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ffplay(1)                                                            ffplay(1)


       ffplay - FFplay media player


       ffplay [options] [input_url]


       FFplay is a very simple and portable media player using the FFmpeg
       libraries and the SDL library. It is mostly used as a testbed for the
       various FFmpeg APIs.


       All the numerical options, if not specified otherwise, accept a string
       representing a number as input, which may be followed by one of the SI
       unit prefixes, for example: 'K', 'M', or 'G'.

       If 'i' is appended to the SI 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 SI unit
       prefix multiplies the value by 8. This allows using, for example: 'KB',
       'MiB', 'G' and 'B' as number suffixes.

       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 "no". For example using "-nofoo" will set the boolean
       option with name "foo" to false.

   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.

       A stream specifier is a string generally appended to the option name
       and separated from it by a colon. E.g. "-codec:a:1 ac3" contains the
       "a:1" stream specifier, which matches the second audio stream.
       Therefore, it would select the ac3 codec for the second audio stream.

       A stream specifier can match several streams, so that the option is
       applied to all of them. E.g. the stream specifier in "-b:a 128k"
       matches all audio streams.

       An empty stream specifier matches all streams. For example, "-codec
       copy" or "-codec: copy" would copy all the streams without reencoding.

       Possible forms of stream specifiers are:

           Matches the stream with this index. E.g. "-threads:1 4" would set
           the thread count for the second stream to 4. If stream_index is
           used as an additional stream specifier (see below), then it selects
           stream number stream_index from the matching streams. Stream
           numbering is based on the order of the streams as detected by
           libavformat except when a program ID is also specified. In this
           case it is based on the ordering of the streams in the program.

           stream_type 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
           additional_stream_specifier is used, then it matches streams which
           both have this type and match the additional_stream_specifier.
           Otherwise, it matches all streams of the specified type.

           Matches streams which are in the program with the id program_id. If
           additional_stream_specifier is used, then it matches streams which
           both are part of the program and match the

       #stream_id or i:stream_id
           Match the stream by stream id (e.g. PID in MPEG-TS container).

           Matches streams with the metadata tag key having the specified
           value. If value is not given, matches streams that contain the
           given tag with any value.

       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.

           Note that in ffmpeg, matching by metadata will only work properly
           for input files.

   Generic options
       These options are shared amongst the ff* tools.

       -L  Show license.

       -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.

           Possible values of arg are:

               Print advanced tool options in addition to the basic tool

               Print complete list of options, including shared and private
               options for encoders, decoders, demuxers, muxers, filters, etc.

               Print detailed information about the decoder named
               decoder_name. Use the -decoders option to get a list of all

               Print detailed information about the encoder named
               encoder_name. Use the -encoders option to get a list of all

               Print detailed information about the demuxer named
               demuxer_name. Use the -formats option to get a list of all
               demuxers and muxers.

               Print detailed information about the muxer named muxer_name.
               Use the -formats option to get a list of all muxers and

               Print detailed information about the filter named filter_name.
               Use the -filters option to get a list of all filters.

               Print detailed information about the bitstream filter named
               bitstream_filter_name.  Use the -bsfs option to get a list of
               all bitstream filters.

               Print detailed information about the protocol named
               protocol_name.  Use the -protocols option to get a list of all

           Show version.

           Show the build configuration, one option per line.

           Show available formats (including devices).

           Show available demuxers.

           Show available muxers.

           Show available devices.

           Show all codecs known to libavcodec.

           Note that the term 'codec' is used throughout this documentation as
           a shortcut for what is more correctly called a media bitstream

           Show available decoders.

           Show all available encoders.

           Show available bitstream filters.

           Show available protocols.

           Show available libavfilter filters.

           Show available pixel formats.

           Show available sample formats.

           Show channel names and standard channel layouts.

           Show recognized color names.

       -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.

                   ffmpeg -sources pulse,server=

       -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.

                   ffmpeg -sinks pulse,server=

       -loglevel [flags+]loglevel | -v [flags+]loglevel
           Set logging level and flags used by the library.

           The optional flags prefix can consist of the following values:

               Indicates that repeated log output should not be compressed to
               the first line and the "Last message repeated n times" line
               will be omitted.

               Indicates that log output should add a "[level]" prefix to each
               message line. This can be used as an alternative to log
               coloring, e.g. when dumping the log to file.

           Flags can also be used alone by adding a '+'/'-' prefix to
           set/reset a single flag without affecting other flags or changing
           loglevel. When setting both flags and loglevel, a '+' separator is
           expected between the last flags value and before loglevel.

           loglevel is a string or a number containing one of the following

           quiet, -8
               Show nothing at all; be silent.

           panic, 0
               Only show fatal errors which could lead the process to crash,
               such as an assertion failure. This is not currently used for

           fatal, 8
               Only show fatal errors. These are errors after which the
               process absolutely cannot continue.

           error, 16
               Show all errors, including ones which can be recovered from.

           warning, 24
               Show all warnings and errors. Any message related to possibly
               incorrect or unexpected events will be shown.

           info, 32
               Show informative messages during processing. This is in
               addition to warnings and errors. This is the default value.

           verbose, 40
               Same as "info", except more verbose.

           debug, 48
               Show everything, including debugging information.

           trace, 56

           For example to enable repeated log output, add the "level" prefix,
           and set loglevel to "verbose":

                   ffmpeg -loglevel repeat+level+verbose -i input output

           Another example that enables repeated log output without affecting
           current state of "level" prefix flag or loglevel:

                   ffmpeg [...] -loglevel +repeat

           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
           AV_LOG_FORCE_NOCOLOR, or can be forced setting the environment
           variable AV_LOG_FORCE_COLOR.

           Dump full command line and log output to a file named
           "program-YYYYMMDD-HHMMSS.log" in the current directory.  This file
           can be useful for bug reports.  It also implies "-loglevel debug".

           Setting the environment variable FFREPORT 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).

           The following options are recognized:

               set the file name to use for the report; %p is expanded to the
               name of the program, %t is expanded to a timestamp, "%%" is
               expanded to a plain "%"

               set the log verbosity level using a numerical value (see

           For example, to output a report to a file named ffreport.log using
           a log level of 32 (alias for log level "info"):

                   FFREPORT=file=ffreport.log:level=32 ffmpeg -i input output

           Errors in parsing the environment variable are not fatal, and will
           not appear in the report.

           Suppress printing banner.

           All FFmpeg tools will normally show a copyright notice, build
           options and library versions. This option can be used to suppress
           printing this information.

       -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.

                   ffmpeg -cpuflags -sse+mmx ...
                   ffmpeg -cpuflags mmx ...
                   ffmpeg -cpuflags 0 ...

           Possible flags for this option are:

           Specific Processors
       -max_alloc bytes
           Set the maximum size limit for allocating a block on the heap by
           ffmpeg's family of malloc functions. Exercise extreme caution when
           using this option. Don't use if you do not understand the full
           consequence of doing so.  Default is INT_MAX.

       These options are provided directly by the libavformat, libavdevice and
       libavcodec libraries. To see the list of available AVOptions, use the
       -help option. They are separated into two categories:

           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.

           These options are specific to the given container, device or codec.
           Private options are listed under their corresponding

       For example to write an ID3v2.3 header instead of a default ID3v2.4 to
       an MP3 file, use the id3v2_version private option of the MP3 muxer:

               ffmpeg -i input.flac -id3v2_version 3 out.mp3

       All codec AVOptions are per-stream, and thus a stream specifier should
       be attached to them:

               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
       -x width
           Force displayed width.

       -y height
           Force displayed height.

       -s size
           Set frame size (WxH or abbreviation), needed for videos which do
           not contain a header with the frame size like raw YUV.  This option
           has been deprecated in favor of private options, try -video_size.

       -fs Start in fullscreen mode.

       -an Disable audio.

       -vn Disable video.

       -sn Disable subtitles.

       -ss pos
           Seek to pos. Note that in most formats it is not possible to seek
           exactly, so ffplay will seek to the nearest seek point to pos.

           pos must be a time duration specification, see the Time duration
           section in the ffmpeg-utils(1) manual.

       -t duration
           Play duration seconds of audio/video.

           duration must be a time duration specification, see the Time
           duration section in the ffmpeg-utils(1) manual.

           Seek by bytes.

           Set custom interval, in seconds, for seeking using left/right keys.
           Default is 10 seconds.

           Disable graphical display.

           Borderless window.

           Window always on top. Available on: X11 with SDL >= 2.0.5, Windows
           SDL >= 2.0.6.

           Set the startup volume. 0 means silence, 100 means no volume
           reduction or amplification. Negative values are treated as 0,
           values above 100 are treated as 100.

       -f fmt
           Force format.

       -window_title title
           Set window title (default is the input filename).

       -left title
           Set the x position for the left of the window (default is a
           centered window).

       -top title
           Set the y position for the top of the window (default is a centered

       -loop number
           Loops movie playback <number> times. 0 means forever.

       -showmode mode
           Set the show mode to use.  Available values for mode are:

           0, video
               show video

           1, waves
               show audio waves

           2, rdft
               show audio frequency band using RDFT ((Inverse) Real Discrete
               Fourier Transform)

           Default value is "video", if video is not present or cannot be
           played "rdft" is automatically selected.

           You can interactively cycle through the available show modes by
           pressing the key w.

       -vf filtergraph
           Create the filtergraph specified by filtergraph and use it to
           filter the video stream.

           filtergraph is a description of the filtergraph to apply to the
           stream, and must have a single video input and a single video
           output. In the filtergraph, the input is associated to the label
           "in", and the output to the label "out". See the ffmpeg-filters
           manual for more information about the filtergraph syntax.

           You can specify this parameter multiple times and cycle through the
           specified filtergraphs along with the show modes by pressing the
           key w.

       -af filtergraph
           filtergraph is a description of the filtergraph to apply to the
           input audio.  Use the option "-filters" to show all the available
           filters (including sources and sinks).

       -i input_url
           Read input_url.

   Advanced options
       -pix_fmt format
           Set pixel format.  This option has been deprecated in favor of
           private options, try -pixel_format.

           Print several playback statistics, in particular show the stream
           duration, the codec parameters, the current position in the stream
           and the audio/video synchronisation drift. It is shown by default,
           unless the log level is lower than "info". Its display can be
           forced by manually specifying this option. To disable it, you need
           to specify "-nostats".

           Non-spec-compliant optimizations.

           Generate pts.

       -sync type
           Set the master clock to audio ("type=audio"), video ("type=video")
           or external ("type=ext"). Default is audio. The master clock is
           used to control audio-video synchronization. Most media players use
           audio as master clock, but in some cases (streaming or high quality
           broadcast) it is necessary to change that. This option is mainly
           used for debugging purposes.

       -ast audio_stream_specifier
           Select the desired audio stream using the given stream specifier.
           The stream specifiers are described in the Stream specifiers
           chapter. If this option is not specified, the "best" audio stream
           is selected in the program of the already selected video stream.

       -vst video_stream_specifier
           Select the desired video stream using the given stream specifier.
           The stream specifiers are described in the Stream specifiers
           chapter. If this option is not specified, the "best" video stream
           is selected.

       -sst subtitle_stream_specifier
           Select the desired subtitle stream using the given stream
           specifier. The stream specifiers are described in the Stream
           specifiers chapter. If this option is not specified, the "best"
           subtitle stream is selected in the program of the already selected
           video or audio stream.

           Exit when video is done playing.

           Exit if any key is pressed.

           Exit if any mouse button is pressed.

       -codec:media_specifier codec_name
           Force a specific decoder implementation for the stream identified
           by media_specifier, which can assume the values "a" (audio), "v"
           (video), and "s" subtitle.

       -acodec codec_name
           Force a specific audio decoder.

       -vcodec codec_name
           Force a specific video decoder.

       -scodec codec_name
           Force a specific subtitle decoder.

           Automatically rotate the video according to file metadata. Enabled
           by default, use -noautorotate to disable it.

           Drop video frames if video is out of sync. Enabled by default if
           the master clock is not set to video. Use this option to enable
           frame dropping for all master clock sources, use -noframedrop to
           disable it.

           Do not limit the input buffer size, read as much data as possible
           from the input as soon as possible. Enabled by default for realtime
           streams, where data may be dropped if not read in time. Use this
           option to enable infinite buffers for all inputs, use -noinfbuf to
           disable it.

       -filter_threads nb_threads
           Defines how many threads are used to process a filter pipeline.
           Each pipeline will produce a thread pool with this many threads
           available for parallel processing. The default is 0 which means
           that the thread count will be determined by the number of available

   While playing
       q, ESC

       f   Toggle full screen.

       p, SPC

       m   Toggle mute.

       9, 0
           Decrease and increase volume respectively.

       /, *
           Decrease and increase volume respectively.

       a   Cycle audio channel in the current program.

       v   Cycle video channel.

       t   Cycle subtitle channel in the current program.

       c   Cycle program.

       w   Cycle video filters or show modes.

       s   Step to the next frame.

           Pause if the stream is not already paused, step to the next video
           frame, and pause.

           Seek backward/forward 10 seconds.

           Seek backward/forward 1 minute.

       page down/page up
           Seek to the previous/next chapter.  or if there are no chapters
           Seek backward/forward 10 minutes.

       right mouse click
           Seek to percentage in file corresponding to fraction of width.

       left mouse double-click
           Toggle full screen.


       ffplay-all(1), ffmpeg(1), ffprobe(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)


       The FFmpeg developers.

       For details about the authorship, see the Git history of the project
       (git://, e.g. by typing the command git log in
       the FFmpeg source directory, or browsing the online repository at

       Maintainers for the specific components are listed in the file
       MAINTAINERS in the source code tree.


ffmpeg 4.4 - Generated Fri Apr 23 14:52:40 CDT 2021
© 2000-2021
Individual documents may contain additional copyright information.