Video to Binary data

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mayank jain 2020-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/498785-video-to-binary-data

评论： Walter Roberson 2021-11-17

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

回答（3 个）

Walter Roberson 2020-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/498785-video-to-binary-data#answer_408542

在 MATLAB Online 中打开

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.

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Baghdadi Aya 2021-11-16

And how can I display the video from this bytestream ?

bytestream = reshape(uint8(bin2dec(reshape(char(bitstream+'0'),8,[]).')),1,[]);

Walter Roberson 2021-11-17

@Baghdadi Aya

As I wrote above, you would have to write the stream of bytes to a file, and then read it from the file.

Note that this code is for sending over the entire file, including any audio, and any video and any copyright information, and Closed Captions For The Hearing Impaired, and everything in the file.

The code to send only video is different.

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Image Analyst 2020-1-3

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https://ww2.mathworks.cn/matlabcentral/answers/498785-video-to-binary-data#answer_408589

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

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Image Analyst 2020-8-6

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

Walter Roberson 2020-8-7

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

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AFIF GUERFI 2020-8-6

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https://ww2.mathworks.cn/matlabcentral/answers/498785-video-to-binary-data#answer_476209

file bitstream is not read?

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Walter Roberson 2020-8-6

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.

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