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f48f03a400
The option is useful for simplifying parsing. Also use the new option in fate, in order to fix the regression introduced by the previous commit.
361 lines
9.2 KiB
Plaintext
361 lines
9.2 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
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@settitle ffprobe Documentation
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@titlepage
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@center @titlefont{ffprobe Documentation}
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@end titlepage
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@top
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@contents
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@chapter Synopsis
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The generic syntax is:
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@example
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@c man begin SYNOPSIS
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ffprobe [options] [@file{input_file}]
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@c man end
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@end example
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@chapter Description
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@c man begin 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
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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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If a filename is specified in input, ffprobe will try to open and
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probe the file content. If the file cannot be opened or recognized as
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a multimedia file, a positive exit code is returned.
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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
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sophisticated 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 @option{print_format} option.
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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" or "STREAM" section.
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@c man end
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@chapter Options
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@c man begin OPTIONS
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@include avtools-common-opts.texi
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@section Main options
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@table @option
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@item -f @var{format}
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Force format to use.
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@item -unit
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Show the unit of the displayed values.
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@item -prefix
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Use SI prefixes for the displayed values.
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Unless the "-byte_binary_prefix" option is used all the prefixes
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are decimal.
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@item -byte_binary_prefix
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Force the use of binary prefixes for byte values.
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@item -sexagesimal
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Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
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@item -pretty
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Prettify the format of the displayed values, it corresponds to the
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options "-unit -prefix -byte_binary_prefix -sexagesimal".
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@item -print_format @var{writer_name}[=@var{writer_options}]
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Set the output printing format.
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@var{writer_name} specifies the name of the writer, and
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@var{writer_options} specifies the options to be passed to the writer.
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For example for printing the output in JSON format, specify:
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@example
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-print_format json
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@end example
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For more details on the available output printing formats, see the
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Writers section below.
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@item -show_error
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Show information about the error found when trying to probe the input.
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The error information is printed within a section with name "ERROR".
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@item -show_format
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Show information about the container format of the input multimedia
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stream.
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All the container format information is printed within a section with
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name "FORMAT".
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@item -show_format_entry @var{name}
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Like @option{-show_format}, but only prints the specified entry of the
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container format information, rather than all. This option may be given more
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than once, then all specified entries will be shown.
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@item -show_packets
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Show information about each packet contained in the input multimedia
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stream.
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The information for each single packet is printed within a dedicated
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section with name "PACKET".
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@item -show_frames
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Show information about each frame contained in the input multimedia
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stream.
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The information for each single frame is printed within a dedicated
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section with name "FRAME".
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@item -show_streams
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Show information about each media stream contained in the input
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multimedia stream.
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Each media stream information is printed within a dedicated section
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with name "STREAM".
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@item -count_frames
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Count the number of frames per stream and report it in the
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corresponding stream section.
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@item -count_packets
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Count the number of packets per stream and report it in the
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corresponding stream section.
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@item -show_private_data, -private
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Show private data, that is data depending on the format of the
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particular shown element.
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This option is enabled by default, but you may need to disable it
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for specific uses, for example when creating XSD-compliant XML output.
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@item -show_program_version
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Show information related to program version.
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Version information is printed within a section with name
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"PROGRAM_VERSION".
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@item -show_library_versions
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Show information related to library versions.
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Version information for each library is printed within a section with
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name "LIBRARY_VERSION".
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@item -show_versions
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Show information related to program and library versions. This is the
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equivalent of setting both @option{-show_program_version} and
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@option{-show_library_versions} options.
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@item -i @var{input_file}
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Read @var{input_file}.
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@end table
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@c man end
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@chapter Writers
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@c man begin WRITERS
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A writer defines the output format adopted by @command{ffprobe}, and will be
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used for printing all the parts of the output.
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A writer may accept one or more arguments, which specify the options to
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adopt.
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A description of the currently available writers follows.
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@section default
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Default format.
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Print each section in the form:
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@example
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[SECTION]
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key1=val1
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...
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keyN=valN
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[/SECTION]
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@end example
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Metadata tags are printed as a line in the corresponding FORMAT or
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STREAM section, and are prefixed by the string "TAG:".
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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A description of the accepted options follows.
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@table @option
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@item noprint_wrappers, nw
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If set to 1 specify not to print the section header and footer.
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Default value is 0.
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@end table
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@section compact
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Compact format.
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Each section is printed on a single line.
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If no option is specifid, the output has the form:
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@example
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section|key1=val1| ... |keyN=valN
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@end example
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Metadata tags are printed in the corresponding "format" or "stream"
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section. A metadata tag key, if printed, is prefixed by the string
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"tag:".
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item item_sep, s
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Specify the character to use for separating fields in the output line.
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It must be a single printable character, it is "|" by default.
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@item nokey, nk
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If set to 1 specify not to print the key of each field. Its default
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value is 0.
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@item escape, e
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Set the escape mode to use, default to "c".
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It can assume one of the following values:
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@table @option
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@item c
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Perform C-like escaping. Strings containing a newline ('\n') or
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carriage return ('\r'), the escaping character ('\') or the item
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separator character @var{SEP} are escaped using C-like fashioned
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escaping, so that a newline is converted to the sequence "\n", a
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carriage return to "\r", '\' to "\\" and the separator @var{SEP} is
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converted to "\@var{SEP}".
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@item csv
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Perform CSV-like escaping, as described in RFC4180. Strings
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containing a newline ('\n'), a carriage return ('\r'), a double quote
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('"'), or @var{SEP} are enclosed in double-quotes.
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@item none
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Perform no escaping.
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@end table
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@end table
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@section csv
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CSV format.
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This writer is equivalent to
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@code{compact=item_sep=,:nokey=1:escape=csv}.
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@section json
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JSON based format.
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Each section is printed using JSON notation.
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item compact, c
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If set to 1 enable compact output, that is each section will be
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printed on a single line. Default value is 0.
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@end table
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For more information about JSON, see @url{http://www.json.org/}.
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@section xml
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XML based format.
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The XML output is described in the XML schema description file
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@file{ffprobe.xsd} installed in the FFmpeg datadir.
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Note that the output issued will be compliant to the
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@file{ffprobe.xsd} schema only when no special global output options
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(@option{unit}, @option{prefix}, @option{byte_binary_prefix},
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@option{sexagesimal} etc.) are specified.
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item fully_qualified, q
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If set to 1 specify if the output should be fully qualified. Default
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value is 0.
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This is required for generating an XML file which can be validated
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through an XSD file.
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@item xsd_compliant, x
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If set to 1 perform more checks for ensuring that the output is XSD
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compliant. Default value is 0.
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This option automatically sets @option{fully_qualified} to 1.
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@end table
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For more information about the XML format, see
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@url{http://www.w3.org/XML/}.
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@chapter Timecode
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@command{ffprobe} supports Timecode extraction:
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@itemize
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@item MPEG1/2 timecode is extracted from the GOP, and is available in the video
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stream details (@option{-show_streams}, see @var{timecode}).
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@item MOV timecode is extracted from tmcd track, so is available in the tmcd
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stream metadata (@option{-show_streams}, see @var{TAG:timecode}).
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@item DV and GXF timecodes are available in format metadata
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(@option{-show_format}, see @var{TAG:timecode}).
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@end itemize
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@c man end WRITERS
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@include decoders.texi
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@include demuxers.texi
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@include protocols.texi
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@include indevs.texi
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@ignore
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@setfilename ffprobe
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@settitle ffprobe media prober
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@c man begin SEEALSO
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ffmpeg(1), ffplay(1), ffserver(1) and the FFmpeg HTML documentation
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@c man end
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@c man begin AUTHORS
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The FFmpeg developers
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@c man end
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@end ignore
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@bye
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