4cfad5ae0f
- 全新ui - 全面优化websocket逻辑，提高数字人和ui连接的稳定性及资源开销 - 全面优化唤醒逻辑，提供稳定的普通唤醒模式和前置词唤醒模式 - 优化拾音质量，支持多声道麦克风拾音 - 优化自动播放服务器的对接机制，提供稳定和兼容旧版ue工程的对接模式 - 数字人接口输出机器人表情，以适应新fay ui及单片机的数字人表情输出 - 使用更高级的音频时长计算方式，可以更精准控制音频播放完成后的逻辑 - 修复点击关闭按钮会导致程序退出的bug - 修复没有麦克风的设备开启麦克风会出错的问题 - 为服务器主机地址提供配置项，以方便服务器部署
1259 lines
52 KiB
HTML
1259 lines
52 KiB
HTML
<!DOCTYPE html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>ffprobe Documentation</title>
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<meta name="description" content="ffprobe Documentation">
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<meta name="keywords" content="ffprobe Documentation">
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<link href="#SEC_Contents" rel="contents" title="Table of Contents">
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</head>
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<body lang="en">
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<div class="top-level-extent" id="SEC_Top">
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<div class="element-contents" id="SEC_Contents">
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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="toc-numbered-mark">
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<li><a id="toc-Synopsis" href="#Synopsis">1 Synopsis</a></li>
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<li><a id="toc-Description" href="#Description">2 Description</a></li>
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<li><a id="toc-Options" href="#Options">3 Options</a>
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<ul class="toc-numbered-mark">
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<li><a id="toc-Stream-specifiers-1" href="#Stream-specifiers-1">3.1 Stream specifiers</a></li>
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<li><a id="toc-Generic-options" href="#Generic-options">3.2 Generic options</a></li>
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<li><a id="toc-AVOptions" href="#AVOptions">3.3 AVOptions</a></li>
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<li><a id="toc-Main-options" href="#Main-options">3.4 Main options</a></li>
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</ul></li>
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<li><a id="toc-Writers" href="#Writers">4 Writers</a>
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<ul class="toc-numbered-mark">
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<li><a id="toc-default" href="#default">4.1 default</a></li>
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<li><a id="toc-compact_002c-csv" href="#compact_002c-csv">4.2 compact, csv</a></li>
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<li><a id="toc-flat" href="#flat">4.3 flat</a></li>
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<li><a id="toc-ini" href="#ini">4.4 ini</a></li>
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<li><a id="toc-json" href="#json">4.5 json</a></li>
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<li><a id="toc-xml" href="#xml">4.6 xml</a></li>
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</ul></li>
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<li><a id="toc-Timecode" href="#Timecode">5 Timecode</a></li>
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<li><a id="toc-See-Also" href="#See-Also">6 See Also</a></li>
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<li><a id="toc-Authors" href="#Authors">7 Authors</a></li>
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</ul>
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</div>
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</div>
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<div class="chapter-level-extent" id="Synopsis">
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<h2 class="chapter">1 Synopsis</h2>
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<p>ffprobe [<var class="var">options</var>] <samp class="file">input_url</samp>
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</p>
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</div>
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<div class="chapter-level-extent" id="Description">
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<h2 class="chapter">2 Description</h2>
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<p>ffprobe gathers information from multimedia streams and prints it in
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human- and machine-readable fashion.
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</p>
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<p>For example it can be used to check the format of the container used
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by a multimedia stream and the format and type of each media stream
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contained in it.
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</p>
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<p>If a url is specified in input, ffprobe will try to open and
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probe the url content. If the url cannot be opened or recognized as
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a multimedia file, a positive exit code is returned.
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</p>
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<p>If no output is specified as output with <samp class="option">o</samp> ffprobe will write
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to stdout.
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</p>
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<p>ffprobe may be employed both as a standalone application or in
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combination with a textual filter, which may perform more
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sophisticated processing, e.g. statistical processing or plotting.
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</p>
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<p>Options are used to list some of the formats supported by ffprobe or
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for specifying which information to display, and for setting how
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ffprobe will show it.
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</p>
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<p>ffprobe output is designed to be easily parsable by a textual filter,
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and consists of one or more sections of a form defined by the selected
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writer, which is specified by the <samp class="option">print_format</samp> option.
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</p>
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<p>Sections may contain other nested sections, and are identified by a
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name (which may be shared by other sections), and an unique
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name. See the output of <samp class="option">sections</samp>.
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</p>
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<p>Metadata tags stored in the container or in the streams are recognized
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and printed in the corresponding "FORMAT", "STREAM" or "PROGRAM_STREAM"
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section.
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</p>
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</div>
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<div class="chapter-level-extent" id="Options">
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<h2 class="chapter">3 Options</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 class="anchor" id="Stream-specifiers"></a><ul class="mini-toc">
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<li><a href="#Stream-specifiers-1" accesskey="1">Stream specifiers</a></li>
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<li><a href="#Generic-options" accesskey="2">Generic options</a></li>
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<li><a href="#AVOptions" accesskey="3">AVOptions</a></li>
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<li><a href="#Main-options" accesskey="4">Main options</a></li>
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</ul>
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<div class="section-level-extent" id="Stream-specifiers-1">
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<h3 class="section">3.1 Stream specifiers</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 class="code">-codec:a:1 ac3</code> contains the
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<code class="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 class="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 class="code">-codec copy</code>
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or <code class="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 class="table">
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<dt><samp class="option"><var class="var">stream_index</var></samp></dt>
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<dd><p>Matches the stream with this index. E.g. <code class="code">-threads:1 4</code> would set the
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thread count for the second stream to 4. If <var class="var">stream_index</var> is used as an
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additional stream specifier (see below), then it selects stream number
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<var class="var">stream_index</var> from the matching streams. Stream numbering is based on the
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order of the streams as detected by libavformat except when a program ID is
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also specified. In this case it is based on the ordering of the streams in the
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program.
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</p></dd>
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<dt><samp class="option"><var class="var">stream_type</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt>
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<dd><p><var class="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 class="var">additional_stream_specifier</var> is used, then
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it matches streams which both have this type and match the
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<var class="var">additional_stream_specifier</var>. Otherwise, it matches all streams of the
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specified type.
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</p></dd>
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<dt><samp class="option">p:<var class="var">program_id</var>[:<var class="var">additional_stream_specifier</var>]</samp></dt>
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<dd><p>Matches streams which are in the program with the id <var class="var">program_id</var>. If
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<var class="var">additional_stream_specifier</var> is used, then it matches streams which both
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are part of the program and match the <var class="var">additional_stream_specifier</var>.
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</p>
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</dd>
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<dt><samp class="option">#<var class="var">stream_id</var> or i:<var class="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 class="option">m:<var class="var">key</var>[:<var class="var">value</var>]</samp></dt>
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<dd><p>Matches streams with the metadata tag <var class="var">key</var> having the specified value. If
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<var class="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 class="option">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 class="command">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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</div>
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<div class="section-level-extent" id="Generic-options">
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<h3 class="section">3.2 Generic options</h3>
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<p>These options are shared amongst the ff* tools.
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</p>
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<dl class="table">
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<dt><samp class="option">-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 class="option">-h, -?, -help, --help [<var class="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 class="var">arg</var> are:
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</p><dl class="table">
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<dt><samp class="option">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 class="option">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 class="option">decoder=<var class="var">decoder_name</var></samp></dt>
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<dd><p>Print detailed information about the decoder named <var class="var">decoder_name</var>. Use the
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<samp class="option">-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 class="option">encoder=<var class="var">encoder_name</var></samp></dt>
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<dd><p>Print detailed information about the encoder named <var class="var">encoder_name</var>. Use the
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<samp class="option">-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 class="option">demuxer=<var class="var">demuxer_name</var></samp></dt>
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<dd><p>Print detailed information about the demuxer named <var class="var">demuxer_name</var>. Use the
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<samp class="option">-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 class="option">muxer=<var class="var">muxer_name</var></samp></dt>
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<dd><p>Print detailed information about the muxer named <var class="var">muxer_name</var>. Use the
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<samp class="option">-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 class="option">filter=<var class="var">filter_name</var></samp></dt>
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<dd><p>Print detailed information about the filter named <var class="var">filter_name</var>. Use the
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<samp class="option">-filters</samp> option to get a list of all filters.
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</p>
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</dd>
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<dt><samp class="option">bsf=<var class="var">bitstream_filter_name</var></samp></dt>
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<dd><p>Print detailed information about the bitstream filter named <var class="var">bitstream_filter_name</var>.
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Use the <samp class="option">-bsfs</samp> option to get a list of all bitstream filters.
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</p>
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</dd>
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<dt><samp class="option">protocol=<var class="var">protocol_name</var></samp></dt>
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<dd><p>Print detailed information about the protocol named <var class="var">protocol_name</var>.
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Use the <samp class="option">-protocols</samp> option to get a list of all protocols.
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</p></dd>
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</dl>
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</dd>
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<dt><samp class="option">-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 class="option">-buildconf</samp></dt>
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<dd><p>Show the build configuration, one option per line.
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</p>
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</dd>
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<dt><samp class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-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 class="option">-dispositions</samp></dt>
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<dd><p>Show stream dispositions.
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</p>
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</dd>
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<dt><samp class="option">-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 class="option">-sources <var class="var">device</var>[,<var class="var">opt1</var>=<var class="var">val1</var>[,<var class="var">opt2</var>=<var class="var">val2</var>]...]</samp></dt>
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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-preformatted">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 class="option">-sinks <var class="var">device</var>[,<var class="var">opt1</var>=<var class="var">val1</var>[,<var class="var">opt2</var>=<var class="var">val2</var>]...]</samp></dt>
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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-preformatted">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 class="option">-loglevel [<var class="var">flags</var>+]<var class="var">loglevel</var> | -v [<var class="var">flags</var>+]<var class="var">loglevel</var></samp></dt>
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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 class="var">flags</var> prefix can consist of the following values:
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</p><dl class="table">
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<dt>‘<samp class="samp">repeat</samp>’</dt>
|
|
<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 class="samp">level</samp>’</dt>
|
|
<dd><p>Indicates that log output should add a <code class="code">[level]</code> prefix to each message
|
|
line. This can be used as an alternative to log coloring, e.g. when dumping the
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log to file.
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</p></dd>
|
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</dl>
|
|
<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 class="var">flags</var> or changing <var class="var">loglevel</var>. When
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setting both <var class="var">flags</var> and <var class="var">loglevel</var>, a ’+’ separator is expected
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between the last <var class="var">flags</var> value and before <var class="var">loglevel</var>.
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</p>
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<p><var class="var">loglevel</var> is a string or a number containing one of the following values:
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</p><dl class="table">
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<dt>‘<samp class="samp">quiet, -8</samp>’</dt>
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<dd><p>Show nothing at all; be silent.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">panic, 0</samp>’</dt>
|
|
<dd><p>Only show fatal errors which could lead the process to crash, such as
|
|
an assertion failure. This is not currently used for anything.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">fatal, 8</samp>’</dt>
|
|
<dd><p>Only show fatal errors. These are errors after which the process absolutely
|
|
cannot continue.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">error, 16</samp>’</dt>
|
|
<dd><p>Show all errors, including ones which can be recovered from.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">warning, 24</samp>’</dt>
|
|
<dd><p>Show all warnings and errors. Any message related to possibly
|
|
incorrect or unexpected events will be shown.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">info, 32</samp>’</dt>
|
|
<dd><p>Show informative messages during processing. This is in addition to
|
|
warnings and errors. This is the default value.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">verbose, 40</samp>’</dt>
|
|
<dd><p>Same as <code class="code">info</code>, except more verbose.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">debug, 48</samp>’</dt>
|
|
<dd><p>Show everything, including debugging information.
|
|
</p></dd>
|
|
<dt>‘<samp class="samp">trace, 56</samp>’</dt>
|
|
</dl>
|
|
|
|
<p>For example to enable repeated log output, add the <code class="code">level</code> prefix, and set
|
|
<var class="var">loglevel</var> to <code class="code">verbose</code>:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg -loglevel repeat+level+verbose -i input output
|
|
</pre></div>
|
|
<p>Another example that enables repeated log output without affecting current
|
|
state of <code class="code">level</code> prefix flag or <var class="var">loglevel</var>:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg [...] -loglevel +repeat
|
|
</pre></div>
|
|
|
|
<p>By default the program logs to stderr. If coloring is supported by the
|
|
terminal, colors are used to mark errors and warnings. Log coloring
|
|
can be disabled setting the environment variable
|
|
<code class="env">AV_LOG_FORCE_NOCOLOR</code>, or can be forced setting
|
|
the environment variable <code class="env">AV_LOG_FORCE_COLOR</code>.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-report</samp></dt>
|
|
<dd><p>Dump full command line and log output to a file named
|
|
<code class="code"><var class="var">program</var>-<var class="var">YYYYMMDD</var>-<var class="var">HHMMSS</var>.log</code> in the current
|
|
directory.
|
|
This file can be useful for bug reports.
|
|
It also implies <code class="code">-loglevel debug</code>.
|
|
</p>
|
|
<p>Setting the environment variable <code class="env">FFREPORT</code> to any value has the
|
|
same effect. If the value is a ’:’-separated key=value sequence, these
|
|
options will affect the report; option values must be escaped if they
|
|
contain special characters or the options delimiter ’:’ (see the
|
|
“Quoting and escaping” section in the ffmpeg-utils manual).
|
|
</p>
|
|
<p>The following options are recognized:
|
|
</p><dl class="table">
|
|
<dt><samp class="option">file</samp></dt>
|
|
<dd><p>set the file name to use for the report; <code class="code">%p</code> is expanded to the name
|
|
of the program, <code class="code">%t</code> is expanded to a timestamp, <code class="code">%%</code> is expanded
|
|
to a plain <code class="code">%</code>
|
|
</p></dd>
|
|
<dt><samp class="option">level</samp></dt>
|
|
<dd><p>set the log verbosity level using a numerical value (see <code class="code">-loglevel</code>).
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>For example, to output a report to a file named <samp class="file">ffreport.log</samp>
|
|
using a log level of <code class="code">32</code> (alias for log level <code class="code">info</code>):
|
|
</p>
|
|
<div class="example">
|
|
<pre class="example-preformatted">FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output
|
|
</pre></div>
|
|
|
|
<p>Errors in parsing the environment variable are not fatal, and will not
|
|
appear in the report.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-hide_banner</samp></dt>
|
|
<dd><p>Suppress printing banner.
|
|
</p>
|
|
<p>All FFmpeg tools will normally show a copyright notice, build options
|
|
and library versions. This option can be used to suppress printing
|
|
this information.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-cpuflags flags (<em class="emph">global</em>)</samp></dt>
|
|
<dd><p>Allows setting and clearing cpu flags. This option is intended
|
|
for testing. Do not use it unless you know what you’re doing.
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg -cpuflags -sse+mmx ...
|
|
ffmpeg -cpuflags mmx ...
|
|
ffmpeg -cpuflags 0 ...
|
|
</pre></div>
|
|
<p>Possible flags for this option are:
|
|
</p><dl class="table">
|
|
<dt>‘<samp class="samp">x86</samp>’</dt>
|
|
<dd><dl class="table">
|
|
<dt>‘<samp class="samp">mmx</samp>’</dt>
|
|
<dt>‘<samp class="samp">mmxext</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse2</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse2slow</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse3</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse3slow</samp>’</dt>
|
|
<dt>‘<samp class="samp">ssse3</samp>’</dt>
|
|
<dt>‘<samp class="samp">atom</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse4.1</samp>’</dt>
|
|
<dt>‘<samp class="samp">sse4.2</samp>’</dt>
|
|
<dt>‘<samp class="samp">avx</samp>’</dt>
|
|
<dt>‘<samp class="samp">avx2</samp>’</dt>
|
|
<dt>‘<samp class="samp">xop</samp>’</dt>
|
|
<dt>‘<samp class="samp">fma3</samp>’</dt>
|
|
<dt>‘<samp class="samp">fma4</samp>’</dt>
|
|
<dt>‘<samp class="samp">3dnow</samp>’</dt>
|
|
<dt>‘<samp class="samp">3dnowext</samp>’</dt>
|
|
<dt>‘<samp class="samp">bmi1</samp>’</dt>
|
|
<dt>‘<samp class="samp">bmi2</samp>’</dt>
|
|
<dt>‘<samp class="samp">cmov</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp class="samp">ARM</samp>’</dt>
|
|
<dd><dl class="table">
|
|
<dt>‘<samp class="samp">armv5te</samp>’</dt>
|
|
<dt>‘<samp class="samp">armv6</samp>’</dt>
|
|
<dt>‘<samp class="samp">armv6t2</samp>’</dt>
|
|
<dt>‘<samp class="samp">vfp</samp>’</dt>
|
|
<dt>‘<samp class="samp">vfpv3</samp>’</dt>
|
|
<dt>‘<samp class="samp">neon</samp>’</dt>
|
|
<dt>‘<samp class="samp">setend</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp class="samp">AArch64</samp>’</dt>
|
|
<dd><dl class="table">
|
|
<dt>‘<samp class="samp">armv8</samp>’</dt>
|
|
<dt>‘<samp class="samp">vfp</samp>’</dt>
|
|
<dt>‘<samp class="samp">neon</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp class="samp">PowerPC</samp>’</dt>
|
|
<dd><dl class="table">
|
|
<dt>‘<samp class="samp">altivec</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
<dt>‘<samp class="samp">Specific Processors</samp>’</dt>
|
|
<dd><dl class="table">
|
|
<dt>‘<samp class="samp">pentium2</samp>’</dt>
|
|
<dt>‘<samp class="samp">pentium3</samp>’</dt>
|
|
<dt>‘<samp class="samp">pentium4</samp>’</dt>
|
|
<dt>‘<samp class="samp">k6</samp>’</dt>
|
|
<dt>‘<samp class="samp">k62</samp>’</dt>
|
|
<dt>‘<samp class="samp">athlon</samp>’</dt>
|
|
<dt>‘<samp class="samp">athlonxp</samp>’</dt>
|
|
<dt>‘<samp class="samp">k8</samp>’</dt>
|
|
</dl>
|
|
</dd>
|
|
</dl>
|
|
|
|
</dd>
|
|
<dt><samp class="option">-cpucount <var class="var">count</var> (<em class="emph">global</em>)</samp></dt>
|
|
<dd><p>Override detection of CPU count. This option is intended
|
|
for testing. Do not use it unless you know what you’re doing.
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg -cpucount 2
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><samp class="option">-max_alloc <var class="var">bytes</var></samp></dt>
|
|
<dd><p>Set the maximum size limit for allocating a block on the heap by ffmpeg’s
|
|
family of malloc functions. Exercise <strong class="strong">extreme caution</strong> when using
|
|
this option. Don’t use if you do not understand the full consequence of doing so.
|
|
Default is INT_MAX.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</div>
|
|
<div class="section-level-extent" id="AVOptions">
|
|
<h3 class="section">3.3 AVOptions</h3>
|
|
|
|
<p>These options are provided directly by the libavformat, libavdevice and
|
|
libavcodec libraries. To see the list of available AVOptions, use the
|
|
<samp class="option">-help</samp> option. They are separated into two categories:
|
|
</p><dl class="table">
|
|
<dt><samp class="option">generic</samp></dt>
|
|
<dd><p>These options can be set for any container, codec or device. Generic options
|
|
are listed under AVFormatContext options for containers/devices and under
|
|
AVCodecContext options for codecs.
|
|
</p></dd>
|
|
<dt><samp class="option">private</samp></dt>
|
|
<dd><p>These options are specific to the given container, device or codec. Private
|
|
options are listed under their corresponding containers/devices/codecs.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>For example to write an ID3v2.3 header instead of a default ID3v2.4 to
|
|
an MP3 file, use the <samp class="option">id3v2_version</samp> private option of the MP3
|
|
muxer:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg -i input.flac -id3v2_version 3 out.mp3
|
|
</pre></div>
|
|
|
|
<p>All codec AVOptions are per-stream, and thus a stream specifier
|
|
should be attached to them:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffmpeg -i multichannel.mxf -map 0:v:0 -map 0:a:0 -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:1 2 -c:a:1 aac -b:2 128k out.mp4
|
|
</pre></div>
|
|
|
|
<p>In the above example, a multichannel audio stream is mapped twice for output.
|
|
The first instance is encoded with codec ac3 and bitrate 640k.
|
|
The second instance is downmixed to 2 channels and encoded with codec aac. A bitrate of 128k is specified for it using
|
|
absolute index of the output stream.
|
|
</p>
|
|
<p>Note: the <samp class="option">-nooption</samp> syntax cannot be used for boolean
|
|
AVOptions, use <samp class="option">-option 0</samp>/<samp class="option">-option 1</samp>.
|
|
</p>
|
|
<p>Note: the old undocumented way of specifying per-stream AVOptions by
|
|
prepending v/a/s to the options name is now obsolete and will be
|
|
removed soon.
|
|
</p>
|
|
</div>
|
|
<div class="section-level-extent" id="Main-options">
|
|
<h3 class="section">3.4 Main options</h3>
|
|
|
|
<dl class="table">
|
|
<dt><samp class="option">-f <var class="var">format</var></samp></dt>
|
|
<dd><p>Force format to use.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-unit</samp></dt>
|
|
<dd><p>Show the unit of the displayed values.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-prefix</samp></dt>
|
|
<dd><p>Use SI prefixes for the displayed values.
|
|
Unless the "-byte_binary_prefix" option is used all the prefixes
|
|
are decimal.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-byte_binary_prefix</samp></dt>
|
|
<dd><p>Force the use of binary prefixes for byte values.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-sexagesimal</samp></dt>
|
|
<dd><p>Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-pretty</samp></dt>
|
|
<dd><p>Prettify the format of the displayed values, it corresponds to the
|
|
options "-unit -prefix -byte_binary_prefix -sexagesimal".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-of, -print_format <var class="var">writer_name</var>[=<var class="var">writer_options</var>]</samp></dt>
|
|
<dd><p>Set the output printing format.
|
|
</p>
|
|
<p><var class="var">writer_name</var> specifies the name of the writer, and
|
|
<var class="var">writer_options</var> specifies the options to be passed to the writer.
|
|
</p>
|
|
<p>For example for printing the output in JSON format, specify:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">-print_format json
|
|
</pre></div>
|
|
|
|
<p>For more details on the available output printing formats, see the
|
|
Writers section below.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-sections</samp></dt>
|
|
<dd><p>Print sections structure and section information, and exit. The output
|
|
is not meant to be parsed by a machine.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-select_streams <var class="var">stream_specifier</var></samp></dt>
|
|
<dd><p>Select only the streams specified by <var class="var">stream_specifier</var>. This
|
|
option affects only the options related to streams
|
|
(e.g. <code class="code">show_streams</code>, <code class="code">show_packets</code>, etc.).
|
|
</p>
|
|
<p>For example to show only audio streams, you can use the command:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffprobe -show_streams -select_streams a INPUT
|
|
</pre></div>
|
|
|
|
<p>To show only video packets belonging to the video stream with index 1:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">ffprobe -show_packets -select_streams v:1 INPUT
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><samp class="option">-show_data</samp></dt>
|
|
<dd><p>Show payload data, as a hexadecimal and ASCII dump. Coupled with
|
|
<samp class="option">-show_packets</samp>, it will dump the packets’ data. Coupled with
|
|
<samp class="option">-show_streams</samp>, it will dump the codec extradata.
|
|
</p>
|
|
<p>The dump is printed as the "data" field. It may contain newlines.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_data_hash <var class="var">algorithm</var></samp></dt>
|
|
<dd><p>Show a hash of payload data, for packets with <samp class="option">-show_packets</samp> and for
|
|
codec extradata with <samp class="option">-show_streams</samp>.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_error</samp></dt>
|
|
<dd><p>Show information about the error found when trying to probe the input.
|
|
</p>
|
|
<p>The error information is printed within a section with name "ERROR".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_format</samp></dt>
|
|
<dd><p>Show information about the container format of the input multimedia
|
|
stream.
|
|
</p>
|
|
<p>All the container format information is printed within a section with
|
|
name "FORMAT".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_format_entry <var class="var">name</var></samp></dt>
|
|
<dd><p>Like <samp class="option">-show_format</samp>, but only prints the specified entry of the
|
|
container format information, rather than all. This option may be given more
|
|
than once, then all specified entries will be shown.
|
|
</p>
|
|
<p>This option is deprecated, use <code class="code">show_entries</code> instead.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_entries <var class="var">section_entries</var></samp></dt>
|
|
<dd><p>Set list of entries to show.
|
|
</p>
|
|
<p>Entries are specified according to the following
|
|
syntax. <var class="var">section_entries</var> contains a list of section entries
|
|
separated by <code class="code">:</code>. Each section entry is composed by a section
|
|
name (or unique name), optionally followed by a list of entries local
|
|
to that section, separated by <code class="code">,</code>.
|
|
</p>
|
|
<p>If section name is specified but is followed by no <code class="code">=</code>, all
|
|
entries are printed to output, together with all the contained
|
|
sections. Otherwise only the entries specified in the local section
|
|
entries list are printed. In particular, if <code class="code">=</code> is specified but
|
|
the list of local entries is empty, then no entries will be shown for
|
|
that section.
|
|
</p>
|
|
<p>Note that the order of specification of the local section entries is
|
|
not honored in the output, and the usual display order will be
|
|
retained.
|
|
</p>
|
|
<p>The formal syntax is given by:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted"><var class="var">LOCAL_SECTION_ENTRIES</var> ::= <var class="var">SECTION_ENTRY_NAME</var>[,<var class="var">LOCAL_SECTION_ENTRIES</var>]
|
|
<var class="var">SECTION_ENTRY</var> ::= <var class="var">SECTION_NAME</var>[=[<var class="var">LOCAL_SECTION_ENTRIES</var>]]
|
|
<var class="var">SECTION_ENTRIES</var> ::= <var class="var">SECTION_ENTRY</var>[:<var class="var">SECTION_ENTRIES</var>]
|
|
</pre></div>
|
|
|
|
<p>For example, to show only the index and type of each stream, and the PTS
|
|
time, duration time, and stream index of the packets, you can specify
|
|
the argument:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">packet=pts_time,duration_time,stream_index : stream=index,codec_type
|
|
</pre></div>
|
|
|
|
<p>To show all the entries in the section "format", but only the codec
|
|
type in the section "stream", specify the argument:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">format : stream=codec_type
|
|
</pre></div>
|
|
|
|
<p>To show all the tags in the stream and format sections:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">stream_tags : format_tags
|
|
</pre></div>
|
|
|
|
<p>To show only the <code class="code">title</code> tag (if available) in the stream
|
|
sections:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">stream_tags=title
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><samp class="option">-show_packets</samp></dt>
|
|
<dd><p>Show information about each packet contained in the input multimedia
|
|
stream.
|
|
</p>
|
|
<p>The information for each single packet is printed within a dedicated
|
|
section with name "PACKET".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_frames</samp></dt>
|
|
<dd><p>Show information about each frame and subtitle contained in the input
|
|
multimedia stream.
|
|
</p>
|
|
<p>The information for each single frame is printed within a dedicated
|
|
section with name "FRAME" or "SUBTITLE".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_log <var class="var">loglevel</var></samp></dt>
|
|
<dd><p>Show logging information from the decoder about each frame according to
|
|
the value set in <var class="var">loglevel</var>, (see <code class="code">-loglevel</code>). This option requires <code class="code">-show_frames</code>.
|
|
</p>
|
|
<p>The information for each log message is printed within a dedicated
|
|
section with name "LOG".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_streams</samp></dt>
|
|
<dd><p>Show information about each media stream contained in the input
|
|
multimedia stream.
|
|
</p>
|
|
<p>Each media stream information is printed within a dedicated section
|
|
with name "STREAM".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_programs</samp></dt>
|
|
<dd><p>Show information about programs and their streams contained in the input
|
|
multimedia stream.
|
|
</p>
|
|
<p>Each media stream information is printed within a dedicated section
|
|
with name "PROGRAM_STREAM".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_chapters</samp></dt>
|
|
<dd><p>Show information about chapters stored in the format.
|
|
</p>
|
|
<p>Each chapter is printed within a dedicated section with name "CHAPTER".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-count_frames</samp></dt>
|
|
<dd><p>Count the number of frames per stream and report it in the
|
|
corresponding stream section.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-count_packets</samp></dt>
|
|
<dd><p>Count the number of packets per stream and report it in the
|
|
corresponding stream section.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-read_intervals <var class="var">read_intervals</var></samp></dt>
|
|
<dd>
|
|
<p>Read only the specified intervals. <var class="var">read_intervals</var> must be a
|
|
sequence of interval specifications separated by ",".
|
|
<code class="command">ffprobe</code> will seek to the interval starting point, and will
|
|
continue reading from that.
|
|
</p>
|
|
<p>Each interval is specified by two optional parts, separated by "%".
|
|
</p>
|
|
<p>The first part specifies the interval start position. It is
|
|
interpreted as an absolute position, or as a relative offset from the
|
|
current position if it is preceded by the "+" character. If this first
|
|
part is not specified, no seeking will be performed when reading this
|
|
interval.
|
|
</p>
|
|
<p>The second part specifies the interval end position. It is interpreted
|
|
as an absolute position, or as a relative offset from the current
|
|
position if it is preceded by the "+" character. If the offset
|
|
specification starts with "#", it is interpreted as the number of
|
|
packets to read (not including the flushing packets) from the interval
|
|
start. If no second part is specified, the program will read until the
|
|
end of the input.
|
|
</p>
|
|
<p>Note that seeking is not accurate, thus the actual interval start
|
|
point may be different from the specified position. Also, when an
|
|
interval duration is specified, the absolute end time will be computed
|
|
by adding the duration to the interval start point found by seeking
|
|
the file, rather than to the specified start value.
|
|
</p>
|
|
<p>The formal syntax is given by:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted"><var class="var">INTERVAL</var> ::= [<var class="var">START</var>|+<var class="var">START_OFFSET</var>][%[<var class="var">END</var>|+<var class="var">END_OFFSET</var>]]
|
|
<var class="var">INTERVALS</var> ::= <var class="var">INTERVAL</var>[,<var class="var">INTERVALS</var>]
|
|
</pre></div>
|
|
|
|
<p>A few examples follow.
|
|
</p><ul class="itemize mark-bullet">
|
|
<li>Seek to time 10, read packets until 20 seconds after the found seek
|
|
point, then seek to position <code class="code">01:30</code> (1 minute and thirty
|
|
seconds) and read packets until position <code class="code">01:45</code>.
|
|
<div class="example">
|
|
<pre class="example-preformatted">10%+20,01:30%01:45
|
|
</pre></div>
|
|
|
|
</li><li>Read only 42 packets after seeking to position <code class="code">01:23</code>:
|
|
<div class="example">
|
|
<pre class="example-preformatted">01:23%+#42
|
|
</pre></div>
|
|
|
|
</li><li>Read only the first 20 seconds from the start:
|
|
<div class="example">
|
|
<pre class="example-preformatted">%+20
|
|
</pre></div>
|
|
|
|
</li><li>Read from the start until position <code class="code">02:30</code>:
|
|
<div class="example">
|
|
<pre class="example-preformatted">%02:30
|
|
</pre></div>
|
|
</li></ul>
|
|
|
|
</dd>
|
|
<dt><samp class="option">-show_private_data, -private</samp></dt>
|
|
<dd><p>Show private data, that is data depending on the format of the
|
|
particular shown element.
|
|
This option is enabled by default, but you may need to disable it
|
|
for specific uses, for example when creating XSD-compliant XML output.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_program_version</samp></dt>
|
|
<dd><p>Show information related to program version.
|
|
</p>
|
|
<p>Version information is printed within a section with name
|
|
"PROGRAM_VERSION".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_library_versions</samp></dt>
|
|
<dd><p>Show information related to library versions.
|
|
</p>
|
|
<p>Version information for each library is printed within a section with
|
|
name "LIBRARY_VERSION".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_versions</samp></dt>
|
|
<dd><p>Show information related to program and library versions. This is the
|
|
equivalent of setting both <samp class="option">-show_program_version</samp> and
|
|
<samp class="option">-show_library_versions</samp> options.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_pixel_formats</samp></dt>
|
|
<dd><p>Show information about all pixel formats supported by FFmpeg.
|
|
</p>
|
|
<p>Pixel format information for each format is printed within a section
|
|
with name "PIXEL_FORMAT".
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-show_optional_fields <var class="var">value</var></samp></dt>
|
|
<dd><p>Some writers viz. JSON and XML, omit the printing of fields with invalid or non-applicable values,
|
|
while other writers always print them. This option enables one to control this behaviour.
|
|
Valid values are <code class="code">always</code>/<code class="code">1</code>, <code class="code">never</code>/<code class="code">0</code> and <code class="code">auto</code>/<code class="code">-1</code>.
|
|
Default is <var class="var">auto</var>.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-bitexact</samp></dt>
|
|
<dd><p>Force bitexact output, useful to produce output which is not dependent
|
|
on the specific build.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-i <var class="var">input_url</var></samp></dt>
|
|
<dd><p>Read <var class="var">input_url</var>.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">-o <var class="var">output_url</var></samp></dt>
|
|
<dd><p>Write output to <var class="var">output_url</var>. If not specified, the output is sent
|
|
to stdout.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
</div>
|
|
</div>
|
|
<div class="chapter-level-extent" id="Writers">
|
|
<h2 class="chapter">4 Writers</h2>
|
|
|
|
<p>A writer defines the output format adopted by <code class="command">ffprobe</code>, and will be
|
|
used for printing all the parts of the output.
|
|
</p>
|
|
<p>A writer may accept one or more arguments, which specify the options
|
|
to adopt. The options are specified as a list of <var class="var">key</var>=<var class="var">value</var>
|
|
pairs, separated by ":".
|
|
</p>
|
|
<p>All writers support the following options:
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">string_validation, sv</samp></dt>
|
|
<dd><p>Set string validation mode.
|
|
</p>
|
|
<p>The following values are accepted.
|
|
</p><dl class="table">
|
|
<dt>‘<samp class="samp">fail</samp>’</dt>
|
|
<dd><p>The writer will fail immediately in case an invalid string (UTF-8)
|
|
sequence or code point is found in the input. This is especially
|
|
useful to validate input metadata.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">ignore</samp>’</dt>
|
|
<dd><p>Any validation error will be ignored. This will result in possibly
|
|
broken output, especially with the json or xml writer.
|
|
</p>
|
|
</dd>
|
|
<dt>‘<samp class="samp">replace</samp>’</dt>
|
|
<dd><p>The writer will substitute invalid UTF-8 sequences or code points with
|
|
the string specified with the <samp class="option">string_validation_replacement</samp>.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>Default value is ‘<samp class="samp">replace</samp>’.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">string_validation_replacement, svr</samp></dt>
|
|
<dd><p>Set replacement string to use in case <samp class="option">string_validation</samp> is
|
|
set to ‘<samp class="samp">replace</samp>’.
|
|
</p>
|
|
<p>In case the option is not specified, the writer will assume the empty
|
|
string, that is it will remove the invalid sequences from the input
|
|
strings.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>A description of the currently available writers follows.
|
|
</p>
|
|
<ul class="mini-toc">
|
|
<li><a href="#default" accesskey="1">default</a></li>
|
|
<li><a href="#compact_002c-csv" accesskey="2">compact, csv</a></li>
|
|
<li><a href="#flat" accesskey="3">flat</a></li>
|
|
<li><a href="#ini" accesskey="4">ini</a></li>
|
|
<li><a href="#json" accesskey="5">json</a></li>
|
|
<li><a href="#xml" accesskey="6">xml</a></li>
|
|
</ul>
|
|
<div class="section-level-extent" id="default">
|
|
<h3 class="section">4.1 default</h3>
|
|
<p>Default format.
|
|
</p>
|
|
<p>Print each section in the form:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">[SECTION]
|
|
key1=val1
|
|
...
|
|
keyN=valN
|
|
[/SECTION]
|
|
</pre></div>
|
|
|
|
<p>Metadata tags are printed as a line in the corresponding FORMAT, STREAM or
|
|
PROGRAM_STREAM section, and are prefixed by the string "TAG:".
|
|
</p>
|
|
<p>A description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">nokey, nk</samp></dt>
|
|
<dd><p>If set to 1 specify not to print the key of each field. Default value
|
|
is 0.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">noprint_wrappers, nw</samp></dt>
|
|
<dd><p>If set to 1 specify not to print the section header and footer.
|
|
Default value is 0.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</div>
|
|
<div class="section-level-extent" id="compact_002c-csv">
|
|
<h3 class="section">4.2 compact, csv</h3>
|
|
<p>Compact and CSV format.
|
|
</p>
|
|
<p>The <code class="code">csv</code> writer is equivalent to <code class="code">compact</code>, but supports
|
|
different defaults.
|
|
</p>
|
|
<p>Each section is printed on a single line.
|
|
If no option is specified, the output has the form:
|
|
</p><div class="example">
|
|
<pre class="example-preformatted">section|key1=val1| ... |keyN=valN
|
|
</pre></div>
|
|
|
|
<p>Metadata tags are printed in the corresponding "format" or "stream"
|
|
section. A metadata tag key, if printed, is prefixed by the string
|
|
"tag:".
|
|
</p>
|
|
<p>The description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">item_sep, s</samp></dt>
|
|
<dd><p>Specify the character to use for separating fields in the output line.
|
|
It must be a single printable character, it is "|" by default ("," for
|
|
the <code class="code">csv</code> writer).
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">nokey, nk</samp></dt>
|
|
<dd><p>If set to 1 specify not to print the key of each field. Its default
|
|
value is 0 (1 for the <code class="code">csv</code> writer).
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">escape, e</samp></dt>
|
|
<dd><p>Set the escape mode to use, default to "c" ("csv" for the <code class="code">csv</code>
|
|
writer).
|
|
</p>
|
|
<p>It can assume one of the following values:
|
|
</p><dl class="table">
|
|
<dt><samp class="option">c</samp></dt>
|
|
<dd><p>Perform C-like escaping. Strings containing a newline (‘<samp class="samp">\n</samp>’), carriage
|
|
return (‘<samp class="samp">\r</samp>’), a tab (‘<samp class="samp">\t</samp>’), a form feed (‘<samp class="samp">\f</samp>’), the escaping
|
|
character (‘<samp class="samp">\</samp>’) or the item separator character <var class="var">SEP</var> are escaped
|
|
using C-like fashioned escaping, so that a newline is converted to the
|
|
sequence ‘<samp class="samp">\n</samp>’, a carriage return to ‘<samp class="samp">\r</samp>’, ‘<samp class="samp">\</samp>’ to ‘<samp class="samp">\\</samp>’ and
|
|
the separator <var class="var">SEP</var> is converted to ‘<samp class="samp">\<var class="var">SEP</var></samp>’.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">csv</samp></dt>
|
|
<dd><p>Perform CSV-like escaping, as described in RFC4180. Strings
|
|
containing a newline (‘<samp class="samp">\n</samp>’), a carriage return (‘<samp class="samp">\r</samp>’), a double quote
|
|
(‘<samp class="samp">"</samp>’), or <var class="var">SEP</var> are enclosed in double-quotes.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">none</samp></dt>
|
|
<dd><p>Perform no escaping.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</dd>
|
|
<dt><samp class="option">print_section, p</samp></dt>
|
|
<dd><p>Print the section name at the beginning of each line if the value is
|
|
<code class="code">1</code>, disable it with value set to <code class="code">0</code>. Default value is
|
|
<code class="code">1</code>.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
</div>
|
|
<div class="section-level-extent" id="flat">
|
|
<h3 class="section">4.3 flat</h3>
|
|
<p>Flat format.
|
|
</p>
|
|
<p>A free-form output where each line contains an explicit key=value, such as
|
|
"streams.stream.3.tags.foo=bar". The output is shell escaped, so it can be
|
|
directly embedded in sh scripts as long as the separator character is an
|
|
alphanumeric character or an underscore (see <var class="var">sep_char</var> option).
|
|
</p>
|
|
<p>The description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">sep_char, s</samp></dt>
|
|
<dd><p>Separator character used to separate the chapter, the section name, IDs and
|
|
potential tags in the printed field key.
|
|
</p>
|
|
<p>Default value is ‘<samp class="samp">.</samp>’.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">hierarchical, h</samp></dt>
|
|
<dd><p>Specify if the section name specification should be hierarchical. If
|
|
set to 1, and if there is more than one section in the current
|
|
chapter, the section name will be prefixed by the name of the
|
|
chapter. A value of 0 will disable this behavior.
|
|
</p>
|
|
<p>Default value is 1.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</div>
|
|
<div class="section-level-extent" id="ini">
|
|
<h3 class="section">4.4 ini</h3>
|
|
<p>INI format output.
|
|
</p>
|
|
<p>Print output in an INI based format.
|
|
</p>
|
|
<p>The following conventions are adopted:
|
|
</p>
|
|
<ul class="itemize mark-bullet">
|
|
<li>all key and values are UTF-8
|
|
</li><li>‘<samp class="samp">.</samp>’ is the subgroup separator
|
|
</li><li>newline, ‘<samp class="samp">\t</samp>’, ‘<samp class="samp">\f</samp>’, ‘<samp class="samp">\b</samp>’ and the following characters are
|
|
escaped
|
|
</li><li>‘<samp class="samp">\</samp>’ is the escape character
|
|
</li><li>‘<samp class="samp">#</samp>’ is the comment indicator
|
|
</li><li>‘<samp class="samp">=</samp>’ is the key/value separator
|
|
</li><li>‘<samp class="samp">:</samp>’ is not used but usually parsed as key/value separator
|
|
</li></ul>
|
|
|
|
<p>This writer accepts options as a list of <var class="var">key</var>=<var class="var">value</var> pairs,
|
|
separated by ‘<samp class="samp">:</samp>’.
|
|
</p>
|
|
<p>The description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">hierarchical, h</samp></dt>
|
|
<dd><p>Specify if the section name specification should be hierarchical. If
|
|
set to 1, and if there is more than one section in the current
|
|
chapter, the section name will be prefixed by the name of the
|
|
chapter. A value of 0 will disable this behavior.
|
|
</p>
|
|
<p>Default value is 1.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
</div>
|
|
<div class="section-level-extent" id="json">
|
|
<h3 class="section">4.5 json</h3>
|
|
<p>JSON based format.
|
|
</p>
|
|
<p>Each section is printed using JSON notation.
|
|
</p>
|
|
<p>The description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">compact, c</samp></dt>
|
|
<dd><p>If set to 1 enable compact output, that is each section will be
|
|
printed on a single line. Default value is 0.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>For more information about JSON, see <a class="url" href="http://www.json.org/">http://www.json.org/</a>.
|
|
</p>
|
|
</div>
|
|
<div class="section-level-extent" id="xml">
|
|
<h3 class="section">4.6 xml</h3>
|
|
<p>XML based format.
|
|
</p>
|
|
<p>The XML output is described in the XML schema description file
|
|
<samp class="file">ffprobe.xsd</samp> installed in the FFmpeg datadir.
|
|
</p>
|
|
<p>An updated version of the schema can be retrieved at the url
|
|
<a class="url" href="http://www.ffmpeg.org/schema/ffprobe.xsd">http://www.ffmpeg.org/schema/ffprobe.xsd</a>, which redirects to the
|
|
latest schema committed into the FFmpeg development source code tree.
|
|
</p>
|
|
<p>Note that the output issued will be compliant to the
|
|
<samp class="file">ffprobe.xsd</samp> schema only when no special global output options
|
|
(<samp class="option">unit</samp>, <samp class="option">prefix</samp>, <samp class="option">byte_binary_prefix</samp>,
|
|
<samp class="option">sexagesimal</samp> etc.) are specified.
|
|
</p>
|
|
<p>The description of the accepted options follows.
|
|
</p>
|
|
<dl class="table">
|
|
<dt><samp class="option">fully_qualified, q</samp></dt>
|
|
<dd><p>If set to 1 specify if the output should be fully qualified. Default
|
|
value is 0.
|
|
This is required for generating an XML file which can be validated
|
|
through an XSD file.
|
|
</p>
|
|
</dd>
|
|
<dt><samp class="option">xsd_strict, x</samp></dt>
|
|
<dd><p>If set to 1 perform more checks for ensuring that the output is XSD
|
|
compliant. Default value is 0.
|
|
This option automatically sets <samp class="option">fully_qualified</samp> to 1.
|
|
</p></dd>
|
|
</dl>
|
|
|
|
<p>For more information about the XML format, see
|
|
<a class="url" href="https://www.w3.org/XML/">https://www.w3.org/XML/</a>.
|
|
</p>
|
|
</div>
|
|
</div>
|
|
<div class="chapter-level-extent" id="Timecode">
|
|
<h2 class="chapter">5 Timecode</h2>
|
|
|
|
<p><code class="command">ffprobe</code> supports Timecode extraction:
|
|
</p>
|
|
<ul class="itemize mark-bullet">
|
|
<li>MPEG1/2 timecode is extracted from the GOP, and is available in the video
|
|
stream details (<samp class="option">-show_streams</samp>, see <var class="var">timecode</var>).
|
|
|
|
</li><li>MOV timecode is extracted from tmcd track, so is available in the tmcd
|
|
stream metadata (<samp class="option">-show_streams</samp>, see <var class="var">TAG:timecode</var>).
|
|
|
|
</li><li>DV, GXF and AVI timecodes are available in format metadata
|
|
(<samp class="option">-show_format</samp>, see <var class="var">TAG:timecode</var>).
|
|
|
|
</li></ul>
|
|
|
|
|
|
</div>
|
|
<div class="chapter-level-extent" id="See-Also">
|
|
<h2 class="chapter">6 See Also</h2>
|
|
|
|
<p><a class="url" href="ffprobe-all.html">ffprobe-all</a>,
|
|
<a class="url" href="ffmpeg.html">ffmpeg</a>, <a class="url" href="ffplay.html">ffplay</a>,
|
|
<a class="url" href="ffmpeg-utils.html">ffmpeg-utils</a>,
|
|
<a class="url" href="ffmpeg-scaler.html">ffmpeg-scaler</a>,
|
|
<a class="url" href="ffmpeg-resampler.html">ffmpeg-resampler</a>,
|
|
<a class="url" href="ffmpeg-codecs.html">ffmpeg-codecs</a>,
|
|
<a class="url" href="ffmpeg-bitstream-filters.html">ffmpeg-bitstream-filters</a>,
|
|
<a class="url" href="ffmpeg-formats.html">ffmpeg-formats</a>,
|
|
<a class="url" href="ffmpeg-devices.html">ffmpeg-devices</a>,
|
|
<a class="url" href="ffmpeg-protocols.html">ffmpeg-protocols</a>,
|
|
<a class="url" href="ffmpeg-filters.html">ffmpeg-filters</a>
|
|
</p>
|
|
|
|
</div>
|
|
<div class="chapter-level-extent" id="Authors">
|
|
<h2 class="chapter">7 Authors</h2>
|
|
|
|
<p>The FFmpeg developers.
|
|
</p>
|
|
<p>For details about the authorship, see the Git history of the project
|
|
(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command
|
|
<code class="command">git log</code> in the FFmpeg source directory, or browsing the
|
|
online repository at <a class="url" href="https://git.ffmpeg.org/ffmpeg">https://git.ffmpeg.org/ffmpeg</a>.
|
|
</p>
|
|
<p>Maintainers for the specific components are listed in the file
|
|
<samp class="file">MAINTAINERS</samp> in the source code tree.
|
|
</p>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
|
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</body>
|
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</html>
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