The @var{ac3} encoder uses floating-point math, while the @var{ac3_fixed}
encoder only uses fixed-point integer math. This does not mean that one is
always faster, just that one or the other may be better suited to a
-particular system. The floating-point encoder will generally produce better
-quality audio for a given bitrate. The @var{ac3_fixed} encoder is not the
-default codec for any of the output formats, so it must be specified explicitly
-using the option @code{-acodec ac3_fixed} in order to use it.
+particular system. The @var{ac3_fixed} encoder is not the default codec for
+any of the output formats, so it must be specified explicitly using the option
+@code{-acodec ac3_fixed} in order to use it.
@subsection AC-3 Metadata
@item packet_loss (@emph{expect-loss})
Set expected packet loss percentage. The default is 0.
+@item fec (@emph{n/a})
+Enable inband forward error correction. @option{packet_loss} must be non-zero
+to take advantage - frequency of FEC 'side-data' is proportional to expected packet loss.
+Default is disabled.
+
@item application (N.A.)
Set intended application type. Valid options are listed below:
@end table
-@anchor{libwavpack}
-@section libwavpack
-
-A wrapper providing WavPack encoding through libwavpack.
-
-Only lossless mode using 32-bit integer samples is supported currently.
-
-Requires the presence of the libwavpack headers and library during
-configuration. You need to explicitly configure the build with
-@code{--enable-libwavpack}.
-
-Note that a libavcodec-native encoder for the WavPack codec exists so users can
-encode audios with this codec without using this encoder. See @ref{wavpackenc}.
-
-@subsection Options
-
-@command{wavpack} command line utility's corresponding options are listed in
-parentheses, if any.
-
-@table @option
-@item frame_size (@emph{--blocksize})
-Default is 32768.
-
-@item compression_level
-Set speed vs. compression tradeoff. Acceptable arguments are listed below:
-
-@table @samp
-@item 0 (@emph{-f})
-Fast mode.
-
-@item 1
-Normal (default) settings.
-
-@item 2 (@emph{-h})
-High quality.
-
-@item 3 (@emph{-hh})
-Very high quality.
-
-@item 4-8 (@emph{-hh -x}@var{EXTRAPROC})
-Same as @samp{3}, but with extra processing enabled.
-
-@samp{4} is the same as @option{-x2} and @samp{8} is the same as @option{-x6}.
-
-@end table
-@end table
-
@anchor{mjpegenc}
@section mjpeg
WavPack lossless audio encoder.
-This is a libavcodec-native WavPack encoder. There is also an encoder based on
-libwavpack, but there is virtually no reason to use that encoder.
-
-See also @ref{libwavpack}.
-
@subsection Options
The equivalent options for @command{wavpack} command line utility are listed in
@file{libavcodec/wavpackenc.c}.
@item compression_level (@emph{-f}, @emph{-h}, @emph{-hh}, and @emph{-x})
-This option's syntax is consistent with @ref{libwavpack}'s.
@end table
@subsubsection Private options
A description of some of the currently available video encoders
follows.
+@section a64_multi, a64_multi5
+
+A64 / Commodore 64 multicolor charset encoder. @code{a64_multi5} is extended with 5th color (colram).
+
+@section GIF
+
+GIF image/animation encoder.
+
+@subsection Options
+
+@table @option
+@item gifflags @var{integer}
+Sets the flags used for GIF encoding.
+
+@table @option
+@item offsetting
+Enables picture offsetting.
+
+Default is enabled.
+
+@item transdiff
+Enables transparency detection between frames.
+
+Default is enabled.
+
+@end table
+
+@item gifimage @var{integer}
+Enables encoding one full GIF image per frame, rather than an animated GIF.
+
+Default value is @option{0}.
+
+@item global_palette @var{integer}
+Writes a palette to the global GIF header where feasible.
+
+If disabled, every frame will always have a palette written, even if there
+is a global palette supplied.
+
+Default value is @option{1}.
+
+@end table
+
@section Hap
Vidvox Hap video encoder.
@subsection Options
@table @option
-@item format
+@item format @var{integer}
Can be set to either @code{j2k} or @code{jp2} (the default) that
makes it possible to store non-rgb pix_fmts.
+@item tile_width @var{integer}
+Sets tile width. Range is 1 to 1073741824. Default is 256.
+
+@item tile_height @var{integer}
+Sets tile height. Range is 1 to 1073741824. Default is 256.
+
+@item pred @var{integer}
+Allows setting the discrete wavelet transform (DWT) type
+@table @option
+@item dwt97int (Lossy)
+@item dwt53 (Lossless)
+@end table
+Default is @code{dwt97int}
+
+@item sop @var{boolean}
+Enable this to add SOP marker at the start of each packet. Disabled by default.
+
+@item eph @var{boolean}
+Enable this to add EPH marker at the end of each packet header. Disabled by default.
+
+@item prog @var{integer}
+Sets the progression order to be used by the encoder.
+Possible values are:
+@table @option
+@item lrcp
+@item rlcp
+@item rpcl
+@item pcrl
+@item cprl
+@end table
+Set to @code{lrcp} by default.
+
+@item layer_rates @var{string}
+By default, when this option is not used, compression is done using the quality metric.
+This option allows for compression using compression ratio. The compression ratio for each
+level could be specified. The compression ratio of a layer @code{l} species the what ratio of
+total file size is contained in the first @code{l} layers.
+
+Example usage:
+
+@example
+ffmpeg -i input.bmp -c:v jpeg2000 -layer_rates "100,10,1" output.j2k
+@end example
+
+This would compress the image to contain 3 layers, where the data contained in the
+first layer would be compressed by 1000 times, compressed by 100 in the first two layers,
+and shall contain all data while using all 3 layers.
+
@end table
@section librav1e
@item enable-smooth-interintra (@emph{boolean}) (Requires libaom >= v2.0.0)
Enable smooth interintra mode. Default is true.
+@item aom-params
+Set libaom options using a list of @var{key}=@var{value} pairs separated
+by ":". For a list of supported options, see @command{aomenc --help} under the
+section "AV1 Specific Options".
+
+For example to specify libaom encoding options with @option{-aom-params}:
+
+@example
+ffmpeg -i input -c:v libaom-av1 -b:v 500K -aom-params tune=psnr:enable-tpl-model=1 output.mp4
+@end example
+
@end table
@section libsvtav1
The valid range is [0, 10000]. 0 (default) uses standard VBR.
@item enable-tpl @var{boolean}
Enable temporal dependency model.
+@item ref-frame-config
+Using per-frame metadata, set members of the structure @code{vpx_svc_ref_frame_config_t} in @code{vpx/vp8cx.h} to fine-control referencing schemes and frame buffer management.
+@*Use a :-separated list of key=value pairs.
+For example,
+@example
+av_dict_set(&av_frame->metadata, "ref-frame-config", \
+"rfc_update_buffer_slot=7:rfc_lst_fb_idx=0:rfc_gld_fb_idx=1:rfc_alt_fb_idx=2:rfc_reference_last=0:rfc_reference_golden=0:rfc_reference_alt_ref=0");
+@end example
+@table @option
+@item rfc_update_buffer_slot
+Indicates the buffer slot number to update
+@item rfc_update_last
+Indicates whether to update the LAST frame
+@item rfc_update_golden
+Indicates whether to update GOLDEN frame
+@item rfc_update_alt_ref
+Indicates whether to update ALT_REF frame
+@item rfc_lst_fb_idx
+LAST frame buffer index
+@item rfc_gld_fb_idx
+GOLDEN frame buffer index
+@item rfc_alt_fb_idx
+ALT_REF frame buffer index
+@item rfc_reference_last
+Indicates whether to reference LAST frame
+@item rfc_reference_golden
+Indicates whether to reference GOLDEN frame
+@item rfc_reference_alt_ref
+Indicates whether to reference ALT_REF frame
+@item rfc_reference_duration
+Indicates frame duration
+@end table
@end table
@end table
@subsection Supported Pixel Formats
x264 supports 8- to 10-bit color spaces. The exact bit depth is controlled at
-x264's configure time. FFmpeg only supports one bit depth in one particular
-build. In other words, it is not possible to build one FFmpeg with multiple
-versions of x264 with different bit depths.
+x264's configure time.
@subsection Options
projects / ffmpeg / blobdiff