Video to Binary data

I want to convert video (including images and audio) to binary data for some processing can anyone suggest best method for the same.

Answer 1

[Walter Roberson]

filename = 'YourFile.avi';
[fid, msg] = fopen(filename, 'r');   %not 'rt' !
if fid < 0
    error('Failed to open file "%s" because "%s"', filename, msg);
end
bytes = fread(fid, [1 inf], '*uint8');
fclose(fid);

bitstream = reshape(logical(dec2bin(bytes, 8) - '0').', 1, []);

bytes is now a vector of uint8 containing the file -- the entire file, including all audio and video and EXIF and so on.

bitstream is now a vector of false (0) and true (1) values, giving the bytes in MSB-first order.

Answer 2

[Image Analyst]

I don't think MATLAB can extract or write out audio data to or from video files.

[Walter Roberson]

Computer Vision Toolbox can read and write audio in video files.

[Image Analyst]

What functions are those that do that?

[Walter Roberson]

https://www.mathworks.com/help/vision/ref/vision.videofilereader-system-object.html

https://www.mathworks.com/help/vision/ref/vision.videofilewriter-system-object.html

[Image Analyst]

It looks like it requires Simulink? Does it? I don't have Simulink.

[Walter Roberson]

No, those are just Computer Vision toolbox being used in MATLAB. The Simulink blocks are

https://www.mathworks.com/help/vision/ref/frommultimediafile.html

https://www.mathworks.com/help/vision/ref/tomultimediafile.html

Answer 3

[AFIF GUERFI]

file bitstream is not read?

[Walter Roberson]

In the code I posted, the Avi file itself is converted to binary and the stream of bits is stored in the variable bitstream . The bitstream variable is the intended output of the section of code.

Note that the code I posted does not extract the frames or audio from the Avi as images or audio: it deals with the file as a whole, including whatever headers and metadata it might have. The code I posted does not care that the file is a valid Avi file, it only treats it as a chunk of bytes.