How can I deserialize codec_data from h.264 (avc) caps

[David Ing]

I can't figure out how to deserialize the codec_data within a caps
structure like this one:

video/x-h264

stream-format=(string)avc
alignment=(string)au
level=(string)4.2
profile=(string)main
codec_data=(buffer)
014d402affe10029674d402a965403c0113f2e02d404040500000300010000030032e04000fa000005dc026a540ed0913501000468ce3520
width=(int)1920
height=(int)1080
framerate=(fraction)25/1
pixel-aspect-ratio=(fraction)1/1
interlace-mode=(string)progressive, parsed=(boolean)true

Can someone point me in the right direction?
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