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# 1. Synopsis

    ffplay [options] ‘input_file’

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# 2. Description

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.

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# 3. Options

All the numerical options, if not specified otherwise, accept in input a string representing a number, which may contain one of the International System number postfixes, for example 'K', 'M', 'G'. If 'i' is Appended after the postfix, powers of 2 are used instead of powers of 10. The 'B' postfix multiplies the value for 8, and can be Appended after another postfix or used alone. This allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.

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## 3.1 Generic options

These options are shared amongst the ff* tools.

‘`-L`’

  Show license.

‘`-h, -?, -help, --help`’

  Show help.

‘`-version`’

  Show version.

‘`-formats`’

  Show available formats.

  The fields preceding the format names have the following meanings:

  ‘`D`’

    Decoding available

  ‘`E`’

    Encoding available

‘`-codecs`’

  Show available codecs.

  The fields preceding the codec names have the following meanings:

  ‘`D`’

    Decoding available

  ‘`E`’

    Encoding available

  ‘`V/A/S`’

    Video/audio/subtitle codec

  ‘`S`’

    Codec supports slices

  ‘`D`’

    Codec supports direct rendering

  ‘`T`’

    Codec can handle input truncated at random locations instead of only at frame boundaries

‘`-bsfs`’

  Show available bitstream filters.

‘`-protocols`’

  Show available protocols.

‘`-filters`’

  Show available libavfilter filters.

‘`-pix_fmts`’

  Show available pixel formats.

‘`-loglevel loglevel`’

  Set the logging level used by the library. loglevel is a number or a string containing one of the following values:

  ‘`quiet`’
  ‘`panic`’
  ‘`fatal`’
  ‘`error`’
  ‘`warning`’
  ‘`info`’
  ‘`verbose`’
  ‘`debug`’

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## 3.2 Main options

‘`-x width`’

  Force displayed width.

‘`-y height`’

  Force displayed height.

‘`-s size`’

  Set frame size (WxH or abbreviation), needed for videos which don't contain a header with the frame size like raw YUV.

‘`-an`’

  Disable audio.

‘`-vn`’

  Disable video.

‘`-ss pos`’

  Seek to a given position in seconds.

‘`-t duration`’

  play <duration> seconds of audio/video

‘`-bytes`’

  Seek by bytes.

‘`-nodisp`’

  Disable graphical display.

‘`-f fmt`’

  Force format.

‘`-window_title title`’

  Set window title (default is the input filename).

‘`-loop number`’

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

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## 3.3 Advanced options

‘`-pix_fmt format`’

  Set pixel format.

‘`-stats`’

  Show the stream duration, the codec parameters, the current position in the stream and the audio/video synchronisation drift.

‘`-debug`’

  Print specific debug info.

‘`-bug`’

  Work around bugs.

‘`-vismv`’

  Visualize motion vectors.

‘`-fast`’

  Non-spec-compliant optimizations.

‘`-genpts`’

  Generate pts.

‘`-rtp_tcp`’

  Force RTP/TCP protocol usage instead of RTP/UDP. It is only meaningful if you are streaming with the RTSP protocol.

‘`-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.

‘`-threads count`’

  Set the thread count.

‘`-ast audio_stream_number`’

  Select the desired audio stream number, counting from 0. The number refers to the list of all the input audio streams. If it is greater than the number of audio streams minus one, then the last one is selected, if it is negative the audio playback is disabled.

‘`-vst video_stream_number`’

  Select the desired video stream number, counting from 0. The number refers to the list of all the input video streams. If it is greater than the number of video streams minus one, then the last one is selected, if it is negative the video playback is disabled.

‘`-sst subtitle_stream_number`’

  Select the desired subtitle stream number, counting from 0. The number refers to the list of all the input subtitle streams. If it is greater than the number of subtitle streams minus one, then the last one is selected, if it is negative the subtitle rendering is disabled.

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## 3.4 While playing

<q, ESC>

  Quit.

<f>

  Toggle full screen.

<p, SPC>

  Pause.

<a>

  Cycle audio channel.

<v>

  Cycle video channel.

<t>

  Cycle subtitle channel.

<w>

  Show audio waves.

<left/right>

  Seek backward/forward 10 seconds.

<down/up>

  Seek backward/forward 1 minute.

<mouse click>

  Seek to percentage in file corresponding to fraction of width.

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# About This Document

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