VideoFrameFold

VideoFrameFold[f,img₀,video]

gives a video whose frames are {f[img₀,img₁], f[f[img₀,img₁],img₂],…}, where img_i are frames of video.

assumes the first frame to be the initial frame.

VideoFrameFold[f,img₀,video,n]

uses partitions of n frames of the video for each step.

VideoFrameFold[f,img₀,video,n,d]

uses partitions of n frames with offset of d frames for each step.

Details and Options

VideoFrameFold can be used to perform a computation that would benefit from results computed on previous frames, such as tracking, stabilization and more.

Using VideoFrameFold[f,img₀,video,n], the partition slides by one frame.
The function f should return an image for each frame or partition of frames.
In VideoFrameFold[f,img₀,{video₁,video₂,…},…], data provided to f is a list where the element corresponds to the frame or frames extracted from video_i.
Frame variables n and d can be given as a scalar specifying the number of frames or a time Quantity object.
By default, VideoFrameFold places the new video under the "Video" directory in $WolframDocumentsDirectory.
VideoFrameFold supports video containers and codecs specified by $VideoEncoders and $VideoDecoders.
The following options can be given:

AudioEncoding	Automatic	audio encoding to use
CompressionLevel	Automatic	compression level to use
FrameRate	Automatic	the frame rate to use
GeneratedAssetFormat	Automatic	the format of the result
GeneratedAssetLocation	$GeneratedAssetLocation	the location of the result
OverwriteTarget	False	whether to overwrite an existing file
SubtitleEncoding	Automatic	subtitle encoding to use
VideoEncoding	Automatic	video encoding to use

Blend frames over time:

Follow through a batter's swing during the hit:

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