Read video frame data from file will be removed in a future release. Use VideoReader.readFrame instead.


  • video = read(v)
  • video = read(v,index)
  • video = read(___,'native')


video = read(v) reads all video frames from the file associated with v.


video = read(v,index) reads only the frames specified by index.

video = read(___,'native') returns data in the format specified by the VideoFormat property and can include any of the input arguments in the previous syntaxes.


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Select Video Frames to Read

Create a VideoReader object for the example movie file, xylophone.mp4.

v = VideoReader('xylophone.mp4');

Read only the first video frame.

video = read(v,1);

Read only the last video frame.

video = read(v,Inf);

Read frames 5 through 10.

video = read(v,[5 10]);

Read from the 50th frame to the end of the video file.

video = read(v,[50 Inf]);

Input Arguments

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v — Input VideoReader objectVideoReader object

Input VideoReader object. Use the VideoReader function to create a VideoReader object from your video file.

index — Frames to read[1 Inf] (default) | numeric scalar | two-element array

Frames to read, specified as a numeric scalar or a two-element array.

  • To read a single frame, specify a numeric scalar.

  • To read a range of frames, specify a two-element array.

The first frame number is 1, and Inf represents the last frame of the file.

Example: 10

Example: Inf

Example: [1 20]

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

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video — Video frame datanumeric array | structure array

Video frame data, returned as a numeric or structure array. The size and format of video depends on the VideoFormat property of v. When the VideoFormat property of v is 'Indexed' or 'Grayscale', the data type and dimensions of video depend on whether you call read with the 'native' argument. For most files, the data type and dimensions of video are as follows.

H is the image frame height, W is the image frame width, and F is the number of frames read.

Value of obj.VideoFormatData Type of videoDimensions of videoDescription
'RGB24', with or without specifying 'native'uint8


RGB24 image

'Grayscale', without specifying 'native'uint8


Grayscale image

'Indexed', without specifying 'native'uint8


RGB24 image

'Grayscale' or 'Indexed', specifying 'native'struct


MATLAB® movie, which is an array of frame structure arrays, each containing the fields cdata and colormap.

For Motion JPEG 2000 files, the data type and dimensions of video are as follows.

Value of obj.VideoFormatData Type of videoDimensions of videoDescription


Mono image

'Mono8 Signed'int8


Mono signed image



Mono image

'Mono16 Signed'int16


Mono signed image



RGB24 image

'RGB24 Signed'int8


RGB24 signed image



RGB48 image

'RGB48 Signed'int16


RGB48 signed image

See Also


Introduced in R2010b

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