Default value is 0.
+@item eld_v2
+Enable ELDv2 (LD-MPS extension for ELD stereo signals) for ELDv2 if set to 1,
+disabled if set to 0.
+
+Note that option is available when fdk-aac version (AACENCODER_LIB_VL0.AACENCODER_LIB_VL1.AACENCODER_LIB_VL2) > (4.0.0).
+
+Default value is 0.
+
@item signaling
Set SBR/PS signaling style.
Enable use of alternate reference frames. Defaults to the internal
default of the library.
+@item arnr-max-frames (@emph{frames})
+Set altref noise reduction max frame count. Default is -1.
+
+@item arnr-strength (@emph{strength})
+Set altref noise reduction filter strength. Range is -1 to 6. Default is -1.
+
+@item aq-mode (@emph{aq-mode})
+Set adaptive quantization mode. Possible values:
+
+@table @samp
+@item none (@emph{0})
+Disabled.
+
+@item variance (@emph{1})
+Variance-based.
+
+@item complexity (@emph{2})
+Complexity-based.
+
+@item cyclic (@emph{3})
+Cyclic refresh.
+@end table
+
@item lag-in-frames
Set the maximum number of frames which the encoder may keep in flight
at any one time for lookahead purposes. Defaults to the internal
has refilled above the threshold. Defaults to zero (no frames are
dropped).
+@item denoise-noise-level (@emph{level})
+Amount of noise to be removed for grain synthesis. Grain synthesis is disabled if
+this option is not set or set to 0.
+
+@item denoise-block-size (@emph{pixels})
+Block size used for denoising for grain synthesis. If not set, AV1 codec
+uses the default value of 32.
+
+@item undershoot-pct (@emph{pct})
+Set datarate undershoot (min) percentage of the target bitrate. Range is -1 to 100.
+Default is -1.
+
+@item overshoot-pct (@emph{pct})
+Set datarate overshoot (max) percentage of the target bitrate. Range is -1 to 1000.
+Default is -1.
+
+@item minsection-pct (@emph{pct})
+Minimum percentage variation of the GOP bitrate from the target bitrate. If minsection-pct
+is not set, the libaomenc wrapper computes it as follows: @code{(minrate * 100 / bitrate)}.
+Range is -1 to 100. Default is -1 (unset).
+
+@item maxsection-pct (@emph{pct})
+Maximum percentage variation of the GOP bitrate from the target bitrate. If maxsection-pct
+is not set, the libaomenc wrapper computes it as follows: @code{(maxrate * 100 / bitrate)}.
+Range is -1 to 5000. Default is -1 (unset).
+
+@item frame-parallel (@emph{boolean})
+Enable frame parallel decodability features. Default is true.
+
@item tiles
-Set the number of tiles to encode the input video with, as colums x
+Set the number of tiles to encode the input video with, as columns x
rows. Larger numbers allow greater parallelism in both encoding and
decoding, but may decrease coding efficiency. Defaults to the minimum
number of tiles required by the size of the input video (this is 1x1
@item row-mt (Requires libaom >= 1.0.0-759-g90a15f4f2)
Enable row based multi-threading. Disabled by default.
+@item enable-cdef (@emph{boolean})
+Enable Constrained Directional Enhancement Filter. The libaom-av1
+encoder enables CDEF by default.
+
+@item enable-global-motion (@emph{boolean})
+Enable the use of global motion for block prediction. Default is true.
+
+@item enable-intrabc (@emph{boolean})
+Enable block copy mode for intra block prediction. This mode is
+useful for screen content. Default is true.
+
@end table
@section libkvazaar
@item auto-alt-ref
Enable use of alternate reference frames (2-pass only).
Values greater than 1 enable multi-layer alternate reference frames (VP9 only).
-@item arnr-max-frames
+@item arnr-maxframes
Set altref noise reduction max frame count.
@item arnr-type
Set altref noise reduction filter type: backward, forward, centered.
@item error-resilient
Enable error resiliency features.
+@item sharpness @var{integer}
+Increase sharpness at the expense of lower PSNR.
+The valid range is [0, 7].
+
@item VP8-specific options
@table @option
@item ts-parameters
during configuration. You need to explicitly configure the build with
@option{--enable-libxavs2}.
+The following standard libavcodec options are used:
+@itemize
+@item
+@option{b} / @option{bit_rate}
+@item
+@option{g} / @option{gop_size}
+@item
+@option{bf} / @option{max_b_frames}
+@end itemize
+
+The encoder also has its own specific options:
@subsection Options
@table @option
For example to specify libxavs2 encoding options with @option{-xavs2-params}:
@example
-ffmpeg -i input -c:v libxavs2 -xavs2-params preset_level=5 output.avs2
+ffmpeg -i input -c:v libxavs2 -xavs2-params RdoqLevel=0 output.avs2
@end example
@end table
indicating the source of the video pictures. The default is @samp{unspecified},
can be @samp{component}, @samp{pal}, @samp{ntsc}, @samp{secam} or @samp{mac}.
For maximum compatibility, use @samp{component}.
+@item a53cc @var{boolean}
+Import closed captions (which must be ATSC compatible format) into output.
+Default is 1 (on).
@end table
@section png
@end itemize
All encoders support the following options:
-@itemize
-@item
-@option{low_power}
-
+@table @option
+@item low_power
Some drivers/platforms offer a second encoder for some codecs intended to use
less power than the default encoder; setting this option will attempt to use
that encoder. Note that it may support a reduced feature set, so some other
options may not be available in this mode.
-@end itemize
+
+@item idr_interval
+Set the number of normal intra frames between full-refresh (IDR) frames in
+open-GOP mode. The intra frames are still IRAPs, but will not include global
+headers and may have non-decodable leading pictures.
+
+@item b_depth
+Set the B-frame reference depth. When set to one (the default), all B-frames
+will refer only to P- or I-frames. When set to greater values multiple layers
+of B-frames will be present, frames in each layer only referring to frames in
+higher layers.
+
+@item rc_mode
+Set the rate control mode to use. A given driver may only support a subset of
+modes.
+
+Possible modes:
+@table @option
+@item auto
+Choose the mode automatically based on driver support and the other options.
+This is the default.
+@item CQP
+Constant-quality.
+@item CBR
+Constant-bitrate.
+@item VBR
+Variable-bitrate.
+@item ICQ
+Intelligent constant-quality.
+@item QVBR
+Quality-defined variable-bitrate.
+@item AVBR
+Average variable bitrate.
+@end table
+
+@end table
Each encoder also has its own specific options:
@table @option
projects / ffmpeg / blobdiff