tpad

Temporarily pad video frames.

The filter accepts the following options:

'start'

Specify number of delay frames before input video stream.

'stop'

Specify number of padding frames after input video stream. Set to -1 to pad indefinitely.

'start_mode'

Set kind of frames added to beginning of stream. Can be either add or clone. With add frames of solid-color are added. With clone frames are clones of first frame.

'stop_mode'

Set kind of frames added to end of stream. Can be either add or clone. With add frames of solid-color are added. With clone frames are clones of last frame.

'start_duration, stop_duration'

Specify the duration of the start/stop delay. See (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual for the accepted syntax. These options override start and stop.

'color'

Specify the color of the padded area. For the syntax of this option, check the (ffmpeg-utils)"Color" section in the ffmpeg-utils manual.

The default value of color is "black".