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audio/filter: remove delay audio filter

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Similar filter is available in libavfilter.
This commit is contained in:
Paul B Mahol
2016-08-12 19:29:13 +02:00
committed by wm4
parent ec4a8bdb3d
commit e2a54bb1ca
4 changed files with 0 additions and 225 deletions
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DOCS/man/af.rst
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@@ -312,34 +312,6 @@ Available filters are:
``mpv '--af=format=channels=5.1' '--audio-channels=5.1'`` would always force
remixing audio to 5.1 and output it like this.
``delay[=[ch1,ch2,...]]``
Delays the sound to the loudspeakers such that the sound from the
different channels arrives at the listening position simultaneously. It is
only useful if you have more than 2 loudspeakers.
``[ch1,ch2,...]``
The delay in ms that should be imposed on each channel (floating point
number between 0 and 1000).
To calculate the required delay for the different channels, do as follows:
1. Measure the distance to the loudspeakers in meters in relation to your
listening position, giving you the distances s1 to s5 (for a 5.1
system). There is no point in compensating for the subwoofer (you will
not hear the difference anyway).
2. Subtract the distances s1 to s5 from the maximum distance, i.e.
``s[i] = max(s) - s[i]; i = 1...5``.
3. Calculate the required delays in ms as ``d[i] = 1000*s[i]/342; i =
1...5``.
.. admonition:: Example
``mpv --af=delay=[10.5,10.5,0,0,7,0] media.avi``
Would delay front left and right by 10.5 ms, the two rear channels
and the subwoofer by 0 ms and the center channel by 7 ms.
``drc[=method:target]``
Applies dynamic range compression. This maximizes the volume by compressing
the audio signal's dynamic range. (Formerly called ``volnorm``.)