yading@10: @chapter Decoders
yading@10: @c man begin DECODERS
yading@10: 
yading@10: Decoders are configured elements in FFmpeg which allow the decoding of
yading@10: multimedia streams.
yading@10: 
yading@10: When you configure your FFmpeg build, all the supported native decoders
yading@10: are enabled by default. Decoders requiring an external library must be enabled
yading@10: manually via the corresponding @code{--enable-lib} option. You can list all
yading@10: available decoders using the configure option @code{--list-decoders}.
yading@10: 
yading@10: You can disable all the decoders with the configure option
yading@10: @code{--disable-decoders} and selectively enable / disable single decoders
yading@10: with the options @code{--enable-decoder=@var{DECODER}} /
yading@10: @code{--disable-decoder=@var{DECODER}}.
yading@10: 
yading@10: The option @code{-codecs} of the ff* tools will display the list of
yading@10: enabled decoders.
yading@10: 
yading@10: @c man end DECODERS
yading@10: 
yading@10: @chapter Video Decoders
yading@10: @c man begin VIDEO DECODERS
yading@10: 
yading@10: A description of some of the currently available video decoders
yading@10: follows.
yading@10: 
yading@10: @section rawvideo
yading@10: 
yading@10: Raw video decoder.
yading@10: 
yading@10: This decoder decodes rawvideo streams.
yading@10: 
yading@10: @subsection Options
yading@10: 
yading@10: @table @option
yading@10: @item top @var{top_field_first}
yading@10: Specify the assumed field type of the input video.
yading@10: @table @option
yading@10: @item -1
yading@10: the video is assumed to be progressive (default)
yading@10: @item 0
yading@10: bottom-field-first is assumed
yading@10: @item 1
yading@10: top-field-first is assumed
yading@10: @end table
yading@10: 
yading@10: @end table
yading@10: 
yading@10: @c man end VIDEO DECODERS
yading@10: 
yading@10: @chapter Audio Decoders
yading@10: @c man begin AUDIO DECODERS
yading@10: 
yading@10: @section ffwavesynth
yading@10: 
yading@10: Internal wave synthetizer.
yading@10: 
yading@10: This decoder generates wave patterns according to predefined sequences. Its
yading@10: use is purely internal and the format of the data it accepts is not publicly
yading@10: documented.
yading@10: 
yading@10: @c man end AUDIO DECODERS
yading@10: 
yading@10: @chapter Subtitles Decoders
yading@10: @c man begin SUBTILES DECODERS
yading@10: 
yading@10: @section dvdsub
yading@10: 
yading@10: This codec decodes the bitmap subtitles used in DVDs; the same subtitles can
yading@10: also be found in VobSub file pairs and in some Matroska files.
yading@10: 
yading@10: @subsection Options
yading@10: 
yading@10: @table @option
yading@10: @item palette
yading@10: Specify the global palette used by the bitmaps. When stored in VobSub, the
yading@10: palette is normally specified in the index file; in Matroska, the palette is
yading@10: stored in the codec extra-data in the same format as in VobSub. In DVDs, the
yading@10: palette is stored in the IFO file, and therefore not available when reading
yading@10: from dumped VOB files.
yading@10: 
yading@10: The format for this option is a string containing 16 24-bits hexadecimal
yading@10: numbers (without 0x prefix) separated by comas, for example @code{0d00ee,
yading@10: ee450d, 101010, eaeaea, 0ce60b, ec14ed, ebff0b, 0d617a, 7b7b7b, d1d1d1,
yading@10: 7b2a0e, 0d950c, 0f007b, cf0dec, cfa80c, 7c127b}.
yading@10: @end table
yading@10: 
yading@10: @c man end SUBTILES DECODERS