doc/ffprobe.1

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.\" ========================================================================
.\"
.IX Title "FFPROBE 1"
.TH FFPROBE 1 " " " " " "
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
ffprobe \- ffprobe media prober
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
ffprobe [\fIoptions\fR] \fIinput_url\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
ffprobe gathers information from multimedia streams and prints it in
human\- and machine-readable fashion.
.PP
For example it can be used to check the format of the container used
by a multimedia stream and the format and type of each media stream
contained in it.
.PP
If a url is specified in input, ffprobe will try to open and
probe the url content. If the url cannot be opened or recognized as
a multimedia file, a positive exit code is returned.
.PP
If no output is specified as output with \fBo\fR ffprobe will write
to stdout.
.PP
ffprobe may be employed both as a standalone application or in
combination with a textual filter, which may perform more
sophisticated processing, e.g. statistical processing or plotting.
.PP
Options are used to list some of the formats supported by ffprobe or
for specifying which information to display, and for setting how
ffprobe will show it.
.PP
ffprobe output is designed to be easily parsable by a textual filter,
and consists of one or more sections of a form defined by the selected
writer, which is specified by the \fBprint_format\fR option.
.PP
Sections may contain other nested sections, and are identified by a
name (which may be shared by other sections), and an unique
name. See the output of \fBsections\fR.
.PP
Metadata tags stored in the container or in the streams are recognized
and printed in the corresponding \*(L"\s-1FORMAT\*(R", \*(L"STREAM\*(R"\s0 or \*(L"\s-1PROGRAM_STREAM\*(R"\s0
section.
.SH "OPTIONS"
.IX Header "OPTIONS"
All the numerical options, if not specified otherwise, accept a string
representing a number as input, which may be followed by one of the \s-1SI\s0
unit prefixes, for example: 'K', 'M', or 'G'.
.PP
If 'i' is appended to the \s-1SI\s0 unit prefix, the complete prefix will be
interpreted as a unit prefix for binary multiples, which are based on
powers of 1024 instead of powers of 1000. Appending 'B' to the \s-1SI\s0 unit
prefix multiplies the value by 8. This allows using, for example:
\&'\s-1KB\s0', 'MiB', 'G' and 'B' as number suffixes.
.PP
Options which do not take arguments are boolean options, and set the
corresponding value to true. They can be set to false by prefixing
the option name with \*(L"no\*(R". For example using \*(L"\-nofoo\*(R"
will set the boolean option with name \*(L"foo\*(R" to false.
.SS "Stream specifiers"
.IX Subsection "Stream specifiers"
Some options are applied per-stream, e.g. bitrate or codec. Stream specifiers
are used to precisely specify which stream(s) a given option belongs to.
.PP
A stream specifier is a string generally appended to the option name and
separated from it by a colon. E.g. \f(CW\*(C`\-codec:a:1 ac3\*(C'\fR contains the
\&\f(CW\*(C`a:1\*(C'\fR stream specifier, which matches the second audio stream. Therefore, it
would select the ac3 codec for the second audio stream.
.PP
A stream specifier can match several streams, so that the option is applied to all
of them. E.g. the stream specifier in \f(CW\*(C`\-b:a 128k\*(C'\fR matches all audio
streams.
.PP
An empty stream specifier matches all streams. For example, \f(CW\*(C`\-codec copy\*(C'\fR
or \f(CW\*(C`\-codec: copy\*(C'\fR would copy all the streams without reencoding.
.PP
Possible forms of stream specifiers are:
.IP "\fIstream_index\fR" 4
.IX Item "stream_index"
Matches the stream with this index. E.g. \f(CW\*(C`\-threads:1 4\*(C'\fR would set the
thread count for the second stream to 4. If \fIstream_index\fR is used as an
additional stream specifier (see below), then it selects stream number
\&\fIstream_index\fR from the matching streams. Stream numbering is based on the
order of the streams as detected by libavformat except when a program \s-1ID\s0 is
also specified. In this case it is based on the ordering of the streams in the
program.
.IP "\fIstream_type\fR\fB[:\fR\fIadditional_stream_specifier\fR\fB]\fR" 4
.IX Item "stream_type[:additional_stream_specifier]"
\&\fIstream_type\fR is one of following: 'v' or 'V' for video, 'a' for audio, 's'
for subtitle, 'd' for data, and 't' for attachments. 'v' matches all video
streams, 'V' only matches video streams which are not attached pictures, video
thumbnails or cover arts. If \fIadditional_stream_specifier\fR is used, then
it matches streams which both have this type and match the
\&\fIadditional_stream_specifier\fR. Otherwise, it matches all streams of the
specified type.
.IP "\fBp:\fR\fIprogram_id\fR\fB[:\fR\fIadditional_stream_specifier\fR\fB]\fR" 4
.IX Item "p:program_id[:additional_stream_specifier]"
Matches streams which are in the program with the id \fIprogram_id\fR. If
\&\fIadditional_stream_specifier\fR is used, then it matches streams which both
are part of the program and match the \fIadditional_stream_specifier\fR.
.IP "\fB#\fR\fIstream_id\fR \fBor i:\fR\fIstream_id\fR" 4
.IX Item "#stream_id or i:stream_id"
Match the stream by stream id (e.g. \s-1PID\s0 in MPEG-TS container).
.IP "\fBm:\fR\fIkey\fR\fB[:\fR\fIvalue\fR\fB]\fR" 4
.IX Item "m:key[:value]"
Matches streams with the metadata tag \fIkey\fR having the specified value. If
\&\fIvalue\fR is not given, matches streams that contain the given tag with any
value.
.IP "\fBu\fR" 4
.IX Item "u"
Matches streams with usable configuration, the codec must be defined and the
essential information such as video dimension or audio sample rate must be present.
.Sp
Note that in \fBffmpeg\fR, matching by metadata will only work properly for
input files.
.SS "Generic options"
.IX Subsection "Generic options"
These options are shared amongst the ff* tools.
.IP "\fB\-L\fR" 4
.IX Item "-L"
Show license.
.IP "\fB\-h, \-?, \-help, \-\-help [\fR\fIarg\fR\fB]\fR" 4
.IX Item "-h, -?, -help, --help [arg]"
Show help. An optional parameter may be specified to print help about a specific
item. If no argument is specified, only basic (non advanced) tool
options are shown.
.Sp
Possible values of \fIarg\fR are:
.RS 4
.IP "\fBlong\fR" 4
.IX Item "long"
Print advanced tool options in addition to the basic tool options.
.IP "\fBfull\fR" 4
.IX Item "full"
Print complete list of options, including shared and private options
for encoders, decoders, demuxers, muxers, filters, etc.
.IP "\fBdecoder=\fR\fIdecoder_name\fR" 4
.IX Item "decoder=decoder_name"
Print detailed information about the decoder named \fIdecoder_name\fR. Use the
\&\fB\-decoders\fR option to get a list of all decoders.
.IP "\fBencoder=\fR\fIencoder_name\fR" 4
.IX Item "encoder=encoder_name"
Print detailed information about the encoder named \fIencoder_name\fR. Use the
\&\fB\-encoders\fR option to get a list of all encoders.
.IP "\fBdemuxer=\fR\fIdemuxer_name\fR" 4
.IX Item "demuxer=demuxer_name"
Print detailed information about the demuxer named \fIdemuxer_name\fR. Use the
\&\fB\-formats\fR option to get a list of all demuxers and muxers.
.IP "\fBmuxer=\fR\fImuxer_name\fR" 4
.IX Item "muxer=muxer_name"
Print detailed information about the muxer named \fImuxer_name\fR. Use the
\&\fB\-formats\fR option to get a list of all muxers and demuxers.
.IP "\fBfilter=\fR\fIfilter_name\fR" 4
.IX Item "filter=filter_name"
Print detailed information about the filter named \fIfilter_name\fR. Use the
\&\fB\-filters\fR option to get a list of all filters.
.IP "\fBbsf=\fR\fIbitstream_filter_name\fR" 4
.IX Item "bsf=bitstream_filter_name"
Print detailed information about the bitstream filter named \fIbitstream_filter_name\fR.
Use the \fB\-bsfs\fR option to get a list of all bitstream filters.
.IP "\fBprotocol=\fR\fIprotocol_name\fR" 4
.IX Item "protocol=protocol_name"
Print detailed information about the protocol named \fIprotocol_name\fR.
Use the \fB\-protocols\fR option to get a list of all protocols.
.RE
.RS 4
.RE
.IP "\fB\-version\fR" 4
.IX Item "-version"
Show version.
.IP "\fB\-buildconf\fR" 4
.IX Item "-buildconf"
Show the build configuration, one option per line.
.IP "\fB\-formats\fR" 4
.IX Item "-formats"
Show available formats (including devices).
.IP "\fB\-demuxers\fR" 4
.IX Item "-demuxers"
Show available demuxers.
.IP "\fB\-muxers\fR" 4
.IX Item "-muxers"
Show available muxers.
.IP "\fB\-devices\fR" 4
.IX Item "-devices"
Show available devices.
.IP "\fB\-codecs\fR" 4
.IX Item "-codecs"
Show all codecs known to libavcodec.
.Sp
Note that the term 'codec' is used throughout this documentation as a shortcut
for what is more correctly called a media bitstream format.
.IP "\fB\-decoders\fR" 4
.IX Item "-decoders"
Show available decoders.
.IP "\fB\-encoders\fR" 4
.IX Item "-encoders"
Show all available encoders.
.IP "\fB\-bsfs\fR" 4
.IX Item "-bsfs"
Show available bitstream filters.
.IP "\fB\-protocols\fR" 4
.IX Item "-protocols"
Show available protocols.
.IP "\fB\-filters\fR" 4
.IX Item "-filters"
Show available libavfilter filters.
.IP "\fB\-pix_fmts\fR" 4
.IX Item "-pix_fmts"
Show available pixel formats.
.IP "\fB\-sample_fmts\fR" 4
.IX Item "-sample_fmts"
Show available sample formats.
.IP "\fB\-layouts\fR" 4
.IX Item "-layouts"
Show channel names and standard channel layouts.
.IP "\fB\-dispositions\fR" 4
.IX Item "-dispositions"
Show stream dispositions.
.IP "\fB\-colors\fR" 4
.IX Item "-colors"
Show recognized color names.
.IP "\fB\-sources\fR \fIdevice\fR\fB[,\fR\fIopt1\fR\fB=\fR\fIval1\fR\fB[,\fR\fIopt2\fR\fB=\fR\fIval2\fR\fB]...]\fR" 4
.IX Item "-sources device[,opt1=val1[,opt2=val2]...]"
Show autodetected sources of the input device.
Some devices may provide system-dependent source names that cannot be autodetected.
The returned list cannot be assumed to be always complete.
.Sp
.Vb 1
\&        ffmpeg \-sources pulse,server=192.168.0.4
.Ve
.IP "\fB\-sinks\fR \fIdevice\fR\fB[,\fR\fIopt1\fR\fB=\fR\fIval1\fR\fB[,\fR\fIopt2\fR\fB=\fR\fIval2\fR\fB]...]\fR" 4
.IX Item "-sinks device[,opt1=val1[,opt2=val2]...]"
Show autodetected sinks of the output device.
Some devices may provide system-dependent sink names that cannot be autodetected.
The returned list cannot be assumed to be always complete.
.Sp
.Vb 1
\&        ffmpeg \-sinks pulse,server=192.168.0.4
.Ve
.IP "\fB\-loglevel [\fR\fIflags\fR\fB+]\fR\fIloglevel\fR \fB| \-v [\fR\fIflags\fR\fB+]\fR\fIloglevel\fR" 4
.IX Item "-loglevel [flags+]loglevel | -v [flags+]loglevel"
Set logging level and flags used by the library.
.Sp
The optional \fIflags\fR prefix can consist of the following values:
.RS 4
.IP "\fBrepeat\fR" 4
.IX Item "repeat"
Indicates that repeated log output should not be compressed to the first line
and the \*(L"Last message repeated n times\*(R" line will be omitted.
.IP "\fBlevel\fR" 4
.IX Item "level"
Indicates that log output should add a \f(CW\*(C`[level]\*(C'\fR prefix to each message
line. This can be used as an alternative to log coloring, e.g. when dumping the
log to file.
.RE
.RS 4
.Sp
Flags can also be used alone by adding a '+'/'\-' prefix to set/reset a single
flag without affecting other \fIflags\fR or changing \fIloglevel\fR. When
setting both \fIflags\fR and \fIloglevel\fR, a '+' separator is expected
between the last \fIflags\fR value and before \fIloglevel\fR.
.Sp
\&\fIloglevel\fR is a string or a number containing one of the following values:
.IP "\fBquiet, \-8\fR" 4
.IX Item "quiet, -8"
Show nothing at all; be silent.
.IP "\fBpanic, 0\fR" 4
.IX Item "panic, 0"
Only show fatal errors which could lead the process to crash, such as
an assertion failure. This is not currently used for anything.
.IP "\fBfatal, 8\fR" 4
.IX Item "fatal, 8"
Only show fatal errors. These are errors after which the process absolutely
cannot continue.
.IP "\fBerror, 16\fR" 4
.IX Item "error, 16"
Show all errors, including ones which can be recovered from.
.IP "\fBwarning, 24\fR" 4
.IX Item "warning, 24"
Show all warnings and errors. Any message related to possibly
incorrect or unexpected events will be shown.
.IP "\fBinfo, 32\fR" 4
.IX Item "info, 32"
Show informative messages during processing. This is in addition to
warnings and errors. This is the default value.
.IP "\fBverbose, 40\fR" 4
.IX Item "verbose, 40"
Same as \f(CW\*(C`info\*(C'\fR, except more verbose.
.IP "\fBdebug, 48\fR" 4
.IX Item "debug, 48"
Show everything, including debugging information.
.IP "\fBtrace, 56\fR" 4
.IX Item "trace, 56"
.RE
.RS 4
.Sp
For example to enable repeated log output, add the \f(CW\*(C`level\*(C'\fR prefix, and set
\&\fIloglevel\fR to \f(CW\*(C`verbose\*(C'\fR:
.Sp
.Vb 1
\&        ffmpeg \-loglevel repeat+level+verbose \-i input output
.Ve
.Sp
Another example that enables repeated log output without affecting current
state of \f(CW\*(C`level\*(C'\fR prefix flag or \fIloglevel\fR:
.Sp
.Vb 1
\&        ffmpeg [...] \-loglevel +repeat
.Ve
.Sp
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
\&\fB\s-1AV_LOG_FORCE_NOCOLOR\s0\fR, or can be forced setting
the environment variable \fB\s-1AV_LOG_FORCE_COLOR\s0\fR.
.RE
.IP "\fB\-report\fR" 4
.IX Item "-report"
Dump full command line and log output to a file named
\&\f(CW\*(C`\f(CIprogram\f(CW\-\f(CIYYYYMMDD\f(CW\-\f(CIHHMMSS\f(CW.log\*(C'\fR in the current
directory.
This file can be useful for bug reports.
It also implies \f(CW\*(C`\-loglevel debug\*(C'\fR.
.Sp
Setting the environment variable \fB\s-1FFREPORT\s0\fR 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).
.Sp
The following options are recognized:
.RS 4
.IP "\fBfile\fR" 4
.IX Item "file"
set the file name to use for the report; \f(CW%p\fR is expanded to the name
of the program, \f(CW%t\fR is expanded to a timestamp, \f(CW\*(C`%%\*(C'\fR is expanded
to a plain \f(CW\*(C`%\*(C'\fR
.IP "\fBlevel\fR" 4
.IX Item "level"
set the log verbosity level using a numerical value (see \f(CW\*(C`\-loglevel\*(C'\fR).
.RE
.RS 4
.Sp
For example, to output a report to a file named \fIffreport.log\fR
using a log level of \f(CW32\fR (alias for log level \f(CW\*(C`info\*(C'\fR):
.Sp
.Vb 1
\&        FFREPORT=file=ffreport.log:level=32 ffmpeg \-i input output
.Ve
.Sp
Errors in parsing the environment variable are not fatal, and will not
appear in the report.
.RE
.IP "\fB\-hide_banner\fR" 4
.IX Item "-hide_banner"
Suppress printing banner.
.Sp
All FFmpeg tools will normally show a copyright notice, build options
and library versions. This option can be used to suppress printing
this information.
.IP "\fB\-cpuflags flags (\fR\fIglobal\fR\fB)\fR" 4
.IX Item "-cpuflags flags (global)"
Allows setting and clearing cpu flags. This option is intended
for testing. Do not use it unless you know what you're doing.
.Sp
.Vb 3
\&        ffmpeg \-cpuflags \-sse+mmx ...
\&        ffmpeg \-cpuflags mmx ...
\&        ffmpeg \-cpuflags 0 ...
.Ve
.Sp
Possible flags for this option are:
.RS 4
.IP "\fBx86\fR" 4
.IX Item "x86"
.RS 4
.PD 0
.IP "\fBmmx\fR" 4
.IX Item "mmx"
.IP "\fBmmxext\fR" 4
.IX Item "mmxext"
.IP "\fBsse\fR" 4
.IX Item "sse"
.IP "\fBsse2\fR" 4
.IX Item "sse2"
.IP "\fBsse2slow\fR" 4
.IX Item "sse2slow"
.IP "\fBsse3\fR" 4
.IX Item "sse3"
.IP "\fBsse3slow\fR" 4
.IX Item "sse3slow"
.IP "\fBssse3\fR" 4
.IX Item "ssse3"
.IP "\fBatom\fR" 4
.IX Item "atom"
.IP "\fBsse4.1\fR" 4
.IX Item "sse4.1"
.IP "\fBsse4.2\fR" 4
.IX Item "sse4.2"
.IP "\fBavx\fR" 4
.IX Item "avx"
.IP "\fBavx2\fR" 4
.IX Item "avx2"
.IP "\fBxop\fR" 4
.IX Item "xop"
.IP "\fBfma3\fR" 4
.IX Item "fma3"
.IP "\fBfma4\fR" 4
.IX Item "fma4"
.IP "\fB3dnow\fR" 4
.IX Item "3dnow"
.IP "\fB3dnowext\fR" 4
.IX Item "3dnowext"
.IP "\fBbmi1\fR" 4
.IX Item "bmi1"
.IP "\fBbmi2\fR" 4
.IX Item "bmi2"
.IP "\fBcmov\fR" 4
.IX Item "cmov"
.RE
.RS 4
.RE
.IP "\fB\s-1ARM\s0\fR" 4
.IX Item "ARM"
.RS 4
.IP "\fBarmv5te\fR" 4
.IX Item "armv5te"
.IP "\fBarmv6\fR" 4
.IX Item "armv6"
.IP "\fBarmv6t2\fR" 4
.IX Item "armv6t2"
.IP "\fBvfp\fR" 4
.IX Item "vfp"
.IP "\fBvfpv3\fR" 4
.IX Item "vfpv3"
.IP "\fBneon\fR" 4
.IX Item "neon"
.IP "\fBsetend\fR" 4
.IX Item "setend"
.RE
.RS 4
.RE
.IP "\fBAArch64\fR" 4
.IX Item "AArch64"
.RS 4
.IP "\fBarmv8\fR" 4
.IX Item "armv8"
.IP "\fBvfp\fR" 4
.IX Item "vfp"
.IP "\fBneon\fR" 4
.IX Item "neon"
.RE
.RS 4
.RE
.IP "\fBPowerPC\fR" 4
.IX Item "PowerPC"
.RS 4
.IP "\fBaltivec\fR" 4
.IX Item "altivec"
.RE
.RS 4
.RE
.IP "\fBSpecific Processors\fR" 4
.IX Item "Specific Processors"
.RS 4
.IP "\fBpentium2\fR" 4
.IX Item "pentium2"
.IP "\fBpentium3\fR" 4
.IX Item "pentium3"
.IP "\fBpentium4\fR" 4
.IX Item "pentium4"
.IP "\fBk6\fR" 4
.IX Item "k6"
.IP "\fBk62\fR" 4
.IX Item "k62"
.IP "\fBathlon\fR" 4
.IX Item "athlon"
.IP "\fBathlonxp\fR" 4
.IX Item "athlonxp"
.IP "\fBk8\fR" 4
.IX Item "k8"
.RE
.RS 4
.RE
.RE
.RS 4
.RE
.IP "\fB\-cpucount\fR \fIcount\fR \fB(\fR\fIglobal\fR\fB)\fR" 4
.IX Item "-cpucount count (global)"
.PD
Override detection of \s-1CPU\s0 count. This option is intended
for testing. Do not use it unless you know what you're doing.
.Sp
.Vb 1
\&        ffmpeg \-cpucount 2
.Ve
.IP "\fB\-max_alloc\fR \fIbytes\fR" 4
.IX Item "-max_alloc bytes"
Set the maximum size limit for allocating a block on the heap by ffmpeg's
family of malloc functions. Exercise \fBextreme caution\fR when using
this option. Don't use if you do not understand the full consequence of doing so.
Default is \s-1INT_MAX.\s0
.SS "AVOptions"
.IX Subsection "AVOptions"
These options are provided directly by the libavformat, libavdevice and
libavcodec libraries. To see the list of available AVOptions, use the
\&\fB\-help\fR option. They are separated into two categories:
.IP "\fBgeneric\fR" 4
.IX Item "generic"
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.
.IP "\fBprivate\fR" 4
.IX Item "private"
These options are specific to the given container, device or codec. Private
options are listed under their corresponding containers/devices/codecs.
.PP
For example to write an ID3v2.3 header instead of a default ID3v2.4 to
an \s-1MP3\s0 file, use the \fBid3v2_version\fR private option of the \s-1MP3\s0
muxer:
.PP
.Vb 1
\&        ffmpeg \-i input.flac \-id3v2_version 3 out.mp3
.Ve
.PP
All codec AVOptions are per-stream, and thus a stream specifier
should be attached to them:
.PP
.Vb 1
\&        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
.Ve
.PP
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.
.PP
Note: the \fB\-nooption\fR syntax cannot be used for boolean
AVOptions, use \fB\-option 0\fR/\fB\-option 1\fR.
.PP
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.
.SS "Main options"
.IX Subsection "Main options"
.IP "\fB\-f\fR \fIformat\fR" 4
.IX Item "-f format"
Force format to use.
.IP "\fB\-unit\fR" 4
.IX Item "-unit"
Show the unit of the displayed values.
.IP "\fB\-prefix\fR" 4
.IX Item "-prefix"
Use \s-1SI\s0 prefixes for the displayed values.
Unless the \*(L"\-byte_binary_prefix\*(R" option is used all the prefixes
are decimal.
.IP "\fB\-byte_binary_prefix\fR" 4
.IX Item "-byte_binary_prefix"
Force the use of binary prefixes for byte values.
.IP "\fB\-sexagesimal\fR" 4
.IX Item "-sexagesimal"
Use sexagesimal format \s-1HH:MM:SS.MICROSECONDS\s0 for time values.
.IP "\fB\-pretty\fR" 4
.IX Item "-pretty"
Prettify the format of the displayed values, it corresponds to the
options \*(L"\-unit \-prefix \-byte_binary_prefix \-sexagesimal\*(R".
.IP "\fB\-of, \-print_format\fR \fIwriter_name\fR\fB[=\fR\fIwriter_options\fR\fB]\fR" 4
.IX Item "-of, -print_format writer_name[=writer_options]"
Set the output printing format.
.Sp
\&\fIwriter_name\fR specifies the name of the writer, and
\&\fIwriter_options\fR specifies the options to be passed to the writer.
.Sp
For example for printing the output in \s-1JSON\s0 format, specify:
.Sp
.Vb 1
\&        \-print_format json
.Ve
.Sp
For more details on the available output printing formats, see the
Writers section below.
.IP "\fB\-sections\fR" 4
.IX Item "-sections"
Print sections structure and section information, and exit. The output
is not meant to be parsed by a machine.
.IP "\fB\-select_streams\fR \fIstream_specifier\fR" 4
.IX Item "-select_streams stream_specifier"
Select only the streams specified by \fIstream_specifier\fR. This
option affects only the options related to streams
(e.g. \f(CW\*(C`show_streams\*(C'\fR, \f(CW\*(C`show_packets\*(C'\fR, etc.).
.Sp
For example to show only audio streams, you can use the command:
.Sp
.Vb 1
\&        ffprobe \-show_streams \-select_streams a INPUT
.Ve
.Sp
To show only video packets belonging to the video stream with index 1:
.Sp
.Vb 1
\&        ffprobe \-show_packets \-select_streams v:1 INPUT
.Ve
.IP "\fB\-show_data\fR" 4
.IX Item "-show_data"
Show payload data, as a hexadecimal and \s-1ASCII\s0 dump. Coupled with
\&\fB\-show_packets\fR, it will dump the packets' data. Coupled with
\&\fB\-show_streams\fR, it will dump the codec extradata.
.Sp
The dump is printed as the \*(L"data\*(R" field. It may contain newlines.
.IP "\fB\-show_data_hash\fR \fIalgorithm\fR" 4
.IX Item "-show_data_hash algorithm"
Show a hash of payload data, for packets with \fB\-show_packets\fR and for
codec extradata with \fB\-show_streams\fR.
.IP "\fB\-show_error\fR" 4
.IX Item "-show_error"
Show information about the error found when trying to probe the input.
.Sp
The error information is printed within a section with name \*(L"\s-1ERROR\*(R".\s0
.IP "\fB\-show_format\fR" 4
.IX Item "-show_format"
Show information about the container format of the input multimedia
stream.
.Sp
All the container format information is printed within a section with
name \*(L"\s-1FORMAT\*(R".\s0
.IP "\fB\-show_format_entry\fR \fIname\fR" 4
.IX Item "-show_format_entry name"
Like \fB\-show_format\fR, 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.
.Sp
This option is deprecated, use \f(CW\*(C`show_entries\*(C'\fR instead.
.IP "\fB\-show_entries\fR \fIsection_entries\fR" 4
.IX Item "-show_entries section_entries"
Set list of entries to show.
.Sp
Entries are specified according to the following
syntax. \fIsection_entries\fR contains a list of section entries
separated by \f(CW\*(C`:\*(C'\fR. 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 \f(CW\*(C`,\*(C'\fR.
.Sp
If section name is specified but is followed by no \f(CW\*(C`=\*(C'\fR, 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 \f(CW\*(C`=\*(C'\fR is specified but
the list of local entries is empty, then no entries will be shown for
that section.
.Sp
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.
.Sp
The formal syntax is given by:
.Sp
.Vb 3
\&        <LOCAL_SECTION_ENTRIES> ::= <SECTION_ENTRY_NAME>[,<LOCAL_SECTION_ENTRIES>]
\&        <SECTION_ENTRY>         ::= <SECTION_NAME>[=[<LOCAL_SECTION_ENTRIES>]]
\&        <SECTION_ENTRIES>       ::= <SECTION_ENTRY>[:<SECTION_ENTRIES>]
.Ve
.Sp
For example, to show only the index and type of each stream, and the \s-1PTS\s0
time, duration time, and stream index of the packets, you can specify
the argument:
.Sp
.Vb 1
\&        packet=pts_time,duration_time,stream_index : stream=index,codec_type
.Ve
.Sp
To show all the entries in the section \*(L"format\*(R", but only the codec
type in the section \*(L"stream\*(R", specify the argument:
.Sp
.Vb 1
\&        format : stream=codec_type
.Ve
.Sp
To show all the tags in the stream and format sections:
.Sp
.Vb 1
\&        stream_tags : format_tags
.Ve
.Sp
To show only the \f(CW\*(C`title\*(C'\fR tag (if available) in the stream
sections:
.Sp
.Vb 1
\&        stream_tags=title
.Ve
.IP "\fB\-show_packets\fR" 4
.IX Item "-show_packets"
Show information about each packet contained in the input multimedia
stream.
.Sp
The information for each single packet is printed within a dedicated
section with name \*(L"\s-1PACKET\*(R".\s0
.IP "\fB\-show_frames\fR" 4
.IX Item "-show_frames"
Show information about each frame and subtitle contained in the input
multimedia stream.
.Sp
The information for each single frame is printed within a dedicated
section with name \*(L"\s-1FRAME\*(R"\s0 or \*(L"\s-1SUBTITLE\*(R".\s0
.IP "\fB\-show_log\fR \fIloglevel\fR" 4
.IX Item "-show_log loglevel"
Show logging information from the decoder about each frame according to
the value set in \fIloglevel\fR, (see \f(CW\*(C`\-loglevel\*(C'\fR). This option requires \f(CW\*(C`\-show_frames\*(C'\fR.
.Sp
The information for each log message is printed within a dedicated
section with name \*(L"\s-1LOG\*(R".\s0
.IP "\fB\-show_streams\fR" 4
.IX Item "-show_streams"
Show information about each media stream contained in the input
multimedia stream.
.Sp
Each media stream information is printed within a dedicated section
with name \*(L"\s-1STREAM\*(R".\s0
.IP "\fB\-show_programs\fR" 4
.IX Item "-show_programs"
Show information about programs and their streams contained in the input
multimedia stream.
.Sp
Each media stream information is printed within a dedicated section
with name \*(L"\s-1PROGRAM_STREAM\*(R".\s0
.IP "\fB\-show_chapters\fR" 4
.IX Item "-show_chapters"
Show information about chapters stored in the format.
.Sp
Each chapter is printed within a dedicated section with name \*(L"\s-1CHAPTER\*(R".\s0
.IP "\fB\-count_frames\fR" 4
.IX Item "-count_frames"
Count the number of frames per stream and report it in the
corresponding stream section.
.IP "\fB\-count_packets\fR" 4
.IX Item "-count_packets"
Count the number of packets per stream and report it in the
corresponding stream section.
.IP "\fB\-read_intervals\fR \fIread_intervals\fR" 4
.IX Item "-read_intervals read_intervals"
Read only the specified intervals. \fIread_intervals\fR must be a
sequence of interval specifications separated by \*(L",\*(R".
\&\fBffprobe\fR will seek to the interval starting point, and will
continue reading from that.
.Sp
Each interval is specified by two optional parts, separated by \*(L"%\*(R".
.Sp
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 \*(L"+\*(R" character. If this first
part is not specified, no seeking will be performed when reading this
interval.
.Sp
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 \*(L"+\*(R" character. If the offset
specification starts with \*(L"#\*(R", 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.
.Sp
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.
.Sp
The formal syntax is given by:
.Sp
.Vb 2
\&        <INTERVAL>  ::= [<START>|+<START_OFFSET>][%[<END>|+<END_OFFSET>]]
\&        <INTERVALS> ::= <INTERVAL>[,<INTERVALS>]
.Ve
.Sp
A few examples follow.
.RS 4
.IP "\(bu" 4
Seek to time 10, read packets until 20 seconds after the found seek
point, then seek to position \f(CW\*(C`01:30\*(C'\fR (1 minute and thirty
seconds) and read packets until position \f(CW\*(C`01:45\*(C'\fR.
.Sp
.Vb 1
\&        10%+20,01:30%01:45
.Ve
.IP "\(bu" 4
Read only 42 packets after seeking to position \f(CW\*(C`01:23\*(C'\fR:
.Sp
.Vb 1
\&        01:23%+#42
.Ve
.IP "\(bu" 4
Read only the first 20 seconds from the start:
.Sp
.Vb 1
\&        %+20
.Ve
.IP "\(bu" 4
Read from the start until position \f(CW\*(C`02:30\*(C'\fR:
.Sp
.Vb 1
\&        %02:30
.Ve
.RE
.RS 4
.RE
.IP "\fB\-show_private_data, \-private\fR" 4
.IX Item "-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 \s-1XML\s0 output.
.IP "\fB\-show_program_version\fR" 4
.IX Item "-show_program_version"
Show information related to program version.
.Sp
Version information is printed within a section with name
\&\*(L"\s-1PROGRAM_VERSION\*(R".\s0
.IP "\fB\-show_library_versions\fR" 4
.IX Item "-show_library_versions"
Show information related to library versions.
.Sp
Version information for each library is printed within a section with
name \*(L"\s-1LIBRARY_VERSION\*(R".\s0
.IP "\fB\-show_versions\fR" 4
.IX Item "-show_versions"
Show information related to program and library versions. This is the
equivalent of setting both \fB\-show_program_version\fR and
\&\fB\-show_library_versions\fR options.
.IP "\fB\-show_pixel_formats\fR" 4
.IX Item "-show_pixel_formats"
Show information about all pixel formats supported by FFmpeg.
.Sp
Pixel format information for each format is printed within a section
with name \*(L"\s-1PIXEL_FORMAT\*(R".\s0
.IP "\fB\-show_optional_fields\fR \fIvalue\fR" 4
.IX Item "-show_optional_fields value"
Some writers viz. \s-1JSON\s0 and \s-1XML,\s0 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 \f(CW\*(C`always\*(C'\fR/\f(CW1\fR, \f(CW\*(C`never\*(C'\fR/\f(CW0\fR and \f(CW\*(C`auto\*(C'\fR/\f(CW\*(C`\-1\*(C'\fR.
Default is \fIauto\fR.
.IP "\fB\-bitexact\fR" 4
.IX Item "-bitexact"
Force bitexact output, useful to produce output which is not dependent
on the specific build.
.IP "\fB\-i\fR \fIinput_url\fR" 4
.IX Item "-i input_url"
Read \fIinput_url\fR.
.IP "\fB\-o\fR \fIoutput_url\fR" 4
.IX Item "-o output_url"
Write output to \fIoutput_url\fR. If not specified, the output is sent
to stdout.
.SH "WRITERS"
.IX Header "WRITERS"
A writer defines the output format adopted by \fBffprobe\fR, and will be
used for printing all the parts of the output.
.PP
A writer may accept one or more arguments, which specify the options
to adopt. The options are specified as a list of \fIkey\fR=\fIvalue\fR
pairs, separated by \*(L":\*(R".
.PP
All writers support the following options:
.IP "\fBstring_validation, sv\fR" 4
.IX Item "string_validation, sv"
Set string validation mode.
.Sp
The following values are accepted.
.RS 4
.IP "\fBfail\fR" 4
.IX Item "fail"
The writer will fail immediately in case an invalid string (\s-1UTF\-8\s0)
sequence or code point is found in the input. This is especially
useful to validate input metadata.
.IP "\fBignore\fR" 4
.IX Item "ignore"
Any validation error will be ignored. This will result in possibly
broken output, especially with the json or xml writer.
.IP "\fBreplace\fR" 4
.IX Item "replace"
The writer will substitute invalid \s-1UTF\-8\s0 sequences or code points with
the string specified with the \fBstring_validation_replacement\fR.
.RE
.RS 4
.Sp
Default value is \fBreplace\fR.
.RE
.IP "\fBstring_validation_replacement, svr\fR" 4
.IX Item "string_validation_replacement, svr"
Set replacement string to use in case \fBstring_validation\fR is
set to \fBreplace\fR.
.Sp
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.
.PP
A description of the currently available writers follows.
.SS "default"
.IX Subsection "default"
Default format.
.PP
Print each section in the form:
.PP
.Vb 5
\&        [SECTION]
\&        key1=val1
\&        ...
\&        keyN=valN
\&        [/SECTION]
.Ve
.PP
Metadata tags are printed as a line in the corresponding \s-1FORMAT, STREAM\s0 or
\&\s-1PROGRAM_STREAM\s0 section, and are prefixed by the string \*(L"\s-1TAG:\*(R".\s0
.PP
A description of the accepted options follows.
.IP "\fBnokey, nk\fR" 4
.IX Item "nokey, nk"
If set to 1 specify not to print the key of each field. Default value
is 0.
.IP "\fBnoprint_wrappers, nw\fR" 4
.IX Item "noprint_wrappers, nw"
If set to 1 specify not to print the section header and footer.
Default value is 0.
.SS "compact, csv"
.IX Subsection "compact, csv"
Compact and \s-1CSV\s0 format.
.PP
The \f(CW\*(C`csv\*(C'\fR writer is equivalent to \f(CW\*(C`compact\*(C'\fR, but supports
different defaults.
.PP
Each section is printed on a single line.
If no option is specified, the output has the form:
.PP
.Vb 1
\&        section|key1=val1| ... |keyN=valN
.Ve
.PP
Metadata tags are printed in the corresponding \*(L"format\*(R" or \*(L"stream\*(R"
section. A metadata tag key, if printed, is prefixed by the string
\&\*(L"tag:\*(R".
.PP
The description of the accepted options follows.
.IP "\fBitem_sep, s\fR" 4
.IX Item "item_sep, s"
Specify the character to use for separating fields in the output line.
It must be a single printable character, it is \*(L"|\*(R" by default (\*(L",\*(R" for
the \f(CW\*(C`csv\*(C'\fR writer).
.IP "\fBnokey, nk\fR" 4
.IX Item "nokey, nk"
If set to 1 specify not to print the key of each field. Its default
value is 0 (1 for the \f(CW\*(C`csv\*(C'\fR writer).
.IP "\fBescape, e\fR" 4
.IX Item "escape, e"
Set the escape mode to use, default to \*(L"c\*(R" (\*(L"csv\*(R" for the \f(CW\*(C`csv\*(C'\fR
writer).
.Sp
It can assume one of the following values:
.RS 4
.IP "\fBc\fR" 4
.IX Item "c"
Perform C\-like escaping. Strings containing a newline (\fB\en\fR), carriage
return (\fB\er\fR), a tab (\fB\et\fR), a form feed (\fB\ef\fR), the escaping
character (\fB\e\fR) or the item separator character \fI\s-1SEP\s0\fR are escaped
using C\-like fashioned escaping, so that a newline is converted to the
sequence \fB\en\fR, a carriage return to \fB\er\fR, \fB\e\fR to \fB\e\e\fR and
the separator \fI\s-1SEP\s0\fR is converted to \fB\e\fR\fI\s-1SEP\s0\fR.
.IP "\fBcsv\fR" 4
.IX Item "csv"
Perform CSV-like escaping, as described in \s-1RFC4180.\s0  Strings
containing a newline (\fB\en\fR), a carriage return (\fB\er\fR), a double quote
(\fB"\fR), or \fI\s-1SEP\s0\fR are enclosed in double-quotes.
.IP "\fBnone\fR" 4
.IX Item "none"
Perform no escaping.
.RE
.RS 4
.RE
.IP "\fBprint_section, p\fR" 4
.IX Item "print_section, p"
Print the section name at the beginning of each line if the value is
\&\f(CW1\fR, disable it with value set to \f(CW0\fR. Default value is
\&\f(CW1\fR.
.SS "flat"
.IX Subsection "flat"
Flat format.
.PP
A free-form output where each line contains an explicit key=value, such as
\&\*(L"streams.stream.3.tags.foo=bar\*(R". 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 \fIsep_char\fR option).
.PP
The description of the accepted options follows.
.IP "\fBsep_char, s\fR" 4
.IX Item "sep_char, s"
Separator character used to separate the chapter, the section name, IDs and
potential tags in the printed field key.
.Sp
Default value is \fB.\fR.
.IP "\fBhierarchical, h\fR" 4
.IX Item "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.
.Sp
Default value is 1.
.SS "ini"
.IX Subsection "ini"
\&\s-1INI\s0 format output.
.PP
Print output in an \s-1INI\s0 based format.
.PP
The following conventions are adopted:
.IP "\(bu" 4
all key and values are \s-1UTF\-8\s0
.IP "\(bu" 4
\&\fB.\fR is the subgroup separator
.IP "\(bu" 4
newline, \fB\et\fR, \fB\ef\fR, \fB\eb\fR and the following characters are
escaped
.IP "\(bu" 4
\&\fB\e\fR is the escape character
.IP "\(bu" 4
\&\fB#\fR is the comment indicator
.IP "\(bu" 4
\&\fB=\fR is the key/value separator
.IP "\(bu" 4
\&\fB:\fR is not used but usually parsed as key/value separator
.PP
This writer accepts options as a list of \fIkey\fR=\fIvalue\fR pairs,
separated by \fB:\fR.
.PP
The description of the accepted options follows.
.IP "\fBhierarchical, h\fR" 4
.IX Item "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.
.Sp
Default value is 1.
.SS "json"
.IX Subsection "json"
\&\s-1JSON\s0 based format.
.PP
Each section is printed using \s-1JSON\s0 notation.
.PP
The description of the accepted options follows.
.IP "\fBcompact, c\fR" 4
.IX Item "compact, c"
If set to 1 enable compact output, that is each section will be
printed on a single line. Default value is 0.
.PP
For more information about \s-1JSON,\s0 see <\fBhttp://www.json.org/\fR>.
.SS "xml"
.IX Subsection "xml"
\&\s-1XML\s0 based format.
.PP
The \s-1XML\s0 output is described in the \s-1XML\s0 schema description file
\&\fIffprobe.xsd\fR installed in the FFmpeg datadir.
.PP
An updated version of the schema can be retrieved at the url
<\fBhttp://www.ffmpeg.org/schema/ffprobe.xsd\fR>, which redirects to the
latest schema committed into the FFmpeg development source code tree.
.PP
Note that the output issued will be compliant to the
\&\fIffprobe.xsd\fR schema only when no special global output options
(\fBunit\fR, \fBprefix\fR, \fBbyte_binary_prefix\fR,
\&\fBsexagesimal\fR etc.) are specified.
.PP
The description of the accepted options follows.
.IP "\fBfully_qualified, q\fR" 4
.IX Item "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 \s-1XML\s0 file which can be validated
through an \s-1XSD\s0 file.
.IP "\fBxsd_strict, x\fR" 4
.IX Item "xsd_strict, x"
If set to 1 perform more checks for ensuring that the output is \s-1XSD\s0
compliant. Default value is 0.
This option automatically sets \fBfully_qualified\fR to 1.
.PP
For more information about the \s-1XML\s0 format, see
<\fBhttps://www.w3.org/XML/\fR>.
.SH "TIMECODE"
.IX Header "TIMECODE"
\&\fBffprobe\fR supports Timecode extraction:
.IP "\(bu" 4
\&\s-1MPEG1/2\s0 timecode is extracted from the \s-1GOP,\s0 and is available in the video
stream details (\fB\-show_streams\fR, see \fItimecode\fR).
.IP "\(bu" 4
\&\s-1MOV\s0 timecode is extracted from tmcd track, so is available in the tmcd
stream metadata (\fB\-show_streams\fR, see \fITAG:timecode\fR).
.IP "\(bu" 4
\&\s-1DV, GXF\s0 and \s-1AVI\s0 timecodes are available in format metadata
(\fB\-show_format\fR, see \fITAG:timecode\fR).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBffprobe\-all\fR\|(1),
\&\fBffmpeg\fR\|(1), \fBffplay\fR\|(1),
\&\fBffmpeg\-utils\fR\|(1), \fBffmpeg\-scaler\fR\|(1), \fBffmpeg\-resampler\fR\|(1),
\&\fBffmpeg\-codecs\fR\|(1), \fBffmpeg\-bitstream\-filters\fR\|(1), \fBffmpeg\-formats\fR\|(1),
\&\fBffmpeg\-devices\fR\|(1), \fBffmpeg\-protocols\fR\|(1), \fBffmpeg\-filters\fR\|(1)
.SH "AUTHORS"
.IX Header "AUTHORS"
The FFmpeg developers.
.PP
For details about the authorship, see the Git history of the project
(https://git.ffmpeg.org/ffmpeg), e.g. by typing the command
\&\fBgit log\fR in the FFmpeg source directory, or browsing the
online repository at <\fBhttps://git.ffmpeg.org/ffmpeg\fR>.
.PP
Maintainers for the specific components are listed in the file
\&\fI\s-1MAINTAINERS\s0\fR in the source code tree.