ffplay

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

Stream specifiers

stream_index

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[:additional_stream_specifier]

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.

p:program_id[:additional_stream_specifier]

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).

m:key[:value]

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

-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:

-version

Show version.

-buildconf

Show the build configuration, one option per line.

-formats

Show available formats (including devices).

-demuxers

Show available demuxers.

-muxers

Show available muxers.

-devices

Show available devices.

-codecs

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.

-decoders

Show available decoders.

-encoders

Show all available encoders.

-bsfs

Show available bitstream filters.

-protocols

Show available protocols.

-filters

Show available libavfilter filters.

-pix_fmts

Show available pixel formats.

-sample_fmts

Show available sample formats.

-layouts

Show channel names and standard channel layouts.

-dispositions

Show stream dispositions.

-colors

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=192.168.0.4
    

-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=192.168.0.4
    

-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:

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

        ffmpeg [...] -loglevel +repeat

-report

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:

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

-hide_banner

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:

-cpucount count (global)

Override detection of CPU count. This option is intended for testing. Do not use it unless you know what you're doing.

        ffmpeg -cpucount 2
    

-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.

AVOptions

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.

private

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

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

        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

Main options

-x width

Force displayed width.

-y height

Force displayed height.

-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.

-bytes

Seek by bytes.

-seek_interval

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

-nodisp

Disable graphical display.

-noborder

Borderless window.

-alwaysontop

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

-volume

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:

-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

-stats

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".

-fast

Non-spec-compliant optimizations.

-genpts

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.

-autoexit

Exit when video is done playing.

-exitonkeydown

Exit if any key is pressed.

-exitonmousedown

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.

-autorotate

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

-framedrop

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.

-infbuf

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

Quit.

f

Toggle full screen.

p, SPC

Pause.

m

Toggle mute.

9, 0

/, *

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.

left/right

Seek backward/forward 10 seconds.

down/up

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.

SEE ALSO

AUTHORS