poster
2019-12-10, 20:48
伙计们，我想将avi文件转换为yuv 420视频剪辑。有什么方法可以做到吗？谢谢！
回答：
您可以使用内置的mmreader类 (http://www.mathworks.com/access/helpdesk/help/techdoc/import_export/f5-132080.html#f5-146610)将AVI文件读取到MATLAB 中 (http://www.mathworks.com/access/helpdesk/help/techdoc/import_export/f5-132080.html#f5-146610) 。将AVI帧读入电影帧的结构数组后，可以使用此提交中的MathFile File Exchange中 (http://www.mathworks.com/matlabcentral/fileexchange/)的saveFileYuv函数将它们保存为YUV文件：
通过Da Yu (http://www.mathworks.com/matlabcentral/fileexchange/authors/16240) 将YUV CIF 4：2：0视频文件转换为图像文件 (http://www.mathworks.com/matlabcentral/fileexchange/6318-convert-yuv-cif-420-video-file-to-image-files)
您的代码可能看起来像这样：
%# Get the video data: vidObj = mmreader('myVideo.avi'); %# Create a video file object nFrames = vidObj.NumberOfFrames; %# Get the number of frames vidHeight = vidObj.Height; %# Get the image height vidWidth = vidObj.Width; %# Get the image width %# Preallocate the structure array of movie frames: mov(1:nFrames) = struct('cdata',zeros(vidHeight,vidWidth,3,'uint8'),... 'colormap',[]); %# Note that colormap is empty! %# Read each video frame into the structure array: for k = 1:nFrames mov(k).cdata = read(vidObj,k); %# Place frame k in the cdata field of mov(k) end %# Save the movie frame array as a YUV 4:2:0 file: saveFileYuv(mov,'myVideo.yuv',1);
更多&回答... (https://stackoverflow.com/questions/3615036)
回答：
您可以使用内置的mmreader类 (http://www.mathworks.com/access/helpdesk/help/techdoc/import_export/f5-132080.html#f5-146610)将AVI文件读取到MATLAB 中 (http://www.mathworks.com/access/helpdesk/help/techdoc/import_export/f5-132080.html#f5-146610) 。将AVI帧读入电影帧的结构数组后，可以使用此提交中的MathFile File Exchange中 (http://www.mathworks.com/matlabcentral/fileexchange/)的saveFileYuv函数将它们保存为YUV文件：
通过Da Yu (http://www.mathworks.com/matlabcentral/fileexchange/authors/16240) 将YUV CIF 4：2：0视频文件转换为图像文件 (http://www.mathworks.com/matlabcentral/fileexchange/6318-convert-yuv-cif-420-video-file-to-image-files)
您的代码可能看起来像这样：
%# Get the video data: vidObj = mmreader('myVideo.avi'); %# Create a video file object nFrames = vidObj.NumberOfFrames; %# Get the number of frames vidHeight = vidObj.Height; %# Get the image height vidWidth = vidObj.Width; %# Get the image width %# Preallocate the structure array of movie frames: mov(1:nFrames) = struct('cdata',zeros(vidHeight,vidWidth,3,'uint8'),... 'colormap',[]); %# Note that colormap is empty! %# Read each video frame into the structure array: for k = 1:nFrames mov(k).cdata = read(vidObj,k); %# Place frame k in the cdata field of mov(k) end %# Save the movie frame array as a YUV 4:2:0 file: saveFileYuv(mov,'myVideo.yuv',1);
更多&回答... (https://stackoverflow.com/questions/3615036)