ahistogram
Convert input audio to a video output, displaying the volume histogram.
The filter accepts the following options:
- dmode
Specify how histogram is calculated.
It accepts the following values:
- ‘single’
Use single histogram for all channels.
- ‘separate’
Use separate histogram for each channel.
Default is
single.- rate, r
Set frame rate, expressed as number of frames per second. Default value is "25".
- size, s
Specify the video size for the output. For the syntax of this option, check the (ffmpeg-utils)"Video size" section in the ffmpeg-utils manual. Default value is
hd720.- scale
Set display scale.
It accepts the following values:
- ‘log’
logarithmic
- ‘sqrt’
square root
- ‘cbrt’
cubic root
- ‘lin’
linear
- ‘rlog’
reverse logarithmic
Default is
log.- ascale
Set amplitude scale.
It accepts the following values:
- ‘log’
logarithmic
- ‘lin’
linear
Default is
log.- acount
Set how much frames to accumulate in histogram. Default is 1. Setting this to -1 accumulates all frames.
- rheight
Set histogram ratio of window height.
- slide
Set sonogram sliding.
It accepts the following values:
- ‘replace’
replace old rows with new ones.
- ‘scroll’
scroll from top to bottom.
Default is
replace.- hmode
Set histogram mode.
It accepts the following values:
- ‘abs’
Use absolute values of samples.
- ‘sign’
Use untouched values of samples.
Default is
abs.