MATLAB: How to obtain the bitstream from decoded video

bitstream

i have a video. i want to obtain decoded bitstream from that video. how can i do that?

Best Answer

You can use the Image Acquisition toolbox, with getsnapshot() (single frame) or getdata() (multiple frame). That will bring the decoded frames into memory. You can then use the usual tricks to convert the arrays into binary, such as dec2bin()

Alternately, there are tools in the Computer Vision Toolbox, which is more oriented towards video stream processing than single frame processing. But using both toolboxes together would be common.

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MATLAB: Forming bit-stream

I am having difficulty understanding your question as phrased. It is also not clear what bit-stream you are trying to form.

At this time could the question be simplified to "How do I convert numeric data to a bit stream?" If so then use dec2bin, possibly after having used typecast() if needed to re-represent floating point numbers as unsigned integers. dec2bin() will output a string of characters, each '0' or '1'. If you need decimal 0 and decimal 1, then you can subtract '0' from the result, as in

dec2bin(314159) - '0'

MATLAB: How to transmit a h.264 bitstream over USRP, receive it and decode it

I found some functions on File Exchange for encoding and decoding data using H.264 standard. You can refer the following link: https://www.mathworks.com/matlabcentral/fileexchange/47793-h-264-avc-video-stream

Also, there are system objects in Communications Toolbox for sending data to and receiving data from a USRP device. Refer following links for more information:

https://www.mathworks.com/help/supportpkg/usrpradio/ug/comm.sdrutransmitter-system-object.html

https://www.mathworks.com/help/supportpkg/usrpradio/ug/comm.sdrureceiver-system-object.html

Hope this helps in getting started.

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Related Solutions

MATLAB: Forming bit-stream

MATLAB: How to transmit a h.264 bitstream over USRP, receive it and decode it

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