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74 lines
2.1 KiB
Plaintext
74 lines
2.1 KiB
Plaintext
@chapter Output Devices
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@c man begin OUTPUT DEVICES
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Output devices are configured elements in FFmpeg which allow to write
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multimedia data to an output device attached to your system.
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When you configure your FFmpeg build, all the supported output devices
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are enabled by default. You can list all available ones using the
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configure option "--list-outdevs".
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You can disable all the output devices using the configure option
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"--disable-outdevs", and selectively enable an output device using the
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option "--enable-outdev=@var{OUTDEV}", or you can disable a particular
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input device using the option "--disable-outdev=@var{OUTDEV}".
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The option "-formats" of the ff* tools will display the list of
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enabled output devices (amongst the muxers).
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A description of the currently available output devices follows.
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@section alsa
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ALSA (Advanced Linux Sound Architecture) output device.
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@section oss
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OSS (Open Sound System) output device.
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@section sdl
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SDL (Simple DirectMedia Layer) output device.
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This output devices allows to show a video stream in an SDL
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window. Only one SDL window is allowed per application, so you can
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have only one instance of this output device in an application.
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To enable this output device you need libsdl installed on your system
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when configuring your build.
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For more information about SDL, check:
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@url{http://www.libsdl.org/}
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@subsection Options
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@table @option
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@item window_title
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Set the SDL window title, if not specified default to the filename
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specified for the output device.
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@item icon_title
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Set the name of the iconified SDL window, if not specified it is set
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to the same value of @var{window_title}.
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@item window_size
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Set the SDL window size, can be a string of the form
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@var{width}x@var{height} or a video size abbreviation.
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If not specified it defaults to the size of the input video.
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@end table
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@subsection Examples
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The following command shows the @command{ffmpeg} output is an
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SDL window, forcing its size to the qcif format:
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@example
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ffmpeg -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "SDL output"
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@end example
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@section sndio
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sndio audio output device.
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@c man end OUTPUT DEVICES
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