error in making video file

3 次查看（过去 30 天）
Naveen C C
Naveen C C 2014-3-18
回答： Kazem Gheysari 2021-9-6
i have a code which is instructed in matlab itself for video writing. the code is as follows.
videoFReader = vision.VideoFileReader('C:\Users\NAVEEN\Desktop\samp.avi');
videoFWriter = vision.VideoFileWriter('myFile.avi', ...
'FrameRate', videoFReader.info.VideoFrameRate);
% write the first 50 frames of viplanedeparture.avi into myFile.avi
for i=1:50
videoFrame = step(videoFReader);
step(videoFWriter, videoFrame); % write video to myFile.avi
end
release(videoFReader); % close the input file
release(videoFWriter); % close the output file
but when i run this code i am getting error
Error using VideoFileWriter/step
Could not start the filter graph : Access is denied.
Error in Untitled1 (line 7)
step(videoFWriter, videoFrame); % write video to myFile.avi
what is wrong with this code i am using r2013a matlab please help me... thank u in advance

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采纳的回答

Walter Roberson
Walter Roberson 2014-3-18
I suspect you do not have permission to write 'myFile.avi' in whichever directory you happen to be in. Have you considered provided the entire path to be sure that it goes on to your desktop ?
  2 个评论
Naveen C C
Naveen C C 2014-3-18
thank u a lot. its working when i give complete path for videofilewriter. i.e vision.VideoFileWriter('C:\Users\NAVEEN\Desktop\myfile.avi','FrameRate', videoFReader.info.VideoFrameRate');
thank u once again
Naveen C C
Naveen C C 2014-3-18
how to compress the video after saving it. its taking lot of memory (like 600mb for 24sec video).

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更多回答（1 个）

Kazem Gheysari
Kazem Gheysari 2021-9-6
I solved this error, by changeing the folder that is goning to create the video file.
Output_path = 'C:\out\My folder';
videoFWriter = vision.VideoFileWriter(fullfile(Output_path,'myFile.avi'), ...
'FrameRate', videoFReader.info.VideoFrameRate);

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