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doc/filters: move drawgraph to video filters chapter

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Paul B Mahol 2019-10-30 17:55:44 +01:00
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doc/filters.texi
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@ -9037,6 +9037,111 @@ The command accepts the same syntax of the corresponding option.
If the specified expression is not valid, it is kept at its current If the specified expression is not valid, it is kept at its current
value. value.
@anchor{drawgraph}
@section drawgraph
Draw a graph using input video metadata.
It accepts the following parameters:
@table @option
@item m1
Set 1st frame metadata key from which metadata values will be used to draw a graph.
@item fg1
Set 1st foreground color expression.
@item m2
Set 2nd frame metadata key from which metadata values will be used to draw a graph.
@item fg2
Set 2nd foreground color expression.
@item m3
Set 3rd frame metadata key from which metadata values will be used to draw a graph.
@item fg3
Set 3rd foreground color expression.
@item m4
Set 4th frame metadata key from which metadata values will be used to draw a graph.
@item fg4
Set 4th foreground color expression.
@item min
Set minimal value of metadata value.
@item max
Set maximal value of metadata value.
@item bg
Set graph background color. Default is white.
@item mode
Set graph mode.
Available values for mode is:
@table @samp
@item bar
@item dot
@item line
@end table
Default is @code{line}.
@item slide
Set slide mode.
Available values for slide is:
@table @samp
@item frame
Draw new frame when right border is reached.
@item replace
Replace old columns with new ones.
@item scroll
Scroll from right to left.
@item rscroll
Scroll from left to right.
@item picture
Draw single picture.
@end table
Default is @code{frame}.
@item size
Set size of graph video. For the syntax of this option, check the
@ref{video size syntax,,"Video size" section in the ffmpeg-utils manual,ffmpeg-utils}.
The default value is @code{900x256}.
The foreground color expressions can use the following variables:
@table @option
@item MIN
Minimal value of metadata value.
@item MAX
Maximal value of metadata value.
@item VAL
Current metadata key value.
@end table
The color is defined as 0xAABBGGRR.
@end table
Example using metadata from @ref{signalstats} filter:
@example
signalstats,drawgraph=lavfi.signalstats.YAVG:min=0:max=255
@end example
Example using metadata from @ref{ebur128} filter:
@example
ebur128=metadata=1,adrawgraph=lavfi.r128.M:min=-120:max=5
@end example
@section drawgrid @section drawgrid
Draw a grid on the input image. Draw a grid on the input image.
@ -21498,6 +21603,11 @@ draw channels. Unrecognized or missing colors will be replaced
by white color. by white color.
@end table @end table
@section adrawgraph
Draw a graph using input audio metadata.
See @ref{drawgraph}
@section agraphmonitor @section agraphmonitor
See @ref{graphmonitor}. See @ref{graphmonitor}.
@ -21863,111 +21973,6 @@ This filter supports the following commands:
Close the current segment and step to the next one Close the current segment and step to the next one
@end table @end table
@section drawgraph, adrawgraph
Draw a graph using input video or audio metadata.
It accepts the following parameters:
@table @option
@item m1
Set 1st frame metadata key from which metadata values will be used to draw a graph.
@item fg1
Set 1st foreground color expression.
@item m2
Set 2nd frame metadata key from which metadata values will be used to draw a graph.
@item fg2
Set 2nd foreground color expression.
@item m3
Set 3rd frame metadata key from which metadata values will be used to draw a graph.
@item fg3
Set 3rd foreground color expression.
@item m4
Set 4th frame metadata key from which metadata values will be used to draw a graph.
@item fg4
Set 4th foreground color expression.
@item min
Set minimal value of metadata value.
@item max
Set maximal value of metadata value.
@item bg
Set graph background color. Default is white.
@item mode
Set graph mode.
Available values for mode is:
@table @samp
@item bar
@item dot
@item line
@end table
Default is @code{line}.
@item slide
Set slide mode.
Available values for slide is:
@table @samp
@item frame
Draw new frame when right border is reached.
@item replace
Replace old columns with new ones.
@item scroll
Scroll from right to left.
@item rscroll
Scroll from left to right.
@item picture
Draw single picture.
@end table
Default is @code{frame}.
@item size
Set size of graph video. For the syntax of this option, check the
@ref{video size syntax,,"Video size" section in the ffmpeg-utils manual,ffmpeg-utils}.
The default value is @code{900x256}.
The foreground color expressions can use the following variables:
@table @option
@item MIN
Minimal value of metadata value.
@item MAX
Maximal value of metadata value.
@item VAL
Current metadata key value.
@end table
The color is defined as 0xAABBGGRR.
@end table
Example using metadata from @ref{signalstats} filter:
@example
signalstats,drawgraph=lavfi.signalstats.YAVG:min=0:max=255
@end example
Example using metadata from @ref{ebur128} filter:
@example
ebur128=metadata=1,adrawgraph=lavfi.r128.M:min=-120:max=5
@end example
@anchor{ebur128} @anchor{ebur128}
@section ebur128 @section ebur128