GridVideo

[Experimental]

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GridVideo[{v₁,v₂,…}]

creates a video in which each frame is a grid of frames of all v_i at the corresponding time.

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GridVideo[{{v₁₁,v₁₂,…},…}]

uses the array position of each video v_ij to create the video grid.

Details and Options

GridVideo is also known as video collage.
GridVideo can be used to show multiple videos at the same time. Creating video grids is very common when showing multiple people in a meeting, playing instruments or showing a scene from different viewpoints.

Any of the grid elements v_ij can be any of the following:

	video	a Video object
	image	an Image or Graphics
	func	an arbitrary function returning an image or graphics
	Missing[…]	introduces open space filled with the background color

Options to control assembly of frames are:

	Background	GrayLevel[0.2]	background color
	ConformationMethod	Automatic	how to conform frames of different sizes
	PaddingSize	Automatic	padding size around the output frame
	Spacings	Automatic	spacing between input frames
	VideoPadding	Automatic	video track padding scheme for shorter videos

Settings for Spacings can have the following forms:

	n	use n pixels for spacing between frames
	Scaled[s]	use a fraction s of the image size for spacing
	{spec_x,spec_y}	use specific spacing for each dimension

By default, GridVideo places the new video under the "Video" directory in $WolframDocumentsDirectory.
Options to control properties of the output video are:

	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
	RasterSize	Automatic	raster size of the output video
	VideoEncoding	Automatic	video encoding to use
	VideoTransparency	False	whether the output video should have a transparency channel

Examples

open allclose all

Basic Examples (1)Summary of the most common use cases

Grid of videos:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-h4q3uz

Out[1]=1

Scope (4)Survey of the scope of standard use cases

Create a grid video from a list of videos:

In[2]:=2

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https://wolfram.com/xid/0en0fvhtq-y9pdqz

Out[2]=2

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-30qekp

Out[1]=1

Create a grid video from a 2D array of videos to enforce the position of each video in the grid:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-7wa2q2

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0en0fvhtq-tn3d4c

Out[2]=2

Create a grid video from a list of an odd number of videos:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-c3nk1n

Out[1]=1

Use Missing to specify where the empty space should be:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-vmxu2c

Out[1]=1

Options (5)Common values & functionality for each option

Background (1)

Background is shown when empty spaces are present and for spacings and paddings:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-hj2w11

Out[1]=1

Specify the background color:

In[2]:=2

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https://wolfram.com/xid/0en0fvhtq-qu0pui

Out[2]=2

ConformationMethod (1)

By default, videos with different frame sizes are conformed using the "Fit" method:

In[5]:=5

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https://wolfram.com/xid/0en0fvhtq-h1h28x

In[6]:=6

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https://wolfram.com/xid/0en0fvhtq-r19zid

Out[6]=6

Use the ConformationMethod option to specify how videos should be conformed:

In[7]:=7

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https://wolfram.com/xid/0en0fvhtq-v3deg4

Out[7]=7

PaddingSize (1)

Use the PaddingSize option to control the padding size around the output frame:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-7psgza

Out[1]=1

Spacings (1)

Use the Spacings option to control the spacings between the input frames:

In[1]:=1

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https://wolfram.com/xid/0en0fvhtq-17naya

Out[1]=1

Use both Spacings and PaddingSize to add spaces between and around images:

In[2]:=2

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https://wolfram.com/xid/0en0fvhtq-m7smyu

Out[2]=2

VideoPadding (1)

Create a list of videos of different durations:

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https://wolfram.com/xid/0en0fvhtq-ho7zqg

In[39]:=39

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https://wolfram.com/xid/0en0fvhtq-786av0

Out[39]=39

By default, shorter videos are padded using black frames:

In[35]:=35

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https://wolfram.com/xid/0en0fvhtq-pkhiit

Out[35]=35

Specify a different color padding:

In[36]:=36

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https://wolfram.com/xid/0en0fvhtq-3cxwpb

Out[36]=36

Use "Fixed" padding to repeat the last available frame:

In[37]:=37

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https://wolfram.com/xid/0en0fvhtq-tk3416

Out[37]=37

Applications (1)Sample problems that can be solved with this function

Grid of videos from various effects:

In[6]:=6

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https://wolfram.com/xid/0en0fvhtq-scsfnz

Out[6]=6

In[2]:=2

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https://wolfram.com/xid/0en0fvhtq-bw1437

Out[2]=2

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