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Diffstat (limited to 'doc')
-rw-r--r-- | doc/filters.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index f2767cb974..a354e9703e 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -406,6 +406,24 @@ amovie=file.ogg [a] ; amovie=file.mp3 [b] ; [a2] [b2] amerge @end example +@section atempo + +Adjust audio tempo. + +The filter accepts exactly one parameter, the audio tempo. If not +specified then the filter will assume nominal 1.0 tempo. Tempo must +be in the [0.5, 2.0] range. + +For example, to slow down audio to 80% tempo: +@example +atempo=0.8 +@end example + +For example, to speed up audio to 125% tempo: +@example +atempo=1.25 +@end example + @section earwax Make audio easier to listen to on headphones. |