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| author | Kyle Swanson <k@ylo.ph> | 2015-09-21 10:16:43 -0500 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2015-09-22 15:59:39 +0200 |
| commit | a9509ad3f0e148a2af2efa2eaa43f859a59af0ce (patch) | |
| tree | 6528911b4b09a75ce4b959923f93bf677b4479ec /doc | |
| parent | d9c72e0d24d3987ce8eedf8244093ac6302d655e (diff) | |
| download | ffmpeg-a9509ad3f0e148a2af2efa2eaa43f859a59af0ce.tar.gz | |
avfilter: add tremolo filter
Signed-off-by: Kyle Swanson <k@ylo.ph>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/filters.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 88cb3ce863..5bbbaf0b78 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -2568,6 +2568,25 @@ slope Determine how steep is the filter's shelf transition. @end table +@section tremolo + +Sinusoidal amplitude modulation. + +The filter accepts the following options: + +@table @option +@item f +Modulation frequency in Hertz. Modulation frequencies in the subharmonic range +(20 Hz or lower) will result in a tremolo effect. +This filter may also be used as a ring modulator by specifying +a modulation frequency higher than 20 Hz. +Range is 0.1 - 20000.0. Default value is 5.0 Hz. + +@item d +Depth of modulation as a percentage. Range is 0.0 - 1.0. +Default value is 0.5. +@end table + @section volume Adjust the input audio volume. |