Is there an open-source solution for extract the RAW files from the Canon R6 II's pre-capture rolls ?

Hello,

Is there an open-source solution that would allow Digikam to extract the 
RAW files from the Canon R6 II's pre-capture rolls and save them as a 
single RAW file that Digikam can use?


« Continuous Shooting : RAW Burst 30fps with 0.3 or  0.5 seconds pre 
record for max approx 191 frames »
CF.
https://www.canon-europe.com/cameras/eos-r6-mark-ii/specifications/#



« On the R6 Mark II (and cameras such as the EOS R8 and R10), 
pre-capture RAW files are saved as a group of shots called RAW Burst. 
These currently can’t be read by the usual RAW converters such as 
Photoshop CC or Lightroom Classic CC, and instead need to be extracted 
manually using software such as Canon’s proprietary DPP (Digital Photo 
Professional). »
CF.
https://www.digitalcameraworld.com/cameras/pre-capture-on-my-canon-eos-r6-mark-ii-camera-is-brilliant-but-the-feature-is-flawed-for-this-one-reason

--
Benoît