<dt><span><samp>level</samp></span></dt> +<dd><p>set the log verbosity level using a numerical value (see <code>-loglevel</code>). +</p></dd> +</dl> + +<p>For example, to output a report to a file named <samp>ffreport.log</samp> +using a log level of <code>32</code> (alias for log level <code>info</code>): +</p> +<div class="example"> +<pre class="example">FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output +</pre></div> + +<p>Errors in parsing the environment variable are not fatal, and will not +appear in the report. +</p> +</dd> +<dt><span><samp>-hide_banner</samp></span></dt> +<dd><p>Suppress printing banner. +</p> +<p>All FFmpeg tools will normally show a copyright notice, build options +and library versions. This option can be used to suppress printing +this information. +</p> +</dd> +<dt><span><samp>-cpuflags flags (<em>global</em>)</samp></span></dt> +<dd><p>Allows setting and clearing cpu flags. This option is intended +for testing. Do not use it unless you know what you’re doing. +</p><div class="example"> +<pre class="example">ffmpeg -cpuflags -sse+mmx ... +ffmpeg -cpuflags mmx ... +ffmpeg -cpuflags 0 ... +</pre></div> +<p>Possible flags for this option are: +</p><dl compact="compact"> +<dt><span>‘<samp>x86</samp>’</span></dt> +<dd><dl compact="compact"> +<dt><span>‘<samp>mmx</samp>’</span></dt> +<dt><span>‘<samp>mmxext</samp>’</span></dt> +<dt><span>‘<samp>sse</samp>’</span></dt> +<dt><span>‘<samp>sse2</samp>’</span></dt> +<dt><span>‘<samp>sse2slow</samp>’</span></dt> +<dt><span>‘<samp>sse3</samp>’</span></dt> +<dt><span>‘<samp>sse3slow</samp>’</span></dt> +<dt><span>‘<samp>ssse3</samp>’</span></dt> +<dt><span>‘<samp>atom</samp>’</span></dt> +<dt><span>‘<samp>sse4.1</samp>’</span></dt> +<dt><span>‘<samp>sse4.2</samp>’</span></dt> +<dt><span>‘<samp>avx</samp>’</span></dt> +<dt><span>‘<samp>avx2</samp>’</span></dt> +<dt><span>‘<samp>xop</samp>’</span></dt> +<dt><span>‘<samp>fma3</samp>’</span></dt> +<dt><span>‘<samp>fma4</samp>’</span></dt> +<dt><span>‘<samp>3dnow</samp>’</span></dt> +<dt><span>‘<samp>3dnowext</samp>’</span></dt> +<dt><span>‘<samp>bmi1</samp>’</span></dt> +<dt><span>‘<samp>bmi2</samp>’</span></dt> +<dt><span>‘<samp>cmov</samp>’</span></dt> +</dl> +</dd> +<dt><span>‘<samp>ARM</samp>’</span></dt> +<dd><dl compact="compact"> +<dt><span>‘<samp>armv5te</samp>’</span></dt> +<dt><span>‘<samp>armv6</samp>’</span></dt> +<dt><span>‘<samp>armv6t2</samp>’</span></dt> +<dt><span>‘<samp>vfp</samp>’</span></dt> +<dt><span>‘<samp>vfpv3</samp>’</span></dt> +<dt><span>‘<samp>neon</samp>’</span></dt> +<dt><span>‘<samp>setend</samp>’</span></dt> +</dl> +</dd> +<dt><span>‘<samp>AArch64</samp>’</span></dt> +<dd><dl compact="compact"> +<dt><span>‘<samp>armv8</samp>’</span></dt> +<dt><span>‘<samp>vfp</samp>’</span></dt> +<dt><span>‘<samp>neon</samp>’</span></dt> +</dl> +</dd> +<dt><span>‘<samp>PowerPC</samp>’</span></dt> +<dd><dl compact="compact"> +<dt><span>‘<samp>altivec</samp>’</span></dt> +</dl> +</dd> +<dt><span>‘<samp>Specific Processors</samp>’</span></dt> +<dd><dl compact="compact"> +<dt><span>‘<samp>pentium2</samp>’</span></dt> +<dt><span>‘<samp>pentium3</samp>’</span></dt> +<dt><span>‘<samp>pentium4</samp>’</span></dt> +<dt><span>‘<samp>k6</samp>’</span></dt> +<dt><span>‘<samp>k62</samp>’</span></dt> +<dt><span>‘<samp>athlon</samp>’</span></dt> +<dt><span>‘<samp>athlonxp</samp>’</span></dt> +<dt><span>‘<samp>k8</samp>’</span></dt> +</dl> +</dd> +</dl> + +</dd> +<dt><span><samp>-cpucount <var>count</var> (<em>global</em>)</samp></span></dt> +<dd><p>Override detection of CPU count. This option is intended +for testing. Do not use it unless you know what you’re doing. +</p><div class="example"> +<pre class="example">ffmpeg -cpucount 2 +</pre></div> + +</dd> +<dt><span><samp>-max_alloc <var>bytes</var></samp></span></dt> +<dd><p>Set the maximum size limit for allocating a block on the heap by ffmpeg’s +family of malloc functions. Exercise <strong>extreme caution</strong> when using +this option. Don’t use if you do not understand the full consequence of doing so. +Default is INT_MAX. +</p></dd> +</dl> + +<a name="AVOptions"></a> +<h3 class="section">3.3 AVOptions<span class="pull-right"><a class="anchor hidden-xs" href="#AVOptions" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-AVOptions" aria-hidden="true">TOC</a></span></h3> + +<p>These options are provided directly by the libavformat, libavdevice and +libavcodec libraries. To see the list of available AVOptions, use the +<samp>-help</samp> option. They are separated into two categories: +</p><dl compact="compact"> +<dt><span><samp>generic</samp></span></dt> +<dd><p>These options can be set for any container, codec or device. Generic options +are listed under AVFormatContext options for containers/devices and under +AVCodecContext options for codecs. +</p></dd> +<dt><span><samp>private</samp></span></dt> +<dd><p>These options are specific to the given container, device or codec. Private +options are listed under their corresponding containers/devices/codecs. +</p></dd> +</dl> + +<p>For example to write an ID3v2.3 header instead of a default ID3v2.4 to +an MP3 file, use the <samp>id3v2_version</samp> private option of the MP3 +muxer: +</p><div class="example"> +<pre class="example">ffmpeg -i input.flac -id3v2_version 3 out.mp3 +</pre></div> + +<p>All codec AVOptions are per-stream, and thus a stream specifier +should be attached to them: +</p><div class="example"> +<pre class="example">ffmpeg -i multichannel.mxf -map 0:v:0 -map 0:a:0 -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:1 2 -c:a:1 aac -b:2 128k out.mp4 +</pre></div> + +<p>In the above example, a multichannel audio stream is mapped twice for output. +The first instance is encoded with codec ac3 and bitrate 640k. +The second instance is downmixed to 2 channels and encoded with codec aac. A bitrate of 128k is specified for it using +absolute index of the output stream. +</p> +<p>Note: the <samp>-nooption</samp> syntax cannot be used for boolean +AVOptions, use <samp>-option 0</samp>/<samp>-option 1</samp>. +</p> +<p>Note: the old undocumented way of specifying per-stream AVOptions by +prepending v/a/s to the options name is now obsolete and will be +removed soon. +</p> +<a name="Main-options"></a> +<h3 class="section">3.4 Main options<span class="pull-right"><a class="anchor hidden-xs" href="#Main-options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Main-options" aria-hidden="true">TOC</a></span></h3> + +<dl compact="compact"> +<dt><span><samp>-x <var>width</var></samp></span></dt> +<dd><p>Force displayed width. +</p></dd> +<dt><span><samp>-y <var>height</var></samp></span></dt> +<dd><p>Force displayed height. +</p></dd> +<dt><span><samp>-fs</samp></span></dt> +<dd><p>Start in fullscreen mode. +</p></dd> +<dt><span><samp>-an</samp></span></dt> +<dd><p>Disable audio. +</p></dd> +<dt><span><samp>-vn</samp></span></dt> +<dd><p>Disable video. +</p></dd> +<dt><span><samp>-sn</samp></span></dt> +<dd><p>Disable subtitles. +</p></dd> +<dt><span><samp>-ss <var>pos</var></samp></span></dt> +<dd><p>Seek to <var>pos</var>. Note that in most formats it is not possible to seek +exactly, so <code>ffplay</code> will seek to the nearest seek point to +<var>pos</var>. +</p> +<p><var>pos</var> must be a time duration specification, +see <a data-manual="ffmpeg-utils" href="ffmpeg-utils.html#time-duration-syntax">(ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual</a>. +</p></dd> +<dt><span><samp>-t <var>duration</var></samp></span></dt> +<dd><p>Play <var>duration</var> seconds of audio/video. +</p> +<p><var>duration</var> must be a time duration specification, +see <a data-manual="ffmpeg-utils" href="ffmpeg-utils.html#time-duration-syntax">(ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual</a>. +</p></dd> +<dt><span><samp>-bytes</samp></span></dt> +<dd><p>Seek by bytes. +</p></dd> +<dt><span><samp>-seek_interval</samp></span></dt> +<dd><p>Set custom interval, in seconds, for seeking using left/right keys. Default is 10 seconds. +</p></dd> +<dt><span><samp>-nodisp</samp></span></dt> +<dd><p>Disable graphical display. +</p></dd> +<dt><span><samp>-noborder</samp></span></dt> +<dd><p>Borderless window. +</p></dd> +<dt><span><samp>-alwaysontop</samp></span></dt> +<dd><p>Window always on top. Available on: X11 with SDL >= 2.0.5, Windows SDL >= 2.0.6. +</p></dd> +<dt><span><samp>-volume</samp></span></dt> +<dd><p>Set the startup volume. 0 means silence, 100 means no volume reduction or +amplification. Negative values are treated as 0, values above 100 are treated +as 100. +</p></dd> +<dt><span><samp>-f <var>fmt</var></samp></span></dt> +<dd><p>Force format. +</p></dd> +<dt><span><samp>-window_title <var>title</var></samp></span></dt> +<dd><p>Set window title (default is the input filename). +</p></dd> +<dt><span><samp>-left <var>title</var></samp></span></dt> +<dd><p>Set the x position for the left of the window (default is a centered window). +</p></dd> +<dt><span><samp>-top <var>title</var></samp></span></dt> +<dd><p>Set the y position for the top of the window (default is a centered window). +</p></dd> +<dt><span><samp>-loop <var>number</var></samp></span></dt> +<dd><p>Loops movie playback <number> times. 0 means forever. +</p></dd> +<dt><span><samp>-showmode <var>mode</var></samp></span></dt> +<dd><p>Set the show mode to use. +Available values for <var>mode</var> are: +</p><dl compact="compact"> +<dt><span>‘<samp>0, video</samp>’</span></dt> +<dd><p>show video +</p></dd> +<dt><span>‘<samp>1, waves</samp>’</span></dt> +<dd><p>show audio waves +</p></dd> +<dt><span>‘<samp>2, rdft</samp>’</span></dt> +<dd><p>show audio frequency band using RDFT ((Inverse) Real Discrete Fourier Transform) +</p></dd> +</dl> + +<p>Default value is "video", if video is not present or cannot be played +"rdft" is automatically selected. +</p> +<p>You can interactively cycle through the available show modes by +pressing the key <tt class="key">w</tt>. +</p> +</dd> +<dt><span><samp>-vf <var>filtergraph</var></samp></span></dt> +<dd><p>Create the filtergraph specified by <var>filtergraph</var> and use it to +filter the video stream. +</p> +<p><var>filtergraph</var> is a description of the filtergraph to apply to +the stream, and must have a single video input and a single video +output. In the filtergraph, the input is associated to the label +<code>in</code>, and the output to the label <code>out</code>. See the +ffmpeg-filters manual for more information about the filtergraph +syntax. +</p> +<p>You can specify this parameter multiple times and cycle through the specified +filtergraphs along with the show modes by pressing the key <tt class="key">w</tt>. +</p> +</dd> +<dt><span><samp>-af <var>filtergraph</var></samp></span></dt> +<dd><p><var>filtergraph</var> is a description of the filtergraph to apply to +the input audio. +Use the option "-filters" to show all the available filters (including +sources and sinks). +</p> +</dd> +<dt><span><samp>-i <var>input_url</var></samp></span></dt> +<dd><p>Read <var>input_url</var>. +</p></dd> +</dl> + +<a name="Advanced-options"></a> +<h3 class="section">3.5 Advanced options<span class="pull-right"><a class="anchor hidden-xs" href="#Advanced-options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Advanced-options" aria-hidden="true">TOC</a></span></h3> +<dl compact="compact"> +<dt><span><samp>-stats</samp></span></dt> +<dd><p>Print several playback statistics, in particular show the stream +duration, the codec parameters, the current position in the stream and +the audio/video synchronisation drift. It is shown by default, unless the +log level is lower than <code>info</code>. Its display can be forced by manually +specifying this option. To disable it, you need to specify <code>-nostats</code>. +</p> +</dd> +<dt><span><samp>-fast</samp></span></dt> +<dd><p>Non-spec-compliant optimizations. +</p></dd> +<dt><span><samp>-genpts</samp></span></dt> +<dd><p>Generate pts. +</p></dd> +<dt><span><samp>-sync <var>type</var></samp></span></dt> +<dd><p>Set the master clock to audio (<code>type=audio</code>), video +(<code>type=video</code>) or external (<code>type=ext</code>). Default is audio. The +master clock is used to control audio-video synchronization. Most media +players use audio as master clock, but in some cases (streaming or high +quality broadcast) it is necessary to change that. This option is mainly +used for debugging purposes. +</p></dd> +<dt><span><samp>-ast <var>audio_stream_specifier</var></samp></span></dt> +<dd><p>Select the desired audio stream using the given stream specifier. The stream +specifiers are described in the <a href="#Stream-specifiers">Stream specifiers</a> chapter. If this option +is not specified, the "best" audio stream is selected in the program of the +already selected video stream. +</p></dd> +<dt><span><samp>-vst <var>video_stream_specifier</var></samp></span></dt> +<dd><p>Select the desired video stream using the given stream specifier. The stream +specifiers are described in the <a href="#Stream-specifiers">Stream specifiers</a> chapter. If this option +is not specified, the "best" video stream is selected. +</p></dd> +<dt><span><samp>-sst <var>subtitle_stream_specifier</var></samp></span></dt> +<dd><p>Select the desired subtitle stream using the given stream specifier. The stream +specifiers are described in the <a href="#Stream-specifiers">Stream specifiers</a> chapter. If this option +is not specified, the "best" subtitle stream is selected in the program of the +already selected video or audio stream. +</p></dd> +<dt><span><samp>-autoexit</samp></span></dt> +<dd><p>Exit when video is done playing. +</p></dd> +<dt><span><samp>-exitonkeydown</samp></span></dt> +<dd><p>Exit if any key is pressed. +</p></dd> +<dt><span><samp>-exitonmousedown</samp></span></dt> +<dd><p>Exit if any mouse button is pressed. +</p> +</dd> +<dt><span><samp>-codec:<var>media_specifier</var> <var>codec_name</var></samp></span></dt> +<dd><p>Force a specific decoder implementation for the stream identified by +<var>media_specifier</var>, which can assume the values <code>a</code> (audio), +<code>v</code> (video), and <code>s</code> subtitle. +</p> +</dd> +<dt><span><samp>-acodec <var>codec_name</var></samp></span></dt> +<dd><p>Force a specific audio decoder. +</p> +</dd> +<dt><span><samp>-vcodec <var>codec_name</var></samp></span></dt> +<dd><p>Force a specific video decoder. +</p> +</dd> +<dt><span><samp>-scodec <var>codec_name</var></samp></span></dt> +<dd><p>Force a specific subtitle decoder. +</p> +</dd> +<dt><span><samp>-autorotate</samp></span></dt> +<dd><p>Automatically rotate the video according to file metadata. Enabled by +default, use <samp>-noautorotate</samp> to disable it. +</p> +</dd> +<dt><span><samp>-framedrop</samp></span></dt> +<dd><p>Drop video frames if video is out of sync. Enabled by default if the master +clock is not set to video. Use this option to enable frame dropping for all +master clock sources, use <samp>-noframedrop</samp> to disable it. +</p> +</dd> +<dt><span><samp>-infbuf</samp></span></dt> +<dd><p>Do not limit the input buffer size, read as much data as possible from the +input as soon as possible. Enabled by default for realtime streams, where data +may be dropped if not read in time. Use this option to enable infinite buffers +for all inputs, use <samp>-noinfbuf</samp> to disable it. +</p> +</dd> +<dt><span><samp>-filter_threads <var>nb_threads</var></samp></span></dt> +<dd><p>Defines how many threads are used to process a filter pipeline. Each pipeline +will produce a thread pool with this many threads available for parallel +processing. The default is 0 which means that the thread count will be +determined by the number of available CPUs. +</p> +</dd> +</dl> + +<a name="While-playing"></a> +<h3 class="section">3.6 While playing<span class="pull-right"><a class="anchor hidden-xs" href="#While-playing" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-While-playing" aria-hidden="true">TOC</a></span></h3> + +<dl compact="compact"> +<dt><span><tt class="key">q, ESC</tt></span></dt> +<dd><p>Quit. +</p> +</dd> +<dt><span><tt class="key">f</tt></span></dt> +<dd><p>Toggle full screen. +</p> +</dd> +<dt><span><tt class="key">p, SPC</tt></span></dt> +<dd><p>Pause. +</p> +</dd> +<dt><span><tt class="key">m</tt></span></dt> +<dd><p>Toggle mute. +</p> +</dd> +<dt><span><tt class="key">9, 0</tt></span></dt> +<dt><span><tt class="key">/, *</tt></span></dt> +<dd><p>Decrease and increase volume respectively. +</p> +</dd> +<dt><span><tt class="key">a</tt></span></dt> +<dd><p>Cycle audio channel in the current program. +</p> +</dd> +<dt><span><tt class="key">v</tt></span></dt> +<dd><p>Cycle video channel. +</p> +</dd> +<dt><span><tt class="key">t</tt></span></dt> +<dd><p>Cycle subtitle channel in the current program. +</p> +</dd> +<dt><span><tt class="key">c</tt></span></dt> +<dd><p>Cycle program. +</p> +</dd> +<dt><span><tt class="key">w</tt></span></dt> +<dd><p>Cycle video filters or show modes. +</p> +</dd> +<dt><span><tt class="key">s</tt></span></dt> +<dd><p>Step to the next frame. +</p> +<p>Pause if the stream is not already paused, step to the next video +frame, and pause. +</p> +</dd> +<dt><span><tt class="key">left/right</tt></span></dt> +<dd><p>Seek backward/forward 10 seconds. +</p> +</dd> +<dt><span><tt class="key">down/up</tt></span></dt> +<dd><p>Seek backward/forward 1 minute. +</p> +</dd> +<dt><span><tt class="key">page down/page up</tt></span></dt> +<dd><p>Seek to the previous/next chapter. +or if there are no chapters +Seek backward/forward 10 minutes. +</p> +</dd> +<dt><span><tt class="key">right mouse click</tt></span></dt> +<dd><p>Seek to percentage in file corresponding to fraction of width. +</p> +</dd> +<dt><span><tt class="key">left mouse double-click</tt></span></dt> +<dd><p>Toggle full screen. +</p> +</dd> +</dl> + + + +<a name="See-Also"></a> +<h2 class="chapter">4 See Also<span class="pull-right"><a class="anchor hidden-xs" href="#See-Also" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-See-Also" aria-hidden="true">TOC</a></span></h2> + +<p><a href="ffplay-all.html">ffmpeg-all</a>, +<a href="ffmpeg.html">ffmpeg</a>, <a href="ffprobe.html">ffprobe</a>, +<a href="ffmpeg-utils.html">ffmpeg-utils</a>, +<a href="ffmpeg-scaler.html">ffmpeg-scaler</a>, +<a href="ffmpeg-resampler.html">ffmpeg-resampler</a>, +<a href="ffmpeg-codecs.html">ffmpeg-codecs</a>, +<a href="ffmpeg-bitstream-filters.html">ffmpeg-bitstream-filters</a>, +<a href="ffmpeg-formats.html">ffmpeg-formats</a>, +<a href="ffmpeg-devices.html">ffmpeg-devices</a>, +<a href="ffmpeg-protocols.html">ffmpeg-protocols</a>, +<a href="ffmpeg-filters.html">ffmpeg-filters</a> +</p> + +<a name="Authors"></a> +<h2 class="chapter">5 Authors<span class="pull-right"><a class="anchor hidden-xs" href="#Authors" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Authors" aria-hidden="true">TOC</a></span></h2> + +<p>The FFmpeg developers. +</p> +<p>For details about the authorship, see the Git history of the project +(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command +<code>git log</code> in the FFmpeg source directory, or browsing the +online repository at <a href="http://source.ffmpeg.org">http://source.ffmpeg.org</a>. +</p> +<p>Maintainers for the specific components are listed in the file +<samp>MAINTAINERS</samp> in the source code tree. +</p> + + <p style="font-size: small;"> + This document was generated using <a href="https://www.gnu.org/software/texinfo/"><em>makeinfo</em></a>. + </p> + </div> + </body> +</html> |