Provided by: ffmpeg_4.2.2-1ubuntu1_amd64 bug


       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 additional_stream_specifier.

       #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 options.

               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 decoders.

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

               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 demuxers.

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

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

           Show version.

           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 format.

           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 is a string or a number containing one of the following values:

           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 anything.

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

           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

                   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 NO_COLOR, or can be forced setting the
           environment variable AV_LOG_FORCE_COLOR.  The use of the environment variable NO_COLOR
           is deprecated and will be dropped in a future FFmpeg version.

           Dump full command line and console 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 "-loglevel").

           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

           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

       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 containers/devices/codecs.

       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

               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

           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 window).

       -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

           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 on by default, to explicitly 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 CPUs.

   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.