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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 28aaef3..348e8d7 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -3481,12 +3481,12 @@ It accepts the following parameters: @item w, out_w The width of the output video. It defaults to @code{iw}. This expression is evaluated only once during the filter -configuration. +configuration, or when the @samp{w} or @samp{out_w} command is sent. @item h, out_h The height of the output video. It defaults to @code{ih}. This expression is evaluated only once during the filter -configuration. +configuration, or when the @samp{h} or @samp{out_h} command is sent. @item x The horizontal position, in the input video, of the left edge of the output @@ -3646,6 +3646,22 @@ crop=in_w/2:in_h/2:y:10+10*sin(n/10) @end example @end itemize +@subsection Commands + +This filter supports the following commands: +@table @option +@item w, out_w +@item h, out_h +@item x +@item y +Set width/height of the output video and the horizontal/vertical position +in the input video. +The command accepts the same syntax of the corresponding option. + +If the specified expression is not valid, it is kept at its current +value. +@end table + @section cropdetect Auto-detect the crop size. |
