Hi!
Attached patch as suggested by Hendrik might fix ticket #4564.
Please comment, Carl Eugen
diff --git a/doc/resampler.texi b/doc/resampler.texi
index f9eef03..c73d402 100644
--- a/doc/resampler.texi
+++ b/doc/resampler.texi
@@ -66,8 +66,8 @@ Set rematrix volume. Default value is 1.0.
@item rematrix_maxval
Set maximum output value for rematrixing.
-This can be used to prevent clipping vs. preventing volumn reduction
-A value of 1.0 prevents cliping.
+This can be used to prevent clipping vs. preventing volume reduction
+The default value of 1.0 prevents cliping.
@item flags, swr_flags
Set flags used by the converter. Default value is 0.
diff --git a/libswresample/options.c b/libswresample/options.c
index de84672..b755222 100644
--- a/libswresample/options.c
+++ b/libswresample/options.c
@@ -62,7 +62,7 @@ static const AVOption options[]={
{"lfe_mix_level" , "set LFE mix level" , OFFSET(lfe_mix_level
), AV_OPT_TYPE_FLOAT, {.dbl=0 }, -32 , 32 ,
PARAM},
{"rmvol" , "set rematrix volume" ,
OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 },
-1000 , 1000 , PARAM},
{"rematrix_volume" , "set rematrix volume" ,
OFFSET(rematrix_volume), AV_OPT_TYPE_FLOAT, {.dbl=1.0 },
-1000 , 1000 , PARAM},
-{"rematrix_maxval" , "set rematrix maxval" ,
OFFSET(rematrix_maxval), AV_OPT_TYPE_FLOAT, {.dbl=0.0 }, 0
, 1000 , PARAM},
+{"rematrix_maxval" , "set rematrix maxval" ,
OFFSET(rematrix_maxval), AV_OPT_TYPE_FLOAT, {.dbl=1.0 }, 0
, 1000 , PARAM},
{"flags" , "set flags" , OFFSET(flags
), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX ,
PARAM, "flags"},
{"swr_flags" , "set flags" , OFFSET(flags
), AV_OPT_TYPE_FLAGS, {.i64=0 }, 0 , UINT_MAX ,
PARAM, "flags"},
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