From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/share/man/man1/ffmpeg-resampler.1 | 415 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 415 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/share/man/man1/ffmpeg-resampler.1 b/module/VideoPlayer/lib/linux/ffmpeg/share/man/man1/ffmpeg-resampler.1
new file mode 100644
index 0000000..659c792
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/share/man/man1/ffmpeg-resampler.1
@@ -0,0 +1,415 @@
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+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "FFMPEG-RESAMPLER 1"
+.TH FFMPEG-RESAMPLER 1 " " " " " "
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+ffmpeg\-resampler \- FFmpeg Resampler
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+The FFmpeg resampler provides a high-level interface to the
+libswresample library audio resampling utilities. In particular it
+allows one to perform audio resampling, audio channel layout rematrixing,
+and convert audio format and packing layout.
+.SH "RESAMPLER OPTIONS"
+.IX Header "RESAMPLER OPTIONS"
+The audio resampler supports the following named options.
+.PP
+Options may be set by specifying \-\fIoption\fR \fIvalue\fR in the
+FFmpeg tools, \fIoption\fR=\fIvalue\fR for the aresample filter,
+by setting the value explicitly in the
+\&\f(CW\*(C`SwrContext\*(C'\fR options or using the \fIlibavutil/opt.h\fR \s-1API\s0 for
+programmatic use.
+.IP "\fBich, in_channel_count\fR" 4
+.IX Item "ich, in_channel_count"
+Set the number of input channels. Default value is 0. Setting this
+value is not mandatory if the corresponding channel layout
+\&\fBin_channel_layout\fR is set.
+.IP "\fBoch, out_channel_count\fR" 4
+.IX Item "och, out_channel_count"
+Set the number of output channels. Default value is 0. Setting this
+value is not mandatory if the corresponding channel layout
+\&\fBout_channel_layout\fR is set.
+.IP "\fBuch, used_channel_count\fR" 4
+.IX Item "uch, used_channel_count"
+Set the number of used input channels. Default value is 0. This option is
+only used for special remapping.
+.IP "\fBisr, in_sample_rate\fR" 4
+.IX Item "isr, in_sample_rate"
+Set the input sample rate. Default value is 0.
+.IP "\fBosr, out_sample_rate\fR" 4
+.IX Item "osr, out_sample_rate"
+Set the output sample rate. Default value is 0.
+.IP "\fBisf, in_sample_fmt\fR" 4
+.IX Item "isf, in_sample_fmt"
+Specify the input sample format. It is set by default to \f(CW\*(C`none\*(C'\fR.
+.IP "\fBosf, out_sample_fmt\fR" 4
+.IX Item "osf, out_sample_fmt"
+Specify the output sample format. It is set by default to \f(CW\*(C`none\*(C'\fR.
+.IP "\fBtsf, internal_sample_fmt\fR" 4
+.IX Item "tsf, internal_sample_fmt"
+Set the internal sample format. Default value is \f(CW\*(C`none\*(C'\fR.
+This will automatically be chosen when it is not explicitly set.
+.IP "\fBicl, in_channel_layout\fR" 4
+.IX Item "icl, in_channel_layout"
+.PD 0
+.IP "\fBocl, out_channel_layout\fR" 4
+.IX Item "ocl, out_channel_layout"
+.PD
+Set the input/output channel layout.
+.Sp
+See \fBthe Channel Layout section in the \f(BIffmpeg\-utils\fB\|(1) manual\fR
+for the required syntax.
+.IP "\fBclev, center_mix_level\fR" 4
+.IX Item "clev, center_mix_level"
+Set the center mix level. It is a value expressed in deciBel, and must be
+in the interval [\-32,32].
+.IP "\fBslev, surround_mix_level\fR" 4
+.IX Item "slev, surround_mix_level"
+Set the surround mix level. It is a value expressed in deciBel, and must
+be in the interval [\-32,32].
+.IP "\fBlfe_mix_level\fR" 4
+.IX Item "lfe_mix_level"
+Set \s-1LFE\s0 mix into non \s-1LFE\s0 level. It is used when there is a \s-1LFE\s0 input but no
+\&\s-1LFE\s0 output. It is a value expressed in deciBel, and must
+be in the interval [\-32,32].
+.IP "\fBrmvol, rematrix_volume\fR" 4
+.IX Item "rmvol, rematrix_volume"
+Set rematrix volume. Default value is 1.0.
+.IP "\fBrematrix_maxval\fR" 4
+.IX Item "rematrix_maxval"
+Set maximum output value for rematrixing.
+This can be used to prevent clipping vs. preventing volume reduction.
+A value of 1.0 prevents clipping.
+.IP "\fBflags, swr_flags\fR" 4
+.IX Item "flags, swr_flags"
+Set flags used by the converter. Default value is 0.
+.Sp
+It supports the following individual flags:
+.RS 4
+.IP "\fBres\fR" 4
+.IX Item "res"
+force resampling, this flag forces resampling to be used even when the
+input and output sample rates match.
+.RE
+.RS 4
+.RE
+.IP "\fBdither_scale\fR" 4
+.IX Item "dither_scale"
+Set the dither scale. Default value is 1.
+.IP "\fBdither_method\fR" 4
+.IX Item "dither_method"
+Set dither method. Default value is 0.
+.Sp
+Supported values:
+.RS 4
+.IP "\fBrectangular\fR" 4
+.IX Item "rectangular"
+select rectangular dither
+.IP "\fBtriangular\fR" 4
+.IX Item "triangular"
+select triangular dither
+.IP "\fBtriangular_hp\fR" 4
+.IX Item "triangular_hp"
+select triangular dither with high pass
+.IP "\fBlipshitz\fR" 4
+.IX Item "lipshitz"
+select Lipshitz noise shaping dither.
+.IP "\fBshibata\fR" 4
+.IX Item "shibata"
+select Shibata noise shaping dither.
+.IP "\fBlow_shibata\fR" 4
+.IX Item "low_shibata"
+select low Shibata noise shaping dither.
+.IP "\fBhigh_shibata\fR" 4
+.IX Item "high_shibata"
+select high Shibata noise shaping dither.
+.IP "\fBf_weighted\fR" 4
+.IX Item "f_weighted"
+select f\-weighted noise shaping dither
+.IP "\fBmodified_e_weighted\fR" 4
+.IX Item "modified_e_weighted"
+select modified-e-weighted noise shaping dither
+.IP "\fBimproved_e_weighted\fR" 4
+.IX Item "improved_e_weighted"
+select improved-e-weighted noise shaping dither
+.RE
+.RS 4
+.RE
+.IP "\fBresampler\fR" 4
+.IX Item "resampler"
+Set resampling engine. Default value is swr.
+.Sp
+Supported values:
+.RS 4
+.IP "\fBswr\fR" 4
+.IX Item "swr"
+select the native \s-1SW\s0 Resampler; filter options precision and cheby are not
+applicable in this case.
+.IP "\fBsoxr\fR" 4
+.IX Item "soxr"
+select the SoX Resampler (where available); compensation, and filter options
+filter_size, phase_shift, exact_rational, filter_type & kaiser_beta, are not
+applicable in this case.
+.RE
+.RS 4
+.RE
+.IP "\fBfilter_size\fR" 4
+.IX Item "filter_size"
+For swr only, set resampling filter size, default value is 32.
+.IP "\fBphase_shift\fR" 4
+.IX Item "phase_shift"
+For swr only, set resampling phase shift, default value is 10, and must be in
+the interval [0,30].
+.IP "\fBlinear_interp\fR" 4
+.IX Item "linear_interp"
+Use linear interpolation when enabled (the default). Disable it if you want
+to preserve speed instead of quality when exact_rational fails.
+.IP "\fBexact_rational\fR" 4
+.IX Item "exact_rational"
+For swr only, when enabled, try to use exact phase_count based on input and
+output sample rate. However, if it is larger than \f(CW\*(C`1 << phase_shift\*(C'\fR,
+the phase_count will be \f(CW\*(C`1 << phase_shift\*(C'\fR as fallback. Default is enabled.
+.IP "\fBcutoff\fR" 4
+.IX Item "cutoff"
+Set cutoff frequency (swr: 6dB point; soxr: 0dB point) ratio; must be a float
+value between 0 and 1. Default value is 0.97 with swr, and 0.91 with soxr
+(which, with a sample-rate of 44100, preserves the entire audio band to 20kHz).
+.IP "\fBprecision\fR" 4
+.IX Item "precision"
+For soxr only, the precision in bits to which the resampled signal will be
+calculated. The default value of 20 (which, with suitable dithering, is
+appropriate for a destination bit-depth of 16) gives SoX's 'High Quality'; a
+value of 28 gives SoX's 'Very High Quality'.
+.IP "\fBcheby\fR" 4
+.IX Item "cheby"
+For soxr only, selects passband rolloff none (Chebyshev) & higher-precision
+approximation for 'irrational' ratios. Default value is 0.
+.IP "\fBasync\fR" 4
+.IX Item "async"
+For swr only, simple 1 parameter audio sync to timestamps using stretching,
+squeezing, filling and trimming. Setting this to 1 will enable filling and
+trimming, larger values represent the maximum amount in samples that the data
+may be stretched or squeezed for each second.
+Default value is 0, thus no compensation is applied to make the samples match
+the audio timestamps.
+.IP "\fBfirst_pts\fR" 4
+.IX Item "first_pts"
+For swr only, assume the first pts should be this value. The time unit is 1 / sample rate.
+This allows for padding/trimming at the start of stream. By default, no
+assumption is made about the first frame's expected pts, so no padding or
+trimming is done. For example, this could be set to 0 to pad the beginning with
+silence if an audio stream starts after the video stream or to trim any samples
+with a negative pts due to encoder delay.
+.IP "\fBmin_comp\fR" 4
+.IX Item "min_comp"
+For swr only, set the minimum difference between timestamps and audio data (in
+seconds) to trigger stretching/squeezing/filling or trimming of the
+data to make it match the timestamps. The default is that
+stretching/squeezing/filling and trimming is disabled
+(\fBmin_comp\fR = \f(CW\*(C`FLT_MAX\*(C'\fR).
+.IP "\fBmin_hard_comp\fR" 4
+.IX Item "min_hard_comp"
+For swr only, set the minimum difference between timestamps and audio data (in
+seconds) to trigger adding/dropping samples to make it match the
+timestamps. This option effectively is a threshold to select between
+hard (trim/fill) and soft (squeeze/stretch) compensation. Note that
+all compensation is by default disabled through \fBmin_comp\fR.
+The default is 0.1.
+.IP "\fBcomp_duration\fR" 4
+.IX Item "comp_duration"
+For swr only, set duration (in seconds) over which data is stretched/squeezed
+to make it match the timestamps. Must be a non-negative double float value,
+default value is 1.0.
+.IP "\fBmax_soft_comp\fR" 4
+.IX Item "max_soft_comp"
+For swr only, set maximum factor by which data is stretched/squeezed to make it
+match the timestamps. Must be a non-negative double float value, default value
+is 0.
+.IP "\fBmatrix_encoding\fR" 4
+.IX Item "matrix_encoding"
+Select matrixed stereo encoding.
+.Sp
+It accepts the following values:
+.RS 4
+.IP "\fBnone\fR" 4
+.IX Item "none"
+select none
+.IP "\fBdolby\fR" 4
+.IX Item "dolby"
+select Dolby
+.IP "\fBdplii\fR" 4
+.IX Item "dplii"
+select Dolby Pro Logic \s-1II\s0
+.RE
+.RS 4
+.Sp
+Default value is \f(CW\*(C`none\*(C'\fR.
+.RE
+.IP "\fBfilter_type\fR" 4
+.IX Item "filter_type"
+For swr only, select resampling filter type. This only affects resampling
+operations.
+.Sp
+It accepts the following values:
+.RS 4
+.IP "\fBcubic\fR" 4
+.IX Item "cubic"
+select cubic
+.IP "\fBblackman_nuttall\fR" 4
+.IX Item "blackman_nuttall"
+select Blackman Nuttall windowed sinc
+.IP "\fBkaiser\fR" 4
+.IX Item "kaiser"
+select Kaiser windowed sinc
+.RE
+.RS 4
+.RE
+.IP "\fBkaiser_beta\fR" 4
+.IX Item "kaiser_beta"
+For swr only, set Kaiser window beta value. Must be a double float value in the
+interval [2,16], default value is 9.
+.IP "\fBoutput_sample_bits\fR" 4
+.IX Item "output_sample_bits"
+For swr only, set number of used output sample bits for dithering. Must be an integer in the
+interval [0,64], default value is 0, which means it's not used.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fIffmpeg\fR\|(1), \fIffplay\fR\|(1), \fIffprobe\fR\|(1), \fIlibswresample\fR\|(3)
+.SH "AUTHORS"
+.IX Header "AUTHORS"
+The FFmpeg developers.
+.PP
+For details about the authorship, see the Git history of the project
+(git://source.ffmpeg.org/ffmpeg), e.g. by typing the command
+\&\fBgit log\fR in the FFmpeg source directory, or browsing the
+online repository at <\fBhttp://source.ffmpeg.org\fR>.
+.PP
+Maintainers for the specific components are listed in the file
+\&\fI\s-1MAINTAINERS\s0\fR in the source code tree.
--
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