[FFmpeg-trac] #6201(undetermined:new): alimiter: support for compensating for attack-time-delay & side-chain version

[FFmpeg]

#6201: alimiter: support for compensating for attack-time-delay & side-chain
version
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             Reporter:  mtc          |                     Type:
               Status:  new          |  enhancement
            Component:               |                 Priority:  normal
  undetermined                       |                  Version:
             Keywords:  alimiter     |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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 1. option to disable/cancel the exact attack-time-offset (similar to
 firequalizer's zero_phase option)

 > This limiter uses lookahead technology to prevent your signal from
 distorting. It means that there is a small delay after the signal is
 processed. Keep in mind that the delay it produces is the attack time you
 set.

 2. non-offset audio may be required for a side-chain version of alimiter
 to work properly (similar to sidechaincompress & sidechaingate)

 possible use cases: run limiter on up-sampled version of audio and
 downsample results tp apply to original,
 or merging(weighted-average) 2 synchronized audio-samples one with
 clipping, but louder&clearer, the second one no-clipping but less-
 clear(quantization&noise)

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Ticket URL: <https://trac.ffmpeg.org/ticket/6201>
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