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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index e583e9e9bd..fb32433463 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -439,7 +439,7 @@ aevalsrc=0 @item -Generate a sin signal with frequence of 440 Hz, set sample rate to +Generate a sin signal with frequency of 440 Hz, set sample rate to 8000 Hz: @example aevalsrc="sin(440*2*PI*t)::s=8000" @@ -628,7 +628,7 @@ input plane. They are expressions, and can contain the following constants: @table @option @item w, h -the input width and heigth in pixels +the input width and height in pixels @item cw, ch the input chroma image width and height in pixels @@ -1089,7 +1089,7 @@ following constants: @table @option @item w, h -the input width and heigth +the input width and height @item tw, text_w the width of the rendered text @@ -1367,7 +1367,7 @@ For more information see: @section gradfun Fix the banding artifacts that are sometimes introduced into nearly flat -regions by truncation to 8bit colordepth. +regions by truncation to 8bit color depth. Interpolate the gradients that should go where the bands are, and dither them. @@ -1491,7 +1491,7 @@ The expressions can contain the following constants and functions: @table @option @item w, h -the input width and heigth +the input width and height @item val input value for the pixel component @@ -1688,7 +1688,7 @@ The filter takes the parameters: @var{filter_name}@{:=@}@var{filter_params}. filter. If not specified the default values are assumed. Refer to the official libopencv documentation for more precise -informations: +information: @url{http://opencv.willowgarage.com/documentation/c/image_filtering.html} Follows the list of supported libopencv filters. @@ -1704,7 +1704,7 @@ It accepts the parameters: @var{struct_el}:@var{nb_iterations}. @var{struct_el} represents a structuring element, and has the syntax: @var{cols}x@var{rows}+@var{anchor_x}x@var{anchor_y}/@var{shape} -@var{cols} and @var{rows} represent the number of colums and rows of +@var{cols} and @var{rows} represent the number of columns and rows of the structuring element, @var{anchor_x} and @var{anchor_y} the anchor point, and @var{shape} the shape for the structuring element, and can be one of the values "rect", "cross", "ellipse", "custom". @@ -1805,7 +1805,7 @@ The description of the accepted options follows. @table @option @item rgb If set to 1, force the filter to accept inputs in the RGB -colorspace. Default value is 0. +color space. Default value is 0. @end table Be aware that frames are taken from each input video in timestamp @@ -1892,7 +1892,7 @@ value for @var{width} or @var{height} is 0, the corresponding input size is used for the output. The @var{width} expression can reference the value set by the -@var{height} expression, and viceversa. +@var{height} expression, and vice versa. The default value of @var{width} and @var{height} is 0. @@ -1902,7 +1902,7 @@ Specify the offsets where to place the input image in the padded area with respect to the top/left border of the output image. The @var{x} expression can reference the value set by the @var{y} -expression, and viceversa. +expression, and vice versa. The default value of @var{x} and @var{y} is 0. @@ -2317,7 +2317,7 @@ seconds @item pos position of the frame in the input stream, -1 if this information in -unavailable and/or meanigless (for example in case of synthetic video) +unavailable and/or meaningless (for example in case of synthetic video) @item fmt pixel format name @@ -2766,7 +2766,7 @@ section @ref{frei0r} in the description of the video filters. Some examples follow: @example -# generate a frei0r partik0l source with size 200x200 and framerate 10 +# generate a frei0r partik0l source with size 200x200 and frame rate 10 # which is overlayed on the overlay filter main input frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay @end example @@ -2792,7 +2792,7 @@ separated by ":". The description of the accepted options follows. @item size, s Specify the size of the sourced video, it may be a string of the form -@var{width}x@var{heigth}, or the name of a size abbreviation. The +@var{width}x@var{height}, or the name of a size abbreviation. The default value is "320x240". @item rate, r @@ -2823,7 +2823,7 @@ testsrc=duration=5.3:size=qcif:rate=10 @end example will generate a video with a duration of 5.3 seconds, with size -176x144 and a framerate of 10 frames per second. +176x144 and a frame rate of 10 frames per second. If the input content is to be ignored, @code{nullsrc} can be used. The following command generates noise in the luminance plane by employing |