VideoFrameList

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`VideoFrameList`

[Experimental]

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VideoFrameList[video,n]

gives a list of n images extracted from video.

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VideoFrameList[video,spec]

gives a list of frames extracted based on spec.

Details

VideoFrameList can be used for sampling video frames and can be used as video summarization or for inspection.

Possible settings for frame specification spec include:
n n uniformly spaced frames

{"Uniform",n} n uniformly spaced frames

{"Random",n} n randomly chosen frames

All all frames, if fits in memory
If video has multiple video tracks, only frames from the first track are returned. Use Video[video,VideoTrackSelectionn] to extract frames from the n track.

Examples

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

Extract four frames from a video:

In[1]:=1

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https://wolfram.com/xid/01zkzslru0a-kzazev

In[3]:=3

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https://wolfram.com/xid/01zkzslru0a-g5miga

Out[3]=3

Scope (3)Survey of the scope of standard use cases

Extract frames from a local video object:

In[3]:=3

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https://wolfram.com/xid/01zkzslru0a-jknmat

In[5]:=5

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https://wolfram.com/xid/01zkzslru0a-od9zb2

Out[5]=5

Explicitly ask for uniformly sampled frames from the video:

In[1]:=1

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https://wolfram.com/xid/01zkzslru0a-5cfcj9

In[2]:=2

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https://wolfram.com/xid/01zkzslru0a-7sb86j

Out[2]=2

Extract a few random frames:

In[3]:=3

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https://wolfram.com/xid/01zkzslru0a-7zcolq

Out[3]=3

Extract frames from a remote video file:

In[1]:=1

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https://wolfram.com/xid/01zkzslru0a-jyerpm

In[2]:=2

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https://wolfram.com/xid/01zkzslru0a-hd0bui

Out[2]=2

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

Create a thumbnail grid from a video:

In[1]:=1

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https://wolfram.com/xid/01zkzslru0a-yfx4vd

In[2]:=2

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https://wolfram.com/xid/01zkzslru0a-isgu8n

Out[2]=2

Properties & Relations (2)Properties of the function, and connections to other functions

VideoFrameList partitions the video into equal partitions and extracts the middle frame of each partition:

In[5]:=5

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https://wolfram.com/xid/01zkzslru0a-9fb50u

In[6]:=6

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https://wolfram.com/xid/01zkzslru0a-riqh53

Out[6]=6

Use VideoExtractFrames to extract frames at specific times:

In[7]:=7

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https://wolfram.com/xid/01zkzslru0a-xi7d89

Out[7]=7

In[8]:=8

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https://wolfram.com/xid/01zkzslru0a-ed1a8p

Out[8]=8

Generate a Video object with multiple video tracks:

In[1]:=1

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https://wolfram.com/xid/01zkzslru0a-ijkg88

In[2]:=2

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https://wolfram.com/xid/01zkzslru0a-wnpb4r

Out[2]=2

VideoFrameList extracts frames from the first video track:

In[3]:=3

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https://wolfram.com/xid/01zkzslru0a-833rhf

Out[3]=3

Extract frames from the second video track by selecting the track in the Video object:

In[4]:=4

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https://wolfram.com/xid/01zkzslru0a-8w24kp

Out[4]=4

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