diff --git a/doc/filters.texi b/doc/filters.texi index 9def1dc071..42c78b8786 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -2303,23 +2303,43 @@ If set to 1, fade only alpha channel, if one exists on the input. Default value is 0. @end table -A few usage examples follow, usable too as test scenarios. +@subsection Examples +@itemize +@item +Fade in first 30 frames of video: @example -# fade in first 30 frames of video fade=in:0:30 +@end example -# fade out last 45 frames of a 200-frame video +The command above is equivalent to: +@example +fade=t=in:s=0:n=30 +@end example + +@item +Fade out last 45 frames of a 200-frame video: +@example fade=out:155:45 +@end example -# fade in first 25 frames and fade out last 25 frames of a 1000-frame video +@item +Fade in first 25 frames and fade out last 25 frames of a 1000-frame video: +@example fade=in:0:25, fade=out:975:25 +@end example -# make first 5 frames black, then fade in from frame 5-24 +@item +Make first 5 frames black, then fade in from frame 5-24: +@example fade=in:5:20 +@end example -# fade in alpha over first 25 frames of video +@item +Fade in alpha over first 25 frames of video: +@example fade=in:0:25:alpha=1 @end example +@end itemize @section field