virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

doc/filters: add some afftdn examples

Browse Source
This commit is contained in:
Paul B Mahol 2022-03-17 10:18:08 +01:00
parent 44fb2463a3
commit 242c07982a
1 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
doc/filters.texi
View File

@ -1396,6 +1396,30 @@ Default value is @code{none}.
This filter supports the some above mentioned options as @ref{commands}.
@subsection Examples
@itemize
@item
Reduce white noise by 10dB, and use previously measured noise floor of -40dB:
@example
afftdn=nr=10:nf=-40
@end example
@item
Reduce white noise by 10dB, also set initial noise floor to -80dB and enable automatic
tracking of noise floor so noise floor will gradually change during processing:
@example
afftdn=nr=10:nf=-80:tn=1
@end example
@item
Reduce noise by 20dB, using noise floor of -40dB and using commands to take noise profile
of first 0.4 seconds of input audio:
@example
asendcmd=0.0 afftdn sn start,asendcmd=0.4 afftdn sn stop,afftdn=nr=20:nf=-40
@end example
@end itemize
@section afftfilt
Apply arbitrary expressions to samples in frequency domain.