64 lines
1.6 KiB
Plaintext
64 lines
1.6 KiB
Plaintext
@chapter Decoders
|
|
@c man begin DECODERS
|
|
|
|
Decoders are configured elements in FFmpeg which allow the decoding of
|
|
multimedia streams.
|
|
|
|
When you configure your FFmpeg build, all the supported native decoders
|
|
are enabled by default. Decoders requiring an external library must be enabled
|
|
manually via the corresponding @code{--enable-lib} option. You can list all
|
|
available decoders using the configure option @code{--list-decoders}.
|
|
|
|
You can disable all the decoders with the configure option
|
|
@code{--disable-decoders} and selectively enable / disable single decoders
|
|
with the options @code{--enable-decoder=@var{DECODER}} /
|
|
@code{--disable-decoder=@var{DECODER}}.
|
|
|
|
The option @code{-codecs} of the ff* tools will display the list of
|
|
enabled decoders.
|
|
|
|
@c man end DECODERS
|
|
|
|
@chapter Video Decoders
|
|
@c man begin VIDEO DECODERS
|
|
|
|
A description of some of the currently available video decoders
|
|
follows.
|
|
|
|
@section rawvideo
|
|
|
|
Raw video decoder.
|
|
|
|
This decoder decodes rawvideo streams.
|
|
|
|
@subsection Options
|
|
|
|
@table @option
|
|
@item top @var{top_field_first}
|
|
Specify the assumed field type of the input video.
|
|
@table @option
|
|
@item -1
|
|
the video is assumed to be progressive (default)
|
|
@item 0
|
|
bottom-field-first is assumed
|
|
@item 1
|
|
top-field-first is assumed
|
|
@end table
|
|
|
|
@end table
|
|
|
|
@c man end VIDEO DECODERS
|
|
|
|
@chapter Audio Decoders
|
|
@c man begin AUDIO DECODERS
|
|
|
|
@section ffwavesynth
|
|
|
|
Internal wave synthetizer.
|
|
|
|
This decoder generates wave patterns according to predefined sequences. Its
|
|
use is purely internal and the format of the data it accepts is not publicly
|
|
documented.
|
|
|
|
@c man end AUDIO DECODERS
|