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author | Paul B Mahol <onemda@gmail.com> | 2015-06-24 18:48:57 +0300 |
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committer | Paul B Mahol <onemda@gmail.com> | 2015-07-03 21:43:21 +0300 |
commit | c3a5702ebf1a63443efb90a692be94ae3f2f570a (patch) | |
tree | cf7e42a327b2def76ebce536ea5b08b354f1caf4 /doc/filters.texi | |
parent | 4385a1ce8f5359418c7401805331af3818913040 (diff) |
lavfi: add (a)drawgraph filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'doc/filters.texi')
-rw-r--r-- | doc/filters.texi | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index ffbcc223fe..ed3362183a 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4000,6 +4000,105 @@ drawbox=x=-t:y=0.5*(ih-iw/2.4)-t:w=iw+t*2:h=iw/2.4+t*2:t=2:c=red @end example @end itemize +@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. +@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 Draw a grid on the input image. @@ -8639,6 +8738,7 @@ Swap the second and third planes of the input: ffmpeg -i INPUT -vf shuffleplanes=0:2:1:3 OUTPUT @end example +@anchor{signalstats} @section signalstats Evaluate various visual metrics that assist in determining issues associated with the digitization of analog video media. @@ -11069,6 +11169,7 @@ do not have exactly the same duration in the first file. @end itemize +@anchor{ebur128} @section ebur128 EBU R128 scanner filter. This filter takes an audio stream as input and outputs |