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movie2gif

version 1.0 (18.2 MB) by Kenta
A tool for converting movie into gif

14 Downloads

Updated 24 Jul 2021

From GitHub

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Convert movie into gif

This script converts movies into gif file. This demo was created based on MATLAB official document.

What you can do in this script are

  1. Convert your movie files into GIF
  2. When isCrop is set at 1, you can crop the region of interst to save. If you set isCrop=0, you can run this program without the Image Processing Toolbox.
  3. The parameter rate controls the number of frames used for the GIF files. Increase this value if you would like to decrease the GIF file. However, the number of frames used is limited, accordingly, the GIF quality might be decreased.

Reference

  1. imwrite: MATLAB official documentation: Write image to graphics file

image_0.png

clear;clc;close all

The movieName is the movie name to input. Other file types like avi and mov are also fine.

movieName='sample.mp4';

The filename is gif name to save

filename='output.gif';

If you would like to crop the movie, please set isCrop at true.

isCrop=true;

DelayTime represents delay before displaying next image, in seconds

A value of 0 displays images as fast as your hardware allows.

DelayTime=0.1;

The video frame is used for gif for every "rate" frames. For example, if you set at 2, the second, forth, sixth, eighth, ... frames are saved as gif. Increasing this parameter decreases the file size of the gif.

rate=2;

Create video object to read frames from the movie

vidObj = VideoReader(movieName);

Please specify the area to crop if you want

if isCrop==1
    frame = read(vidObj,round(vidObj.NumFrames/2));
    figure;imshow(frame);title('please select the area to save')
    rect=getrect;
    % reset the video object
    vidObj = VideoReader(movieName);
end

figure_0.png

Loop over the movie to convert into gif

idx=1;
while hasFrame(vidObj)
    im = readFrame(vidObj);
    if mod(idx,rate)==1
    if isCrop==1
        im=imcrop(im,rect);
    end
    [A,map] = rgb2ind(im,256);
    if idx == 1
        imwrite(A,map,filename,'gif','LoopCount',Inf,'DelayTime',DelayTime)
    else
        imwrite(A,map,filename,'gif','WriteMode','append','DelayTime',DelayTime);
    end
    end
    idx=idx+1;
end

Cite As

Kenta (2021). movie2gif (https://github.com/KentaItakura/movie2gif-using-MATLAB/releases/tag/1.0), GitHub. Retrieved .

MATLAB Release Compatibility
Created with R2021a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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To view or report issues in this GitHub add-on, visit the GitHub Repository.
To view or report issues in this GitHub add-on, visit the GitHub Repository.