# FFplay Documentation

# Table of Contents

- 1. Introduction
- 2. Invocation
  - 2.1 Syntax
  - 2.2 Main options
  - 2.3 Advanced options
  - 2.4 While playing

FFplay Documentation

# 1. Introduction

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.

# 2. Invocation

## 2.1 Syntax

    ffplay [options] `input_file'

## 2.2 Main options

@option{-h}
  Show help.
@option{-version}
  Show version.
@option{-L}
  Show license.
@option{-formats}
  Show available formats, codecs, protocols, ...
@option{-x width}
  Force displayed width.
@option{-y height}
  Force displayed height.
@option{-s size}
  Set frame size (WxH or abbreviation), needed for videos which don't contain a header with the frame size like raw YUV.
@option{-an}
  Disable audio.
@option{-vn}
  Disable video.
@option{-ss pos}
  Seek to a given position in seconds.
@option{-bytes}
  Seek by bytes.
@option{-nodisp}
  Disable graphical display.
@option{-f fmt}
  Force format.

## 2.3 Advanced options

@option{-pix_fmt format}
  Set pixel format.
@option{-stats}
  Show the stream duration, the codec parameters, the current position in the stream and the audio/video synchronisation drift.
@option{-debug}
  Print specific debug info.
@option{-bug}
  Work around bugs.
@option{-vismv}
  Visualize motion vectors.
@option{-fast}
  Non-spec-compliant optimizations.
@option{-genpts}
  Generate pts.
@option{-rtp_tcp}
  Force RTP/TCP protocol usage instead of RTP/UDP. It is only meaningful if you are streaming with the RTSP protocol.
@option{-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.
@option{-threads count}
  Set the thread count.
@option{-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.
@option{-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.
@option{-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.

## 2.4 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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