mpeg file
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Hi
I have two task that are similar that I dont know how to do:
1 - I want to be able to import an mpeg video and save each frame of this movie as individual images into a folder.
2 - Also, I want to be able to create an mpeg video given a number of individual images saved in a folder.
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Walter Roberson
am 19 Jul. 2011
If you have a new enough MATLAB version, you could perhaps us the VideoReader class; older versions called it the mmreader. Extract frame by frame and use imwrite(). See http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F for information on automatic filename generation for such purposes.
Given a series of frames read in by imread() (in conjunction with dir() to find the file names), you can use the VideoWriter() class to produce a .avi .
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James
am 20 Jul. 2011
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Walter Roberson
am 21 Jul. 2011
Yes, double() keeps the same numeric values, such as uint8(42) becoming the double precision number 42.0. That is fine for some kinds of computations, but if you try to display or imwrite() a double precision array with such values you will have problems, as the expected range for representing graphics in double precision variables is 0 to 1. im2double() converts the data type _and_ rescales the values to be in the range 0 to 1.
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