divide the multiple frames

2013 1 21
1 个回答
4 次查看（30 天）

0 个投票

sir,
In the movie file consists the 498 frames i process the all frames for my project gone for out of memory so that i would like to process only the 7multiples of frames. my doubt is regards how to taken the all multiples of 7 frames in the loop format
i did
readerobj = mmreader('dec.wmv');
frame = read(readerobj,inf);
y=readerobj.NumberOfFrames;
for loop=1:y
loop=loop+7;
Image = read( readerobj,loop);
but its not taken the 7 multiples of frame how to resolve it

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回答（1 个）

Walter Roberson
Walter Roberson 2013-1-21
编辑：Walter Roberson 2013-1-21

0 个投票

for loop=1:7:y
Images = read( readerobj,[loop loop+6]);

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ajith
ajith 2013-1-21
y =498
for loop=1:7:y
Images = read( readerobj,[loop]);
shows the error ??? The frame index requested is beyond the end of the file.
Error in ==> mmreader.read at 74 videoFrames = read(getImpl(obj), index);
Error in ==> mainfunctionclc at 17 Image = read( readerobj,[loop]);
how to resolve the error sir
Walter Roberson
Walter Roberson 2013-1-21
Is your dec.wmv file a Variable Frame Rate? Are you getting warnings about it being variable frame rate, or is readerobj.NumberOfFrames returning reasonable values?
ajith
ajith 2013-1-28
yes sir shows the reasonable value as 498
Walter Roberson
Walter Roberson 2013-1-28
Try
for loop = 480:498
fprintf('about to try frame %d\n', loop);
try
Images = read(readerobj, loop);
fprintf('got frame %d\n', loop);
catch ME
fprintf('problem on frame %d\n, loop);
end
end
and see how far it gets.
ajith
ajith 2013-1-29
Warning: Unable to determine the number of frames in this file.
about to try frame 480
got frame 480
upto 498 frames are processed sir but loop starts from 1 to 498 frames shows beyond the out of frames

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ajith
ajith
2013-1-21

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