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doc/filters: add missing details to aphasemeter 

First output is audio and is rematrixed to stereo
This commit is contained in:
Gyan Doshi 2018-07-16 11:20:22 +05:30
parent cd86b5cfe2
commit b8c4d2b2ed
1 changed files with 8 additions and 7 deletions
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15
doc/filters.texi
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@ -18435,9 +18435,15 @@ Default is @code{replace}.
@section aphasemeter
Convert input audio to a video output, displaying the audio phase.
Measures phase of input audio, which is exported as metadata @code{lavfi.aphasemeter.phase},
representing mean phase of current audio frame. A video output can also be produced and is
enabled by default. The audio is passed through as first output.
The filter accepts the following options:
Audio will be rematrixed to stereo if it has a different channel layout. Phase value is in
range @code{[-1, 1]} where @code{-1} means left and right channels are completely out of phase
and @code{1} means channels are in phase.
The filter accepts the following options, all related to its video output:
@table @option
@item rate, r
@ -18463,11 +18469,6 @@ Set color which will be used for drawing median phase. If color is
Enable video output. Default is enabled.
@end table
The filter also exports the frame metadata @code{lavfi.aphasemeter.phase} which
represents mean phase of current audio frame. Value is in range @code{[-1, 1]}.
The @code{-1} means left and right channels are completely out of phase and
@code{1} means channels are in phase.
@section avectorscope
Convert input audio to a video output, representing the audio vector