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doc/encoders: add libxvid doc

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Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
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Timothy Gu 2013-07-29 19:12:10 -07:00 committed by Stefano Sabatini
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doc/encoders.texi
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@ -1212,6 +1212,119 @@ no-fast-pskip=1:subq=6:8x8dct=0:trellis=0 OUTPUT
Encoding ffpresets for common usages are provided so they can be used with the
general presets system (e.g. passing the @option{pre} option).
@section libxvid
Xvid MPEG-4 Part 2 encoder wrapper.
This encoder requires the presence of the libxvidcore headers and library
during configuration. You need to explicitly configure the build with
@code{--enable-libxvid --enable-gpl}.
The native @code{mpeg4} encoder supports the MPEG-4 Part 2 format, so
users can encode to this format without this library.
@subsection Options
The following options are supported by the libxvid wrapper. Some of
the following options are listed but are not documented, and
correspond to shared codec options. See @ref{codec-options,,the Codec
Options chapter} for their documentation. The other shared options
which are not listed have no effect for the libxvid encoder.
@table @option
@item b
@item g
@item qmin
@item qmax
@item mpeg_quant
@item threads
@item bf
@item b_qfactor
@item b_qoffset
@item flags
Set specific encoding flags. Possible values:
@table @samp
@item mv4
Use four motion vector by macroblock.
@item aic
Enable high quality AC prediction.
@item gray
Only encode grayscale.
@item gmc
Enable the use of global motion compensation (GMC).
@item qpel
Enable quarter-pixel motion compensation.
@item cgop
Enable closed GOP.
@item global_header
Place global headers in extradata instead of every keyframe.
@end table
@item trellis
@item me_method
Set motion estimation method. Possible values in decreasing order of
speed and increasing order of quality:
@table @samp
@item zero
Use no motion estimation (default).
@item phods
@item x1
@item log
Enable advanced diamond zonal search for 16x16 blocks and half-pixel
refinement for 16x16 blocks. @samp{x1} and @samp{log} are aliases for
@samp{phods}.
@item epzs
Enable all of the things described above, plus advanced diamond zonal
search for 8x8 blocks, half-pixel refinement for 8x8 blocks, and motion
estimation on chroma planes.
@item full
Enable all of the things described above, plus extended 16x16 and 8x8
blocks search.
@end table
@item mbd
Set macroblock decision algorithm. Possible values in the increasing
order of quality:
@table @samp
@item simple
Use macroblock comparing function algorithm (default).
@item bits
Enable rate distortion-based half pixel and quarter pixel refinement for
16x16 blocks.
@item rd
Enable all of the things described above, plus rate distortion-based
half pixel and quarter pixel refinement for 8x8 blocks, and rate
distortion-based search using square pattern.
@end table
@end table
@section png
PNG image encoder.