823 lines
32 KiB
HTML
823 lines
32 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<meta charset="utf-8">
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<title>
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ffplay Documentation
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</title>
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<meta name="viewport" content="width=device-width,initial-scale=1.0">
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<link rel="stylesheet" type="text/css" href="bootstrap.min.css">
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<link rel="stylesheet" type="text/css" href="style.min.css">
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</head>
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<body>
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<div class="container">
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<h1>
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ffplay Documentation
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</h1>
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<div align="center">
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</div>
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<a name="SEC_Top"></a>
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<a name="SEC_Contents"></a>
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<h2 class="contents-heading">Table of Contents</h2>
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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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<a name="Synopsis"></a>
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<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>
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<p>ffplay [<var>options</var>] [<samp>input_file</samp>]
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</p>
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<a name="Description"></a>
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<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>
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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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<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>
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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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<a name="Stream-specifiers"></a><a name="Stream-specifiers-1"></a>
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<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>
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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>]</samp></dt>
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<dd><p>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.
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</p></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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<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>
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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>-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 intput 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 [repeat+]<var>loglevel</var> | -v [repeat+]<var>loglevel</var></samp></dt>
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<dd><p>Set the logging level used by the library.
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Adding "repeat+" indicates that repeated log output should not be compressed
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to the first line and the "Last message repeated n times" line will be
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omitted. "repeat" can also be used alone.
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If "repeat" is used alone, and with no prior loglevel set, the default
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loglevel will be used. If multiple loglevel parameters are given, using
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’repeat’ will not change the loglevel.
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<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>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
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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 <samp>ffreport.log</samp>
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using a log level of <code>32</code> (alias for log level <code>info</code>):
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</p>
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<div class="example">
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<pre class="example">FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output
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</pre></div>
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<p>Errors in parsing the environment variable are not fatal, and will not
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appear in the report.
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</p>
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</dd>
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<dt><samp>-hide_banner</samp></dt>
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<dd><p>Suppress printing banner.
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</p>
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<p>All FFmpeg tools will normally show a copyright notice, build options
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and library versions. This option can be used to suppress printing
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this information.
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</p>
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</dd>
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<dt><samp>-cpuflags flags (<em>global</em>)</samp></dt>
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<dd><p>Allows setting and clearing cpu flags. This option is intended
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for testing. Do not use it unless you know what you’re doing.
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</p><div class="example">
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<pre class="example">ffmpeg -cpuflags -sse+mmx ...
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ffmpeg -cpuflags mmx ...
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ffmpeg -cpuflags 0 ...
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</pre></div>
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<p>Possible flags for this option are:
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</p><dl compact="compact">
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<dt>‘<samp>x86</samp>’</dt>
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<dd><dl compact="compact">
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<dt>‘<samp>mmx</samp>’</dt>
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<dt>‘<samp>mmxext</samp>’</dt>
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<dt>‘<samp>sse</samp>’</dt>
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<dt>‘<samp>sse2</samp>’</dt>
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<dt>‘<samp>sse2slow</samp>’</dt>
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<dt>‘<samp>sse3</samp>’</dt>
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<dt>‘<samp>sse3slow</samp>’</dt>
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<dt>‘<samp>ssse3</samp>’</dt>
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<dt>‘<samp>atom</samp>’</dt>
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<dt>‘<samp>sse4.1</samp>’</dt>
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<dt>‘<samp>sse4.2</samp>’</dt>
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<dt>‘<samp>avx</samp>’</dt>
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<dt>‘<samp>avx2</samp>’</dt>
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<dt>‘<samp>xop</samp>’</dt>
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<dt>‘<samp>fma3</samp>’</dt>
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<dt>‘<samp>fma4</samp>’</dt>
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<dt>‘<samp>3dnow</samp>’</dt>
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<dt>‘<samp>3dnowext</samp>’</dt>
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<dt>‘<samp>bmi1</samp>’</dt>
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<dt>‘<samp>bmi2</samp>’</dt>
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<dt>‘<samp>cmov</samp>’</dt>
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</dl>
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</dd>
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<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>
|
|
<dt><samp>-opencl_bench</samp></dt>
|
|
<dd><p>This option is used to benchmark all available OpenCL devices and print the
|
|
results. This option is only available when FFmpeg has been compiled with
|
|
<code>--enable-opencl</code>.
|
|
</p>
|
|
<p>When FFmpeg is configured with <code>--enable-opencl</code>, the options for the
|
|
global OpenCL context are set via <samp>-opencl_options</samp>. See the
|
|
"OpenCL Options" section in the ffmpeg-utils manual for the complete list of
|
|
supported options. Amongst others, these options include the ability to select
|
|
a specific platform and device to run the OpenCL code on. By default, FFmpeg
|
|
will run on the first device of the first platform. While the options for the
|
|
global OpenCL context provide flexibility to the user in selecting the OpenCL
|
|
device of their choice, most users would probably want to select the fastest
|
|
OpenCL device for their system.
|
|
</p>
|
|
<p>This option assists the selection of the most efficient configuration by
|
|
identifying the appropriate device for the user’s system. The built-in
|
|
benchmark is run on all the OpenCL devices and the performance is measured for
|
|
each device. The devices in the results list are sorted based on their
|
|
performance with the fastest device listed first. The user can subsequently
|
|
invoke <code>ffmpeg</code> using the device deemed most appropriate via
|
|
<samp>-opencl_options</samp> to obtain the best performance for the OpenCL
|
|
accelerated code.
|
|
</p>
|
|
<p>Typical usage to use the fastest OpenCL device involve the following steps.
|
|
</p>
|
|
<p>Run the command:
|
|
</p><div class="example">
|
|
<pre class="example">ffmpeg -opencl_bench
|
|
</pre></div>
|
|
<p>Note down the platform ID (<var>pidx</var>) and device ID (<var>didx</var>) of the first
|
|
i.e. fastest device in the list.
|
|
Select the platform and device using the command:
|
|
</p><div class="example">
|
|
<pre class="example">ffmpeg -opencl_options platform_idx=<var>pidx</var>:device_idx=<var>didx</var> ...
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><samp>-opencl_options options (<em>global</em>)</samp></dt>
|
|
<dd><p>Set OpenCL environment options. This option is only available when
|
|
FFmpeg has been compiled with <code>--enable-opencl</code>.
|
|
</p>
|
|
<p><var>options</var> must be a list of <var>key</var>=<var>value</var> option pairs
|
|
separated by ’:’. See the “OpenCL Options” section in the
|
|
ffmpeg-utils manual for the list of supported options.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<a name="AVOptions"></a>
|
|
<h3 class="section">3.3 AVOptions<span class="pull-right"><a class="anchor hidden-xs" href="#AVOptions" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-AVOptions" aria-hidden="true">TOC</a></span></h3>
|
|
|
|
<p>These options are provided directly by the libavformat, libavdevice and
|
|
libavcodec libraries. To see the list of available AVOptions, use the
|
|
<samp>-help</samp> option. They are separated into two categories:
|
|
</p><dl compact="compact">
|
|
<dt><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>
|
|
<h3 class="section">3.4 Main options<span class="pull-right"><a class="anchor hidden-xs" href="#Main-options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Main-options" aria-hidden="true">TOC</a></span></h3>
|
|
|
|
<dl compact="compact">
|
|
<dt><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>-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 <tt class="key">w</tt>.
|
|
</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 <tt class="key">w</tt>.
|
|
</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_file</var></samp></dt>
|
|
<dd><p>Read <var>input_file</var>.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<a name="Advanced-options"></a>
|
|
<h3 class="section">3.5 Advanced options<span class="pull-right"><a class="anchor hidden-xs" href="#Advanced-options" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Advanced-options" aria-hidden="true">TOC</a></span></h3>
|
|
<dl compact="compact">
|
|
<dt><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>
|
|
<h3 class="section">3.6 While playing<span class="pull-right"><a class="anchor hidden-xs" href="#While-playing" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-While-playing" aria-hidden="true">TOC</a></span></h3>
|
|
|
|
<dl compact="compact">
|
|
<dt><tt class="key">q, ESC</tt></dt>
|
|
<dd><p>Quit.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">f</tt></dt>
|
|
<dd><p>Toggle full screen.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">p, SPC</tt></dt>
|
|
<dd><p>Pause.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">m</tt></dt>
|
|
<dd><p>Toggle mute.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">9, 0</tt></dt>
|
|
<dd><p>Decrease and increase volume respectively.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">/, *</tt></dt>
|
|
<dd><p>Decrease and increase volume respectively.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">a</tt></dt>
|
|
<dd><p>Cycle audio channel in the current program.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">v</tt></dt>
|
|
<dd><p>Cycle video channel.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">t</tt></dt>
|
|
<dd><p>Cycle subtitle channel in the current program.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">c</tt></dt>
|
|
<dd><p>Cycle program.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">w</tt></dt>
|
|
<dd><p>Cycle video filters or show modes.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">s</tt></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><tt class="key">left/right</tt></dt>
|
|
<dd><p>Seek backward/forward 10 seconds.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">down/up</tt></dt>
|
|
<dd><p>Seek backward/forward 1 minute.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">page down/page up</tt></dt>
|
|
<dd><p>Seek to the previous/next chapter.
|
|
or if there are no chapters
|
|
Seek backward/forward 10 minutes.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">right mouse click</tt></dt>
|
|
<dd><p>Seek to percentage in file corresponding to fraction of width.
|
|
</p>
|
|
</dd>
|
|
<dt><tt class="key">left mouse double-click</tt></dt>
|
|
<dd><p>Toggle full screen.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
|
|
|
|
<a name="See-Also"></a>
|
|
<h2 class="chapter">4 See Also<span class="pull-right"><a class="anchor hidden-xs" href="#See-Also" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-See-Also" aria-hidden="true">TOC</a></span></h2>
|
|
|
|
<p><a href="ffplay-all.html">ffmpeg-all</a>,
|
|
<a href="ffmpeg.html">ffmpeg</a>, <a href="ffprobe.html">ffprobe</a>, <a href="ffserver.html">ffserver</a>,
|
|
<a href="ffmpeg-utils.html">ffmpeg-utils</a>,
|
|
<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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<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>
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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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<samp>MAINTAINERS</samp> in the source code tree.
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</p>
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<p style="font-size: small;">
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This document was generated using <a href="http://www.gnu.org/software/texinfo/"><em>makeinfo</em></a>.
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</p>
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</div>
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</body>
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</html>
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