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avfilter/af_sidechaincompress: change default makeup gain to 1

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This avoids producing out of range or clipped samples.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-05-20 12:34:51 +02:00
parent 64ea4d102a
commit e8ae23db27
2 changed files with 5 additions and 5 deletions
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8
doc/filters.texi
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@ -357,8 +357,8 @@ The filter accepts the following options:
Set input gain. Default is 1. Range is between 0.015625 and 64. Set input gain. Default is 1. Range is between 0.015625 and 64.
@item threshold @item threshold
If a signal of second stream rises above this level it will affect the gain If a signal of stream rises above this level it will affect the gain
reduction of the first stream. reduction.
By default it is 0.125. Range is between 0.00097563 and 1. By default it is 0.125. Range is between 0.00097563 and 1.
@item ratio @item ratio
@ -376,7 +376,7 @@ reduction is decreased again. Default is 250. Range is between 0.01 and 9000.
@item makeup @item makeup
Set the amount by how much signal will be amplified after processing. Set the amount by how much signal will be amplified after processing.
Default is 2. Range is from 1 and 64. Default is 1. Range is from 1 to 64.
@item knee @item knee
Curve the sharp knee around the threshold to enter gain reduction more softly. Curve the sharp knee around the threshold to enter gain reduction more softly.
@ -3340,7 +3340,7 @@ reduction is decreased again. Default is 250. Range is between 0.01 and 9000.
@item makeup @item makeup
Set the amount by how much signal will be amplified after processing. Set the amount by how much signal will be amplified after processing.
Default is 2. Range is from 1 and 64. Default is 1. Range is from 1 to 64.
@item knee @item knee
Curve the sharp knee around the threshold to enter gain reduction more softly. Curve the sharp knee around the threshold to enter gain reduction more softly.

2
libavfilter/af_sidechaincompress.c
View File

@ -72,7 +72,7 @@ static const AVOption options[] = {
{ "ratio", "set ratio", OFFSET(ratio), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 20, A|F }, { "ratio", "set ratio", OFFSET(ratio), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 20, A|F },
{ "attack", "set attack", OFFSET(attack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 0.01, 2000, A|F }, { "attack", "set attack", OFFSET(attack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 0.01, 2000, A|F },
{ "release", "set release", OFFSET(release), AV_OPT_TYPE_DOUBLE, {.dbl=250}, 0.01, 9000, A|F }, { "release", "set release", OFFSET(release), AV_OPT_TYPE_DOUBLE, {.dbl=250}, 0.01, 9000, A|F },
{ "makeup", "set make up gain", OFFSET(makeup), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 64, A|F }, { "makeup", "set make up gain", OFFSET(makeup), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 64, A|F },
{ "knee", "set knee", OFFSET(knee), AV_OPT_TYPE_DOUBLE, {.dbl=2.82843}, 1, 8, A|F }, { "knee", "set knee", OFFSET(knee), AV_OPT_TYPE_DOUBLE, {.dbl=2.82843}, 1, 8, A|F },
{ "link", "set link type", OFFSET(link), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, A|F, "link" }, { "link", "set link type", OFFSET(link), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, A|F, "link" },
{ "average", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A|F, "link" }, { "average", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A|F, "link" },