Commit ea038b99 authored by Timothy Gu's avatar Timothy Gu Committed by Paul B Mahol

doc/encoders: add documentation for libtwolame

parent 32896701
...@@ -441,6 +441,69 @@ Enables the encoder to use (on a frame by frame basis) either L/R ...@@ -441,6 +441,69 @@ Enables the encoder to use (on a frame by frame basis) either L/R
stereo or mid/side stereo. stereo or mid/side stereo.
@end multitable @end multitable
@section libtwolame
TwoLAME MP2 encoder wrapper
Requires the presence of the libtwolame headers and library during
configuration. You need to explicitly configure the build with
@code{--enable-libtwolame}.
@subsection Options Mapping
The following options are supported by the libtwolame wrapper. The
TwoLAME-equivalent options follow the FFmpeg ones and are in
parentheses.
@table @option
@item b
(b) Set bitrate in bits/s. Note that FFmpeg @code{b} option is
expressed in bits/s, twolame @code{b} in kilobits/s. The default
value is 128k.
@item q
(V) Set quality for experimental VBR support. Maximum value range is
from -50 to 50, useful range is from -10 to 10.
@item mode
(mode) Set MPEG mode. Possible values:
@table @samp
@item auto
Choose mode automatically based on the input. This is the default.
@item stereo
Stereo
@item joint_stereo
Joint stereo
@item dual_channel
Dual channel
@item mono
Mono
@end table
@item psymodel
(psyc-mode) Set psychoacoustic model to use in encoding. The argument
must be an integer between -1 and 4, inclusive. The higher the value,
the better the quality. The default value is 3.
@item energy_levels
(energy) Enable energy levels extensions when set to 1. The default
value is 0 (disabled).
@item error_protection
(protect) Enable CRC error protection when set to 1. The default value
is 0 (disabled).
@item copyright
(copyright) Set MPEG audio copyright flag when set to 1. The default
value is 0 (disabled).
@item original
(original) Set MPEG audio original flag when set to 1. The default
value is 0 (disabled).
@end table
@c man end AUDIO ENCODERS @c man end AUDIO ENCODERS
@chapter Video Encoders @chapter Video Encoders
......
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