On Mon, 10 Aug 2015 15:51:24 +0200, Paul B Mahol wrote:
[...]
> +@section showfreqs
> +
> +Convert input audio to video output, representing the audio power spectrum.
You can remove that comma.
> +Audio amplitude is on Y-axis while frequencies are on X-axis.
Audio amplitude is on Y-axis while frequency is on X-axis.
> +The filter accepts the following options:
> +
> +@table @option
> +@item size, s
> +Specify size of video.
For the syntax of this option, check the @ref{video size syntax,,"Video
size" section in the ffmpeg-utils manual,ffmpeg-utils}. Default is
@code{1024x512}.
> +@item mode
> +Set display mode.
> +
> +It accepts the following values:
> +@table @samp
> +@item line
> +@item bar
> +@item dot
> +
> +Specify how each frequency bin will be represented.
The above line seems to be misplaced.
> +@end table
Default is @code{bar}.
> +@item ascale
> +Set amplitude scale.
> +
> +It accepts the following values:
> +@table @samp
> +@item lin
> +Linear scale.
> +
> +@item sqrt
> +Square root scale.
> +
> +@item cbrt
> +Cubic root scale.
> +
> +@item log
> +Logarithmic scale.
> +@end table
Default is @code{log}.
> +@item fscale
> +Set frequency scale.
> +
> +It accepts the following values:
> +@table @samp
> +@item lin
> +Linear scale.
> +
> +@item log
> +Logarithmic scale.
> +@end table
Default is @code{linear}.
> +@item win_size
> +Set window size.
> +
> +It accepts the following values:
> +@table @samp
> +@item w16
> +@item w32
> +@item w64
> +@item w128
> +@item w256
> +@item w512
> +@item w1024
> +@item w2048
> +@item w4096
> +@item w8192
> +@item w16384
> +@item w32768
> +@item w65536
> +@end table
Default is @code{w2048}.
> +@item win_func
> +Set windowing function.
> +
> +It accepts the following values:
> +@table @samp
> +@item rect
> +@item bartlett
> +@item hanning
> +@item hamming
> +@item blackman
> +@item welch
> +@item flattop
> +@item bharris
> +@item bnuttall
> +@item bhann
> +@item sine
> +@item nuttall
> +@end table
Default is @code{hanning}.
> +@item overlap
> +Set window overlap. In range @code{[0, 1]}. Default is 1, which means
> optimal overlap
> +for selected window function will be picked.
> +
> +@item averaging
> +Set time averaging. Setting this to 0 will display current maximal peaks.
Default is 1.
> +@item color
> +Specify list of colors separated by space or by '|' which will be used to
> draw channel
> +frequencies. Unrecognized or missing colors will be replaced by white.
> +@end table
Can you list the acceptable colors? Would it be too annoying to allow
usage of the colors listed in ffmpeg-utils?
Please check that I got the defaults correct.
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