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832 lines
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832 lines
32 KiB
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<title>FFmpeg documentation</title>
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<meta name="description" content="ffplay Documentation: ">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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</head>
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<body>
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<div class="container">
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<h1 class="titlefont">ffplay Documentation</h1>
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<hr>
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<a name="SEC_Top"></a>
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<a name="SEC_Contents"></a>
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<h1>Table of Contents</h1>
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<div class="contents">
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<ul class="no-bullet">
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<li><a name="toc-Synopsis" href="#Synopsis">1 Synopsis</a></li>
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<li><a name="toc-Description" href="#Description">2 Description</a></li>
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<li><a name="toc-Options" href="#Options">3 Options</a>
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<ul class="no-bullet">
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<li><a name="toc-Stream-specifiers-1" href="#Stream-specifiers-1">3.1 Stream specifiers</a></li>
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<li><a name="toc-Generic-options" href="#Generic-options">3.2 Generic options</a></li>
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<li><a name="toc-AVOptions" href="#AVOptions">3.3 AVOptions</a></li>
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<li><a name="toc-Main-options" href="#Main-options">3.4 Main options</a></li>
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<li><a name="toc-Advanced-options" href="#Advanced-options">3.5 Advanced options</a></li>
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<li><a name="toc-While-playing" href="#While-playing">3.6 While playing</a></li>
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</ul></li>
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<li><a name="toc-See-Also" href="#See-Also">4 See Also</a></li>
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<li><a name="toc-Authors" href="#Authors">5 Authors</a></li>
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</ul>
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</div>
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<hr size="6">
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<a name="Synopsis"></a>
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<h1 class="chapter"><a href="ffplay.html#toc-Synopsis">1 Synopsis</a></h1>
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<p>ffplay [<var>options</var>] [‘<tt>input_url</tt>’]
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</p>
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<a name="Description"></a>
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<h1 class="chapter"><a href="ffplay.html#toc-Description">2 Description</a></h1>
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<p>FFplay is a very simple and portable media player using the FFmpeg
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libraries and the SDL library. It is mostly used as a testbed for the
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various FFmpeg APIs.
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</p>
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<a name="Options"></a>
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<h1 class="chapter"><a href="ffplay.html#toc-Options">3 Options</a></h1>
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<p>All the numerical options, if not specified otherwise, accept a string
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representing a number as input, which may be followed by one of the SI
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unit prefixes, for example: ’K’, ’M’, or ’G’.
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</p>
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<p>If ’i’ is appended to the SI unit prefix, the complete prefix will be
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interpreted as a unit prefix for binary multiples, which are based on
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powers of 1024 instead of powers of 1000. Appending ’B’ to the SI unit
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prefix multiplies the value by 8. This allows using, for example:
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’KB’, ’MiB’, ’G’ and ’B’ as number suffixes.
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</p>
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<p>Options which do not take arguments are boolean options, and set the
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corresponding value to true. They can be set to false by prefixing
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the option name with "no". For example using "-nofoo"
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will set the boolean option with name "foo" to false.
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</p>
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<p><a name="Stream-specifiers"></a>
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</p><a name="Stream-specifiers-1"></a>
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<h2 class="section"><a href="ffplay.html#toc-Stream-specifiers-1">3.1 Stream specifiers</a></h2>
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<p>Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers
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are used to precisely specify which stream(s) a given option belongs to.
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</p>
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<p>A stream specifier is a string generally appended to the option name and
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separated from it by a colon. E.g. <code>-codec:a:1 ac3</code> contains the
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<code>a:1</code> stream specifier, which matches the second audio stream. Therefore, it
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would select the ac3 codec for the second audio stream.
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</p>
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<p>A stream specifier can match several streams, so that the option is applied to all
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of them. E.g. the stream specifier in <code>-b:a 128k</code> matches all audio
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streams.
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</p>
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<p>An empty stream specifier matches all streams. For example, <code>-codec copy</code>
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or <code>-codec: copy</code> would copy all the streams without reencoding.
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</p>
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<p>Possible forms of stream specifiers are:
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</p><dl compact="compact">
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<dt>‘<samp><var>stream_index</var></samp>’</dt>
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<dd><p>Matches the stream with this index. E.g. <code>-threads:1 4</code> would set the
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thread count for the second stream to 4.
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</p></dd>
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<dt>‘<samp><var>stream_type</var>[:<var>stream_index</var>]</samp>’</dt>
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<dd><p><var>stream_type</var> is one of following: ’v’ or ’V’ for video, ’a’ for audio, ’s’
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for subtitle, ’d’ for data, and ’t’ for attachments. ’v’ matches all video
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streams, ’V’ only matches video streams which are not attached pictures, video
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thumbnails or cover arts. If <var>stream_index</var> is given, then it matches
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stream number <var>stream_index</var> of this type. Otherwise, it matches all
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streams of this type.
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</p></dd>
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<dt>‘<samp>p:<var>program_id</var>[:<var>stream_index</var>] or p:<var>program_id</var>[:<var>stream_type</var>[:<var>stream_index</var>]] or</samp>’</dt>
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<dd><p>p:<var>program_id</var>:m:<var>key</var>[:<var>value</var>]
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In first version, if <var>stream_index</var> is given, then it matches the stream with number <var>stream_index</var>
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in the program with the id <var>program_id</var>. Otherwise, it matches all streams in the
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program. In the second version, <var>stream_type</var> is one of following: ’v’ for video, ’a’ for audio, ’s’
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for subtitle, ’d’ for data. If <var>stream_index</var> is also given, then it matches
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stream number <var>stream_index</var> of this type in the program with the id <var>program_id</var>.
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Otherwise, if only <var>stream_type</var> is given, it matches all
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streams of this type in the program with the id <var>program_id</var>.
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In the third version matches streams in the program with the id <var>program_id</var> with the metadata
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tag <var>key</var> having the specified value. If
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<var>value</var> is not given, matches streams that contain the given tag with any
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value.
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</p>
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</dd>
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<dt>‘<samp>#<var>stream_id</var> or i:<var>stream_id</var></samp>’</dt>
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<dd><p>Match the stream by stream id (e.g. PID in MPEG-TS container).
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</p></dd>
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<dt>‘<samp>m:<var>key</var>[:<var>value</var>]</samp>’</dt>
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<dd><p>Matches streams with the metadata tag <var>key</var> having the specified value. If
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<var>value</var> is not given, matches streams that contain the given tag with any
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value.
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</p></dd>
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<dt>‘<samp>u</samp>’</dt>
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<dd><p>Matches streams with usable configuration, the codec must be defined and the
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essential information such as video dimension or audio sample rate must be present.
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</p>
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<p>Note that in <code>ffmpeg</code>, matching by metadata will only work properly for
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input files.
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</p></dd>
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</dl>
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<a name="Generic-options"></a>
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<h2 class="section"><a href="ffplay.html#toc-Generic-options">3.2 Generic options</a></h2>
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<p>These options are shared amongst the ff* tools.
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</p>
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<dl compact="compact">
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<dt>‘<samp>-L</samp>’</dt>
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<dd><p>Show license.
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</p>
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</dd>
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<dt>‘<samp>-h, -?, -help, --help [<var>arg</var>]</samp>’</dt>
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<dd><p>Show help. An optional parameter may be specified to print help about a specific
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item. If no argument is specified, only basic (non advanced) tool
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options are shown.
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</p>
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<p>Possible values of <var>arg</var> are:
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</p><dl compact="compact">
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<dt>‘<samp>long</samp>’</dt>
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<dd><p>Print advanced tool options in addition to the basic tool options.
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</p>
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</dd>
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<dt>‘<samp>full</samp>’</dt>
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<dd><p>Print complete list of options, including shared and private options
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for encoders, decoders, demuxers, muxers, filters, etc.
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</p>
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</dd>
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<dt>‘<samp>decoder=<var>decoder_name</var></samp>’</dt>
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<dd><p>Print detailed information about the decoder named <var>decoder_name</var>. Use the
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‘<samp>-decoders</samp>’ option to get a list of all decoders.
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</p>
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</dd>
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<dt>‘<samp>encoder=<var>encoder_name</var></samp>’</dt>
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<dd><p>Print detailed information about the encoder named <var>encoder_name</var>. Use the
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‘<samp>-encoders</samp>’ option to get a list of all encoders.
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</p>
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</dd>
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<dt>‘<samp>demuxer=<var>demuxer_name</var></samp>’</dt>
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<dd><p>Print detailed information about the demuxer named <var>demuxer_name</var>. Use the
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‘<samp>-formats</samp>’ option to get a list of all demuxers and muxers.
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</p>
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</dd>
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<dt>‘<samp>muxer=<var>muxer_name</var></samp>’</dt>
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<dd><p>Print detailed information about the muxer named <var>muxer_name</var>. Use the
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‘<samp>-formats</samp>’ option to get a list of all muxers and demuxers.
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</p>
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</dd>
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<dt>‘<samp>filter=<var>filter_name</var></samp>’</dt>
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<dd><p>Print detailed information about the filter name <var>filter_name</var>. Use the
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‘<samp>-filters</samp>’ option to get a list of all filters.
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</p></dd>
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</dl>
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</dd>
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<dt>‘<samp>-version</samp>’</dt>
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<dd><p>Show version.
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</p>
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</dd>
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<dt>‘<samp>-formats</samp>’</dt>
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<dd><p>Show available formats (including devices).
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</p>
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</dd>
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<dt>‘<samp>-demuxers</samp>’</dt>
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<dd><p>Show available demuxers.
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</p>
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</dd>
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<dt>‘<samp>-muxers</samp>’</dt>
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<dd><p>Show available muxers.
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</p>
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</dd>
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<dt>‘<samp>-devices</samp>’</dt>
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<dd><p>Show available devices.
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</p>
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</dd>
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<dt>‘<samp>-codecs</samp>’</dt>
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<dd><p>Show all codecs known to libavcodec.
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</p>
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<p>Note that the term ’codec’ is used throughout this documentation as a shortcut
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for what is more correctly called a media bitstream format.
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</p>
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</dd>
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<dt>‘<samp>-decoders</samp>’</dt>
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<dd><p>Show available decoders.
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</p>
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</dd>
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<dt>‘<samp>-encoders</samp>’</dt>
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<dd><p>Show all available encoders.
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</p>
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</dd>
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<dt>‘<samp>-bsfs</samp>’</dt>
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<dd><p>Show available bitstream filters.
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</p>
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</dd>
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<dt>‘<samp>-protocols</samp>’</dt>
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<dd><p>Show available protocols.
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</p>
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</dd>
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<dt>‘<samp>-filters</samp>’</dt>
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<dd><p>Show available libavfilter filters.
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</p>
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</dd>
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<dt>‘<samp>-pix_fmts</samp>’</dt>
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<dd><p>Show available pixel formats.
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</p>
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</dd>
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<dt>‘<samp>-sample_fmts</samp>’</dt>
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<dd><p>Show available sample formats.
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</p>
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</dd>
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<dt>‘<samp>-layouts</samp>’</dt>
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<dd><p>Show channel names and standard channel layouts.
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</p>
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</dd>
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<dt>‘<samp>-colors</samp>’</dt>
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<dd><p>Show recognized color names.
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</p>
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</dd>
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<dt>‘<samp>-sources <var>device</var>[,<var>opt1</var>=<var>val1</var>[,<var>opt2</var>=<var>val2</var>]...]</samp>’</dt>
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<dd><p>Show autodetected sources of the input device.
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Some devices may provide system-dependent source names that cannot be autodetected.
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The returned list cannot be assumed to be always complete.
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</p><div class="example">
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<pre class="example">ffmpeg -sources pulse,server=192.168.0.4
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</pre></div>
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</dd>
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<dt>‘<samp>-sinks <var>device</var>[,<var>opt1</var>=<var>val1</var>[,<var>opt2</var>=<var>val2</var>]...]</samp>’</dt>
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<dd><p>Show autodetected sinks of the output device.
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Some devices may provide system-dependent sink names that cannot be autodetected.
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The returned list cannot be assumed to be always complete.
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</p><div class="example">
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<pre class="example">ffmpeg -sinks pulse,server=192.168.0.4
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</pre></div>
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</dd>
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<dt>‘<samp>-loglevel [<var>flags</var>+]<var>loglevel</var> | -v [<var>flags</var>+]<var>loglevel</var></samp>’</dt>
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<dd><p>Set logging level and flags used by the library.
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</p>
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<p>The optional <var>flags</var> prefix can consist of the following values:
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</p><dl compact="compact">
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<dt>‘<samp>repeat</samp>’</dt>
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<dd><p>Indicates that repeated log output should not be compressed to the first line
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and the "Last message repeated n times" line will be omitted.
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</p></dd>
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<dt>‘<samp>level</samp>’</dt>
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<dd><p>Indicates that log output should add a <code>[level]</code> prefix to each message
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line. This can be used as an alternative to log coloring, e.g. when dumping the
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log to file.
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</p></dd>
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</dl>
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<p>Flags can also be used alone by adding a ’+’/’-’ prefix to set/reset a single
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flag without affecting other <var>flags</var> or changing <var>loglevel</var>. When
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setting both <var>flags</var> and <var>loglevel</var>, a ’+’ separator is expected
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between the last <var>flags</var> value and before <var>loglevel</var>.
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</p>
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<p><var>loglevel</var> is a string or a number containing one of the following values:
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</p><dl compact="compact">
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<dt>‘<samp>quiet, -8</samp>’</dt>
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<dd><p>Show nothing at all; be silent.
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</p></dd>
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<dt>‘<samp>panic, 0</samp>’</dt>
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<dd><p>Only show fatal errors which could lead the process to crash, such as
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an assertion failure. This is not currently used for anything.
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</p></dd>
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<dt>‘<samp>fatal, 8</samp>’</dt>
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<dd><p>Only show fatal errors. These are errors after which the process absolutely
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cannot continue.
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</p></dd>
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<dt>‘<samp>error, 16</samp>’</dt>
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<dd><p>Show all errors, including ones which can be recovered from.
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</p></dd>
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<dt>‘<samp>warning, 24</samp>’</dt>
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<dd><p>Show all warnings and errors. Any message related to possibly
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incorrect or unexpected events will be shown.
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</p></dd>
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<dt>‘<samp>info, 32</samp>’</dt>
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<dd><p>Show informative messages during processing. This is in addition to
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warnings and errors. This is the default value.
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</p></dd>
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<dt>‘<samp>verbose, 40</samp>’</dt>
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<dd><p>Same as <code>info</code>, except more verbose.
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</p></dd>
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<dt>‘<samp>debug, 48</samp>’</dt>
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<dd><p>Show everything, including debugging information.
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</p></dd>
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<dt>‘<samp>trace, 56</samp>’</dt>
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</dl>
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<p>For example to enable repeated log output, add the <code>level</code> prefix, and set
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<var>loglevel</var> to <code>verbose</code>:
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</p><div class="example">
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<pre class="example">ffmpeg -loglevel repeat+level+verbose -i input output
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</pre></div>
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<p>Another example that enables repeated log output without affecting current
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state of <code>level</code> prefix flag or <var>loglevel</var>:
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</p><div class="example">
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<pre class="example">ffmpeg [...] -loglevel +repeat
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</pre></div>
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<p>By default the program logs to stderr. If coloring is supported by the
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terminal, colors are used to mark errors and warnings. Log coloring
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can be disabled setting the environment variable
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<code>AV_LOG_FORCE_NOCOLOR</code> or <code>NO_COLOR</code>, or can be forced setting
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the environment variable <code>AV_LOG_FORCE_COLOR</code>.
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The use of the environment variable <code>NO_COLOR</code> is deprecated and
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will be dropped in a future FFmpeg version.
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</p>
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</dd>
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<dt>‘<samp>-report</samp>’</dt>
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<dd><p>Dump full command line and console output to a file named
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<code><var>program</var>-<var>YYYYMMDD</var>-<var>HHMMSS</var>.log</code> in the current
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directory.
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This file can be useful for bug reports.
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It also implies <code>-loglevel verbose</code>.
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</p>
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<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
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options will affect the report; option values must be escaped if they
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contain special characters or the options delimiter ’:’ (see the
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“Quoting and escaping” section in the ffmpeg-utils manual).
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</p>
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<p>The following options are recognized:
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</p><dl compact="compact">
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<dt>‘<samp>file</samp>’</dt>
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<dd><p>set the file name to use for the report; <code>%p</code> is expanded to the name
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of the program, <code>%t</code> is expanded to a timestamp, <code>%%</code> is expanded
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to a plain <code>%</code>
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</p></dd>
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<dt>‘<samp>level</samp>’</dt>
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<dd><p>set the log verbosity level using a numerical value (see <code>-loglevel</code>).
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</p></dd>
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</dl>
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<p>For example, to output a report to a file named ‘<tt>ffreport.log</tt>’
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using a log level of <code>32</code> (alias for log level <code>info</code>):
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</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>‘<samp>-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>-cpuflags flags (<em>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">ffmpeg -cpuflags -sse+mmx ...
|
|
ffmpeg -cpuflags mmx ...
|
|
ffmpeg -cpuflags 0 ...
|
|
</pre></div>
|
|
<p>Possible flags for this option are:
|
|
</p><dl compact="compact">
|
|
<dt>‘<samp>x86</samp>’</dt>
|
|
<dd><dl compact="compact">
|
|
<dt>‘<samp>mmx</samp>’</dt>
|
|
<dt>‘<samp>mmxext</samp>’</dt>
|
|
<dt>‘<samp>sse</samp>’</dt>
|
|
<dt>‘<samp>sse2</samp>’</dt>
|
|
<dt>‘<samp>sse2slow</samp>’</dt>
|
|
<dt>‘<samp>sse3</samp>’</dt>
|
|
<dt>‘<samp>sse3slow</samp>’</dt>
|
|
<dt>‘<samp>ssse3</samp>’</dt>
|
|
<dt>‘<samp>atom</samp>’</dt>
|
|
<dt>‘<samp>sse4.1</samp>’</dt>
|
|
<dt>‘<samp>sse4.2</samp>’</dt>
|
|
<dt>‘<samp>avx</samp>’</dt>
|
|
<dt>‘<samp>avx2</samp>’</dt>
|
|
<dt>‘<samp>xop</samp>’</dt>
|
|
<dt>‘<samp>fma3</samp>’</dt>
|
|
<dt>‘<samp>fma4</samp>’</dt>
|
|
<dt>‘<samp>3dnow</samp>’</dt>
|
|
<dt>‘<samp>3dnowext</samp>’</dt>
|
|
<dt>‘<samp>bmi1</samp>’</dt>
|
|
<dt>‘<samp>bmi2</samp>’</dt>
|
|
<dt>‘<samp>cmov</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp>ARM</samp>’</dt>
|
|
<dd><dl compact="compact">
|
|
<dt>‘<samp>armv5te</samp>’</dt>
|
|
<dt>‘<samp>armv6</samp>’</dt>
|
|
<dt>‘<samp>armv6t2</samp>’</dt>
|
|
<dt>‘<samp>vfp</samp>’</dt>
|
|
<dt>‘<samp>vfpv3</samp>’</dt>
|
|
<dt>‘<samp>neon</samp>’</dt>
|
|
<dt>‘<samp>setend</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp>AArch64</samp>’</dt>
|
|
<dd><dl compact="compact">
|
|
<dt>‘<samp>armv8</samp>’</dt>
|
|
<dt>‘<samp>vfp</samp>’</dt>
|
|
<dt>‘<samp>neon</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp>PowerPC</samp>’</dt>
|
|
<dd><dl compact="compact">
|
|
<dt>‘<samp>altivec</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp>Specific Processors</samp>’</dt>
|
|
<dd><dl compact="compact">
|
|
<dt>‘<samp>pentium2</samp>’</dt>
|
|
<dt>‘<samp>pentium3</samp>’</dt>
|
|
<dt>‘<samp>pentium4</samp>’</dt>
|
|
<dt>‘<samp>k6</samp>’</dt>
|
|
<dt>‘<samp>k62</samp>’</dt>
|
|
<dt>‘<samp>athlon</samp>’</dt>
|
|
<dt>‘<samp>athlonxp</samp>’</dt>
|
|
<dt>‘<samp>k8</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
</dl>
|
|
|
|
<a name="AVOptions"></a>
|
|
<h2 class="section"><a href="ffplay.html#toc-AVOptions">3.3 AVOptions</a></h2>
|
|
|
|
<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>‘<samp>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>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>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>
|
|
<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>
|
|
<h2 class="section"><a href="ffplay.html#toc-Main-options">3.4 Main options</a></h2>
|
|
|
|
<dl compact="compact">
|
|
<dt>‘<samp>-x <var>width</var></samp>’</dt>
|
|
<dd><p>Force displayed width.
|
|
</p></dd>
|
|
<dt>‘<samp>-y <var>height</var></samp>’</dt>
|
|
<dd><p>Force displayed height.
|
|
</p></dd>
|
|
<dt>‘<samp>-s <var>size</var></samp>’</dt>
|
|
<dd><p>Set frame size (WxH or abbreviation), needed for videos which do
|
|
not contain a header with the frame size like raw YUV. This option
|
|
has been deprecated in favor of private options, try -video_size.
|
|
</p></dd>
|
|
<dt>‘<samp>-fs</samp>’</dt>
|
|
<dd><p>Start in fullscreen mode.
|
|
</p></dd>
|
|
<dt>‘<samp>-an</samp>’</dt>
|
|
<dd><p>Disable audio.
|
|
</p></dd>
|
|
<dt>‘<samp>-vn</samp>’</dt>
|
|
<dd><p>Disable video.
|
|
</p></dd>
|
|
<dt>‘<samp>-sn</samp>’</dt>
|
|
<dd><p>Disable subtitles.
|
|
</p></dd>
|
|
<dt>‘<samp>-ss <var>pos</var></samp>’</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 href="ffmpeg-utils.html#time-duration-syntax">(ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual</a>.
|
|
</p></dd>
|
|
<dt>‘<samp>-t <var>duration</var></samp>’</dt>
|
|
<dd><p>Play <var>duration</var> seconds of audio/video.
|
|
</p>
|
|
<p><var>duration</var> must be a time duration specification,
|
|
see <a href="ffmpeg-utils.html#time-duration-syntax">(ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual</a>.
|
|
</p></dd>
|
|
<dt>‘<samp>-bytes</samp>’</dt>
|
|
<dd><p>Seek by bytes.
|
|
</p></dd>
|
|
<dt>‘<samp>-nodisp</samp>’</dt>
|
|
<dd><p>Disable graphical display.
|
|
</p></dd>
|
|
<dt>‘<samp>-noborder</samp>’</dt>
|
|
<dd><p>Borderless window.
|
|
</p></dd>
|
|
<dt>‘<samp>-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>-f <var>fmt</var></samp>’</dt>
|
|
<dd><p>Force format.
|
|
</p></dd>
|
|
<dt>‘<samp>-window_title <var>title</var></samp>’</dt>
|
|
<dd><p>Set window title (default is the input filename).
|
|
</p></dd>
|
|
<dt>‘<samp>-loop <var>number</var></samp>’</dt>
|
|
<dd><p>Loops movie playback <number> times. 0 means forever.
|
|
</p></dd>
|
|
<dt>‘<samp>-showmode <var>mode</var></samp>’</dt>
|
|
<dd><p>Set the show mode to use.
|
|
Available values for <var>mode</var> are:
|
|
</p><dl compact="compact">
|
|
<dt>‘<samp>0, video</samp>’</dt>
|
|
<dd><p>show video
|
|
</p></dd>
|
|
<dt>‘<samp>1, waves</samp>’</dt>
|
|
<dd><p>show audio waves
|
|
</p></dd>
|
|
<dt>‘<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 <w>.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-vf <var>filtergraph</var></samp>’</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 <w>.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-af <var>filtergraph</var></samp>’</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>‘<samp>-i <var>input_url</var></samp>’</dt>
|
|
<dd><p>Read <var>input_url</var>.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<a name="Advanced-options"></a>
|
|
<h2 class="section"><a href="ffplay.html#toc-Advanced-options">3.5 Advanced options</a></h2>
|
|
<dl compact="compact">
|
|
<dt>‘<samp>-pix_fmt <var>format</var></samp>’</dt>
|
|
<dd><p>Set pixel format.
|
|
This option has been deprecated in favor of private options, try -pixel_format.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-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 on by default, to
|
|
explicitly disable it you need to specify <code>-nostats</code>.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-fast</samp>’</dt>
|
|
<dd><p>Non-spec-compliant optimizations.
|
|
</p></dd>
|
|
<dt>‘<samp>-genpts</samp>’</dt>
|
|
<dd><p>Generate pts.
|
|
</p></dd>
|
|
<dt>‘<samp>-sync <var>type</var></samp>’</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>‘<samp>-ast <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 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>-vst <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 href="#Stream-specifiers">Stream specifiers</a> chapter. If this option
|
|
is not specified, the "best" video stream is selected.
|
|
</p></dd>
|
|
<dt>‘<samp>-sst <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 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>-autoexit</samp>’</dt>
|
|
<dd><p>Exit when video is done playing.
|
|
</p></dd>
|
|
<dt>‘<samp>-exitonkeydown</samp>’</dt>
|
|
<dd><p>Exit if any key is pressed.
|
|
</p></dd>
|
|
<dt>‘<samp>-exitonmousedown</samp>’</dt>
|
|
<dd><p>Exit if any mouse button is pressed.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-codec:<var>media_specifier</var> <var>codec_name</var></samp>’</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>‘<samp>-acodec <var>codec_name</var></samp>’</dt>
|
|
<dd><p>Force a specific audio decoder.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-vcodec <var>codec_name</var></samp>’</dt>
|
|
<dd><p>Force a specific video decoder.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-scodec <var>codec_name</var></samp>’</dt>
|
|
<dd><p>Force a specific subtitle decoder.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-autorotate</samp>’</dt>
|
|
<dd><p>Automatically rotate the video according to file metadata. Enabled by
|
|
default, use ‘<samp>-noautorotate</samp>’ to disable it.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-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>-noframedrop</samp>’ to disable it.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp>-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>-noinfbuf</samp>’ to disable it.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
<a name="While-playing"></a>
|
|
<h2 class="section"><a href="ffplay.html#toc-While-playing">3.6 While playing</a></h2>
|
|
|
|
<dl compact="compact">
|
|
<dt><q, ESC></dt>
|
|
<dd><p>Quit.
|
|
</p>
|
|
</dd>
|
|
<dt><f></dt>
|
|
<dd><p>Toggle full screen.
|
|
</p>
|
|
</dd>
|
|
<dt><p, SPC></dt>
|
|
<dd><p>Pause.
|
|
</p>
|
|
</dd>
|
|
<dt><m></dt>
|
|
<dd><p>Toggle mute.
|
|
</p>
|
|
</dd>
|
|
<dt><9, 0></dt>
|
|
<dd><p>Decrease and increase volume respectively.
|
|
</p>
|
|
</dd>
|
|
<dt></, *></dt>
|
|
<dd><p>Decrease and increase volume respectively.
|
|
</p>
|
|
</dd>
|
|
<dt><a></dt>
|
|
<dd><p>Cycle audio channel in the current program.
|
|
</p>
|
|
</dd>
|
|
<dt><v></dt>
|
|
<dd><p>Cycle video channel.
|
|
</p>
|
|
</dd>
|
|
<dt><t></dt>
|
|
<dd><p>Cycle subtitle channel in the current program.
|
|
</p>
|
|
</dd>
|
|
<dt><c></dt>
|
|
<dd><p>Cycle program.
|
|
</p>
|
|
</dd>
|
|
<dt><w></dt>
|
|
<dd><p>Cycle video filters or show modes.
|
|
</p>
|
|
</dd>
|
|
<dt><s></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><left/right></dt>
|
|
<dd><p>Seek backward/forward 10 seconds.
|
|
</p>
|
|
</dd>
|
|
<dt><down/up></dt>
|
|
<dd><p>Seek backward/forward 1 minute.
|
|
</p>
|
|
</dd>
|
|
<dt><page down/page up></dt>
|
|
<dd><p>Seek to the previous/next chapter.
|
|
or if there are no chapters
|
|
Seek backward/forward 10 minutes.
|
|
</p>
|
|
</dd>
|
|
<dt><right mouse click></dt>
|
|
<dd><p>Seek to percentage in file corresponding to fraction of width.
|
|
</p>
|
|
</dd>
|
|
<dt><left mouse double-click></dt>
|
|
<dd><p>Toggle full screen.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
|
|
|
|
<a name="See-Also"></a>
|
|
<h1 class="chapter"><a href="ffplay.html#toc-See-Also">4 See Also</a></h1>
|
|
|
|
<p><a href="ffplay-all.html">ffmpeg-all</a>,
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<a href="ffmpeg.html">ffmpeg</a>, <a href="ffprobe.html">ffprobe</a>,
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<a href="ffmpeg-utils.html">ffmpeg-utils</a>,
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<a href="ffmpeg-scaler.html">ffmpeg-scaler</a>,
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<a href="ffmpeg-resampler.html">ffmpeg-resampler</a>,
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<a href="ffmpeg-codecs.html">ffmpeg-codecs</a>,
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<a href="ffmpeg-bitstream-filters.html">ffmpeg-bitstream-filters</a>,
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<a href="ffmpeg-formats.html">ffmpeg-formats</a>,
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<a href="ffmpeg-devices.html">ffmpeg-devices</a>,
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<a href="ffmpeg-protocols.html">ffmpeg-protocols</a>,
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<a href="ffmpeg-filters.html">ffmpeg-filters</a>
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</p>
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<a name="Authors"></a>
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<h1 class="chapter"><a href="ffplay.html#toc-Authors">5 Authors</a></h1>
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<p>The FFmpeg developers.
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</p>
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<p>For details about the authorship, see the Git history of the project
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(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
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<code>git log</code> in the FFmpeg source directory, or browsing the
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online repository at <a href="http://source.ffmpeg.org">http://source.ffmpeg.org</a>.
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</p>
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<p>Maintainers for the specific components are listed in the file
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‘<tt>MAINTAINERS</tt>’ in the source code tree.
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</p>
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</div>
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</body>
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</html>
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