writeVideo

Write an RGB image to a Motion JPEG 2000 file with lossless compression.

Create an array containing data from the sample still image, peppers.png.

A = imread("peppers.png");

Create a VideoWriter object for a new video file. Use the "Archival" profile to specify a Motion JPEG 2000 file with lossless compression.

v = VideoWriter("myFile","Archival");

Verify the type of video compression for the new file.

v.VideoCompressionMethod

ans = 
'Motion JPEG 2000'

Open the VideoWriter object for writing and write the image data in A to the file.

open(v)
writeVideo(v,A)

Close the VideoWriter object.

close(v)

Read image and colormap data from the sample indexed image file, corn.tif.

[X,map] = imread("corn.tif");

Create a VideoWriter object for a new indexed AVI file.

v = VideoWriter("myIndexed.avi","Indexed AVI");

Assign the colormap data to the Colormap property of v.

v.Colormap = map;

Open the VideoWriter object for writing. After you open v, you cannot change its properties.

open(v)

Write the image data in X to the video file.

writeVideo(v,X)

Close the VideoWriter object.

close(v)

Create objects to read and write a sample video, and open the AVI file for writing.

reader = VideoReader("xylophone_video.mp4");
writer = VideoWriter("transcoded_xylophone.avi","Uncompressed AVI");

writer.FrameRate = reader.FrameRate;
open(writer);

Read and write each frame.

while hasFrame(reader)
    img = readFrame(reader);
    writeVideo(writer,img)
end

Clear the VideoReader object and close the VideoWriter object.

clear reader
close(writer)

Set up the axes and figure properties to generate frames for the video.

Z = peaks;
surf(Z);
axis tight manual

set(gca,"NextPlot","replacechildren")

Create a VideoWriter object for the output video file and open the object for writing.

v = VideoWriter("peaks.avi");
open(v)

Generate a set of frames, get each frame from the figure, and then write each frame to the file.

for k = 1:20
   surf(sin(2*pi*k/20)*Z,Z)
   frame = getframe(gcf);
   writeVideo(v,frame)
end

Close the VideoWriter object.

close(v)