Opened 23 months ago

Closed 23 months ago

Last modified 23 months ago

#7315 closed defect (invalid)

Audio Tempo demo range inaccurate

Reported by: MattMcManis Owned by:
Priority: normal Component: undetermined
Version: git-master Keywords:
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no


On the Wiki, atempo Filter states:

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)"

Change History (3)

comment:1 follow-up: Changed 23 months ago by cehoyos

  • Component changed from wiki to undetermined
  • Keywords tempo afilter filter audio removed
  • Resolution set to invalid
  • Status changed from new to closed

Please test current FFmpeg git head before reporting issues here.

comment:2 Changed 23 months ago by Gyan

I think it's time hosted docs for each minor release in addition to master branch with a prominent notice on top of each page that indicates version being referenced and links to docs for other versions.

Since docs in release branches don't get updated all that often, regeneration interval can be weekly if not longer.

comment:3 in reply to: ↑ 1 Changed 23 months ago by llogan

Just to clarify: your ffmpeg is too old. The atempo filter has recently been updated to a max value of 100. The online documentation (which is separate from the wiki) is synced to the git master branch. If you must use an old version of ffmpeg then please refer to your local documentation, such as man ffmpeg-filters or ffmpeg -h filter=atempo.

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