FFmpeg 4.2.10
Since* 0.7
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Apply a fade-in/out effect to the input video.

It accepts the following parameters:

type, t

The effect type can be either "in" for a fade-in, or "out" for a fade-out effect. Default is in.

start_frame, s

Specify the number of the frame to start applying the fade effect at. Default is 0.

nb_frames, n

The number of frames that the fade effect lasts. 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 filled with the selected color. Default is 25.

alpha

If set to 1, fade only alpha channel, if one exists on the input. Default value is 0.

start_time, st

Specify the timestamp (in seconds) of the frame to start to apply the fade effect. If both start_frame and start_time are specified, the fade will start at whichever comes last. Default is 0.

duration, d

The number of seconds 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 filled with the selected color. If both duration and nb_frames are specified, duration is used. Default is 0 (nb_frames is used by default).

color, c

Specify the color of the fade. Default is "black".

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Examples

  • Fade in the first 30 frames of video:

    fade=in:0:30

    The command above is equivalent to:

    fade=t=in:s=0:n=30
  • Fade out the last 45 frames of a 200-frame video:

    fade=out:155:45
    fade=type=out:start_frame=155:nb_frames=45
  • Fade in the first 25 frames and fade out the last 25 frames of a 1000-frame video:

    fade=in:0:25, fade=out:975:25
  • Make the first 5 frames yellow, then fade in from frame 5-24:

    fade=in:5:20:color=yellow
  • Fade in alpha over first 25 frames of video:

    fade=in:0:25:alpha=1
  • Make the first 5.5 seconds black, then fade in for 0.5 seconds:

    fade=t=in:st=5.5:d=0.5