mirror of
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1001 lines
34 KiB
Plaintext
1001 lines
34 KiB
Plaintext
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FFPROBE(1) FFPROBE(1)
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NAME
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ffprobe - ffprobe media prober
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SYNOPSIS
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ffprobe [options] input_url
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DESCRIPTION
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ffprobe gathers information from multimedia streams and prints it in
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human- and machine-readable fashion.
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For example it can be used to check the format of the container used by
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a multimedia stream and the format and type of each media stream
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contained in it.
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If a url is specified in input, ffprobe will try to open and probe the
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url content. If the url cannot be opened or recognized as a multimedia
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file, a positive exit code is returned.
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If no output is specified as output with o ffprobe will write to
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stdout.
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ffprobe may be employed both as a standalone application or in
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combination with a textual filter, which may perform more sophisticated
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processing, e.g. statistical processing or plotting.
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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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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 output_format option.
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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 name. See
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the output of sections.
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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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OPTIONS
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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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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: 'KB',
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'MiB', 'G' and 'B' as number suffixes.
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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 the
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option name with "no". For example using "-nofoo" will set the boolean
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option with name "foo" to false.
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Options that take arguments support a special syntax where the argument
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given on the command line is interpreted as a path to the file from
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which the actual argument value is loaded. To use this feature, add a
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forward slash '/' immediately before the option name (after the leading
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dash). E.g.
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ffmpeg -i INPUT -/filter:v filter.script OUTPUT
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will load a filtergraph description from the file named filter.script.
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Stream specifiers
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Some options are applied per-stream, e.g. bitrate or codec. Stream
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specifiers are used to precisely specify which stream(s) a given option
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belongs to.
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A stream specifier is a string generally appended to the option name
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and separated from it by a colon. E.g. "-codec:a:1 ac3" contains the
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"a:1" stream specifier, which matches the second audio stream.
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Therefore, it would select the ac3 codec for the second audio stream.
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A stream specifier can match several streams, so that the option is
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applied to all of them. E.g. the stream specifier in "-b:a 128k"
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matches all audio streams.
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An empty stream specifier matches all streams. For example, "-codec
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copy" or "-codec: copy" would copy all the streams without reencoding.
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Possible forms of stream specifiers are:
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stream_index
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Matches the stream with this index. E.g. "-threads:1 4" would set
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the thread count for the second stream to 4. If stream_index is
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used as an additional stream specifier (see below), then it selects
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stream number stream_index from the matching streams. Stream
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numbering is based on the order of the streams as detected by
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libavformat except when a stream group specifier or program ID is
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also specified. In this case it is based on the ordering of the
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streams in the group or program.
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stream_type[:additional_stream_specifier]
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stream_type is one of following: 'v' or 'V' for video, 'a' for
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audio, 's' for subtitle, 'd' for data, and 't' for attachments. 'v'
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matches all video streams, 'V' only matches video streams which are
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not attached pictures, video thumbnails or cover arts. If
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additional_stream_specifier is used, then it matches streams which
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both have this type and match the additional_stream_specifier.
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Otherwise, it matches all streams of the specified type.
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g:group_specifier[:additional_stream_specifier]
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Matches streams which are in the group with the specifier
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group_specifier. if additional_stream_specifier is used, then it
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matches streams which both are part of the group and match the
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additional_stream_specifier. group_specifier may be one of the
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following:
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group_index
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Match the stream with this group index.
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#group_id or i:group_id
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Match the stream with this group id.
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p:program_id[:additional_stream_specifier]
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Matches streams which are in the program with the id program_id. If
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additional_stream_specifier is used, then it matches streams which
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both are part of the program and match the
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additional_stream_specifier.
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#stream_id or i:stream_id
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Match the stream by stream id (e.g. PID in MPEG-TS container).
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m:key[:value]
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Matches streams with the metadata tag key having the specified
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value. If value is not given, matches streams that contain the
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given tag with any value.
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u Matches streams with usable configuration, the codec must be
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defined and the essential information such as video dimension or
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audio sample rate must be present.
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Note that in ffmpeg, matching by metadata will only work properly
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for input files.
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Generic options
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These options are shared amongst the ff* tools.
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-L Show license.
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-h, -?, -help, --help [arg]
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Show help. An optional parameter may be specified to print help
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about a specific item. If no argument is specified, only basic (non
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advanced) tool options are shown.
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Possible values of arg are:
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long
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Print advanced tool options in addition to the basic tool
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options.
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full
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Print complete list of options, including shared and private
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options for encoders, decoders, demuxers, muxers, filters, etc.
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decoder=decoder_name
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Print detailed information about the decoder named
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decoder_name. Use the -decoders option to get a list of all
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decoders.
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encoder=encoder_name
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Print detailed information about the encoder named
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encoder_name. Use the -encoders option to get a list of all
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encoders.
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demuxer=demuxer_name
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Print detailed information about the demuxer named
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demuxer_name. Use the -formats option to get a list of all
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demuxers and muxers.
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muxer=muxer_name
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Print detailed information about the muxer named muxer_name.
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Use the -formats option to get a list of all muxers and
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demuxers.
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filter=filter_name
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Print detailed information about the filter named filter_name.
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Use the -filters option to get a list of all filters.
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bsf=bitstream_filter_name
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Print detailed information about the bitstream filter named
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bitstream_filter_name. Use the -bsfs option to get a list of
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all bitstream filters.
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protocol=protocol_name
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Print detailed information about the protocol named
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protocol_name. Use the -protocols option to get a list of all
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protocols.
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-version
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Show version.
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-buildconf
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Show the build configuration, one option per line.
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-formats
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Show available formats (including devices).
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-demuxers
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Show available demuxers.
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-muxers
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Show available muxers.
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-devices
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Show available devices.
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-codecs
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Show all codecs known to libavcodec.
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Note that the term 'codec' is used throughout this documentation as
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a shortcut for what is more correctly called a media bitstream
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format.
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-decoders
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Show available decoders.
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-encoders
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Show all available encoders.
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-bsfs
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Show available bitstream filters.
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-protocols
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Show available protocols.
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-filters
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Show available libavfilter filters.
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-pix_fmts
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Show available pixel formats.
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-sample_fmts
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Show available sample formats.
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-layouts
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Show channel names and standard channel layouts.
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-dispositions
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Show stream dispositions.
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-colors
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Show recognized color names.
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-sources device[,opt1=val1[,opt2=val2]...]
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Show autodetected sources of the input device. Some devices may
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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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ffmpeg -sources pulse,server=192.168.0.4
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-sinks device[,opt1=val1[,opt2=val2]...]
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Show autodetected sinks of the output device. Some devices may
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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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ffmpeg -sinks pulse,server=192.168.0.4
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-loglevel [flags+]loglevel | -v [flags+]loglevel
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Set logging level and flags used by the library.
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The optional flags prefix can consist of the following values:
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repeat
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Indicates that repeated log output should not be compressed to
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the first line and the "Last message repeated n times" line
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will be omitted.
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level
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Indicates that log output should add a "[level]" prefix to each
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message line. This can be used as an alternative to log
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coloring, e.g. when dumping the log to file.
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Flags can also be used alone by adding a '+'/'-' prefix to
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set/reset a single flag without affecting other flags or changing
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loglevel. When setting both flags and loglevel, a '+' separator is
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expected between the last flags value and before loglevel.
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loglevel is a string or a number containing one of the following
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values:
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quiet, -8
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Show nothing at all; be silent.
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panic, 0
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Only show fatal errors which could lead the process to crash,
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such as an assertion failure. This is not currently used for
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anything.
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fatal, 8
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Only show fatal errors. These are errors after which the
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process absolutely cannot continue.
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error, 16
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Show all errors, including ones which can be recovered from.
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warning, 24
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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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info, 32
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Show informative messages during processing. This is in
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addition to warnings and errors. This is the default value.
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verbose, 40
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Same as "info", except more verbose.
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debug, 48
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Show everything, including debugging information.
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trace, 56
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For example to enable repeated log output, add the "level" prefix,
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and set loglevel to "verbose":
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ffmpeg -loglevel repeat+level+verbose -i input output
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Another example that enables repeated log output without affecting
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current state of "level" prefix flag or loglevel:
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ffmpeg [...] -loglevel +repeat
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By default the program logs to stderr. If coloring is supported by
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the terminal, colors are used to mark errors and warnings. Log
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coloring can be disabled setting the environment variable
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AV_LOG_FORCE_NOCOLOR, or can be forced setting the environment
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variable AV_LOG_FORCE_COLOR.
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-report
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Dump full command line and log output to a file named
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"program-YYYYMMDD-HHMMSS.log" in the current directory. This file
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can be useful for bug reports. It also implies "-loglevel debug".
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Setting the environment variable FFREPORT to any value has the same
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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
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they contain special characters or the options delimiter ':' (see
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the ``Quoting and escaping'' section in the ffmpeg-utils manual).
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The following options are recognized:
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file
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set the file name to use for the report; %p is expanded to the
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name of the program, %t is expanded to a timestamp, "%%" is
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expanded to a plain "%"
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level
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set the log verbosity level using a numerical value (see
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"-loglevel").
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For example, to output a report to a file named ffreport.log using
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a log level of 32 (alias for log level "info"):
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FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output
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Errors in parsing the environment variable are not fatal, and will
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not appear in the report.
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-hide_banner
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Suppress printing banner.
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All FFmpeg tools will normally show a copyright notice, build
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options and library versions. This option can be used to suppress
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printing this information.
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-cpuflags flags (global)
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Allows setting and clearing cpu flags. This option is intended for
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testing. Do not use it unless you know what you're doing.
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ffmpeg -cpuflags -sse+mmx ...
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ffmpeg -cpuflags mmx ...
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ffmpeg -cpuflags 0 ...
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Possible flags for this option are:
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x86
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mmx
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mmxext
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sse
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sse2
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sse2slow
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sse3
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sse3slow
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ssse3
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atom
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sse4.1
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sse4.2
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avx
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avx2
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xop
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fma3
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fma4
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3dnow
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3dnowext
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bmi1
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bmi2
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cmov
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ARM
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armv5te
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armv6
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armv6t2
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vfp
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vfpv3
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neon
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setend
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AArch64
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armv8
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vfp
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neon
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PowerPC
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altivec
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Specific Processors
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pentium2
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pentium3
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pentium4
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k6
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k62
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athlon
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athlonxp
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k8
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-cpucount count (global)
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Override detection of CPU count. This option is intended for
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testing. Do not use it unless you know what you're doing.
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ffmpeg -cpucount 2
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-max_alloc bytes
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Set the maximum size limit for allocating a block on the heap by
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ffmpeg's family of malloc functions. Exercise extreme caution when
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using this option. Don't use if you do not understand the full
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consequence of doing so. Default is INT_MAX.
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AVOptions
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These options are provided directly by the libavformat, libavdevice and
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libavcodec libraries. To see the list of available AVOptions, use the
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-help option. They are separated into two categories:
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generic
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These options can be set for any container, codec or device.
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Generic options are listed under AVFormatContext options for
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containers/devices and under AVCodecContext options for codecs.
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private
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These options are specific to the given container, device or codec.
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Private options are listed under their corresponding
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containers/devices/codecs.
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For example to write an ID3v2.3 header instead of a default ID3v2.4 to
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an MP3 file, use the id3v2_version private option of the MP3 muxer:
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ffmpeg -i input.flac -id3v2_version 3 out.mp3
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All codec AVOptions are per-stream, and thus a stream specifier should
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be attached to them:
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||
|
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
|
||
|
|
||
|
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.
|
||
|
|
||
|
Note: the -nooption syntax cannot be used for boolean AVOptions, use
|
||
|
-option 0/-option 1.
|
||
|
|
||
|
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.
|
||
|
|
||
|
Main options
|
||
|
-f format
|
||
|
Force format to use.
|
||
|
|
||
|
-unit
|
||
|
Show the unit of the displayed values.
|
||
|
|
||
|
-prefix
|
||
|
Use SI prefixes for the displayed values. Unless the
|
||
|
"-byte_binary_prefix" option is used all the prefixes are decimal.
|
||
|
|
||
|
-byte_binary_prefix
|
||
|
Force the use of binary prefixes for byte values.
|
||
|
|
||
|
-sexagesimal
|
||
|
Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
|
||
|
|
||
|
-pretty
|
||
|
Prettify the format of the displayed values, it corresponds to the
|
||
|
options "-unit -prefix -byte_binary_prefix -sexagesimal".
|
||
|
|
||
|
-output_format, -of, -print_format writer_name[=writer_options]
|
||
|
Set the output printing format.
|
||
|
|
||
|
writer_name specifies the name of the writer, and writer_options
|
||
|
specifies the options to be passed to the writer.
|
||
|
|
||
|
For example for printing the output in JSON format, specify:
|
||
|
|
||
|
-output_format json
|
||
|
|
||
|
For more details on the available output printing formats, see the
|
||
|
Writers section below.
|
||
|
|
||
|
-sections
|
||
|
Print sections structure and section information, and exit. The
|
||
|
output is not meant to be parsed by a machine.
|
||
|
|
||
|
-select_streams stream_specifier
|
||
|
Select only the streams specified by stream_specifier. This option
|
||
|
affects only the options related to streams (e.g. "show_streams",
|
||
|
"show_packets", etc.).
|
||
|
|
||
|
For example to show only audio streams, you can use the command:
|
||
|
|
||
|
ffprobe -show_streams -select_streams a INPUT
|
||
|
|
||
|
To show only video packets belonging to the video stream with index
|
||
|
1:
|
||
|
|
||
|
ffprobe -show_packets -select_streams v:1 INPUT
|
||
|
|
||
|
-show_data
|
||
|
Show payload data, as a hexadecimal and ASCII dump. Coupled with
|
||
|
-show_packets, it will dump the packets' data. Coupled with
|
||
|
-show_streams, it will dump the codec extradata.
|
||
|
|
||
|
The dump is printed as the "data" field. It may contain newlines.
|
||
|
|
||
|
-show_data_hash algorithm
|
||
|
Show a hash of payload data, for packets with -show_packets and for
|
||
|
codec extradata with -show_streams.
|
||
|
|
||
|
-show_error
|
||
|
Show information about the error found when trying to probe the
|
||
|
input.
|
||
|
|
||
|
The error information is printed within a section with name
|
||
|
"ERROR".
|
||
|
|
||
|
-show_format
|
||
|
Show information about the container format of the input multimedia
|
||
|
stream.
|
||
|
|
||
|
All the container format information is printed within a section
|
||
|
with name "FORMAT".
|
||
|
|
||
|
-show_format_entry name
|
||
|
Like -show_format, 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.
|
||
|
|
||
|
This option is deprecated, use "show_entries" instead.
|
||
|
|
||
|
-show_entries section_entries
|
||
|
Set list of entries to show.
|
||
|
|
||
|
Entries are specified according to the following syntax.
|
||
|
section_entries contains a list of section entries separated by
|
||
|
":". 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 ",".
|
||
|
|
||
|
If section name is specified but is followed by no "=", 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 "=" is specified but the list
|
||
|
of local entries is empty, then no entries will be shown for that
|
||
|
section.
|
||
|
|
||
|
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.
|
||
|
|
||
|
The formal syntax is given by:
|
||
|
|
||
|
<LOCAL_SECTION_ENTRIES> ::= <SECTION_ENTRY_NAME>[,<LOCAL_SECTION_ENTRIES>]
|
||
|
<SECTION_ENTRY> ::= <SECTION_NAME>[=[<LOCAL_SECTION_ENTRIES>]]
|
||
|
<SECTION_ENTRIES> ::= <SECTION_ENTRY>[:<SECTION_ENTRIES>]
|
||
|
|
||
|
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:
|
||
|
|
||
|
packet=pts_time,duration_time,stream_index : stream=index,codec_type
|
||
|
|
||
|
To show all the entries in the section "format", but only the codec
|
||
|
type in the section "stream", specify the argument:
|
||
|
|
||
|
format : stream=codec_type
|
||
|
|
||
|
To show all the tags in the stream and format sections:
|
||
|
|
||
|
stream_tags : format_tags
|
||
|
|
||
|
To show only the "title" tag (if available) in the stream sections:
|
||
|
|
||
|
stream_tags=title
|
||
|
|
||
|
-show_packets
|
||
|
Show information about each packet contained in the input
|
||
|
multimedia stream.
|
||
|
|
||
|
The information for each single packet is printed within a
|
||
|
dedicated section with name "PACKET".
|
||
|
|
||
|
-show_frames
|
||
|
Show information about each frame and subtitle contained in the
|
||
|
input multimedia stream.
|
||
|
|
||
|
The information for each single frame is printed within a dedicated
|
||
|
section with name "FRAME" or "SUBTITLE".
|
||
|
|
||
|
-show_log loglevel
|
||
|
Show logging information from the decoder about each frame
|
||
|
according to the value set in loglevel, (see "-loglevel"). This
|
||
|
option requires "-show_frames".
|
||
|
|
||
|
The information for each log message is printed within a dedicated
|
||
|
section with name "LOG".
|
||
|
|
||
|
-show_streams
|
||
|
Show information about each media stream contained in the input
|
||
|
multimedia stream.
|
||
|
|
||
|
Each media stream information is printed within a dedicated section
|
||
|
with name "STREAM".
|
||
|
|
||
|
-show_programs
|
||
|
Show information about programs and their streams contained in the
|
||
|
input multimedia stream.
|
||
|
|
||
|
Each media stream information is printed within a dedicated section
|
||
|
with name "PROGRAM_STREAM".
|
||
|
|
||
|
-show_chapters
|
||
|
Show information about chapters stored in the format.
|
||
|
|
||
|
Each chapter is printed within a dedicated section with name
|
||
|
"CHAPTER".
|
||
|
|
||
|
-count_frames
|
||
|
Count the number of frames per stream and report it in the
|
||
|
corresponding stream section.
|
||
|
|
||
|
-count_packets
|
||
|
Count the number of packets per stream and report it in the
|
||
|
corresponding stream section.
|
||
|
|
||
|
-read_intervals read_intervals
|
||
|
Read only the specified intervals. read_intervals must be a
|
||
|
sequence of interval specifications separated by ",". ffprobe will
|
||
|
seek to the interval starting point, and will continue reading from
|
||
|
that.
|
||
|
|
||
|
Each interval is specified by two optional parts, separated by "%".
|
||
|
|
||
|
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.
|
||
|
|
||
|
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.
|
||
|
|
||
|
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.
|
||
|
|
||
|
The formal syntax is given by:
|
||
|
|
||
|
<INTERVAL> ::= [<START>|+<START_OFFSET>][%[<END>|+<END_OFFSET>]]
|
||
|
<INTERVALS> ::= <INTERVAL>[,<INTERVALS>]
|
||
|
|
||
|
A few examples follow.
|
||
|
|
||
|
o Seek to time 10, read packets until 20 seconds after the found
|
||
|
seek point, then seek to position "01:30" (1 minute and thirty
|
||
|
seconds) and read packets until position "01:45".
|
||
|
|
||
|
10%+20,01:30%01:45
|
||
|
|
||
|
o Read only 42 packets after seeking to position "01:23":
|
||
|
|
||
|
01:23%+#42
|
||
|
|
||
|
o Read only the first 20 seconds from the start:
|
||
|
|
||
|
%+20
|
||
|
|
||
|
o Read from the start until position "02:30":
|
||
|
|
||
|
%02:30
|
||
|
|
||
|
-show_private_data, -private
|
||
|
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.
|
||
|
|
||
|
-show_program_version
|
||
|
Show information related to program version.
|
||
|
|
||
|
Version information is printed within a section with name
|
||
|
"PROGRAM_VERSION".
|
||
|
|
||
|
-show_library_versions
|
||
|
Show information related to library versions.
|
||
|
|
||
|
Version information for each library is printed within a section
|
||
|
with name "LIBRARY_VERSION".
|
||
|
|
||
|
-show_versions
|
||
|
Show information related to program and library versions. This is
|
||
|
the equivalent of setting both -show_program_version and
|
||
|
-show_library_versions options.
|
||
|
|
||
|
-show_pixel_formats
|
||
|
Show information about all pixel formats supported by FFmpeg.
|
||
|
|
||
|
Pixel format information for each format is printed within a
|
||
|
section with name "PIXEL_FORMAT".
|
||
|
|
||
|
-show_optional_fields value
|
||
|
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 "always"/1, "never"/0 and "auto"/"-1". Default is auto.
|
||
|
|
||
|
-bitexact
|
||
|
Force bitexact output, useful to produce output which is not
|
||
|
dependent on the specific build.
|
||
|
|
||
|
-i input_url
|
||
|
Read input_url.
|
||
|
|
||
|
-o output_url
|
||
|
Write output to output_url. If not specified, the output is sent to
|
||
|
stdout.
|
||
|
|
||
|
WRITERS
|
||
|
A writer defines the output format adopted by ffprobe, and will be used
|
||
|
for printing all the parts of the output.
|
||
|
|
||
|
A writer may accept one or more arguments, which specify the options to
|
||
|
adopt. The options are specified as a list of key=value pairs,
|
||
|
separated by ":".
|
||
|
|
||
|
All writers support the following options:
|
||
|
|
||
|
string_validation, sv
|
||
|
Set string validation mode.
|
||
|
|
||
|
The following values are accepted.
|
||
|
|
||
|
fail
|
||
|
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.
|
||
|
|
||
|
ignore
|
||
|
Any validation error will be ignored. This will result in
|
||
|
possibly broken output, especially with the json or xml writer.
|
||
|
|
||
|
replace
|
||
|
The writer will substitute invalid UTF-8 sequences or code
|
||
|
points with the string specified with the
|
||
|
string_validation_replacement.
|
||
|
|
||
|
Default value is replace.
|
||
|
|
||
|
string_validation_replacement, svr
|
||
|
Set replacement string to use in case string_validation is set to
|
||
|
replace.
|
||
|
|
||
|
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.
|
||
|
|
||
|
A description of the currently available writers follows.
|
||
|
|
||
|
default
|
||
|
Default format.
|
||
|
|
||
|
Print each section in the form:
|
||
|
|
||
|
[SECTION]
|
||
|
key1=val1
|
||
|
...
|
||
|
keyN=valN
|
||
|
[/SECTION]
|
||
|
|
||
|
Metadata tags are printed as a line in the corresponding FORMAT, STREAM
|
||
|
or PROGRAM_STREAM section, and are prefixed by the string "TAG:".
|
||
|
|
||
|
A description of the accepted options follows.
|
||
|
|
||
|
nokey, nk
|
||
|
If set to 1 specify not to print the key of each field. Default
|
||
|
value is 0.
|
||
|
|
||
|
noprint_wrappers, nw
|
||
|
If set to 1 specify not to print the section header and footer.
|
||
|
Default value is 0.
|
||
|
|
||
|
compact, csv
|
||
|
Compact and CSV format.
|
||
|
|
||
|
The "csv" writer is equivalent to "compact", but supports different
|
||
|
defaults.
|
||
|
|
||
|
Each section is printed on a single line. If no option is specified,
|
||
|
the output has the form:
|
||
|
|
||
|
section|key1=val1| ... |keyN=valN
|
||
|
|
||
|
Metadata tags are printed in the corresponding "format" or "stream"
|
||
|
section. A metadata tag key, if printed, is prefixed by the string
|
||
|
"tag:".
|
||
|
|
||
|
The description of the accepted options follows.
|
||
|
|
||
|
item_sep, s
|
||
|
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 "csv" writer).
|
||
|
|
||
|
nokey, nk
|
||
|
If set to 1 specify not to print the key of each field. Its default
|
||
|
value is 0 (1 for the "csv" writer).
|
||
|
|
||
|
escape, e
|
||
|
Set the escape mode to use, default to "c" ("csv" for the "csv"
|
||
|
writer).
|
||
|
|
||
|
It can assume one of the following values:
|
||
|
|
||
|
c Perform C-like escaping. Strings containing a newline (\n),
|
||
|
carriage return (\r), a tab (\t), a form feed (\f), the
|
||
|
escaping character (\) or the item separator character SEP are
|
||
|
escaped using C-like fashioned escaping, so that a newline is
|
||
|
converted to the sequence \n, a carriage return to \r, \ to \\
|
||
|
and the separator SEP is converted to \SEP.
|
||
|
|
||
|
csv Perform CSV-like escaping, as described in RFC4180. Strings
|
||
|
containing a newline (\n), a carriage return (\r), a double
|
||
|
quote ("), or SEP are enclosed in double-quotes.
|
||
|
|
||
|
none
|
||
|
Perform no escaping.
|
||
|
|
||
|
print_section, p
|
||
|
Print the section name at the beginning of each line if the value
|
||
|
is 1, disable it with value set to 0. Default value is 1.
|
||
|
|
||
|
flat
|
||
|
Flat format.
|
||
|
|
||
|
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 sep_char
|
||
|
option).
|
||
|
|
||
|
The description of the accepted options follows.
|
||
|
|
||
|
sep_char, s
|
||
|
Separator character used to separate the chapter, the section name,
|
||
|
IDs and potential tags in the printed field key.
|
||
|
|
||
|
Default value is ..
|
||
|
|
||
|
hierarchical, h
|
||
|
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.
|
||
|
|
||
|
Default value is 1.
|
||
|
|
||
|
ini
|
||
|
INI format output.
|
||
|
|
||
|
Print output in an INI based format.
|
||
|
|
||
|
The following conventions are adopted:
|
||
|
|
||
|
o all key and values are UTF-8
|
||
|
|
||
|
o . is the subgroup separator
|
||
|
|
||
|
o newline, \t, \f, \b and the following characters are escaped
|
||
|
|
||
|
o \ is the escape character
|
||
|
|
||
|
o # is the comment indicator
|
||
|
|
||
|
o = is the key/value separator
|
||
|
|
||
|
o : is not used but usually parsed as key/value separator
|
||
|
|
||
|
This writer accepts options as a list of key=value pairs, separated by
|
||
|
:.
|
||
|
|
||
|
The description of the accepted options follows.
|
||
|
|
||
|
hierarchical, h
|
||
|
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.
|
||
|
|
||
|
Default value is 1.
|
||
|
|
||
|
json
|
||
|
JSON based format.
|
||
|
|
||
|
Each section is printed using JSON notation.
|
||
|
|
||
|
The description of the accepted options follows.
|
||
|
|
||
|
compact, c
|
||
|
If set to 1 enable compact output, that is each section will be
|
||
|
printed on a single line. Default value is 0.
|
||
|
|
||
|
For more information about JSON, see <http://www.json.org/>.
|
||
|
|
||
|
xml
|
||
|
XML based format.
|
||
|
|
||
|
The XML output is described in the XML schema description file
|
||
|
ffprobe.xsd installed in the FFmpeg datadir.
|
||
|
|
||
|
An updated version of the schema can be retrieved at the url
|
||
|
<http://www.ffmpeg.org/schema/ffprobe.xsd>, which redirects to the
|
||
|
latest schema committed into the FFmpeg development source code tree.
|
||
|
|
||
|
Note that the output issued will be compliant to the ffprobe.xsd schema
|
||
|
only when no special global output options (unit, prefix,
|
||
|
byte_binary_prefix, sexagesimal etc.) are specified.
|
||
|
|
||
|
The description of the accepted options follows.
|
||
|
|
||
|
fully_qualified, q
|
||
|
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.
|
||
|
|
||
|
xsd_strict, x
|
||
|
If set to 1 perform more checks for ensuring that the output is XSD
|
||
|
compliant. Default value is 0. This option automatically sets
|
||
|
fully_qualified to 1.
|
||
|
|
||
|
For more information about the XML format, see
|
||
|
<https://www.w3.org/XML/>.
|
||
|
|
||
|
TIMECODE
|
||
|
ffprobe supports Timecode extraction:
|
||
|
|
||
|
o MPEG1/2 timecode is extracted from the GOP, and is available in the
|
||
|
video stream details (-show_streams, see timecode).
|
||
|
|
||
|
o MOV timecode is extracted from tmcd track, so is available in the
|
||
|
tmcd stream metadata (-show_streams, see TAG:timecode).
|
||
|
|
||
|
o DV, GXF and AVI timecodes are available in format metadata
|
||
|
(-show_format, see TAG:timecode).
|
||
|
|
||
|
SEE ALSO
|
||
|
ffprobe-all(1), ffmpeg(1), ffplay(1), ffmpeg-utils(1),
|
||
|
ffmpeg-scaler(1), ffmpeg-resampler(1), ffmpeg-codecs(1),
|
||
|
ffmpeg-bitstream-filters(1), ffmpeg-formats(1), ffmpeg-devices(1),
|
||
|
ffmpeg-protocols(1), ffmpeg-filters(1)
|
||
|
|
||
|
AUTHORS
|
||
|
The FFmpeg developers.
|
||
|
|
||
|
For details about the authorship, see the Git history of the project
|
||
|
(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command git log in
|
||
|
the FFmpeg source directory, or browsing the online repository at
|
||
|
<https://git.ffmpeg.org/ffmpeg>.
|
||
|
|
||
|
Maintainers for the specific components are listed in the file
|
||
|
MAINTAINERS in the source code tree.
|
||
|
|
||
|
FFPROBE(1)
|