convert images to a video

method 1 : use =avconv= package in Linux

 e.g.  to convert images (v_1.png, v_2.png ...) to 'velocity.mp4'

avconv -i v_%d.png -b:v 1000k velocity.mp4

 

to convert images (v_001.png, v_002.png ...) to 'velocity.mp4'

 avconv -i v_%03d.png -b:v 1000k velocity.mp4

 

- i :: input file
- b :: bitrate

 

What bitrate should I use when encoding my video?

File size = bitrate (kilobits per second) x duration

Output size	Bitrate	Filesize
320x240 pixels	400 kbps	3MB / minute
480x270 pixels	700 kbps	5MB / minute
1024 x 576 pixels	1500 kbps	11MB / minute
1280x720 pixels	2500 kbps	19MB / minute
1920x1080 pixels	4000 kbps	30MB / minute

kbps= Kilo Bits Per Second

 

 

References:

https://stackoverflow.com/questions/16315192/avconv-make-a-video-from-a-subset-on-images

https://libav.org/avconv.html

https://www.ezs3.com/public/What_bitrate_should_I_use_when_encoding_my_video_How_do_I_optimize_my_video_for_the_web.cfm

Method 2 - MakeAVI (package) - Windows

http://makeavi.sourceforge.net/

 

Method 3 - ffmpeg (package) - Windows

ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' -c:v libx264 -r 30 -pix_fmt yuv420p output.mp4

ffmpeg -framerate 1 -i "*.jpg"  output.mp4

https://www.gyan.dev/ffmpeg/builds/

Method 4 - matlab code

clc
clear
step=63;
for i=3:step
    h=figure(1); % ÏÂÃæÒ»ÐÐÌ滻ΪÏëÒªÏÔʾµÄÄÚÈÝ
%     set(0,'defaultfigurecolor','w')
    f_name=strcat('AnimationFrame',num2str(i,'%.6d'),'.jpg')
    aa=imread([f_name]);
    cc=imcrop(aa,[20 20 2000 800]);
    imshow(cc)
%     imshow([f_name]);
%   imshow([num2str(i),'.jpg']);
    frame = getframe(h);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im,256);
    % Write to the GIF File?
    if i==1
        imwrite(imind,cm,['Frame','.gif'],'gif', 'Loopcount',inf,'DelayTime',0.1);
    elseif i==step
        imwrite(imind,cm,['Frame','.gif'],'gif','WriteMode','append','DelayTime',0.1);
    else
        imwrite(imind,cm,['Frame','.gif'],'gif','WriteMode','append','DelayTime',0.1);
    end
end