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| ffplay Documentation |
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| <div class="element-contents" id="SEC_Contents"> |
| <h2 class="contents-heading">Table of Contents</h2> |
|
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| <div class="contents"> |
|
|
| <ul class="toc-numbered-mark"> |
| <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="toc-numbered-mark"> |
| <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 class="var">options</var>] [<samp class="file">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> |
| <p>Options that take arguments support a special syntax where the argument given on |
| the command line is interpreted as a path to the file from which the actual |
| argument value is loaded. To use this feature, add a forward slash ’/’ |
| immediately before the option name (after the leading dash). E.g. |
| </p><div class="example"> |
| <pre class="example-preformatted">ffmpeg -i INPUT -/filter:v filter.script OUTPUT |
| </pre></div> |
| <p>will load a filtergraph description from the file named <samp class="file">filter.script</samp>. |
| </p> |
| <a class="anchor" id="Stream-specifiers"></a><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 class="code">-codec:a:1 ac3</code> contains the |
| <code class="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 class="code">-b:a 128k</code> matches all audio |
| streams. |
| </p> |
| <p>An empty stream specifier matches all streams. For example, <code class="code">-codec copy</code> |
| or <code class="code">-codec: copy</code> would copy all the streams without reencoding. |
| </p> |
| <p>Possible forms of stream specifiers are: |
| </p><dl class="table"> |
| <dt><samp class="option"><var class="var">stream_index</var></samp></dt> |
| <dd><p>Matches the stream with this index. E.g. <code class="code">-threads:1 4</code> would set the |
| thread count for the second stream to 4. If <var class="var">stream_index</var> is used as an |
| additional stream specifier (see below), then it selects stream number |
| <var class="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 stream group |
| specifier or program ID is also specified. In this case it is based on the |
| ordering of the streams in the group or program. |
| </p></dd> |
| <dt><samp class="option"><var class="var">stream_type</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt> |
| <dd><p><var class="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 class="var">additional_stream_specifier</var> is used, then |
| it matches streams which both have this type and match the |
| <var class="var">additional_stream_specifier</var>. Otherwise, it matches all streams of the |
| specified type. |
| </p></dd> |
| <dt><samp class="option">g:<var class="var">group_specifier</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt> |
| <dd><p>Matches streams which are in the group with the specifier <var class="var">group_specifier</var>. |
| if <var class="var">additional_stream_specifier</var> is used, then it matches streams which both |
| are part of the group and match the <var class="var">additional_stream_specifier</var>. |
| <var class="var">group_specifier</var> may be one of the following: |
| </p><dl class="table"> |
| <dt><samp class="option"><var class="var">group_index</var></samp></dt> |
| <dd><p>Match the stream with this group index. |
| </p></dd> |
| <dt><samp class="option">#<var class="var">group_id</var> or i:<var class="var">group_id</var></samp></dt> |
| <dd><p>Match the stream with this group id. |
| </p></dd> |
| </dl> |
| </dd> |
| <dt><samp class="option">p:<var class="var">program_id</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt> |
| <dd><p>Matches streams which are in the program with the id <var class="var">program_id</var>. If |
| <var class="var">additional_stream_specifier</var> is used, then it matches streams which both |
| are part of the program and match the <var class="var">additional_stream_specifier</var>. |
| </p> |
| </dd> |
| <dt><samp class="option">#<var class="var">stream_id</var> or i:<var class="var">stream_id</var></samp></dt> |
| <dd><p>Match the stream by stream id (e.g. PID in MPEG-TS container). |
| </p></dd> |
| <dt><samp class="option">m:<var class="var">key</var>[:<var class="var">value</var>]</samp></dt> |
| <dd><p>Matches streams with the metadata tag <var class="var">key</var> having the specified value. If |
| <var class="var">value</var> is not given, matches streams that contain the given tag with any |
| value. The colon character ’:’ in <var class="var">key</var> or <var class="var">value</var> needs to be |
| backslash-escaped. |
| </p></dd> |
| <dt><samp class="option">disp:<var class="var">dispositions</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt> |
| <dd><p>Matches streams with the given disposition(s). <var class="var">dispositions</var> is a list of |
| one or more dispositions (as printed by the <samp class="option">-dispositions</samp> option) |
| joined with ’+’. |
| </p></dd> |
| <dt><samp class="option">u</samp></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 class="command">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 class="table"> |
| <dt><samp class="option">-L, -license</samp></dt> |
| <dd><p>Show license. |
| </p> |
| </dd> |
| <dt><samp class="option">-h, -?, -help, --help [<var class="var">arg</var>]</samp></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 class="var">arg</var> are: |
| </p><dl class="table"> |
| <dt><samp class="option">long</samp></dt> |
| <dd><p>Print advanced tool options in addition to the basic tool options. |
| </p> |
| </dd> |
| <dt><samp class="option">full</samp></dt> |
| <dd><p>Print complete list of options, including shared and private options |
| for encoders, decoders, demuxers, muxers, filters, etc. |
| </p> |
| </dd> |
| <dt><samp class="option">decoder=<var class="var">decoder_name</var></samp></dt> |
| <dd><p>Print detailed information about the decoder named <var class="var">decoder_name</var>. Use the |
| <samp class="option">-decoders</samp> option to get a list of all decoders. |
| </p> |
| </dd> |
| <dt><samp class="option">encoder=<var class="var">encoder_name</var></samp></dt> |
| <dd><p>Print detailed information about the encoder named <var class="var">encoder_name</var>. Use the |
| <samp class="option">-encoders</samp> option to get a list of all encoders. |
| </p> |
| </dd> |
| <dt><samp class="option">demuxer=<var class="var">demuxer_name</var></samp></dt> |
| <dd><p>Print detailed information about the demuxer named <var class="var">demuxer_name</var>. Use the |
| <samp class="option">-formats</samp> option to get a list of all demuxers and muxers. |
| </p> |
| </dd> |
| <dt><samp class="option">muxer=<var class="var">muxer_name</var></samp></dt> |
| <dd><p>Print detailed information about the muxer named <var class="var">muxer_name</var>. Use the |
| <samp class="option">-formats</samp> option to get a list of all muxers and demuxers. |
| </p> |
| </dd> |
| <dt><samp class="option">filter=<var class="var">filter_name</var></samp></dt> |
| <dd><p>Print detailed information about the filter named <var class="var">filter_name</var>. Use the |
| <samp class="option">-filters</samp> option to get a list of all filters. |
| </p> |
| </dd> |
| <dt><samp class="option">bsf=<var class="var">bitstream_filter_name</var></samp></dt> |
| <dd><p>Print detailed information about the bitstream filter named <var class="var">bitstream_filter_name</var>. |
| Use the <samp class="option">-bsfs</samp> option to get a list of all bitstream filters. |
| </p> |
| </dd> |
| <dt><samp class="option">protocol=<var class="var">protocol_name</var></samp></dt> |
| <dd><p>Print detailed information about the protocol named <var class="var">protocol_name</var>. |
| Use the <samp class="option">-protocols</samp> option to get a list of all protocols. |
| </p></dd> |
| </dl> |
|
|
| </dd> |
| <dt><samp class="option">-version</samp></dt> |
| <dd><p>Show version. |
| </p> |
| </dd> |
| <dt><samp class="option">-buildconf</samp></dt> |
| <dd><p>Show the build configuration, one option per line. |
| </p> |
| </dd> |
| <dt><samp class="option">-formats</samp></dt> |
| <dd><p>Show available formats (including devices). |
| </p> |
| </dd> |
| <dt><samp class="option">-demuxers</samp></dt> |
| <dd><p>Show available demuxers. |
| </p> |
| </dd> |
| <dt><samp class="option">-muxers</samp></dt> |
| <dd><p>Show available muxers. |
| </p> |
| </dd> |
| <dt><samp class="option">-devices</samp></dt> |
| <dd><p>Show available devices. |
| </p> |
| </dd> |
| <dt><samp class="option">-codecs</samp></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><samp class="option">-decoders</samp></dt> |
| <dd><p>Show available decoders. |
| </p> |
| </dd> |
| <dt><samp class="option">-encoders</samp></dt> |
| <dd><p>Show all available encoders. |
| </p> |
| </dd> |
| <dt><samp class="option">-bsfs</samp></dt> |
| <dd><p>Show available bitstream filters. |
| </p> |
| </dd> |
| <dt><samp class="option">-protocols</samp></dt> |
| <dd><p>Show available protocols. |
| </p> |
| </dd> |
| <dt><samp class="option">-filters</samp></dt> |
| <dd><p>Show available libavfilter filters. |
| </p> |
| </dd> |
| <dt><samp class="option">-pix_fmts</samp></dt> |
| <dd><p>Show available pixel formats. |
| </p> |
| </dd> |
| <dt><samp class="option">-sample_fmts</samp></dt> |
| <dd><p>Show available sample formats. |
| </p> |
| </dd> |
| <dt><samp class="option">-layouts</samp></dt> |
| <dd><p>Show channel names and standard channel layouts. |
| </p> |
| </dd> |
| <dt><samp class="option">-dispositions</samp></dt> |
| <dd><p>Show stream dispositions. |
| </p> |
| </dd> |
| <dt><samp class="option">-colors</samp></dt> |
| <dd><p>Show recognized color names. |
| </p> |
| </dd> |
| <dt><samp class="option">-sources <var class="var">device</var>[,<var class="var">opt1</var>=<var class="var">val1</var>[,<var class="var">opt2</var>=<var class="var">val2</var>]...]</samp></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-preformatted">ffmpeg -sources pulse,server=192.168.0.4 |
| </pre></div> |
|
|
| </dd> |
| <dt><samp class="option">-sinks <var class="var">device</var>[,<var class="var">opt1</var>=<var class="var">val1</var>[,<var class="var">opt2</var>=<var class="var">val2</var>]...]</samp></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-preformatted">ffmpeg -sinks pulse,server=192.168.0.4 |
| </pre></div> |
|
|
| </dd> |
| <dt><samp class="option">-loglevel [<var class="var">flags</var>+]<var class="var">loglevel</var> | -v [<var class="var">flags</var>+]<var class="var">loglevel</var></samp></dt> |
| <dd><p>Set logging level and flags used by the library. |
| </p> |
| <p>The optional <var class="var">flags</var> prefix can consist of the following values: |
| </p><dl class="table"> |
| <dt>‘<samp class="samp">repeat</samp>’</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>‘<samp class="samp">level</samp>’</dt> |
| <dd><p>Indicates that log output should add a <code class="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> |
| <dt>‘<samp class="samp">time</samp>’</dt> |
| <dd><p>Indicates that log lines should be prefixed with time information. |
| </p></dd> |
| <dt>‘<samp class="samp">datetime</samp>’</dt> |
| <dd><p>Indicates that log lines should be prefixed with date and time information. |
| </p></dd> |
| </dl> |
| <p>Flags can also be used alone by adding a ’+’/’-’ prefix to set/reset a single |
| flag without affecting other <var class="var">flags</var> or changing <var class="var">loglevel</var>. When |
| setting both <var class="var">flags</var> and <var class="var">loglevel</var>, a ’+’ separator is expected |
| between the last <var class="var">flags</var> value and before <var class="var">loglevel</var>. |
| </p> |
| <p><var class="var">loglevel</var> is a string or a number containing one of the following values: |
| </p><dl class="table"> |
| <dt>‘<samp class="samp">quiet, -8</samp>’</dt> |
| <dd><p>Show nothing at all; be silent. |
| </p></dd> |
| <dt>‘<samp class="samp">panic, 0</samp>’</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>‘<samp class="samp">fatal, 8</samp>’</dt> |
| <dd><p>Only show fatal errors. These are errors after which the process absolutely |
| cannot continue. |
| </p></dd> |
| <dt>‘<samp class="samp">error, 16</samp>’</dt> |
| <dd><p>Show all errors, including ones which can be recovered from. |
| </p></dd> |
| <dt>‘<samp class="samp">warning, 24</samp>’</dt> |
| <dd><p>Show all warnings and errors. Any message related to possibly |
| incorrect or unexpected events will be shown. |
| </p></dd> |
| <dt>‘<samp class="samp">info, 32</samp>’</dt> |
| <dd><p>Show informative messages during processing. This is in addition to |
| warnings and errors. This is the default value. |
| </p></dd> |
| <dt>‘<samp class="samp">verbose, 40</samp>’</dt> |
| <dd><p>Same as <code class="code">info</code>, except more verbose. |
| </p></dd> |
| <dt>‘<samp class="samp">debug, 48</samp>’</dt> |
| <dd><p>Show everything, including debugging information. |
| </p></dd> |
| <dt>‘<samp class="samp">trace, 56</samp>’</dt> |
| </dl> |
|
|
| <p>For example to enable repeated log output, add the <code class="code">level</code> prefix, and set |
| <var class="var">loglevel</var> to <code class="code">verbose</code>: |
| </p><div class="example"> |
| <pre class="example-preformatted">ffmpeg -loglevel repeat+level+verbose -i input output |
| </pre></div> |
| <p>Another example that enables repeated log output without affecting current |
| state of <code class="code">level</code> prefix flag or <var class="var">loglevel</var>: |
| </p><div class="example"> |
| <pre class="example-preformatted">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 class="env">AV_LOG_FORCE_NOCOLOR</code>, or can be forced setting |
| the environment variable <code class="env">AV_LOG_FORCE_COLOR</code>. |
| </p> |
| </dd> |
| <dt><samp class="option">-report</samp></dt> |
| <dd><p>Dump full command line and log output to a file named |
| <code class="code"><var class="var">program</var>-<var class="var">YYYYMMDD</var>-<var class="var">HHMMSS</var>.log</code> in the current |
| directory. |
| This file can be useful for bug reports. |
| It also implies <code class="code">-loglevel debug</code>. |
| </p> |
| <p>Setting the environment variable <code class="env">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 class="table"> |
| <dt><samp class="option">file</samp></dt> |
| <dd><p>set the file name to use for the report; <code class="code">%p</code> is expanded to the name |
| of the program, <code class="code">%t</code> is expanded to a timestamp, <code class="code">%%</code> is expanded |
| to a plain <code class="code">%</code> |
| </p></dd> |
| <dt><samp class="option">level</samp></dt> |
| <dd><p>set the log verbosity level using a numerical value (see <code class="code">-loglevel</code>). |
| </p></dd> |
| </dl> |
|
|
| <p>For example, to output a report to a file named <samp class="file">ffreport.log</samp> |
| using a log level of <code class="code">32</code> (alias for log level <code class="code">info</code>): |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">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><samp class="option">-hide_banner</samp></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><samp class="option">-cpuflags flags (<em class="emph">global</em>)</samp></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-preformatted">ffmpeg -cpuflags -sse+mmx ... |
| ffmpeg -cpuflags mmx ... |
| ffmpeg -cpuflags 0 ... |
| </pre></div> |
| <p>Possible flags for this option are: |
| </p><dl class="table"> |
| <dt>‘<samp class="samp">x86</samp>’</dt> |
| <dd><dl class="table"> |
| <dt>‘<samp class="samp">mmx</samp>’</dt> |
| <dt>‘<samp class="samp">mmxext</samp>’</dt> |
| <dt>‘<samp class="samp">sse</samp>’</dt> |
| <dt>‘<samp class="samp">sse2</samp>’</dt> |
| <dt>‘<samp class="samp">sse2slow</samp>’</dt> |
| <dt>‘<samp class="samp">sse3</samp>’</dt> |
| <dt>‘<samp class="samp">sse3slow</samp>’</dt> |
| <dt>‘<samp class="samp">ssse3</samp>’</dt> |
| <dt>‘<samp class="samp">atom</samp>’</dt> |
| <dt>‘<samp class="samp">sse4.1</samp>’</dt> |
| <dt>‘<samp class="samp">sse4.2</samp>’</dt> |
| <dt>‘<samp class="samp">avx</samp>’</dt> |
| <dt>‘<samp class="samp">avx2</samp>’</dt> |
| <dt>‘<samp class="samp">xop</samp>’</dt> |
| <dt>‘<samp class="samp">fma3</samp>’</dt> |
| <dt>‘<samp class="samp">fma4</samp>’</dt> |
| <dt>‘<samp class="samp">3dnow</samp>’</dt> |
| <dt>‘<samp class="samp">3dnowext</samp>’</dt> |
| <dt>‘<samp class="samp">bmi1</samp>’</dt> |
| <dt>‘<samp class="samp">bmi2</samp>’</dt> |
| <dt>‘<samp class="samp">cmov</samp>’</dt> |
| </dl> |
| </dd> |
| <dt>‘<samp class="samp">ARM</samp>’</dt> |
| <dd><dl class="table"> |
| <dt>‘<samp class="samp">armv5te</samp>’</dt> |
| <dt>‘<samp class="samp">armv6</samp>’</dt> |
| <dt>‘<samp class="samp">armv6t2</samp>’</dt> |
| <dt>‘<samp class="samp">vfp</samp>’</dt> |
| <dt>‘<samp class="samp">vfpv3</samp>’</dt> |
| <dt>‘<samp class="samp">neon</samp>’</dt> |
| <dt>‘<samp class="samp">setend</samp>’</dt> |
| </dl> |
| </dd> |
| <dt>‘<samp class="samp">AArch64</samp>’</dt> |
| <dd><dl class="table"> |
| <dt>‘<samp class="samp">armv8</samp>’</dt> |
| <dt>‘<samp class="samp">vfp</samp>’</dt> |
| <dt>‘<samp class="samp">neon</samp>’</dt> |
| </dl> |
| </dd> |
| <dt>‘<samp class="samp">PowerPC</samp>’</dt> |
| <dd><dl class="table"> |
| <dt>‘<samp class="samp">altivec</samp>’</dt> |
| </dl> |
| </dd> |
| <dt>‘<samp class="samp">Specific Processors</samp>’</dt> |
| <dd><dl class="table"> |
| <dt>‘<samp class="samp">pentium2</samp>’</dt> |
| <dt>‘<samp class="samp">pentium3</samp>’</dt> |
| <dt>‘<samp class="samp">pentium4</samp>’</dt> |
| <dt>‘<samp class="samp">k6</samp>’</dt> |
| <dt>‘<samp class="samp">k62</samp>’</dt> |
| <dt>‘<samp class="samp">athlon</samp>’</dt> |
| <dt>‘<samp class="samp">athlonxp</samp>’</dt> |
| <dt>‘<samp class="samp">k8</samp>’</dt> |
| </dl> |
| </dd> |
| </dl> |
|
|
| </dd> |
| <dt><samp class="option">-cpucount <var class="var">count</var> (<em class="emph">global</em>)</samp></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-preformatted">ffmpeg -cpucount 2 |
| </pre></div> |
|
|
| </dd> |
| <dt><samp class="option">-max_alloc <var class="var">bytes</var></samp></dt> |
| <dd><p>Set the maximum size limit for allocating a block on the heap by ffmpeg’s |
| family of malloc functions. Exercise <strong class="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 class="option">-help</samp> option. They are separated into two categories: |
| </p><dl class="table"> |
| <dt><samp class="option">generic</samp></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><samp class="option">private</samp></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 class="option">id3v2_version</samp> private option of the MP3 |
| muxer: |
| </p><div class="example"> |
| <pre class="example-preformatted">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-preformatted">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 class="option">-nooption</samp> syntax cannot be used for boolean |
| AVOptions, use <samp class="option">-option 0</samp>/<samp class="option">-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 class="table"> |
| <dt><samp class="option">-x <var class="var">width</var></samp></dt> |
| <dd><p>Force displayed width. |
| </p></dd> |
| <dt><samp class="option">-y <var class="var">height</var></samp></dt> |
| <dd><p>Force displayed height. |
| </p></dd> |
| <dt><samp class="option">-fs</samp></dt> |
| <dd><p>Start in fullscreen mode. |
| </p></dd> |
| <dt><samp class="option">-an</samp></dt> |
| <dd><p>Disable audio. |
| </p></dd> |
| <dt><samp class="option">-vn</samp></dt> |
| <dd><p>Disable video. |
| </p></dd> |
| <dt><samp class="option">-sn</samp></dt> |
| <dd><p>Disable subtitles. |
| </p></dd> |
| <dt><samp class="option">-ss <var class="var">pos</var></samp></dt> |
| <dd><p>Seek to <var class="var">pos</var>. Note that in most formats it is not possible to seek |
| exactly, so <code class="command">ffplay</code> will seek to the nearest seek point to |
| <var class="var">pos</var>. |
| </p> |
| <p><var class="var">pos</var> must be a time duration specification, |
| see <a data-manual="ffmpeg-utils" href="ffmpeg-utils.html#time-duration-syntax">the Time duration section in the ffmpeg-utils(1) manual</a>. |
| </p></dd> |
| <dt><samp class="option">-t <var class="var">duration</var></samp></dt> |
| <dd><p>Play <var class="var">duration</var> seconds of audio/video. |
| </p> |
| <p><var class="var">duration</var> must be a time duration specification, |
| see <a data-manual="ffmpeg-utils" href="ffmpeg-utils.html#time-duration-syntax">the Time duration section in the ffmpeg-utils(1) manual</a>. |
| </p></dd> |
| <dt><samp class="option">-bytes</samp></dt> |
| <dd><p>Seek by bytes. |
| </p></dd> |
| <dt><samp class="option">-seek_interval</samp></dt> |
| <dd><p>Set custom interval, in seconds, for seeking using left/right keys. Default is 10 seconds. |
| </p></dd> |
| <dt><samp class="option">-nodisp</samp></dt> |
| <dd><p>Disable graphical display. |
| </p></dd> |
| <dt><samp class="option">-noborder</samp></dt> |
| <dd><p>Borderless window. |
| </p></dd> |
| <dt><samp class="option">-alwaysontop</samp></dt> |
| <dd><p>Window always on top. Available on: X11 with SDL >= 2.0.5, Windows SDL >= 2.0.6. |
| </p></dd> |
| <dt><samp class="option">-volume</samp></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><samp class="option">-f <var class="var">fmt</var></samp></dt> |
| <dd><p>Force format. |
| </p></dd> |
| <dt><samp class="option">-window_title <var class="var">title</var></samp></dt> |
| <dd><p>Set window title (default is the input filename). |
| </p></dd> |
| <dt><samp class="option">-left <var class="var">title</var></samp></dt> |
| <dd><p>Set the x position for the left of the window (default is a centered window). |
| </p></dd> |
| <dt><samp class="option">-top <var class="var">title</var></samp></dt> |
| <dd><p>Set the y position for the top of the window (default is a centered window). |
| </p></dd> |
| <dt><samp class="option">-loop <var class="var">number</var></samp></dt> |
| <dd><p>Loops movie playback <number> times. 0 means forever. |
| </p></dd> |
| <dt><samp class="option">-showmode <var class="var">mode</var></samp></dt> |
| <dd><p>Set the show mode to use. |
| Available values for <var class="var">mode</var> are: |
| </p><dl class="table"> |
| <dt>‘<samp class="samp">0, video</samp>’</dt> |
| <dd><p>show video |
| </p></dd> |
| <dt>‘<samp class="samp">1, waves</samp>’</dt> |
| <dd><p>show audio waves |
| </p></dd> |
| <dt>‘<samp class="samp">2, rdft</samp>’</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 <kbd class="key">w</kbd>. |
| </p> |
| </dd> |
| <dt><samp class="option">-vf <var class="var">filtergraph</var></samp></dt> |
| <dd><p>Create the filtergraph specified by <var class="var">filtergraph</var> and use it to |
| filter the video stream. |
| </p> |
| <p><var class="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 class="code">in</code>, and the output to the label <code class="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 <kbd class="key">w</kbd>. |
| </p> |
| </dd> |
| <dt><samp class="option">-af <var class="var">filtergraph</var></samp></dt> |
| <dd><p><var class="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><samp class="option">-i <var class="var">input_url</var></samp></dt> |
| <dd><p>Read <var class="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 class="table"> |
| <dt><samp class="option">-stats</samp></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 class="code">info</code>. Its display can be forced by manually |
| specifying this option. To disable it, you need to specify <code class="code">-nostats</code>. |
| </p> |
| </dd> |
| <dt><samp class="option">-fast</samp></dt> |
| <dd><p>Non-spec-compliant optimizations. |
| </p></dd> |
| <dt><samp class="option">-genpts</samp></dt> |
| <dd><p>Generate pts. |
| </p></dd> |
| <dt><samp class="option">-sync <var class="var">type</var></samp></dt> |
| <dd><p>Set the master clock to audio (<code class="code">type=audio</code>), video |
| (<code class="code">type=video</code>) or external (<code class="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><samp class="option">-ast <var class="var">audio_stream_specifier</var></samp></dt> |
| <dd><p>Select the desired audio stream using the given stream specifier. The stream |
| specifiers are described in the <a class="ref" 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><samp class="option">-vst <var class="var">video_stream_specifier</var></samp></dt> |
| <dd><p>Select the desired video stream using the given stream specifier. The stream |
| specifiers are described in the <a class="ref" href="#Stream-specifiers">Stream specifiers</a> chapter. If this option |
| is not specified, the "best" video stream is selected. |
| </p></dd> |
| <dt><samp class="option">-sst <var class="var">subtitle_stream_specifier</var></samp></dt> |
| <dd><p>Select the desired subtitle stream using the given stream specifier. The stream |
| specifiers are described in the <a class="ref" 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><samp class="option">-autoexit</samp></dt> |
| <dd><p>Exit when video is done playing. |
| </p></dd> |
| <dt><samp class="option">-exitonkeydown</samp></dt> |
| <dd><p>Exit if any key is pressed. |
| </p></dd> |
| <dt><samp class="option">-exitonmousedown</samp></dt> |
| <dd><p>Exit if any mouse button is pressed. |
| </p> |
| </dd> |
| <dt><samp class="option">-codec:<var class="var">media_specifier</var> <var class="var">codec_name</var></samp></dt> |
| <dd><p>Force a specific decoder implementation for the stream identified by |
| <var class="var">media_specifier</var>, which can assume the values <code class="code">a</code> (audio), |
| <code class="code">v</code> (video), and <code class="code">s</code> subtitle. |
| </p> |
| </dd> |
| <dt><samp class="option">-acodec <var class="var">codec_name</var></samp></dt> |
| <dd><p>Force a specific audio decoder. |
| </p> |
| </dd> |
| <dt><samp class="option">-vcodec <var class="var">codec_name</var></samp></dt> |
| <dd><p>Force a specific video decoder. |
| </p> |
| </dd> |
| <dt><samp class="option">-scodec <var class="var">codec_name</var></samp></dt> |
| <dd><p>Force a specific subtitle decoder. |
| </p> |
| </dd> |
| <dt><samp class="option">-autorotate</samp></dt> |
| <dd><p>Automatically rotate the video according to file metadata. Enabled by |
| default, use <samp class="option">-noautorotate</samp> to disable it. |
| </p> |
| </dd> |
| <dt><samp class="option">-framedrop</samp></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 class="option">-noframedrop</samp> to disable it. |
| </p> |
| </dd> |
| <dt><samp class="option">-infbuf</samp></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 class="option">-noinfbuf</samp> to disable it. |
| </p> |
| </dd> |
| <dt><samp class="option">-filter_threads <var class="var">nb_threads</var></samp></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> |
| <dt><samp class="option">-enable_vulkan</samp></dt> |
| <dd><p>Use vulkan renderer rather than SDL builtin renderer. Depends on libplacebo. |
| </p> |
| </dd> |
| <dt><samp class="option">-vulkan_params</samp></dt> |
| <dd> |
| <p>Vulkan configuration using a list of <var class="var">key</var>=<var class="var">value</var> pairs separated by |
| ":". |
| </p> |
| </dd> |
| <dt><samp class="option">-hwaccel</samp></dt> |
| <dd><p>Use HW accelerated decoding. Enable this option will enable vulkan renderer |
| automatically. |
| </p> |
| </dd> |
| <dt><samp class="option">-video_bg <var class="var">pattern</var></samp></dt> |
| <dd><p>Set the video background pattern used for transparent videos. For solid color |
| patterns you can use the color name or color code as specified in the |
| <a data-manual="ffmpeg-utils" href="ffmpeg-utils.html#color-syntax">Color section in the ffmpeg-utils(1) manual</a>. |
| You can also use the special <code class="code">tiles</code> keyword for a checker board style |
| pattern. This is also the default. The <code class="code">none</code> pattern does rendering |
| without alpha blending effectively ignoring alpha channel. |
| </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 class="table"> |
| <dt><kbd class="key">q, ESC</kbd></dt> |
| <dd><p>Quit. |
| </p> |
| </dd> |
| <dt><kbd class="key">f</kbd></dt> |
| <dd><p>Toggle full screen. |
| </p> |
| </dd> |
| <dt><kbd class="key">p, SPC</kbd></dt> |
| <dd><p>Pause. |
| </p> |
| </dd> |
| <dt><kbd class="key">m</kbd></dt> |
| <dd><p>Toggle mute. |
| </p> |
| </dd> |
| <dt><kbd class="key">9, 0</kbd></dt> |
| <dt><kbd class="key">/, *</kbd></dt> |
| <dd><p>Decrease and increase volume respectively. |
| </p> |
| </dd> |
| <dt><kbd class="key">a</kbd></dt> |
| <dd><p>Cycle audio channel in the current program. |
| </p> |
| </dd> |
| <dt><kbd class="key">v</kbd></dt> |
| <dd><p>Cycle video channel. |
| </p> |
| </dd> |
| <dt><kbd class="key">t</kbd></dt> |
| <dd><p>Cycle subtitle channel in the current program. |
| </p> |
| </dd> |
| <dt><kbd class="key">c</kbd></dt> |
| <dd><p>Cycle program. |
| </p> |
| </dd> |
| <dt><kbd class="key">w</kbd></dt> |
| <dd><p>Cycle video filters or show modes. |
| </p> |
| </dd> |
| <dt><kbd class="key">s</kbd></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><kbd class="key">left/right</kbd></dt> |
| <dd><p>Seek backward/forward by 10 seconds or a custom interval if -seek_interval is set. |
| </p> |
| </dd> |
| <dt><kbd class="key">down/up</kbd></dt> |
| <dd><p>Seek backward/forward 1 minute. |
| </p> |
| </dd> |
| <dt><kbd class="key">page down/page up</kbd></dt> |
| <dd><p>Seek to previous/next chapter or backward/forward 10 minutes if no chapters. |
| </p> |
| </dd> |
| <dt><kbd class="key">right mouse click</kbd></dt> |
| <dd><p>Seek to percentage in file corresponding to fraction of width. |
| </p> |
| </dd> |
| <dt><kbd class="key">left mouse double-click</kbd></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 class="url" href="ffplay-all.html">ffmpeg-all</a>, |
| <a class="url" href="ffmpeg.html">ffmpeg</a>, <a class="url" href="ffprobe.html">ffprobe</a>, |
| <a class="url" href="ffmpeg-utils.html">ffmpeg-utils</a>, |
| <a class="url" href="ffmpeg-scaler.html">ffmpeg-scaler</a>, |
| <a class="url" href="ffmpeg-resampler.html">ffmpeg-resampler</a>, |
| <a class="url" href="ffmpeg-codecs.html">ffmpeg-codecs</a>, |
| <a class="url" href="ffmpeg-bitstream-filters.html">ffmpeg-bitstream-filters</a>, |
| <a class="url" href="ffmpeg-formats.html">ffmpeg-formats</a>, |
| <a class="url" href="ffmpeg-devices.html">ffmpeg-devices</a>, |
| <a class="url" href="ffmpeg-protocols.html">ffmpeg-protocols</a>, |
| <a class="url" 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 |
| (https://git.ffmpeg.org/ffmpeg), e.g. by typing the command |
| <code class="command">git log</code> in the FFmpeg source directory, or browsing the |
| online repository at <a class="url" href="https://git.ffmpeg.org/ffmpeg">https://git.ffmpeg.org/ffmpeg</a>. |
| </p> |
| <p>Maintainers for the specific components are listed in the file |
| <samp class="file">MAINTAINERS</samp> in the source code tree. |
| </p> |
|
|
| <p style="font-size: small;"> |
| This document was generated using <a class="uref" href="https://www.gnu.org/software/texinfo/"><em class="emph">makeinfo</em></a>. |
| </p> |
| </div> |
| </body> |
| </html> |
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