Question

我有一个jpg文件夹，我想让它们成为一部电影。我正在使用这个脚本：

% Create video out of list of jpgs
clear 
clc

% Folder with all the image files you want to create a movie from, choose this folder using:
ImagesFolder = uigetdir;

% Verify that all the images are in the correct time order, this could be useful if you were using any kind of time lapse photography. We can do that by using dir to map our images and create a structure with information on each file.
jpegFiles = dir(strcat(ImagesFolder,'\*.jpg'));

% Sort by date from the datenum information.
S = [jpegFiles(:).datenum]; 
[S,S] = sort(S);
jpegFilesS = jpegFiles(S);
% The sub-structures within jpegFilesS is now sorted in ascending time order.
% Notice that datenum is a serial date number, for example, if you would like to get the time difference in hours between two images you need to subtract their datenum values and multiply by 1440.

% Create a VideoWriter object, in order to write video data to an .avi file using a jpeg compression.
VideoFile = strcat(ImagesFolder,'\MyVideo');
writerObj = VideoWriter(VideoFile);

% Define the video frames per second speed (fps)
fps = 1; 
writerObj.FrameRate = fps;

% Open file for writing video data
open(writerObj);

% Running over all the files, converting them to movie frames using im2frame and writing the video data to file using writeVideo
for t = 1:length(jpegFilesS)
     Frame = imread(strcat(ImagesFolder,'\',jpegFilesS(t).name));
     writeVideo(writerObj,im2frame(Frame));
end

% Close the file after writing the video data 
close(writerObj);

（由http://imageprocessingblog.com/how-to-create-a-video-from-image-files/提供）

但它给了我这个错误：

警告：没有视频帧写入此文件。该文件可能无效   ＆GT;在VideoWriter.VideoWriter＆gt; VideoWriter.close at 289
  在Movie_jpgCompilation at 37

我确定我的jpg文件很好，并且它们位于我指定的文件夹中。有什么问题？

Answer 1

（这是我的第一篇文章，所以我希望它有所帮助。）

如果您使用的是Linux，那么反斜杠是否需要为正斜杠？当我在Mac上运行它时，jpegFiles为空Struct。当我改变它们时，它起作用了：

% Create video out of list of jpgs
clear 
clc

% Folder with all the image files you want to create a movie from, choose this folder using:
ImagesFolder = uigetdir;

% Verify that all the images are in the correct time order, this could be useful if you were using any kind of time lapse photography. We can do that by using dir to map our images and create a structure with information on each file.
jpegFiles = dir(strcat(ImagesFolder,'/*.jpg'));

% Sort by date from the datenum information.
S = [jpegFiles(:).datenum]; 
[S,S] = sort(S);
jpegFilesS = jpegFiles(S);
% The sub-structures within jpegFilesS is now sorted in ascending time order.
% Notice that datenum is a serial date number, for example, if you would like to get the time difference in hours between two images you need to subtract their datenum values and multiply by 1440.

% Create a VideoWriter object, in order to write video data to an .avi file using a jpeg compression.
VideoFile = strcat(ImagesFolder,'/MyVideo.avi');
writerObj = VideoWriter(VideoFile);

% Define the video frames per second speed (fps)
fps = 1; 
writerObj.FrameRate = fps;

% Open file for writing video data
open(writerObj);

% Running over all the files, converting them to movie frames using im2frame and writing the video data to file using writeVideo
for t = 1:length(jpegFilesS)
     Frame = imread(strcat(ImagesFolder,'/',jpegFilesS(t).name));
     writeVideo(writerObj,im2frame(Frame));
end

% Close the file after writing the video data 
close(writerObj);

编辑：您还可以使用filesep，以便文件分隔符是特定于操作系统的。 http://www.mathworks.com/help/matlab/ref/filesep.html

Answer 2

使用Windows Movie Maker [windows]或iMovie [mac]会更简单。尽管你应该使用PowerPoint。

将图像列表转换为电影

2 个答案: