Is there a way to overlay a graph onto a video, plotting each successive point with each frame?

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Reposted since the previous post didn't get resolved!
Hi folks,
I have a script that creates a video from image files, as below:
for i = 1 : numFolders
RawImages = [vidFolders(i).folder '\' vidFolders(i).name];
videoName = [RawImages '\' vidFolders(i).name '.avi'];
addpath(RawImages);
imageFolder = [RawImages '\Images\'];
files = dir([imageFolder '*.tif']);
numImages = length(files);
if ~isfile(videoName)
writerObj = VideoWriter(videoName);
writerObj.FrameRate = 10;
open(writerObj);
for j = 1:numImages
imagePath = [imageFolder files(j).name];
image = imread(imagePath);
image = image(:,:,1:3);
frame = im2frame(image);
writeVideo(writerObj, frame);
end
close(writerObj);
end
end
Each frame of the video is a temperature increment of 1 degree. For each video created, there is a plot that describes the video, as such:
where each point along the line is a degree increment, as with each frame in the video.
My question is: can I overlay the graph onto the video, such that the plot evolves with each frame? In other words, can I append the graph to the video and have the line extend along the X axis with each frame of the video?
I have tried videofig from the File Exchange and I can't get it to work as per:
type redraw;
vid = VideoReader('rhinos.avi');
videofig(vid.NumFrames, @(frm) redraw(frm, vid));
redraw(1, vid);
function redraw(frame, vidObj)
f = vidObj.read(frame);
f2 = edge(rgb2gray(f), 'canny');
f3 = bsxfun(@plus, f, uint8(255*f2));
image(f3); axis image off
end

Accepted Answer

Walter Roberson
Walter Roberson on 12 Oct 2021
The shortcut to start the playing is to press return while focused on the figure. But if you need to automate, then after you run videofig, then
timers = timerfind();
start(timers(end)); %should start the playing

More Answers (1)

yanqi liu
yanqi liu on 12 Oct 2021
for i = 1 : numFolders
RawImages = [vidFolders(i).folder '\' vidFolders(i).name];
videoName = [RawImages '\' vidFolders(i).name '.avi'];
addpath(RawImages);
imageFolder = [RawImages '\Images\'];
files = dir([imageFolder '*.tif']);
numImages = length(files);
if ~isfile(videoName)
writerObj = VideoWriter(videoName);
writerObj.FrameRate = 10;
open(writerObj);
for j = 1:numImages
imagePath = [imageFolder files(j).name];
image = imread(imagePath);
image = image(:,:,1:3);
% add line
image = insertShape(image,'line',[1 1 size(image,2) size(image,1)],'LineWidth',2);
frame = im2frame(image);
writeVideo(writerObj, frame);
end
close(writerObj);
end
end

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