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lavfi/drawtext: add generic timeline interface and deprecate "draw".

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Clément Bœsch
2013-08-20 20:56:39 +02:00
parent 493ebbd7eb
commit 30d40c9e86
3 changed files with 40 additions and 15 deletions
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12
doc/filters.texi
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@@ -3239,16 +3239,6 @@ Either a string (e.g. "yellow") or in 0xRRGGBB[AA] format
(e.g. "0xff00ff"), possibly followed by an alpha specifier.
The default value of @var{boxcolor} is "white".
@item draw
Set an expression which specifies if the text should be drawn. If the
expression evaluates to 0, the text is not drawn. This is useful for
specifying that the text should be drawn only when specific conditions
are met.
Default value is "1".
See below for the list of accepted constants and functions.
@item expansion
Select how the @var{text} is expanded. Can be either @code{none},
@code{strftime} (deprecated) or
@@ -3548,7 +3538,7 @@ drawtext="fontsize=60:fontfile=FreeSerif.ttf:fontcolor=green:text=g:x=(w-max_gly
@item
Show text for 1 second every 3 seconds:
@example
drawtext="fontfile=FreeSerif.ttf:fontcolor=white:x=100:y=x/dar:draw=lt(mod(t\,3)\,1):text='blink'"
drawtext="fontfile=FreeSerif.ttf:fontcolor=white:x=100:y=x/dar:enable=lt(mod(t\,3)\,1):text='blink'"
@end example
@item