[FFmpeg-trac] #7315(wiki:new): Audio Tempo demo range inaccurate

FFmpeg trac at avcodec.org
Sun Jul 15 04:19:31 EEST 2018


#7315: Audio Tempo demo range inaccurate
-------------------------------------+-------------------------------------
             Reporter:  MattMcManis  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  wiki         |                  Version:  git-
             Keywords:  tempo,       |  master
  afilter, filter, audio             |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 On the Wiki, `atempo` Filter states:

 https://ffmpeg.org/ffmpeg-filters.html#atempo

 {{{
 To speed up audio to 300% tempo: atempo=3
 }}}

 Though available Range is only `0.5 - 2`.

 {{{
 Error initializing filter 'atempo' with args '3'
 }}}

 Only daisy-chaining works for above 200%:

 {{{
 -af "atempo=sqrt(3),atempo=sqrt(3)"
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7315>
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