Save a video from video frames and text

Question

Alice 2016-8-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/300189-save-a-video-from-video-frames-and-text

评论： Alice 2016-8-24

Hi everyone,

I have a video generated from an external software I want to insert dynamic text on each frame. I was able to do so in Matlab with the code below. However, I am clueless about the way to save the new video in a .mp4 or .avi file. I would like to have it in such format so that I can open it from any video readers.

Can anyone help?

Thank you! :-)

Alice

% Import video generated from an external software
v = VideoReader('video_L4_L8_Jan_cc25.mp4');
% Import csv file with metadata of each image
t = readtable('list_L4_L8_Jan_cc25.csv');
% Generate a video with the ID and time of acquisition of each image
figure
FrameRate = 1;
set(gcf,'units','centimeters');
set(gcf,'position',[10 10 30  30]);
axes1 = axes('position', [.05, .05, .9 , .9])
while hasFrame(v)
    vFrames1 = readFrame(v);
    imgNb = v.CurrentTime+1; % Nb of image displayed. +1 becaue CurrentTime starts couting at 0
    image(vFrames1, 'Parent', axes1);
    text(.5, 10, t.LANDSAT_SCENE_ID(imgNb), 'fontsize' , 14, 'Color' , 'w', 'Parent' , axes1);
    text(200, 10, t.DATE_ACQUIRED(imgNb), 'fontsize' , 14, 'Color' , 'w', 'Parent' , axes1);
    axes1.Visible = 'off';
    pause(1/FrameRate);
end