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Diffstat (limited to 'doc/filters.texi')
| -rw-r--r-- | doc/filters.texi | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 2bd7bf56ff..872afc6ca1 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -353,6 +353,39 @@ drawbox drawbox=10:20:200:60:red@@0.5" @end example +@section fade + +Apply fade-in/out effect to input video. + +It accepts the parameters: +@var{type}:@var{start_frame}:@var{nb_frames} + +@var{type} specifies if the effect type, can be either "in" for +fade-in, or "out" for a fade-out effect. + +@var{start_frame} specifies the number of the start frame for starting +to apply the fade effect. + +@var{nb_frames} specifies the number of frames for which the fade +effect has to last. At the end of the fade-in effect the output video +will have the same intensity as the input video, at the end of the +fade-out transition the output video will be completely black. + +A few usage examples follow, usable too as test scenarios. +@example +# fade in first 30 frames of video +fade=in:0:30 + +# fade out last 45 frames of a 200-frame video +fade=out:155:45 + +# fade in first 25 frames and fade out last 25 frames of a 1000-frame video +fade=in:0:25, fade=out:975:25 + +# make first 5 frames black, then fade in from frame 5-24 +fade=in:5:20 +@end example + @section fifo Buffer input images and send them when they are requested. |